/* =============================================
   NEUMORPHIC TIC-TAC-TOE
   Premium Soft UI Design System with 9 Themes
   ============================================= */

/* =============================================
   THEME 1: CANVAS - Radical Minimalism
   ============================================= */
:root,
[data-theme="canvas"] {
    --bg-color: #FFFFFF;
    --surface-color: #FAFAFA;
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-muted: #888888;
    --accent: #E5E5E5;
    --accent-active: #1A1A1A;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 1);
    --shadow-dark: 6px 6px 16px rgba(200, 200, 200, 0.4);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.9);
    --shadow-inset-dark: inset 3px 3px 8px rgba(200, 200, 200, 0.35);
    --x-color: #1A1A1A;
    --o-color: #666666;
    --winner-glow: rgba(26, 26, 26, 0.15);
    --font-primary: 'Helvetica Neue', 'Inter', sans-serif;
}

/* =============================================
   THEME 2: AZURE - Reliable Tech
   ============================================= */
[data-theme="azure"] {
    --bg-color: #F4F7FA;
    --surface-color: #EDF2F7;
    --text-primary: #0F172A;
    --text-secondary: #334155;
    --text-muted: #64748B;
    --accent: #2D7FF9;
    --accent-active: #1D6AD8;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 0.9);
    --shadow-dark: 6px 6px 16px rgba(45, 127, 249, 0.15);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.8);
    --shadow-inset-dark: inset 3px 3px 8px rgba(45, 127, 249, 0.12);
    --x-color: #2D7FF9;
    --o-color: #0F172A;
    --winner-glow: rgba(45, 127, 249, 0.3);
    --font-primary: 'Roboto', 'Open Sans', sans-serif;
}

/* =============================================
   THEME 3: AURORA - Morning Clarity (Glassmorphism)
   ============================================= */
[data-theme="aurora"] {
    --bg-color: linear-gradient(135deg, #A1C4FD 0%, #C2E9FB 100%);
    --surface-color: rgba(255, 255, 255, 0.65);
    --text-primary: #3D4F6F;
    --text-secondary: #5E6C84;
    --text-muted: #8896AB;
    --accent: #A1C4FD;
    --accent-active: #7EB0F9;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 0.7);
    --shadow-dark: 6px 6px 16px rgba(161, 196, 253, 0.35);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.6);
    --shadow-inset-dark: inset 3px 3px 8px rgba(161, 196, 253, 0.25);
    --x-color: #5E8BCA;
    --o-color: #8FAACC;
    --winner-glow: rgba(161, 196, 253, 0.5);
    --font-primary: 'Nunito', 'Quicksand', sans-serif;
    --glass-blur: blur(12px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.4);
}

/* =============================================
   THEME 4: SOLAR - Kinetic Energy
   ============================================= */
[data-theme="solar"] {
    --bg-color: linear-gradient(90deg, #FF9966 0%, #FF5E62 100%);
    --surface-color: rgba(17, 17, 17, 0.85);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --text-muted: rgba(255, 255, 255, 0.6);
    --accent: #FF9966;
    --accent-active: #FF5E62;
    --shadow-light: -6px -6px 16px rgba(255, 153, 102, 0.3);
    --shadow-dark: 6px 6px 16px rgba(0, 0, 0, 0.4);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 153, 102, 0.2);
    --shadow-inset-dark: inset 3px 3px 8px rgba(0, 0, 0, 0.35);
    --x-color: #FF9966;
    --o-color: #FFFFFF;
    --winner-glow: rgba(255, 94, 98, 0.5);
    --font-primary: 'Montserrat', 'Teko', sans-serif;
}

/* =============================================
   THEME 5: APRICOT - Organic Warmth
   ============================================= */
[data-theme="apricot"] {
    --bg-color: linear-gradient(180deg, #FFD194 0%, #D1913C 100%);
    --surface-color: #FFF8F0;
    --text-primary: #4A3B32;
    --text-secondary: #6B5848;
    --text-muted: #9A8678;
    --accent: #D1913C;
    --accent-active: #B87D30;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 0.7);
    --shadow-dark: 6px 6px 16px rgba(209, 145, 60, 0.25);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.6);
    --shadow-inset-dark: inset 3px 3px 8px rgba(209, 145, 60, 0.2);
    --x-color: #B87D30;
    --o-color: #4A3B32;
    --winner-glow: rgba(255, 209, 148, 0.5);
    --font-primary: 'Merriweather', 'Lato', serif;
}

