/* ============================================
   SproutMaths — Theme System
   Light (Garden) / Dark (Mystical) / Sparkle (Cosmic)
   ============================================ */

/* ---- Fullscreen ---- */
html, body {
    height: 100%;
}

body.fullscreen {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    overflow-y: auto;
}

/* ---- Particles canvas ---- */
#particles-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
}

#app {
    position: relative;
    z-index: 1;
}

/* ---- Theme Toggle Button ---- */
.theme-toggle {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 200;
    display: flex;
    gap: 6px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 6px;
    border-radius: 50px;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    font-family: var(--font);
}

.theme-btn:active { transform: scale(0.9); }
.theme-btn.active {
    border-color: var(--white);
    background: rgba(255,255,255,0.25);
    color: var(--white);
}

/* Fullscreen toggle */
.fs-toggle {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 200;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: rgba(255,255,255,0.8);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.fs-toggle:active { transform: scale(0.9); }

/* ============================================
   THEME: Garden (Light — default)
   ============================================ */
[data-theme="garden"] {
    --brand: #B784F7;
    --brand-dark: #8E5AD7;
    --brand-light: #D8B4FE;
    --brand-pale: #F6EEFF;

    --bg-1: #B89EEF;
    --bg-2: #D0B0F8;
    --bg-3: #E8D8FF;
    --bg-4: #FBF7FF;
    --card-bg: var(--white);
    --card-text: var(--dark);
    --input-bg: #F6EEFF;
    --tab-bg: rgba(255,255,255,0.14);
    --tab-active-bg: var(--white);
    --tab-active-text: var(--brand-dark);
    --bubble-glow: none;
}

[data-theme="garden"] body,
body[data-theme="garden"] {
    background: linear-gradient(170deg, var(--bg-1) 0%, var(--bg-2) 38%, var(--bg-3) 74%, var(--bg-4) 100%);
}

/* ============================================
   THEME: Mystical (Dark)
   Deep purples, blues, firefly particles
   ============================================ */
[data-theme="mystical"] {
    --brand: #A78BFA;
    --brand-dark: #7C3AED;
    --brand-light: #C4B5FD;
    --brand-pale: #1E1B2E;

    --bg-1: #0F0A1A;
    --bg-2: #1A1035;
    --bg-3: #2D1B69;
    --bg-4: #1E1B2E;

    --dark: #EDE9FE;
    --mid: #A5B4FC;
    --light: #2A2545;
    --white: #FFFFFF;
    --muted: #7C7A9A;
    --sun: #FBBF24;
    --leaf: #A78BFA;
    --stem: #818CF8;

    --card-bg: rgba(30, 27, 46, 0.85);
    --card-text: #EDE9FE;
    --input-bg: rgba(42, 37, 69, 0.8);
    --tab-bg: rgba(255,255,255,0.06);
    --tab-active-bg: rgba(167, 139, 250, 0.25);
    --tab-active-text: #C4B5FD;
    --bubble-glow: 0 0 20px rgba(167, 139, 250, 0.4);
}

body[data-theme="mystical"] {
    background: linear-gradient(170deg, #0F0A1A 0%, #1A1035 40%, #2D1B69 70%, #1E1340 100%);
}

[data-theme="mystical"] .card {
    background: var(--card-bg);
    border: 1px solid rgba(167, 139, 250, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--card-text);
}

[data-theme="mystical"] .card-title { color: #C4B5FD; }

[data-theme="mystical"] .brand-mark {
    background: rgba(167, 139, 250, 0.2);
    border: 1px solid rgba(167, 139, 250, 0.3);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.2);
}

[data-theme="mystical"] .brand-mark .leaf-icon { color: #A78BFA; }
[data-theme="mystical"] .brand-text { color: #EDE9FE; }
[data-theme="mystical"] .brand-text span { color: #FBBF24; }

[data-theme="mystical"] .btn-primary {
    background: linear-gradient(135deg, #7C3AED, #5B21B6);
}

