/* ==========================================================================
   1コまえ｜脳トレ無料ゲーム - STYLING SHEET Ver.2.0 (style.css)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES & COLOR SYSTEM
   -------------------------------------------------------------------------- */
:root {
    --font-jp: 'Zen Maru Gothic', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-en: 'Outfit', sans-serif;

    /* Theme: Pastel (Default) */
    --bg-app: linear-gradient(135deg, #f0f7f4 0%, #e2efe9 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.85);
    --bg-button-neutral: #f3fcf8;
    --border-button-neutral: #cce8dc;
    --text-primary: #2b4c3f;
    --text-secondary: #587b6d;
    --text-light: #5f8675;

    --color-practice: #0277bd;
    --color-practice-light: #e1f5fe;
    --color-beginner: #2e7d32;
    --color-beginner-light: #e8f5e9;
    --color-intermediate: #e65100;
    --color-intermediate-light: #fff3e0;
    --color-advanced: #e91e63;
    --color-advanced-light: #fce4ec;
    --color-super: #9c27b0;
    --color-super-light: #f3e5f5;

    --color-correct: #2ecc71;
    --color-correct-light: #e8f8f0;
    --color-wrong: #e74c3c;
    --color-wrong-light: #fdedec;
    --color-accent: #3498db;
    --color-accent-light: #ebf5fb;

    --card-shadow: 0 12px 24px -4px rgba(43, 76, 63, 0.08), 0 4px 12px -2px rgba(43, 76, 63, 0.04);
    --button-shadow: 0 6px 0px 0px #c5e0d4, 0 10px 16px -2px rgba(43, 76, 63, 0.12);
    --button-shadow-active: 0 2px 0px 0px #c5e0d4, 0 4px 8px -2px rgba(43, 76, 63, 0.08);
    --border-radius-xl: 32px;
    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 10px;

    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Theme: Dark */
body.theme-dark {
    --bg-app: linear-gradient(135deg, #121815 0%, #1e2923 100%);
    --bg-card: #25332c;
    --bg-header: rgba(37, 51, 44, 0.85);
    --bg-button-neutral: #2c3d35;
    --border-button-neutral: #3e564a;
    --text-primary: #e6f2ec;
    --text-secondary: #a3c2b4;
    --text-light: #729687;
    --color-practice: #29b6f6;
    --color-practice-light: rgba(41, 182, 246, 0.15);
    --color-beginner: #81c784;
    --color-beginner-light: rgba(129, 199, 132, 0.15);
    --color-intermediate: #ffb74d;
    --color-intermediate-light: rgba(255, 183, 77, 0.15);
    --color-advanced: #f06292;
    --color-advanced-light: rgba(240, 98, 146, 0.15);
    --color-super: #ba68c8;
    --color-super-light: rgba(186, 104, 200, 0.15);
    --color-correct: #2ecc71;
    --color-correct-light: rgba(46, 204, 113, 0.15);
    --color-wrong: #e74c3c;
    --color-wrong-light: rgba(231, 76, 60, 0.15);
    --color-accent: #3498db;
    --color-accent-light: rgba(52, 152, 219, 0.15);
    --card-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
    --button-shadow: 0 6px 0px 0px #1c2621, 0 10px 16px rgba(0, 0, 0, 0.2);
    --button-shadow-active: 0 2px 0px 0px #1c2621, 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Theme: High Contrast */
body.theme-contrast {
    --bg-app: #000000;
    --bg-card: #121212;
    --bg-header: #121212;
    --bg-button-neutral: #222222;
    --border-button-neutral: #ffffff;
    --text-primary: #ffffff;
    --text-secondary: #ffff00;
    --text-light: #e0e0e0;
    --color-practice: #00ffff;
    --color-practice-light: rgba(0, 255, 255, 0.15);
    --color-beginner: #00ff00;
    --color-beginner-light: rgba(0, 255, 0, 0.15);
    --color-intermediate: #ffaa00;
    --color-intermediate-light: rgba(255, 170, 0, 0.15);
    --color-advanced: #ff00ff;
    --color-advanced-light: rgba(255, 0, 255, 0.15);
    --color-super: #00ffff;
    --color-super-light: rgba(0, 255, 255, 0.15);
    --color-correct: #00ff00;
    --color-correct-light: rgba(0, 255, 0, 0.2);
    --color-wrong: #ff0000;
    --color-wrong-light: rgba(255, 0, 0, 0.2);
    --color-accent: #00ffff;
    --color-accent-light: rgba(0, 255, 255, 0.2);
    --card-shadow: none;
    --button-shadow: 0 6px 0px 0px #ffffff, 0 0px 0px rgba(0, 0, 0, 0);
    --button-shadow-active: 0 2px 0px 0px #ffffff;
}

/* Theme: Sakura */
body.theme-sakura {
    --bg-app: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-button-neutral: #fdf2f8;
    --border-button-neutral: #f9a8d4;
    --text-primary: #831843;
    --text-secondary: #be185d;
    --text-light: #c44080;
    --color-practice: #0284c7;
    --color-practice-light: #e0f2fe;
    --color-beginner: #be185d;
    --color-beginner-light: #fce7f3;
    --color-intermediate: #d97706;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #dc2626;
    --color-advanced-light: #fee2e2;
    --color-super: #7c3aed;
    --color-super-light: #ede9fe;
    --color-correct: #10b981;
    --color-correct-light: #d1fae5;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #8b5cf6;
    --color-accent-light: #ede9fe;
    --card-shadow: 0 12px 24px -4px rgba(131, 24, 67, 0.08), 0 4px 12px -2px rgba(131, 24, 67, 0.04);
    --button-shadow: 0 6px 0px 0px #f9a8d4, 0 10px 16px -2px rgba(131, 24, 67, 0.12);
    --button-shadow-active: 0 2px 0px 0px #f9a8d4;
}

/* Theme: Ocean */
body.theme-ocean {
    --bg-app: linear-gradient(135deg, #0c1929 0%, #0a1628 100%);
    --bg-card: #132238;
    --bg-header: rgba(19, 34, 56, 0.9);
    --bg-button-neutral: #1a2f4a;
    --border-button-neutral: #2d4a6f;
    --text-primary: #e0f2fe;
    --text-secondary: #7dd3fc;
    --text-light: #38bdf8;
    --color-practice: #0ea5e9;
    --color-practice-light: rgba(14, 165, 233, 0.15);
    --color-beginner: #22d3ee;
    --color-beginner-light: rgba(34, 211, 238, 0.15);
    --color-intermediate: #f59e0b;
    --color-intermediate-light: rgba(245, 158, 11, 0.15);
    --color-advanced: #f472b6;
    --color-advanced-light: rgba(244, 114, 182, 0.15);
    --color-super: #a855f7;
    --color-super-light: rgba(168, 85, 247, 0.15);
    --color-correct: #34d399;
    --color-correct-light: rgba(52, 211, 153, 0.15);
    --color-wrong: #f87171;
    --color-wrong-light: rgba(248, 113, 113, 0.15);
    --color-accent: #60a5fa;
    --color-accent-light: rgba(96, 165, 250, 0.15);
    --card-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    --button-shadow: 0 6px 0px 0px #0f2440, 0 10px 16px rgba(0, 0, 0, 0.3);
    --button-shadow-active: 0 2px 0px 0px #0f2440;
}

