/* カスタムプロパティ */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-cell: #1a1a2e;
    --accent-primary: #00d4ff;
    --accent-secondary: #7b2cbf;
    --accent-glow: rgba(0, 212, 255, 0.4);
    --text-primary: #e8e8e8;
    --text-secondary: #8a8a9a;
    --border-color: #2a2a3e;
    --cell-size: min(60px, 15vw);
    --grid-gap: 8px;
    --font-display: 'Orbitron', 'Rajdhani', sans-serif;
    --font-body: 'Rajdhani', 'Segoe UI', sans-serif;
}

/* リセットとベース */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: 
        radial-gradient(ellipse at 20% 80%, rgba(123, 44, 191, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

/* Google Fonts読み込み */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@400;500;700&display=swap');

.container {
    text-align: center;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
}

/* ヘッダー */
header {
    margin-bottom: 2rem;
}

h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px var(--accent-glow);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* ゲーム情報 */
.game-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.moves-counter {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.moves-counter .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.moves-counter #moves {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-primary);
}

/* ゲームボード */
.game-board {
    display: grid;
    grid-template-columns: repeat(5, var(--cell-size));
    grid-template-rows: repeat(5, var(--cell-size));
    gap: var(--grid-gap);
    justify-content: center;
    margin: 0 auto 2rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 
        0 0 60px rgba(0, 212, 255, 0.05),
        inset 0 0 30px rgba(0, 0, 0, 0.3);
}

/* セル */
.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    overflow: hidden;
    background: var(--bg-cell);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cell img,
.cell canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    transition: transform 0.3s ease;
}

.cell img.clear1,
.cell canvas.clear1 {
    transform: scale(1.3);
}

.cell-canvas {
    display: block;
}

.cell:hover {
    transform: scale(1.05);
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.cell:active {
    transform: scale(0.95);
}

/* オン状態 */
.cell.on {
    border-color: var(--accent-primary);
    box-shadow: 
        0 0 15px var(--accent-glow),
        inset 0 0 10px rgba(0, 212, 255, 0.1);
}

/* オフ状態 */
.cell.off {
    border-color: var(--border-color);
    opacity: 0.7;
}

.cell.off:hover {
    opacity: 1;
}

/* クリアメッセージ */
.clear-message {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

.clear-message.hidden {
    display: none;
}

.clear-content {
    text-align: center;
    padding: 3rem;
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 20px;
    box-shadow: 
        0 0 60px var(--accent-glow),
        0 0 100px rgba(123, 44, 191, 0.3);
    animation: scaleIn 0.4s ease;
}

.clear-content h2 {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #00ff88 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    animation: pulse 1.5s infinite;
}

.clear-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.btn-share {
    border-color: #1da1f2;
    color: #1da1f2;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-share:hover {
    background: #1da1f2;
    color: white;
    box-shadow: 0 4px 20px rgba(29, 161, 242, 0.4);
}

.clear-content #final-moves {
    color: var(--accent-primary);
    font-weight: 700;
    font-family: var(--font-display);
}

/* ボタン */
.controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.875rem 1.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-reset {
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

.btn-reset:hover {
    background: var(--accent-secondary);
    color: white;
    box-shadow: 0 4px 20px rgba(123, 44, 191, 0.4);
}

.btn-debug {
    border-color: #ff6b6b;
    color: #ff6b6b;
    font-size: 0.75rem;
    display: none;
}

.btn-debug:hover {
    background: #ff6b6b;
    color: white;
    box-shadow: 0 4px 20px rgba(255, 107, 107, 0.4);
}

/* アニメーション */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.8);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

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

/* セルのトグルアニメーション */
.cell.toggling {
    animation: cellToggle 0.2s ease;
}

@keyframes cellToggle {
    0% { transform: scale(1); }
    50% { transform: scale(0.85); }
    100% { transform: scale(1); }
}

/* レスポンシブ対応 */
@media (max-width: 400px) {
    :root {
        --cell-size: 13vw;
        --grid-gap: 6px;
    }
    
    .container {
        padding: 1rem;
    }
    
    .game-board {
        padding: 0.75rem;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.8rem;
    }
}

@media (min-width: 600px) {
    :root {
        --cell-size: 70px;
    }
}