[data-theme="mystical"] .btn-secondary {
    background: rgba(167, 139, 250, 0.15);
    color: #C4B5FD;
    border-color: rgba(167, 139, 250, 0.3);
}

[data-theme="mystical"] .btn-ghost {
    background: rgba(167, 139, 250, 0.1);
    color: #C4B5FD;
}

[data-theme="mystical"] .name-input {
    background: var(--input-bg);
    border-color: rgba(167, 139, 250, 0.2);
    color: #EDE9FE;
}

[data-theme="mystical"] .name-input:focus {
    border-color: #A78BFA;
    background: rgba(42, 37, 69, 0.95);
}

[data-theme="mystical"] .age-btn {
    background: rgba(30, 27, 46, 0.7);
    border-color: rgba(167, 139, 250, 0.15);
    color: #C4B5FD;
}

[data-theme="mystical"] .age-btn.active {
    border-color: #A78BFA;
    background: rgba(167, 139, 250, 0.2);
}

[data-theme="mystical"] .option-btn {
    background: rgba(30, 27, 46, 0.7);
    border-color: rgba(167, 139, 250, 0.15);
}

[data-theme="mystical"] .option-btn.active {
    border-color: #A78BFA;
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.2);
}

[data-theme="mystical"] .game-card {
    background: var(--card-bg);
    border: 1px solid rgba(167, 139, 250, 0.1);
    color: #EDE9FE;
}

[data-theme="mystical"] .game-card.playable:hover {
    border-color: #A78BFA;
    box-shadow: 0 0 20px rgba(167, 139, 250, 0.15);
}

[data-theme="mystical"] .game-card-desc { color: #7C7A9A; }

[data-theme="mystical"] .profile-item {
    background: rgba(42, 37, 69, 0.7);
    border-color: transparent;
}

[data-theme="mystical"] .profile-item:active { border-color: #A78BFA; }
[data-theme="mystical"] .profile-item-name { color: #EDE9FE; }
[data-theme="mystical"] .profile-item-meta { color: #7C7A9A; }

[data-theme="mystical"] .hub-stat {
    background: rgba(167, 139, 250, 0.12);
}

[data-theme="mystical"] .xp-bar-wrap {
    background: rgba(167, 139, 250, 0.1);
}

[data-theme="mystical"] .xp-bar-track {
    background: rgba(0,0,0,0.3);
}

[data-theme="mystical"] .xp-bar-fill {
    background: linear-gradient(90deg, #A78BFA, #7C3AED);
}

[data-theme="mystical"] .tab-btn {
    color: rgba(196, 181, 253, 0.5);
}

[data-theme="mystical"] .tab-btn.active {
    background: var(--tab-active-bg);
    color: var(--tab-active-text);
}

[data-theme="mystical"] .badge-play {
    background: #7C3AED;
}

[data-theme="mystical"] .badge-soon {
    background: rgba(42, 37, 69, 0.8);
    color: #7C7A9A;
}

[data-theme="mystical"] .bubble-area {
    background: rgba(167, 139, 250, 0.05);
    border: 1px solid rgba(167, 139, 250, 0.1);
}

[data-theme="mystical"] .bubble {
    box-shadow: inset -4px -4px 8px rgba(0,0,0,0.2), inset 4px 4px 8px rgba(255,255,255,0.15), var(--bubble-glow);
}

[data-theme="mystical"] .game-over-stats {
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.15);
}

[data-theme="mystical"] .achievement {
    background: rgba(42, 37, 69, 0.7);
    border-left-color: rgba(167, 139, 250, 0.2);
}

[data-theme="mystical"] .achievement.unlocked { border-left-color: #A78BFA; }
[data-theme="mystical"] .achievement-icon { background: rgba(167, 139, 250, 0.15); }
[data-theme="mystical"] .achievement-name { color: #EDE9FE; }
[data-theme="mystical"] .achievement-desc { color: #7C7A9A; }