/* Theme: Retro */
body.theme-retro {
    --bg-app: linear-gradient(135deg, #fefce8 0%, #fef9c3 100%);
    --bg-card: #fffbeb;
    --bg-header: rgba(255, 251, 235, 0.9);
    --bg-button-neutral: #fef9c3;
    --border-button-neutral: #d97706;
    --text-primary: #78350f;
    --text-secondary: #92400e;
    --text-light: #b45309;
    --color-practice: #0277bd;
    --color-practice-light: #e0f2fe;
    --color-beginner: #4d7c0f;
    --color-beginner-light: #ecfccb;
    --color-intermediate: #c2410c;
    --color-intermediate-light: #ffedd5;
    --color-advanced: #dc2626;
    --color-advanced-light: #fee2e2;
    --color-super: #7c2d12;
    --color-super-light: #ffedd5;
    --color-correct: #16a34a;
    --color-correct-light: #dcfce7;
    --color-wrong: #dc2626;
    --color-wrong-light: #fee2e2;
    --color-accent: #ca8a04;
    --color-accent-light: #fef9c3;
    --card-shadow: 0 8px 16px rgba(120, 53, 15, 0.1);
    --button-shadow: 0 6px 0px 0px #d97706, 0 10px 16px rgba(120, 53, 15, 0.1);
    --button-shadow-active: 0 2px 0px 0px #d97706;
}


/* Theme: Summer */
body.theme-summer {
    --bg-app: linear-gradient(135deg, #fef9c3 0%, #e0f2fe 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-button-neutral: #fefce8;
    --border-button-neutral: #fbbf24;
    --text-primary: #1e3a5f;
    --text-secondary: #0369a1;
    --text-light: #0284c7;
    --color-practice: #0277bd;
    --color-practice-light: #e0f2fe;
    --color-beginner: #15803d;
    --color-beginner-light: #dcfce7;
    --color-intermediate: #c2410c;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #ef4444;
    --color-advanced-light: #fee2e2;
    --color-super: #8b5cf6;
    --color-super-light: #ede9fe;
    --color-correct: #22c55e;
    --color-correct-light: #dcfce7;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #0ea5e9;
    --color-accent-light: #e0f2fe;
    --card-shadow: 0 12px 24px -4px rgba(30, 58, 95, 0.08), 0 4px 12px -2px rgba(30, 58, 95, 0.04);
    --button-shadow: 0 6px 0px 0px #fbbf24, 0 10px 16px -2px rgba(30, 58, 95, 0.12);
    --button-shadow-active: 0 2px 0px 0px #fbbf24;
}

/* Theme: Twilight */
body.theme-twilight {
    --bg-app: linear-gradient(135deg, #1a0a2e 0%, #2d1541 50%, #4a1a35 100%);
    --bg-card: #251440;
    --bg-header: rgba(37, 20, 64, 0.9);
    --bg-button-neutral: #321d50;
    --border-button-neutral: #5e3a80;
    --text-primary: #f0d9ff;
    --text-secondary: #c49edb;
    --text-light: #9b72b8;
    --color-practice: #38bdf8;
    --color-practice-light: rgba(56, 189, 248, 0.15);
    --color-beginner: #a78bfa;
    --color-beginner-light: rgba(167, 139, 250, 0.15);
    --color-intermediate: #fb923c;
    --color-intermediate-light: rgba(251, 146, 60, 0.15);
    --color-advanced: #fb7185;
    --color-advanced-light: rgba(251, 113, 133, 0.15);
    --color-super: #e879f9;
    --color-super-light: rgba(232, 121, 249, 0.15);
    --color-correct: #4ade80;
    --color-correct-light: rgba(74, 222, 128, 0.15);
    --color-wrong: #f87171;
    --color-wrong-light: rgba(248, 113, 113, 0.15);
    --color-accent: #c084fc;
    --color-accent-light: rgba(192, 132, 252, 0.15);
    --card-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    --button-shadow: 0 6px 0px 0px #190e30, 0 10px 16px rgba(0, 0, 0, 0.3);
    --button-shadow-active: 0 2px 0px 0px #190e30;
}

/* Theme: Mint */
body.theme-mint {
    --bg-app: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-button-neutral: #ecfdf5;
    --border-button-neutral: #6ee7b7;
    --text-primary: #064e3b;
    --text-secondary: #047857;
    --text-light: #0c8c62;
    --color-practice: #0e7490;
    --color-practice-light: #cffafe;
    --color-beginner: #047857;
    --color-beginner-light: #d1fae5;
    --color-intermediate: #b45309;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #f43f5e;
    --color-advanced-light: #ffe4e6;
    --color-super: #8b5cf6;
    --color-super-light: #ede9fe;
    --color-correct: #10b981;
    --color-correct-light: #d1fae5;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #14b8a6;
    --color-accent-light: #ccfbf1;
    --card-shadow: 0 12px 24px -4px rgba(6, 78, 59, 0.08), 0 4px 12px -2px rgba(6, 78, 59, 0.04);
    --button-shadow: 0 6px 0px 0px #6ee7b7, 0 10px 16px -2px rgba(6, 78, 59, 0.12);
    --button-shadow-active: 0 2px 0px 0px #6ee7b7;
}

/* Theme: Winter */
body.theme-winter {
    --bg-app: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.9);
    --bg-button-neutral: #f0f9ff;
    --border-button-neutral: #bae6fd;
    --text-primary: #0c4a6e;
    --text-secondary: #0369a1;
    --text-light: #0284c7;
    --color-practice: #0277bd;
    --color-practice-light: #e0f2fe;
    --color-beginner: #0e7490;
    --color-beginner-light: #cffafe;
    --color-intermediate: #b45309;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #e11d48;
    --color-advanced-light: #ffe4e6;
    --color-super: #7c3aed;
    --color-super-light: #ede9fe;
    --color-correct: #0d9488;
    --color-correct-light: #ccfbf1;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #0ea5e9;
    --color-accent-light: #e0f2fe;
    --card-shadow: 0 12px 24px -4px rgba(12, 74, 110, 0.06), 0 4px 12px -2px rgba(12, 74, 110, 0.03);
    --button-shadow: 0 6px 0px 0px #bae6fd, 0 10px 16px -2px rgba(12, 74, 110, 0.1);
    --button-shadow-active: 0 2px 0px 0px #bae6fd;
}

/* Theme: Autumn */
body.theme-autumn {
    --bg-app: linear-gradient(135deg, #fef2f2 0%, #fde8e2 100%);
    --bg-card: #fffbf8;
    --bg-header: rgba(255, 251, 248, 0.9);
    --bg-button-neutral: #fef2f2;
    --border-button-neutral: #fca5a5;
    --text-primary: #7f1d1d;
    --text-secondary: #991b1b;
    --text-light: #dc2626;
    --color-practice: #0277bd;
    --color-practice-light: #e0f2fe;
    --color-beginner: #15803d;
    --color-beginner-light: #dcfce7;
    --color-intermediate: #c2410c;
    --color-intermediate-light: #ffedd5;
    --color-advanced: #dc2626;
    --color-advanced-light: #fee2e2;
    --color-super: #9333ea;
    --color-super-light: #f3e8ff;
    --color-correct: #16a34a;
    --color-correct-light: #dcfce7;
    --color-wrong: #dc2626;
    --color-wrong-light: #fee2e2;
    --color-accent: #ea580c;
    --color-accent-light: #ffedd5;
    --card-shadow: 0 12px 24px -4px rgba(127, 29, 29, 0.08), 0 4px 12px -2px rgba(127, 29, 29, 0.04);
    --button-shadow: 0 6px 0px 0px #fca5a5, 0 10px 16px -2px rgba(127, 29, 29, 0.12);
    --button-shadow-active: 0 2px 0px 0px #fca5a5;
}