/* =============================================
   THEME 6: DUSK - Transition & Balance
   ============================================= */
[data-theme="dusk"] {
    --bg-color: linear-gradient(160deg, #708090 0%, #F4C4C2 100%);
    --surface-color: #F0F4F8;
    --text-primary: #2C3E50;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --accent: #708090;
    --accent-active: #5A6A7A;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 0.75);
    --shadow-dark: 6px 6px 16px rgba(112, 128, 144, 0.25);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.65);
    --shadow-inset-dark: inset 3px 3px 8px rgba(112, 128, 144, 0.2);
    --x-color: #708090;
    --o-color: #D4979A;
    --winner-glow: rgba(244, 196, 194, 0.5);
    --font-primary: 'Playfair Display', 'Source Sans Pro', serif;
}

/* =============================================
   THEME 7: BLUSH - Soft Romance
   ============================================= */
[data-theme="blush"] {
    --bg-color: radial-gradient(circle, #FFC3A0 0%, #FFAFBD 100%);
    --surface-color: #FFFAFA;
    --text-primary: #885A5A;
    --text-secondary: #A07878;
    --text-muted: #C4A0A0;
    --accent: #FFAFBD;
    --accent-active: #F59CAB;
    --shadow-light: -6px -6px 16px rgba(255, 255, 255, 0.8);
    --shadow-dark: 6px 6px 16px rgba(255, 175, 189, 0.3);
    --shadow-inset-light: inset -3px -3px 8px rgba(255, 255, 255, 0.7);
    --shadow-inset-dark: inset 3px 3px 8px rgba(255, 175, 189, 0.25);
    --x-color: #E88A9B;
    --o-color: #885A5A;
    --winner-glow: rgba(255, 195, 160, 0.5);
    --font-primary: 'Josefin Sans', 'Great Vibes', sans-serif;
}

/* =============================================
   THEME 8: VAPOR - Digital Nostalgia (Cyberpunk)
   ============================================= */
[data-theme="vapor"] {
    --bg-color: linear-gradient(45deg, #DA22FF 0%, #9733EE 100%);
    --surface-color: rgba(25, 0, 40, 0.9);
    --text-primary: #E0AAFF;
    --text-secondary: #C77DFF;
    --text-muted: #9D4EDD;
    --accent: #DA22FF;
    --accent-active: #FF44FF;
    --shadow-light: -6px -6px 16px rgba(218, 34, 255, 0.2);
    --shadow-dark: 6px 6px 16px rgba(0, 0, 0, 0.5);
    --shadow-inset-light: inset -3px -3px 8px rgba(218, 34, 255, 0.15);
    --shadow-inset-dark: inset 3px 3px 8px rgba(0, 0, 0, 0.4);
    --x-color: #DA22FF;
    --o-color: #00FFFF;
    --winner-glow: rgba(218, 34, 255, 0.6);
    --font-primary: 'Orbitron', 'Press Start 2P', monospace;
    --neon-glow: 0 0 10px currentColor, 0 0 20px currentColor;
}

/* =============================================
   THEME 9: ABYSS - Premium Luxury
   ============================================= */
[data-theme="abyss"] {
    --bg-color: linear-gradient(180deg, #0F2027 0%, #203A43 50%, #2C5364 100%);
    --surface-color: rgba(15, 32, 39, 0.9);
    --text-primary: rgba(255, 255, 255, 0.85);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --accent: #2C5364;
    --accent-active: #3D7A8C;
    --shadow-light: -6px -6px 16px rgba(44, 83, 100, 0.3);
    --shadow-dark: 6px 6px 16px rgba(0, 0, 0, 0.5);
    --shadow-inset-light: inset -3px -3px 8px rgba(44, 83, 100, 0.2);
    --shadow-inset-dark: inset 3px 3px 8px rgba(0, 0, 0, 0.4);
    --x-color: #5DADE2;
    --o-color: rgba(255, 255, 255, 0.85);
    --winner-glow: rgba(93, 173, 226, 0.5);
    --font-primary: 'Cinzel', 'Bodoni', serif;
}