[data-theme="mystical"] .shop-item {
    background: rgba(42, 37, 69, 0.7);
}

[data-theme="mystical"] .shop-item:active { border-color: #A78BFA; }

[data-theme="mystical"] .mastery-pip { background: rgba(167, 139, 250, 0.2); }
[data-theme="mystical"] .mastery-pip.earned { background: #A78BFA; }
[data-theme="mystical"] .mastery-pip.earned.gold { background: #FBBF24; }

/* ============================================
   THEME: Cosmic (Sparkle)
   Deep space, stars, neon pinks & cyans
   ============================================ */
[data-theme="cosmic"] {
    --brand: #EC4899;
    --brand-dark: #DB2777;
    --brand-light: #F9A8D4;
    --brand-pale: #0F172A;

    --bg-1: #020617;
    --bg-2: #0F172A;
    --bg-3: #1E293B;
    --bg-4: #0F172A;

    --dark: #F0F9FF;
    --mid: #7DD3FC;
    --light: #1E293B;
    --white: #FFFFFF;
    --muted: #64748B;
    --sun: #FBBF24;
    --leaf: #EC4899;
    --stem: #06B6D4;

    --card-bg: rgba(15, 23, 42, 0.8);
    --card-text: #F0F9FF;
    --input-bg: rgba(30, 41, 59, 0.8);
    --tab-bg: rgba(255,255,255,0.05);
    --tab-active-bg: rgba(236, 72, 153, 0.2);
    --tab-active-text: #F9A8D4;
    --bubble-glow: 0 0 25px rgba(236, 72, 153, 0.35);
}

body[data-theme="cosmic"] {
    background: linear-gradient(170deg, #020617 0%, #0F172A 40%, #1E1B4B 70%, #0F172A 100%);
}

[data-theme="cosmic"] .card {
    background: var(--card-bg);
    border: 1px solid rgba(236, 72, 153, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--card-text);
}

[data-theme="cosmic"] .card-title { color: #F9A8D4; }

[data-theme="cosmic"] .brand-mark {
    background: rgba(236, 72, 153, 0.15);
    border: 1px solid rgba(236, 72, 153, 0.25);
    box-shadow: 0 0 30px rgba(236, 72, 153, 0.2), 0 0 60px rgba(6, 182, 212, 0.1);
}

[data-theme="cosmic"] .brand-mark .leaf-icon { color: #EC4899; }
[data-theme="cosmic"] .brand-text { color: #F0F9FF; }
[data-theme="cosmic"] .brand-text span { color: #22D3EE; }

[data-theme="cosmic"] .btn-primary {
    background: linear-gradient(135deg, #EC4899, #DB2777);
    box-shadow: 0 4px 20px rgba(236, 72, 153, 0.3);
}

[data-theme="cosmic"] .btn-secondary {
    background: rgba(236, 72, 153, 0.1);
    color: #F9A8D4;
    border-color: rgba(236, 72, 153, 0.25);
}

[data-theme="cosmic"] .btn-ghost {
    background: rgba(236, 72, 153, 0.08);
    color: #F9A8D4;
}

[data-theme="cosmic"] .name-input {
    background: var(--input-bg);
    border-color: rgba(236, 72, 153, 0.15);
    color: #F0F9FF;
}

[data-theme="cosmic"] .name-input:focus {
    border-color: #EC4899;
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.2);
}

[data-theme="cosmic"] .age-btn {
    background: rgba(15, 23, 42, 0.7);
    border-color: rgba(236, 72, 153, 0.1);
    color: #7DD3FC;
}

[data-theme="cosmic"] .age-btn.active {
    border-color: #22D3EE;
    background: rgba(6, 182, 212, 0.15);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

[data-theme="cosmic"] .option-btn {
    background: rgba(15, 23, 42, 0.7);
    border-color: rgba(236, 72, 153, 0.1);
}

[data-theme="cosmic"] .option-btn.active {
    border-color: #EC4899;
    box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.2);
}

[data-theme="cosmic"] .game-card {
    background: var(--card-bg);
    border: 1px solid rgba(6, 182, 212, 0.08);
    color: #F0F9FF;
}