/* Theme: Coffee */
body.theme-coffee {
    --bg-app: linear-gradient(135deg, #faf6f1 0%, #f0e6d6 100%);
    --bg-card: #fdf8f0;
    --bg-header: rgba(253, 248, 240, 0.9);
    --bg-button-neutral: #f5ede0;
    --border-button-neutral: #c9a96e;
    --text-primary: #3e2723;
    --text-secondary: #5d4037;
    --text-light: #8d6e63;
    --color-practice: #01579b;
    --color-practice-light: #e1f5fe;
    --color-beginner: #33691e;
    --color-beginner-light: #f1f8e9;
    --color-intermediate: #bf360c;
    --color-intermediate-light: #fff3e0;
    --color-advanced: #c62828;
    --color-advanced-light: #ffebee;
    --color-super: #6a1b9a;
    --color-super-light: #f3e5f5;
    --color-correct: #2e7d32;
    --color-correct-light: #e8f5e9;
    --color-wrong: #c62828;
    --color-wrong-light: #ffebee;
    --color-accent: #6d4c41;
    --color-accent-light: #efebe9;
    --card-shadow: 0 12px 24px -4px rgba(62, 39, 35, 0.08), 0 4px 12px -2px rgba(62, 39, 35, 0.04);
    --button-shadow: 0 6px 0px 0px #c9a96e, 0 10px 16px -2px rgba(62, 39, 35, 0.12);
    --button-shadow-active: 0 2px 0px 0px #c9a96e;
}


/* Theme: Lavender */
body.theme-lavender {
    --bg-app: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-button-neutral: #faf5ff;
    --border-button-neutral: #d8b4fe;
    --text-primary: #581c87;
    --text-secondary: #7e22ce;
    --text-light: #7e3ab5;
    --color-practice: #0e7490;
    --color-practice-light: #cffafe;
    --color-beginner: #6d28d9;
    --color-beginner-light: #ede9fe;
    --color-intermediate: #b45309;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #ec4899;
    --color-advanced-light: #fce7f3;
    --color-super: #7c3aed;
    --color-super-light: #ede9fe;
    --color-correct: #8b5cf6;
    --color-correct-light: #ede9fe;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #a855f7;
    --color-accent-light: #f3e8ff;
    --card-shadow: 0 12px 24px -4px rgba(88, 28, 135, 0.08), 0 4px 12px -2px rgba(88, 28, 135, 0.04);
    --button-shadow: 0 6px 0px 0px #d8b4fe, 0 10px 16px -2px rgba(88, 28, 135, 0.12);
    --button-shadow-active: 0 2px 0px 0px #d8b4fe;
}

/* Theme: Slate */
body.theme-slate {
    --bg-app: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-button-neutral: #f1f5f9;
    --border-button-neutral: #94a3b8;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-light: #64748b;
    --color-practice: #0277bd;
    --color-practice-light: #e0f2fe;
    --color-beginner: #15803d;
    --color-beginner-light: #dcfce7;
    --color-intermediate: #b45309;
    --color-intermediate-light: #fef3c7;
    --color-advanced: #ef4444;
    --color-advanced-light: #fee2e2;
    --color-super: #8b5cf6;
    --color-super-light: #ede9fe;
    --color-correct: #22c55e;
    --color-correct-light: #dcfce7;
    --color-wrong: #ef4444;
    --color-wrong-light: #fee2e2;
    --color-accent: #6366f1;
    --color-accent-light: #eef2ff;
    --card-shadow: 0 12px 24px -4px rgba(15, 23, 42, 0.06), 0 4px 12px -2px rgba(15, 23, 42, 0.03);
    --button-shadow: 0 6px 0px 0px #94a3b8, 0 10px 16px -2px rgba(15, 23, 42, 0.1);
    --button-shadow-active: 0 2px 0px 0px #94a3b8;
}

/* --------------------------------------------------------------------------
   2. RESET & BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

body {
    font-family: var(--font-jp);
    background: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
    transition: background var(--transition-normal), color var(--transition-normal);
}

.app-container {
    width: 100%;
    max-width: 680px;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 0 16px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
}

.font-outfit {
    font-family: var(--font-en);
}

.ruby {
    font-size: 0.45em;
    font-weight: 400;
    opacity: 0.85;
    display: inline-block;
    vertical-align: super;
    margin-left: 2px;
}

/* --------------------------------------------------------------------------
   3. HEADER & FOOTER
   -------------------------------------------------------------------------- */
.app-header {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background var(--transition-normal);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.logo-emoji {
    font-size: 28px;
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    background: linear-gradient(45deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.theme-contrast .logo-text {
    -webkit-text-fill-color: #ffffff;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bp-display {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-button-neutral);
    border: 2px solid var(--border-button-neutral);
    border-radius: 20px;
    padding: 4px 12px 4px 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.bp-display:hover {
    transform: translateY(-2px);
}

.bp-display:active {
    transform: translateY(1px);
}

.bp-icon {
    font-size: 16px;
}

.bp-count {
    font-size: 16px;
    font-weight: 800;
}

.bp-label-text {
    font-size: 11px;
    color: var(--text-light);
}

.app-footer {
    padding: 24px 16px;
    text-align: center;
    margin-top: auto;
}

.footer-text {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.footer-nav-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--bg-button-neutral);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.footer-nav-link:hover {
    background: var(--border-button-neutral);
    color: var(--text-primary);
}

.footer-nav-link.active {
    color: var(--text-primary);
    background: var(--border-button-neutral);
}

/* --------------------------------------------------------------------------
   4. BUTTONS
   -------------------------------------------------------------------------- */
button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    outline: none;
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    border: 2px solid var(--border-button-neutral);
    font-size: 18px;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.icon-btn:hover {
    transform: translateY(-2px);
    background: var(--bg-button-neutral);
}

.icon-btn:active {
    transform: translateY(1px);
}

.text-btn {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.text-btn:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.04);
}

body.theme-dark .text-btn:hover,
body.theme-ocean .text-btn:hover,
body.theme-twilight .text-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}

.primary-btn {
    background: var(--color-beginner);
    color: var(--bg-card);
    font-size: 20px;
    font-weight: 700;
    padding: 16px 36px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--button-shadow);
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    text-align: center;
    width: 100%;
}

.primary-btn:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
}

.primary-btn:active {
    transform: translateY(4px);
    box-shadow: var(--button-shadow-active);
}

.secondary-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    padding: 16px 36px;
    border-radius: var(--border-radius-md);
    border: 2px solid var(--border-button-neutral);
    box-shadow: var(--button-shadow);
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    text-align: center;
    width: 100%;
}

.secondary-btn:hover {
    background: var(--bg-button-neutral);
    transform: translateY(-2px);
}

.secondary-btn:active {
    transform: translateY(4px);
    box-shadow: var(--button-shadow-active);
}

/* --------------------------------------------------------------------------
   5. VIEWS & TRANSITIONS
   -------------------------------------------------------------------------- */
.view-section {
    display: none;
    flex-direction: column;
    animation: fadeIn var(--transition-normal) forwards;
}

.view-section.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-shadow {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--card-shadow);
    padding: 24px;
    border: 2px solid var(--border-button-neutral);
    transition: background var(--transition-normal), border var(--transition-normal);
}

/* --------------------------------------------------------------------------
   6. TITLE SCREEN
   -------------------------------------------------------------------------- */
/* Streak Banner */
.streak-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: linear-gradient(90deg, #ff6b35, #f7c948);
    border-radius: var(--border-radius-md);
    margin-bottom: 16px;
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    animation: streakPulse 2s infinite;
}

@keyframes streakPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }
}

.streak-fire {
    font-size: 24px;
}

/* Hero */
.hero-section {
    text-align: center;
    margin-bottom: 20px;
}

.logo-badge {
    display: inline-block;
    background: var(--color-beginner-light);
    color: var(--color-beginner);
    font-size: 14px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.logo-badge .badge-free {
    color: var(--color-advanced);
    font-weight: 900;
    margin-right: 2px;
}

.main-title {
    font-size: 48px;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -1px;
    margin-bottom: 6px;
    text-shadow: 0 4px 12px rgba(43, 76, 63, 0.06);
}

.main-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Daily Mission Banner */
.daily-mission-banner {
    margin-bottom: 20px;
    padding: 20px;
    background: linear-gradient(135deg, var(--color-accent-light), var(--bg-card));
}