/* =============================================
   BASE STYLES
   ============================================= */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
    margin: 0;
    padding: 40px 20px 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-color);
    color: var(--text-primary);
    transition: all 0.4s ease;
}

/* =============================================
   HEADER
   ============================================= */

header {
    text-align: center;
    margin-bottom: 32px;
}

h1 {
    font-weight: 700;
    font-size: 2.5rem;
    margin: 0;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.tagline {
    margin-top: 8px;
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* =============================================
   GAME CONTAINER
   ============================================= */

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 420px;
    background: var(--surface-color);
    border-radius: 32px;
    box-shadow: var(--shadow-light), var(--shadow-dark);
    padding: 32px 28px 36px;
    backdrop-filter: var(--glass-blur, none);
    border: var(--glass-border, none);
    transition: all 0.4s ease;
}

/* =============================================
   SCORE BOXES - CONSISTENT DESIGN
   ============================================= */

.score-container {
    display: flex;
    justify-content: center;
    width: 100%;
    margin-bottom: 24px;
    gap: 24px;
}

.score-box {
    flex: 1;
    max-width: 140px;
    text-align: center;
    padding: 20px 24px;
    background: var(--surface-color);
    border-radius: 20px;
    box-shadow: var(--shadow-light), var(--shadow-dark);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.3s ease;
}

.score-box.is-active {
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

.score-box .label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.score-box .value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* =============================================
   STATUS & TURN INDICATOR
   ============================================= */

.status-message {
    margin: 12px 0 8px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    min-height: 1.5em;
}

.turn-indicator {
    font-size: 0.85rem;
    margin-bottom: 20px;
    padding: 8px 20px;
    border-radius: 50px;
    background: var(--surface-color);
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    color: var(--text-secondary);
    font-weight: 500;
}

/* =============================================
   GAME BOARD - NEUMORPHIC
   ============================================= */

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 28px;
    background: var(--surface-color);
    border-radius: 24px;
    padding: 20px;
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    width: 100%;
    max-width: 320px;
}

.cell {
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    font-weight: 700;
    cursor: pointer;
    background: var(--surface-color);
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow-light), var(--shadow-dark);
    transition: all 0.2s ease;
}

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

.cell:active {
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    transform: translateY(0);
}

.cell.x {
    color: var(--x-color);
    text-shadow: var(--neon-glow, none);
}

.cell.o {
    color: var(--o-color);
    text-shadow: var(--neon-glow, none);
}

.cell.winner {
    background: linear-gradient(145deg, var(--winner-glow), transparent);
    box-shadow: 0 0 20px var(--winner-glow), var(--shadow-light), var(--shadow-dark);
}

/* =============================================
   BUTTONS - NEUMORPHIC PILLS
   ============================================= */

.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    width: 100%;
    margin-bottom: 16px;
}

button {
    padding: 12px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    background: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: var(--shadow-light), var(--shadow-dark);
    transition: all 0.2s ease;
    font-family: inherit;
}

button:hover {
    transform: translateY(-1px);
}

button:active {
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    transform: translateY(0);
}

button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* =============================================
   SETTINGS PANEL - NEUMORPHIC MODAL
   ============================================= */

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(8px);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.settings-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 90%;
    max-width: 420px;
    max-height: 80vh;
    overflow-y: auto;
    background: var(--surface-color);
    border-radius: 28px;
    box-shadow: var(--shadow-light), var(--shadow-dark),
        0 25px 50px rgba(0, 0, 0, 0.15);
    padding: 28px;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
}

.settings-panel.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.settings-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.close-settings {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
    background: var(--surface-color);
    box-shadow: var(--shadow-light), var(--shadow-dark);
}

