/* ===== CSS VARIABLES FOR THEMES ===== */
:root {
    /* Neon Theme */
    --neon-bg-primary: #0a0e27;
    --neon-bg-secondary: #151937;
    --neon-bg-card: rgba(20, 25, 60, 0.6);
    --neon-text-primary: #00ff9f;
    --neon-text-secondary: #a0b4ff;
    --neon-accent: #00ff9f;
    --neon-accent-alt: #00d4ff;
    --neon-cell-alive: #00ff9f;
    --neon-cell-glow: 0 0 20px rgba(0, 255, 159, 0.6), 0 0 40px rgba(0, 255, 159, 0.3);
    --neon-border: rgba(0, 255, 159, 0.2);

    /* Sunset Theme */
    --sunset-bg-primary: #1a0e0a;
    --sunset-bg-secondary: #2d1810;
    --sunset-bg-card: rgba(45, 24, 16, 0.6);
    --sunset-text-primary: #ff6b35;
    --sunset-text-secondary: #ffb997;
    --sunset-accent: #ff6b35;
    --sunset-accent-alt: #f72585;
    --sunset-cell-alive: linear-gradient(135deg, #ff6b35, #f72585);
    --sunset-cell-glow: 0 0 20px rgba(255, 107, 53, 0.5), 0 0 40px rgba(247, 37, 133, 0.3);
    --sunset-border: rgba(255, 107, 53, 0.2);

    /* Minimal Theme */
    --minimal-bg-primary: #fafafa;
    --minimal-bg-secondary: #ffffff;
    --minimal-bg-card: rgba(255, 255, 255, 0.8);
    --minimal-text-primary: #1a1a1a;
    --minimal-text-secondary: #666666;
    --minimal-accent: #2563eb;
    --minimal-accent-alt: #7c3aed;
    --minimal-cell-alive: #1a1a1a;
    --minimal-cell-glow: 0 2px 8px rgba(26, 26, 26, 0.15);
    --minimal-border: rgba(0, 0, 0, 0.1);
}

/* ===== THEME APPLICATION ===== */
[data-theme="neon"] {
    --bg-primary: var(--neon-bg-primary);
    --bg-secondary: var(--neon-bg-secondary);
    --bg-card: var(--neon-bg-card);
    --text-primary: var(--neon-text-primary);
    --text-secondary: var(--neon-text-secondary);
    --accent: var(--neon-accent);
    --accent-alt: var(--neon-accent-alt);
    --cell-alive: var(--neon-cell-alive);
    --cell-glow: var(--neon-cell-glow);
    --border: var(--neon-border);
}

[data-theme="sunset"] {
    --bg-primary: var(--sunset-bg-primary);
    --bg-secondary: var(--sunset-bg-secondary);
    --bg-card: var(--sunset-bg-card);
    --text-primary: var(--sunset-text-primary);
    --text-secondary: var(--sunset-text-secondary);
    --accent: var(--sunset-accent);
    --accent-alt: var(--sunset-accent-alt);
    --cell-alive: var(--sunset-cell-alive);
    --cell-glow: var(--sunset-cell-glow);
    --border: var(--sunset-border);
}

[data-theme="minimal"] {
    --bg-primary: var(--minimal-bg-primary);
    --bg-secondary: var(--minimal-bg-secondary);
    --bg-card: var(--minimal-bg-card);
    --text-primary: var(--minimal-text-primary);
    --text-secondary: var(--minimal-text-secondary);
    --accent: var(--minimal-accent);
    --accent-alt: var(--minimal-accent-alt);
    --cell-alive: var(--minimal-cell-alive);
    --cell-glow: var(--minimal-cell-glow);
    --border: var(--minimal-border);
}

/* ===== BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-secondary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.5s ease, color 0.5s ease;
    position: relative;
}

/* ===== ANIMATED BACKGROUND ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.03;
    background: 
        radial-gradient(circle at 20% 50%, var(--accent) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--accent-alt) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, var(--accent) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, -30px) scale(1.1); }
    66% { transform: translate(-30px, 50px) scale(0.9); }
}

/* ===== CONTAINER ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* ===== HEADER ===== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.title-section {
    flex: 1;
    min-width: 250px;
}

.main-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.title-line {
    background: linear-gradient(135deg, var(--text-primary), var(--accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.7;
}