.daily-mission-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.daily-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.daily-info {
    flex-grow: 1;
}

.daily-title {
    font-size: 18px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.daily-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.daily-play-btn {
    background: var(--color-accent);
    color: var(--bg-card);
    font-weight: 700;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--button-shadow);
    flex-shrink: 0;
}

.daily-play-btn:active {
    transform: translateY(3px);
    box-shadow: var(--button-shadow-active);
}

.daily-completed {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-correct);
}

.daily-check {
    font-size: 20px;
}

/* Calendar */
.calendar-caption {
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 8px;
    line-height: 1.5;
    font-weight: 700;
}

.calendar-container {
    margin-bottom: 20px;
    padding: 16px;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.calendar-month {
    font-size: 16px;
    font-weight: 700;
}

.calendar-nav-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-button-neutral);
    border: 2px solid var(--border-button-neutral);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.calendar-nav-btn:active {
    transform: scale(0.9);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    text-align: center;
}

.calendar-day-name {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-light);
    padding: 4px 0;
}

.calendar-cell {
    position: relative;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.calendar-cell.empty {
    visibility: hidden;
}

.calendar-cell.today {
    background: var(--color-accent-light);
    font-weight: 700;
    color: var(--color-accent);
}

.calendar-date {
    font-size: 13px;
    line-height: 1;
}

.calendar-stamp {
    font-size: 14px;
    line-height: 1;
    margin-top: 1px;
    animation: stampPop 0.4s ease-out;
}

@keyframes stampPop {
    0% {
        transform: scale(0);
    }

    60% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(1);
    }
}

/* Section Title */
.section-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Mode Cards */
.mode-select-container {
    margin-bottom: 24px;
}

.mode-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mode-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border-radius: var(--border-radius-lg);
    background: var(--bg-card);
    border: 3px solid var(--border-button-neutral);
    box-shadow: var(--button-shadow);
    text-align: left;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
}

.mode-card.practice::before {
    background: var(--color-practice);
}

.mode-card.beginner::before {
    background: var(--color-beginner);
}

.mode-card.intermediate::before {
    background: var(--color-intermediate);
}

.mode-card.advanced::before {
    background: var(--color-advanced);
}

.mode-card.super::before {
    background: var(--color-super);
}

.mode-card:hover {
    transform: translateY(-4px) scale(1.02);
}

.mode-card:active {
    transform: translateY(4px);
    box-shadow: var(--button-shadow-active);
}

.mode-icon {
    font-size: 36px;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-button-neutral);
    flex-shrink: 0;
}

.mode-card.practice .mode-icon {
    background: var(--color-practice-light);
}

.mode-card.beginner .mode-icon {
    background: var(--color-beginner-light);
}

.mode-card.intermediate .mode-icon {
    background: var(--color-intermediate-light);
}

.mode-card.advanced .mode-icon {
    background: var(--color-advanced-light);
}

.mode-card.super .mode-icon {
    background: var(--color-super-light);
}

.mode-details {
    flex-grow: 1;
}

.mode-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mode-card.practice .mode-name { color: var(--color-practice); }
.mode-card.beginner .mode-name { color: var(--color-beginner); }
.mode-card.intermediate .mode-name { color: var(--color-intermediate); }
.mode-card.advanced .mode-name { color: var(--color-advanced); }
.mode-card.super .mode-name { color: var(--color-super); }

.mode-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Stats Tabs */
.stats-container {
    margin-bottom: 20px;
}

.stats-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.stats-tab {
    flex: 1;
    padding: 10px;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 15px;
    color: var(--text-light);
    background: var(--bg-button-neutral);
    border: 2px solid transparent;
    transition: var(--transition-fast);
}

.stats-tab.active {
    color: var(--text-primary);
    background: var(--bg-card);
    border-color: var(--color-beginner);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.06);
}

.stats-panel canvas {
    width: 100%;
    border-radius: var(--border-radius-sm);
}

.graph-legend {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    width: 12px;
    height: 4px;
    border-radius: 2px;
    display: inline-block;
}

.legend-dot.accuracy {
    background: var(--color-beginner);
}

.legend-dot.brain-age {
    background: var(--color-advanced);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-button-neutral);
    padding: 14px 8px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-button-neutral);
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-align: center;
}

.stat-value {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-unit {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 2px;
}

.brain-age-stat .stat-value {
    color: var(--color-advanced);
}

/* Nav buttons (Shop/Achievements) */
.home-nav-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.nav-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 16px;
    border-radius: var(--border-radius-lg);
    background: var(--bg-card);
    border: 3px solid var(--border-button-neutral);
    box-shadow: var(--button-shadow);
    transition: var(--transition-bounce);
}

.nav-card:hover {
    transform: translateY(-4px);
}

.nav-card:active {
    transform: translateY(4px);
    box-shadow: var(--button-shadow-active);
}

.nav-icon {
    font-size: 32px;
}

.nav-label {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. GAME SCREEN
   -------------------------------------------------------------------------- */
.game-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.game-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mode-badge-small {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 12px;
}

.mode-badge-small.practice {
    background: var(--color-practice-light);
    color: var(--color-practice);
}

.mode-badge-small.beginner {
    background: var(--color-beginner-light);
    color: var(--color-beginner);
}

.mode-badge-small.intermediate {
    background: var(--color-intermediate-light);
    color: var(--color-intermediate);
}

.mode-badge-small.advanced {
    background: var(--color-advanced-light);
    color: var(--color-advanced);
}

.mode-badge-small.super {
    background: var(--color-super-light);
    color: var(--color-super);
}

.round-counter {
    font-size: 16px;
    font-weight: 700;
}

.highlight-num {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-beginner);
}

/* Arena & Card Flip */
.game-arena {
    perspective: 1000px;
    width: 100%;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.card-wrapper {
    position: relative;
    width: 100%;
    max-width: 380px;
    height: 280px;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-wrapper.flipped {
    transform: rotateY(180deg);
}

.memory-card-front,
.memory-card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.memory-card-back {
    transform: rotateY(180deg);
    background: var(--bg-button-neutral);
    border: 4px dashed var(--text-light);
}

/* Countdown Bar */
.countdown-bar-container {
    position: absolute;
    top: 12px;
    left: 16px;
    right: 16px;
    height: 8px;
    background: var(--bg-button-neutral);
    overflow: hidden;
    border-radius: 4px;
    z-index: 10;
}

.countdown-bar {
    height: 100%;
    background: var(--color-beginner);
    width: 100%;
    transform-origin: left;
    transition: transform var(--transition-fast);
    border-radius: 4px;
}

/* Card Content */
.card-content-area {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.target-container {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-height: 150px;
}

.target-svg-wrapper {
    width: 120px;
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform var(--transition-bounce);
}

.target-svg-wrapper svg {
    width: 100%;
    height: 100%;
}

.target-text {
    font-size: 72px;
    font-weight: 900;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phase-indicator {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 12px;
    background: var(--bg-button-neutral);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

/* Question Phase */
.question-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    margin-bottom: 20px;
}

.question-mark-icon {
    font-size: 32px;
    animation: float 2s infinite ease-in-out;
}

.question-prompt-text {
    font-size: 22px;
    font-weight: 900;
    color: var(--text-primary);
}

.question-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-light);
}

.queue-container {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 4px;
}

.queue-item-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.queue-box {
    width: 72px;
    height: 72px;
    border: 3px solid var(--border-button-neutral);
    border-radius: 14px;
    background: var(--bg-card);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.queue-box .blurred-target {
    filter: blur(6px) opacity(0.5);
    transform: scale(0.85);
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
}

.queue-box .blurred-target.heavy-blur {
    filter: blur(10px) grayscale(100%) opacity(0.35);
}