.close-settings:hover {
    color: var(--accent-active);
}

.settings-group {
    margin-bottom: 24px;
}

.settings-group h3 {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 14px;
    border: none;
    padding: 0;
}

.theme-options,
.difficulty-options,
.symbol-options,
.mode-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-start;
}

/* =============================================
   CIRCULAR THEME SWATCHES
   ============================================= */

.theme-selector-group .theme-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    padding: 8px 0;
}

.theme-swatch {
    width: 48px;
    height: 48px;
    padding: 4px;
    border: none;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: none;
}

.theme-swatch:hover {
    transform: scale(1.1);
}

.theme-swatch:active {
    transform: scale(0.95);
}

.theme-swatch.active {
    box-shadow: 0 0 0 3px var(--surface-color), 0 0 0 5px var(--text-muted);
}

.swatch-circle {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Individual theme gradient swatches */
.swatch-canvas {
    background: linear-gradient(180deg, #FFFFFF 0%, #E8E8E8 100%);
}

.swatch-azure {
    background: linear-gradient(180deg, #2D7FF9 0%, #1A5FCC 100%);
}

.swatch-aurora {
    background: linear-gradient(180deg, #A1C4FD 0%, #C2E9FB 100%);
}

.swatch-solar {
    background: linear-gradient(180deg, #FF9966 0%, #FF5E62 100%);
}

.swatch-apricot {
    background: linear-gradient(180deg, #FFD194 0%, #D1913C 100%);
}

.swatch-dusk {
    background: linear-gradient(180deg, #F4C4C2 0%, #708090 100%);
}

.swatch-blush {
    background: linear-gradient(180deg, #FFC3A0 0%, #FFAFBD 100%);
}

.swatch-vapor {
    background: linear-gradient(180deg, #DA22FF 0%, #9733EE 100%);
}

.swatch-abyss {
    background: linear-gradient(180deg, #2C5364 0%, #0F2027 100%);
}

.difficulty-btn,
.symbol-btn,
.mode-btn {
    padding: 10px 16px;
    font-size: 0.85rem;
    border-radius: 50px;
}

.difficulty-btn.active,
.symbol-btn.active,
.mode-btn.active {
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    color: var(--accent-active);
    font-weight: 700;
}

/* =============================================
   HISTORY CONTAINER
   ============================================= */

.history-container {
    display: none;
    margin-top: 20px;
    width: 100%;
    max-height: 180px;
    overflow-y: auto;
    background: var(--surface-color);
    border-radius: 20px;
    padding: 16px;
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

.history-container h3 {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 0 0 12px 0;
}

.history-move {
    padding: 8px 12px;
    margin: 6px 0;
    background: var(--surface-color);
    border-radius: 12px;
    box-shadow: var(--shadow-light), var(--shadow-dark);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =============================================
   PROGRESS BAR
   ============================================= */

.progress-container {
    width: 180px;
    height: 8px;
    background: var(--surface-color);
    box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
    border-radius: 50px;
    margin: 12px auto;
    overflow: hidden;
    display: none;
}

.progress-container.visible {
    display: block;
}

.progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 50px;
    width: 0%;
    transition: width linear;
}

/* =============================================
   FOOTER
   ============================================= */

.footer-note {
    margin-top: 40px;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

/* =============================================
   SCROLL LOCK
   ============================================= */

.no-scroll {
    overflow: hidden;
}

/* =============================================
   REDUCED MOTION
   ============================================= */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */

@media (max-width: 500px) {
    body {
        padding: 24px 16px 40px;
    }

    h1 {
        font-size: 2rem;
    }

    .game-container {
        padding: 24px 20px 28px;
        border-radius: 28px;
    }

    .score-container {
        gap: 16px;
    }

    .score-box {
        padding: 16px 20px;
    }

    .score-box .value {
        font-size: 1.8rem;
    }

    .board {
        gap: 10px;
        padding: 16px;
        max-width: 280px;
    }

    .cell {
        font-size: 1.8rem;
        border-radius: 12px;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    button {
        width: 100%;
    }

    .settings-panel {
        padding: 24px 20px;
        border-radius: 24px;
    }

    .theme-options {
        justify-content: center;
    }
}