/* ===== THEME SELECTOR ===== */
.theme-selector {
    display: flex;
    gap: 0.75rem;
    background: var(--bg-card);
    padding: 0.5rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.theme-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    padding: 4px;
    transition: all 0.3s ease;
    position: relative;
}

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

.theme-btn.active::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 10px;
    background: var(--accent);
    opacity: 0.3;
    z-index: -1;
}

.theme-preview {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.theme-neon {
    background: linear-gradient(135deg, #0a0e27, #00ff9f);
}

.theme-sunset {
    background: linear-gradient(135deg, #1a0e0a, #ff6b35, #f72585);
}

.theme-minimal {
    background: linear-gradient(135deg, #fafafa, #2563eb);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

/* ===== GAME SECTION ===== */
.game-section {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid var(--border);
    transition: all 0.5s ease;
}

.status-bar {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.status-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    opacity: 0.6;
}

.status-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Orbitron', sans-serif;
}

.status-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.status-badge.running {
    background: var(--accent);
    color: var(--bg-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ===== GRID ===== */
.grid-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.grid {
    display: grid;
    gap: 2px;
    background: var(--border);
    padding: 2px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.cell {
    width: 100%;
    aspect-ratio: 1;
    min-width: 12px;
    min-height: 12px;
    background: var(--bg-secondary);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.cell:hover {
    background: var(--border);
    transform: scale(1.1);
}

.cell.alive {
    background: var(--cell-alive);
    box-shadow: var(--cell-glow);
    animation: cellAppear 0.3s ease;
}

@keyframes cellAppear {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

[data-theme="sunset"] .cell.alive {
    background: linear-gradient(135deg, #ff6b35, #f72585);
}

/* ===== CONTROL PANEL ===== */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: all 0.5s ease;
}

.control-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===== BUTTONS ===== */
.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.button-group:last-child {
    margin-bottom: 0;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    border: none;
    border-radius: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    background: var(--border);
    border-color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: var(--border);
    color: var(--text-primary);
}

.btn-full {
    width: 100%;
}

.btn svg {
    flex-shrink: 0;
}

/* ===== SLIDERS ===== */
.slider-control {
    margin-bottom: 1.25rem;
}

.slider-control:last-child {
    margin-bottom: 0;
}

.slider-control label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.slider-value {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    color: var(--text-primary);
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-secondary);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px var(--accent);
}

.slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px var(--accent);
}

/* ===== PATTERNS ===== */
.patterns-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.pattern-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pattern-card:hover {
    background: var(--border);
    border-color: var(--accent);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.pattern-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-grid {
    display: grid;
    grid-template-columns: repeat(3, 12px);
    grid-template-rows: repeat(3, 12px);
    gap: 2px;
}

.mini-grid div {
    background: var(--bg-card);
    border-radius: 2px;
}

.mini-grid div.active {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 2rem;
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2.5rem;
    max-width: 700px;
    width: 100%;
    position: relative;
    animation: slideUp 0.4s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.modal-close:hover {
    background: var(--accent);
    color: var(--bg-primary);
    transform: rotate(90deg);
}

.modal-content h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.modal-content h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.25rem;
    color: var(--text-primary);
    margin: 2rem 0 1rem;
}

.modal-intro {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.rule-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.rule-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.rule-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.rule-card h4 {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.rule-card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-list {
    list-style: none;
    padding: 0;
}

.info-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list strong {
    color: var(--text-primary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .control-panel {
        order: -1;
    }

    .patterns-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .theme-selector {
        width: 100%;
        justify-content: center;
    }

    .button-group {
        grid-template-columns: 1fr;
    }

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

    .rules-grid {
        grid-template-columns: 1fr;
    }

    .status-bar {
        flex-direction: column;
        gap: 1rem;
    }

    .modal-content {
        padding: 2rem 1.5rem;
    }

    .grid {
        max-width: 100%;
    }

    .cell {
        min-width: 10px;
        min-height: 10px;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2rem;
    }

    .control-group {
        padding: 1rem;
    }

    .game-section {
        padding: 1rem;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .control-panel,
    .theme-selector,
    .status-bar,
    .modal {
        display: none !important;
    }

    body {
        background: white;
    }

    .grid {
        box-shadow: none;
    }
}