.queue-box .target-text {
    font-size: 44px;
}

.queue-box .target-svg-wrapper {
    width: 50px;
    height: 50px;
}

.queue-arrow-container {
    margin-top: 8px;
    position: relative;
    display: flex;
    justify-content: center;
    width: 100%;
    height: 28px;
}

.queue-arrow-text {
    position: absolute;
    left: calc(50% + 14px);
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-advanced);
}

.brain-thinking-icon {
    font-size: 48px;
    animation: rotateSlow 4s infinite linear;
}

.thinking-text {
    font-size: 15px;
    font-weight: 700;
    margin-top: 8px;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-8px);
    }

    100% {
        transform: translateY(0px);
    }
}

@keyframes rotateSlow {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Choices */
.choices-container {
    width: 100%;
}

#game-memorized-btn {
    display: flex;
    max-width: 280px;
    margin: 16px auto;
}

.choices-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.choice-btn {
    position: relative;
    height: 120px;
    border-radius: var(--border-radius-lg);
    background: var(--bg-card);
    border: 3px solid var(--border-button-neutral);
    box-shadow: var(--button-shadow);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition-bounce);
    overflow: hidden;
    padding: 12px;
}

.choice-btn:hover {
    transform: translateY(-4px);
    background: var(--bg-button-neutral);
}

.choice-btn:active {
    transform: translateY(4px);
    box-shadow: var(--button-shadow-active);
}

.choice-content {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.choice-content .target-svg-wrapper {
    width: 76px;
    height: 76px;
}

.choice-content .target-text {
    font-size: 40px;
}

.choice-num-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--text-primary);
    color: var(--bg-card);
    font-family: var(--font-en);
    font-weight: 700;
    font-size: 14px;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.95;
}

/* --------------------------------------------------------------------------
   8. FEEDBACK OVERLAY
   -------------------------------------------------------------------------- */
.feedback-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3000;
    display: none;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    pointer-events: none;
}

.feedback-overlay.active {
    display: flex;
    animation: bgFlash 0.5s ease-out forwards;
}

body.modal-open .feedback-overlay {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.8);
}

.feedback-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.15);
    padding: 32px 48px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    transform: scale(0.7);
    opacity: 0;
    border: 4px solid var(--border-button-neutral);
}

.feedback-overlay.active .feedback-content {
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.feedback-overlay.correct .feedback-content {
    border-color: var(--color-correct);
}

.feedback-overlay.wrong .feedback-content {
    border-color: var(--color-wrong);
}

.feedback-symbol {
    font-size: 84px;
    line-height: 1;
}

.feedback-text {
    font-size: 28px;
    font-weight: 900;
}

.feedback-overlay.correct .feedback-text {
    color: var(--color-correct);
}

.feedback-overlay.wrong .feedback-text {
    color: var(--color-wrong);
}

@keyframes bgFlash {
    0% {
        background-color: rgba(255, 255, 255, 0);
    }

    30% {
        background-color: rgba(255, 255, 255, 0.5);
    }

    100% {
        background-color: rgba(255, 255, 255, 0.2);
    }
}

@keyframes popIn {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* --------------------------------------------------------------------------
   9. RESULT SCREEN
   -------------------------------------------------------------------------- */
.result-header {
    text-align: center;
    margin-bottom: 24px;
}

.celebration-emoji {
    font-size: 64px;
    animation: float 2.5s infinite ease-in-out;
}

.result-title {
    font-size: 32px;
    font-weight: 900;
    margin-bottom: 6px;
}

.result-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.result-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

@media (max-width: 580px) {
    .result-layout {
        grid-template-columns: 1fr;
    }
}

.result-score-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.accuracy-circle-container {
    position: relative;
    width: 180px;
    height: 180px;
    margin-bottom: 12px;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring__circle-bg {
    stroke: var(--bg-button-neutral);
}

.progress-ring__circle {
    stroke: var(--color-beginner);
    stroke-dasharray: 465;
    stroke-dashoffset: 465;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

.score-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-num {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.score-denominator {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 2px;
}

.score-label {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.accuracy-percentage {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-beginner);
}

.result-details-card .card-title {
    font-size: 18px;
    margin-bottom: 16px;
    border-bottom: 2px solid var(--border-button-neutral);
    padding-bottom: 8px;
}

.detail-rows {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.row-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.row-value {
    font-size: 18px;
    font-weight: 700;
}

.badge-style {
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--bg-button-neutral);
    font-size: 13px;
    border: 1px solid var(--border-button-neutral);
}

.highlight-rank {
    color: var(--color-advanced);
    font-size: 20px;
    font-weight: 900;
}

.brain-age-result {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-accent);
}

.bp-earned {
    color: var(--color-intermediate);
    font-weight: 800;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* --------------------------------------------------------------------------
   10. SHOP SCREEN
   -------------------------------------------------------------------------- */
.sub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.sub-page-title {
    font-size: 28px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 24px;
}

.shop-description {
    background: var(--bg-card);
    border: 2px dashed var(--border-button-neutral);
    border-radius: var(--border-radius-md);
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    text-align: center;
}

.shop-bp-display-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    background: var(--bg-card);
    border: 2px solid var(--border-button-neutral);
    border-radius: var(--border-radius-lg);
    padding: 10px 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.shop-bp-label {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-secondary);
}

.shop-bp-value-box {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 20px;
    font-weight: 900;
    color: var(--text-primary);
}

.shop-bp-value-box .bp-icon {
    font-size: 20px;
}

.shop-bp-value-box .bp-count {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-intermediate);
}

.shop-bp-value-box .bp-label-text {
    font-size: 14px;
    color: var(--text-light);
    margin-left: 2px;
}

.shop-section-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    padding-left: 4px;
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 24px;
}

.shop-item {
    border-radius: var(--border-radius-md);
    background: var(--bg-card);
    border: 3px solid var(--border-button-neutral);
    padding: 16px;
    text-align: center;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.shop-item:hover {
    transform: translateY(-2px);
}

.shop-item:active {
    transform: translateY(2px);
}

.shop-item.locked {
    opacity: 0.7;
}

.shop-item.locked::after {
    content: '🔒';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 16px;
}

.shop-item.active-item {
    border-color: var(--color-beginner);
    box-shadow: 0 0 0 3px var(--color-beginner-light);
}

.shop-item-icon {
    font-size: 36px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.shop-item-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.shop-item-price {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-intermediate);
}

.shop-item-owned {
    font-size: 12px;
    color: var(--color-beginner);
    font-weight: 700;
}

/* --------------------------------------------------------------------------
   11. ACHIEVEMENTS SCREEN
   -------------------------------------------------------------------------- */
.badges-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

@media (max-width: 480px) {
    .badges-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.badge-card {
    border-radius: var(--border-radius-md);
    background: var(--bg-card);
    border: 2px solid var(--border-button-neutral);
    padding: 16px 12px;
    text-align: center;
    transition: var(--transition-fast);
}

.badge-card.earned {
    border-color: var(--color-intermediate);
    background: var(--color-intermediate-light);
}

.badge-card.unearned {
    opacity: 0.5;
    filter: grayscale(0.6);
}

.badge-icon {
    font-size: 36px;
    margin-bottom: 6px;
}

.badge-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.badge-desc {
    font-size: 11px;
    color: var(--text-light);
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   12. MODAL OVERLAYS
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity var(--transition-normal);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: 90%;
    max-width: 400px;
    max-height: 85vh;
    max-height: 85dvh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-title {
    font-size: 20px;
    text-align: center;
    border-bottom: 2px solid var(--border-button-neutral);
    padding-bottom: 8px;
}

.modal-desc {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
}

/* Theme Options */
.theme-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.theme-opt-btn {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    background: var(--bg-button-neutral);
    border: 2px solid var(--border-button-neutral);
    text-align: left;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition-fast);
}

.theme-opt-btn:hover {
    transform: translateX(4px);
    background: var(--bg-card);
}