[data-theme="cosmic"] .game-card.playable:hover {
    border-color: #22D3EE;
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.15);
}

[data-theme="cosmic"] .game-card-desc { color: #64748B; }

[data-theme="cosmic"] .profile-item {
    background: rgba(30, 41, 59, 0.6);
}

[data-theme="cosmic"] .profile-item:active { border-color: #EC4899; }
[data-theme="cosmic"] .profile-item-name { color: #F0F9FF; }
[data-theme="cosmic"] .profile-item-meta { color: #64748B; }

[data-theme="cosmic"] .hub-stat {
    background: rgba(236, 72, 153, 0.1);
}

[data-theme="cosmic"] .xp-bar-wrap {
    background: rgba(6, 182, 212, 0.08);
}

[data-theme="cosmic"] .xp-bar-track { background: rgba(0,0,0,0.4); }

[data-theme="cosmic"] .xp-bar-fill {
    background: linear-gradient(90deg, #EC4899, #22D3EE);
    box-shadow: 0 0 10px rgba(236, 72, 153, 0.4);
}

[data-theme="cosmic"] .tab-btn { color: rgba(249, 168, 212, 0.4); }

[data-theme="cosmic"] .tab-btn.active {
    background: var(--tab-active-bg);
    color: var(--tab-active-text);
}

[data-theme="cosmic"] .badge-play {
    background: #EC4899;
    box-shadow: 0 0 8px rgba(236, 72, 153, 0.4);
}

[data-theme="cosmic"] .badge-soon {
    background: rgba(30, 41, 59, 0.8);
    color: #64748B;
}

[data-theme="cosmic"] .bubble-area {
    background: rgba(6, 182, 212, 0.03);
    border: 1px solid rgba(6, 182, 212, 0.08);
}

[data-theme="cosmic"] .bubble {
    box-shadow: inset -4px -4px 8px rgba(0,0,0,0.25), inset 4px 4px 8px rgba(255,255,255,0.1), var(--bubble-glow);
}

[data-theme="cosmic"] .game-over-stats {
    background: rgba(236, 72, 153, 0.08);
    border: 1px solid rgba(236, 72, 153, 0.12);
}

[data-theme="cosmic"] .achievement {
    background: rgba(30, 41, 59, 0.6);
    border-left-color: rgba(6, 182, 212, 0.15);
}

[data-theme="cosmic"] .achievement.unlocked { border-left-color: #22D3EE; }
[data-theme="cosmic"] .achievement-icon { background: rgba(236, 72, 153, 0.12); }
[data-theme="cosmic"] .achievement-name { color: #F0F9FF; }
[data-theme="cosmic"] .achievement-desc { color: #64748B; }

[data-theme="cosmic"] .shop-item { background: rgba(30, 41, 59, 0.6); }
[data-theme="cosmic"] .shop-item:active { border-color: #22D3EE; }

[data-theme="cosmic"] .mastery-pip { background: rgba(6, 182, 212, 0.15); }
[data-theme="cosmic"] .mastery-pip.earned { background: #22D3EE; }
[data-theme="cosmic"] .mastery-pip.earned.gold { background: #FBBF24; }

/* ---- Glow effects for dark themes ---- */
[data-theme="mystical"] .brand-mark,
[data-theme="cosmic"] .brand-mark {
    animation: glowPulse 3s ease infinite;
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 20px rgba(167, 139, 250, 0.2); }
    50% { box-shadow: 0 0 40px rgba(167, 139, 250, 0.35); }
}

[data-theme="cosmic"] .brand-mark {
    animation: glowPulseCosmic 3s ease infinite;
}

@keyframes glowPulseCosmic {
    0%, 100% { box-shadow: 0 0 20px rgba(236, 72, 153, 0.2), 0 0 40px rgba(6, 182, 212, 0.1); }
    50% { box-shadow: 0 0 40px rgba(236, 72, 153, 0.35), 0 0 80px rgba(6, 182, 212, 0.2); }
}