.theme-opt-btn.active {
    border-color: var(--color-beginner);
    background: var(--bg-card);
}

.theme-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: inline-block;
    border: 2px solid rgba(0, 0, 0, 0.2);
}

.theme-opt-btn.pastel .theme-dot {
    background: #4caf50;
}

.theme-opt-btn.dark .theme-dot {
    background: #25332c;
}

.theme-opt-btn.contrast .theme-dot {
    background: #000000;
    border-color: #ffffff;
}

.theme-opt-btn.sakura .theme-dot {
    background: #ec4899;
}

.theme-opt-btn.ocean .theme-dot {
    background: #0284c7;
}

.theme-opt-btn.retro .theme-dot {
    background: #d97706;
}

/* Settings */
.settings-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting-label {
    font-size: 16px;
    font-weight: 700;
}

.setting-select {
    font-family: var(--font-jp);
    font-size: 15px;
    padding: 6px 12px;
    border-radius: 8px;
    border: 2px solid var(--border-button-neutral);
    background: var(--bg-button-neutral);
    color: var(--text-primary);
}

.setting-divider {
    border: none;
    border-top: 2px solid var(--border-button-neutral);
    margin: 4px 0;
}

.setting-section-title {
    font-size: 16px;
    font-weight: 700;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--text-light);
    border-radius: 28px;
    transition: var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.toggle-switch input:checked+.toggle-slider {
    background: var(--color-beginner);
}

.toggle-switch input:checked+.toggle-slider::before {
    transform: translateX(24px);
}

/* Transfer */
.transfer-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.transfer-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--border-radius-md);
    background: var(--bg-button-neutral);
    border: 2px solid var(--border-button-neutral);
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    transition: var(--transition-fast);
    width: 100%;
    text-align: left;
}

.transfer-btn:hover {
    background: var(--bg-card);
    transform: translateX(4px);
}

.transfer-icon {
    font-size: 24px;
}

.transfer-textarea {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border-button-neutral);
    background: var(--bg-button-neutral);
    color: var(--text-primary);
    font-family: var(--font-en);
    font-size: 12px;
    resize: vertical;
    word-break: break-all;
}

/* Confirm Modal */
.confirm-modal {
    text-align: center;
}

.confirm-message {
    font-size: 18px;
    font-weight: 700;
}

.confirm-buttons {
    display: flex;
    gap: 12px;
}

.confirm-buttons .primary-btn,
.confirm-buttons .secondary-btn {
    font-size: 18px;
    padding: 14px;
}

/* Badge Earned Modal */
.badge-earned-modal {
    text-align: center;
    animation: badgeEarnedBounce 0.6s ease-out;
}

.badge-earned-icon {
    font-size: 72px;
    animation: badgeShine 1.5s ease-in-out infinite;
}

@keyframes badgeShine {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
    }

    25% {
        transform: scale(1.1) rotate(-5deg);
    }

    75% {
        transform: scale(1.1) rotate(5deg);
    }
}

@keyframes badgeEarnedBounce {
    0% {
        transform: scale(0.3) translateY(40px);
        opacity: 0;
    }

    60% {
        transform: scale(1.1) translateY(-10px);
        opacity: 1;
    }

    100% {
        transform: scale(1) translateY(0);
    }
}

.badge-earned-title {
    font-size: 24px;
    font-weight: 900;
    color: var(--color-intermediate);
}

.badge-earned-name {
    font-size: 18px;
    font-weight: 700;
}

.badge-earned-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   13. CONFETTI & TRICK FILTERS
   -------------------------------------------------------------------------- */
.confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.trick-grayscale {
    filter: grayscale(1) !important;
}

.trick-sepia {
    filter: sepia(0.85) contrast(1.1) !important;
}

.trick-invert {
    filter: invert(0.85) !important;
}

/* --------------------------------------------------------------------------
   14. RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .app-header {
        padding: 0 10px;
    }

    .header-controls {
        gap: 4px;
    }

    .icon-btn {
        width: 38px;
        height: 38px;
        font-size: 16px;
    }

    .bp-display {
        padding: 3px 8px 3px 6px;
        font-size: 12px;
    }

    .main-title {
        font-size: 36px;
    }

    .mode-card {
        padding: 14px;
        gap: 14px;
    }

    .mode-icon {
        width: 50px;
        height: 50px;
        font-size: 28px;
    }

    .mode-name {
        font-size: 18px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-layout {
        grid-template-columns: 1fr;
    }

    .shop-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .daily-mission-content {
        flex-wrap: wrap;
    }

    .daily-play-btn {
        width: 100%;
        text-align: center;
    }
}

/* --------------------------------------------------------------------------
   15. TUTORIAL
   -------------------------------------------------------------------------- */

/* 3-column nav for home */
.home-nav-4col {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

@media (max-width: 480px) {
    .home-nav-4col {
        grid-template-columns: 1fr 1fr;
    }

    .home-nav-4col .nav-card {
        padding: 14px 8px;
    }

    .home-nav-4col .nav-icon {
        font-size: 26px;
    }

    .home-nav-4col .nav-label {
        font-size: 13px;
    }
}

/* --- ABOUT SCREEN --- */
.about-card {
    margin-bottom: 24px;
    padding: 24px;
}

.about-section-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    border-bottom: 2px dashed var(--border-button-neutral);
    padding-bottom: 8px;
}

.about-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.install-guide {
    background: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--border-button-neutral);
}

.install-os-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.install-step {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.install-step:last-child {
    margin-bottom: 0;
}

/* .tutorial-nav-card removed */

/* Overlay */
.tutorial-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.4s ease;
}

.tutorial-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.tutorial-container {
    width: 92%;
    max-width: 480px;
    max-height: 92vh;
    max-height: 92dvh;
    position: relative;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
}

/* Header */
.tutorial-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 12px 8px;
}

.tutorial-sound-btn {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.2s ease;
    z-index: 11;
    flex-shrink: 0;
}

.tutorial-sound-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* Step dots */
.tutorial-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 0;
    z-index: 10;
    flex-grow: 1;
}

.tutorial-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: all 0.4s ease;
    display: inline-block;
}

.tutorial-dot.active {
    background: #ffffff;
    transform: scale(1.3);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.6);
}

.tutorial-dot.completed {
    background: var(--color-correct);
}

/* Skip button */
.tutorial-skip-btn {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.2s ease;
    z-index: 11;
    flex-shrink: 0;
}

.tutorial-skip-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* Steps */
.tutorial-step {
    display: none;
    animation: tutorialFadeIn 0.5s ease forwards;
}

.tutorial-step.active {
    display: block;
}

@keyframes tutorialFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === STEP 0: Welcome === */
.tutorial-welcome {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.tutorial-welcome-emoji {
    font-size: 80px;
    margin-bottom: 16px;
    animation: tutorialBounce 2s infinite ease-in-out;
}

@keyframes tutorialBounce {

    0%,
    100% {
        transform: translateY(0) scale(1);
    }

    50% {
        transform: translateY(-16px) scale(1.1);
    }
}

.tutorial-welcome-title {
    font-size: 32px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.tutorial-welcome-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.tutorial-welcome-sparkles {
    font-size: 28px;
    margin-bottom: 28px;
    display: flex;
    justify-content: center;
    gap: 16px;
    animation: sparkleFloat 3s infinite ease-in-out;
}

@keyframes sparkleFloat {

    0%,
    100% {
        transform: translateY(0);
    }

    33% {
        transform: translateY(-8px);
    }

    66% {
        transform: translateY(4px);
    }
}

.tutorial-next-btn {
    max-width: 320px;
    margin: 0 auto;
}

.tutorial-back-btn {
    max-width: 160px;
}

/* === STEP 1: Rules === */
.tutorial-rules {
    padding: 28px 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.tutorial-rules-title {
    font-size: 26px;
    font-weight: 900;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 24px;
}

.tutorial-rules-cards {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.tutorial-rule-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    width: 100%;
    background: var(--bg-button-neutral);
    border-radius: var(--border-radius-md);
    border: 2px solid var(--border-button-neutral);
    transition: all 0.3s ease;
    animation: ruleSlideIn 0.5s ease forwards;
    opacity: 0;
}

.tutorial-rule-card:nth-child(1) {
    animation-delay: 0.1s;
}

.tutorial-rule-card:nth-child(3) {
    animation-delay: 0.3s;
}

.tutorial-rule-card:nth-child(5) {
    animation-delay: 0.5s;
}

@keyframes ruleSlideIn {
    from {
        opacity: 0;
        transform: translateX(-24px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.tutorial-rule-card.highlight-rule {
    background: var(--color-accent-light);
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.15);
}

.tutorial-rule-num {
    font-size: 22px;
    font-weight: 900;
    flex-shrink: 0;
    width: 36px;
    text-align: center;
    color: var(--color-accent);
}

.tutorial-rule-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.tutorial-rule-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tutorial-rule-text strong {
    font-size: 17px;
    font-weight: 900;
    color: var(--text-primary);
}

.tutorial-rule-text span {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tutorial-rule-text em {
    color: var(--color-accent);
    font-style: normal;
    font-weight: 700;
}

.tutorial-rule-arrow {
    font-size: 20px;
    text-align: center;
    opacity: 0.5;
    animation: arrowBounce 1.5s infinite;
}

@keyframes arrowBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(4px);
    }
}

.tutorial-rules-footer {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: center;
    align-items: center;
}

.tutorial-rules-footer .secondary-btn {
    font-size: 16px;
    padding: 12px 20px;
}

.tutorial-rules-footer .primary-btn {
    font-size: 18px;
    padding: 14px 28px;
}

/* === STEP 2: Demo Play === */
.tutorial-demo {
    padding: 20px 16px;
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.tutorial-demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.tutorial-demo-title {
    font-size: 18px;
    font-weight: 900;
    color: var(--text-primary);
}

.tutorial-demo-progress {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-secondary);
}

/* Guide bubble */
.tutorial-guide-bubble {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #fff9c4, #fff176);
    border-radius: var(--border-radius-md);
    border: 2px solid #f9a825;
    box-shadow: 0 4px 16px rgba(249, 168, 37, 0.2);
    animation: bubblePulse 2s infinite ease-in-out;
    position: relative;
}

body.theme-dark .tutorial-guide-bubble,
body.theme-ocean .tutorial-guide-bubble,
body.theme-twilight .tutorial-guide-bubble {
    background: linear-gradient(135deg, #4a3f00, #5d4e00);
    border-color: #f9a825;
}

body.theme-dark .tutorial-guide-text,
body.theme-ocean .tutorial-guide-text,
body.theme-twilight .tutorial-guide-text {
    color: #fff9c4;
}

@keyframes bubblePulse {

    0%,
    100% {
        box-shadow: 0 4px 16px rgba(249, 168, 37, 0.2);
    }

    50% {
        box-shadow: 0 4px 24px rgba(249, 168, 37, 0.4);
    }
}

.tutorial-guide-bubble::before {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 32px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid #f9a825;
    z-index: 1;
}

.tutorial-guide-bubble::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 32px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid #fff176;
    z-index: 2;
}

body.theme-dark .tutorial-guide-bubble::after,
body.theme-ocean .tutorial-guide-bubble::after,
body.theme-twilight .tutorial-guide-bubble::after {
    border-top-color: #5d4e00;
}

.tutorial-guide-avatar {
    font-size: 32px;
    flex-shrink: 0;
}

.tutorial-guide-text {
    font-size: 17px;
    font-weight: 700;
    color: #5d4037;
    line-height: 1.5;
}

/* Demo arena */
.tutorial-demo-arena {
    perspective: 1000px;
    width: 100%;
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.tutorial-demo-arena .card-wrapper {
    max-width: 340px;
    height: 240px;
}

/* Demo choices */
.tutorial-demo-choices {
    margin-top: 8px;
}

.tutorial-demo-choices .choices-grid {
    gap: 10px;
}

.tutorial-demo-choices .choice-btn {
    height: 100px;
}

/* Hint pulse on correct answer */
.choice-btn.tutorial-hint {
    animation: hintPulse 1.2s infinite ease-in-out;
    border-color: var(--color-correct) !important;
    box-shadow: 0 0 0 4px var(--color-correct-light), var(--button-shadow) !important;
    position: relative;
}

@keyframes hintPulse {

    0%,
    100% {
        box-shadow: 0 0 0 4px var(--color-correct-light), var(--button-shadow);
    }

    50% {
        box-shadow: 0 0 0 8px var(--color-correct-light), 0 0 24px rgba(46, 204, 113, 0.3);
    }
}

.choice-btn.tutorial-hint::after {
    content: '👈 ここ！';
    position: absolute;
    top: -32px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-correct);
    color: var(--bg-card);
    font-size: 13px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 12px;
    white-space: nowrap;
    animation: hintLabelBounce 1s infinite;
}

@keyframes hintLabelBounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(-6px);
    }
}

/* === STEP 3: Complete === */
.tutorial-complete {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.tutorial-complete-emoji {
    font-size: 80px;
    margin-bottom: 16px;
    animation: completeCelebrate 1s ease-out;
}

@keyframes completeCelebrate {
    0% {
        transform: scale(0) rotate(-20deg);
        opacity: 0;
    }

    60% {
        transform: scale(1.2) rotate(5deg);
        opacity: 1;
    }

    100% {
        transform: scale(1) rotate(0deg);
    }
}

.tutorial-complete-title {
    font-size: 34px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.tutorial-complete-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.tutorial-complete-tips {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
    text-align: left;
}

.tutorial-tip {
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    background: var(--bg-button-neutral);
    border: 1px solid var(--border-button-neutral);
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.5;
}

.tutorial-tip strong {
    color: var(--color-accent);
}

.tutorial-complete-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    max-width: 320px;
    margin: 0 auto;
}

.tutorial-complete-actions button {
    width: 100%;
}

/* Tutorial responsive */
@media (max-width: 480px),
(max-height: 720px) {

    .tutorial-welcome-emoji,
    .tutorial-complete-emoji {
        font-size: 60px;
        margin-bottom: 12px;
    }

    .tutorial-welcome-title,
    .tutorial-complete-title {
        font-size: 26px;
        margin-bottom: 10px;
    }

    .tutorial-welcome-desc,
    .tutorial-complete-desc {
        font-size: 16px;
        margin-bottom: 16px;
    }

    .tutorial-welcome-sparkles {
        margin-bottom: 20px;
    }

    .tutorial-rules-title {
        font-size: 22px;
        margin-bottom: 16px;
    }

    .tutorial-rule-card {
        padding: 12px 14px;
        gap: 10px;
    }

    .tutorial-rule-icon {
        font-size: 26px;
    }

    .tutorial-rule-text strong {
        font-size: 15px;
    }

    .tutorial-guide-text {
        font-size: 15px;
    }

    .tutorial-guide-bubble {
        padding: 10px 14px;
        margin-bottom: 10px;
    }

    .tutorial-demo {
        padding: 16px 12px;
    }

    .tutorial-demo-arena .card-wrapper {
        height: 210px;
    }

    .tutorial-demo-choices .choices-grid {
        gap: 16px;
    }

    .tutorial-demo-choices .choice-btn {
        height: 78px;
    }

    .tutorial-memorize-action {
        margin: 12px 0 6px;
    }

    .tutorial-memorized-btn {
        padding: 12px 24px !important;
        font-size: 16px !important;
    }
}

@media (max-height: 600px) {
    .tutorial-demo-arena .card-wrapper {
        height: 170px;
    }

    .tutorial-demo-choices .choices-grid {
        gap: 12px;
    }

    .tutorial-demo-choices .choice-btn {
        height: 62px;
    }

    .tutorial-memorize-action {
        margin: 8px 0 4px;
    }

    .tutorial-memorized-btn {
        padding: 10px 20px !important;
        font-size: 16px !important;
    }

    .tutorial-welcome {
        padding: 20px 16px;
    }

    .tutorial-welcome-emoji,
    .tutorial-complete-emoji {
        font-size: 48px;
        margin-bottom: 8px;
    }

    .tutorial-welcome-title,
    .tutorial-complete-title {
        font-size: 24px;
        margin-bottom: 8px;
    }

    .tutorial-welcome-desc,
    .tutorial-complete-desc {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .tutorial-welcome-sparkles {
        margin-bottom: 16px;
    }

    .tutorial-rules {
        padding: 16px 12px;
    }

    .tutorial-rules-title {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .tutorial-rule-card {
        padding: 8px 10px;
        gap: 8px;
    }

    .tutorial-rule-num {
        font-size: 18px;
        width: 24px;
    }

    .tutorial-rule-icon {
        font-size: 24px;
    }

    .tutorial-rule-text strong {
        font-size: 14px;
    }

    .tutorial-rule-text span {
        font-size: 12px;
        line-height: 1.3;
    }

    .tutorial-rule-arrow {
        margin: 0;
        font-size: 16px;
    }

    .tutorial-rules-footer {
        margin-top: 16px;
    }

    .tutorial-demo {
        padding: 12px 10px;
    }

    .tutorial-demo-header {
        margin-bottom: 8px;
    }

    .tutorial-guide-bubble {
        padding: 8px 12px;
        margin-bottom: 8px;
    }

    .tutorial-guide-avatar {
        font-size: 24px;
    }

    .tutorial-guide-text {
        font-size: 14px;
    }

    .tutorial-complete {
        padding: 24px 16px;
    }

    .tutorial-complete-tips {
        margin-bottom: 16px;
    }

    .tutorial-tip {
        padding: 8px 12px;
        font-size: 13px;
    }
}

.hidden {
    display: none !important;
}

@keyframes laserSweep {
    0% {
        top: 0%;
    }

    50% {
        top: 100%;
    }

    100% {
        top: 0%;
    }
}

/* Prevent background scroll when tutorial modal is active */
body.modal-open {
    overflow: hidden !important;
}

/* Tutorial Memorized Action Container (below card) */
.tutorial-memorize-action {
    display: flex;
    justify-content: center;
    margin: 20px 0 10px;
    width: 100%;
}

.tutorial-memorized-btn {
    padding: 14px 32px !important;
    font-size: 18px !important;
    font-weight: 800 !important;
    border-radius: var(--border-radius-md) !important;
    background: var(--color-beginner) !important;
    border: none !important;
    color: var(--bg-card) !important;
    box-shadow: var(--button-shadow) !important;
    width: 100% !important;
    max-width: 240px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.1s ease, box-shadow 0.1s ease !important;
    cursor: pointer;
}

.tutorial-memorized-btn:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
}

.tutorial-memorized-btn:active {
    transform: translateY(4px) !important;
    box-shadow: var(--button-shadow-active) !important;
}

/* ゲーム画面表示中のみ、ヘッダーを上部固定（sticky）にしない */
body.in-game .app-header {
    position: relative;
}

/* ゲーム画面のレスポンシブ対応（画面高さまたは幅が狭い場合） */
@media (max-width: 480px),
(max-height: 720px) {
    body.in-game .game-info-bar {
        margin-bottom: 8px;
    }

    body.in-game .game-arena {
        margin-bottom: 12px;
    }

    body.in-game .card-wrapper {
        height: 210px;
    }

    body.in-game .target-container {
        min-height: 110px;
    }

    body.in-game .target-svg-wrapper {
        width: 90px;
        height: 90px;
    }

    body.in-game .target-text {
        font-size: 56px;
    }

    body.in-game .question-header {
        margin-bottom: 10px;
    }

    body.in-game .question-prompt-text {
        font-size: 18px;
    }

    body.in-game .question-mark-icon {
        font-size: 24px;
    }

    body.in-game .choices-grid {
        gap: 16px;
    }

    body.in-game .choice-btn {
        height: 78px;
    }

    body.in-game .choice-content .target-svg-wrapper {
        width: 56px;
        height: 56px;
    }

    body.in-game .choice-content .target-text {
        font-size: 32px;
    }

    body.in-game .choice-num-badge {
        width: 22px;
        height: 22px;
        font-size: 12px;
    }

    body.in-game #game-memorized-btn {
        padding: 12px 24px;
        font-size: 18px;
        margin-top: 12px;
    }
}

@media (max-height: 600px) {
    body.in-game .game-info-bar {
        margin-bottom: 4px;
    }

    body.in-game .game-arena {
        margin-bottom: 8px;
    }

    body.in-game .card-wrapper {
        height: 170px;
    }

    body.in-game .target-container {
        min-height: 90px;
    }

    body.in-game .target-svg-wrapper {
        width: 75px;
        height: 75px;
    }

    body.in-game .target-text {
        font-size: 48px;
    }

    body.in-game .question-header {
        margin-bottom: 6px;
    }

    body.in-game .question-prompt-text {
        font-size: 16px;
    }

    body.in-game .question-mark-icon {
        font-size: 20px;
    }

    body.in-game .choices-grid {
        gap: 12px;
    }

    body.in-game .choice-btn {
        height: 62px;
    }

    body.in-game .choice-content .target-svg-wrapper {
        width: 44px;
        height: 44px;
    }

    body.in-game .choice-content .target-text {
        font-size: 28px;
    }

    body.in-game .choice-num-badge {
        width: 18px;
        height: 18px;
        font-size: 10px;
    }

    body.in-game #game-memorized-btn {
        padding: 10px 20px;
        font-size: 16px;
        margin-top: 8px;
    }
}

/* --------------------------------------------------------------------------
   16. EXPORT QR RESPONSIVE SIZE
   -------------------------------------------------------------------------- */

#export-qrcode-container {
    max-width: 100%;
    padding: 8px !important;
    overflow: hidden;
    flex-shrink: 0;
}

#export-qrcode-container canvas,
#export-qrcode-container img {
    display: block;
    max-width: 100%;
    height: auto;
}

#export-overlay .modal-content {
    overflow-y: auto;
    gap: 10px;
}

#export-overlay #close-export-btn {
    margin-top: 12px;
}

#export-overlay .transfer-textarea {
    flex-shrink: 1;
    min-height: 75px;
    resize: none;
}

.export-qr-message {
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 8px;
    flex-shrink: 0;
}

.export-qr-message.warning {
    color: var(--color-intermediate);
    font-weight: 700;
}

@media (max-width: 360px) {
    #export-overlay .modal-content {
        width: 94%;
        padding: 16px;
    }

    #export-qrcode-container {
        padding: 6px !important;
    }
}

/* 画面高さが小さい場合（アドレスバー表示時等）上下余白・ボタン間隔を詰める */
@media (max-height: 600px) {
    #export-overlay .modal-content {
        gap: 6px;
    }

    #export-overlay .modal-desc {
        font-size: 12px;
        margin: 0;
    }

    #export-overlay .transfer-textarea {
        min-height: 75px;
    }
}

@media (max-height: 500px) {
    #export-overlay .modal-content {
        gap: 4px;
        max-height: 95dvh;
        padding: 12px;
    }

    #export-overlay .modal-title {
        font-size: 16px;
        padding-bottom: 4px;
    }

    #export-overlay .modal-desc {
        display: none;
    }

    #export-overlay .transfer-textarea {
        min-height: 75px;
    }
}