* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e8e8e8;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 550px;
    width: 100%;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

h1 {
    margin: 0 0 5px 0;
    font-size: 2.5em;
    background: linear-gradient(135deg, #a855f7, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #aaa;
    margin: 0 0 25px 0;
    font-size: 0.95em;
}

.game-area {
    margin-bottom: 20px;
}

.hint-card {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 15px 20px;
    margin-bottom: 20px;
    border-left: 4px solid #a855f7;
}

.hint-label {
    font-size: 0.75em;
    color: #a855f7;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.hint-text {
    font-size: 1.05em;
    line-height: 1.4;
    color: #fff;
    font-style: italic;
}

.syllable-container {
    margin-bottom: 20px;
}

.syllable-bank {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    min-height: 70px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    margin-bottom: 15px;
    border: 2px dashed rgba(255, 255, 255, 0.15);
}

.drop-zone-label {
    font-size: 0.85em;
    color: #888;
    text-align: center;
    margin-bottom: 8px;
}

.drop-zone {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    min-height: 80px;
    padding: 15px;
    background: rgba(168, 85, 247, 0.1);
    border-radius: 12px;
    border: 2px dashed rgba(168, 85, 247, 0.4);
    transition: all 0.3s;
}

.drop-zone.has-syllables {
    border-style: solid;
    background: rgba(168, 85, 247, 0.15);
}

.drop-zone:empty::before {
    content: 'Drop syllables here';
    color: #666;
    font-style: italic;
    align-self: center;
}

.syllable {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border-radius: 12px;
    font-size: 1.2em;
    font-weight: 600;
    cursor: grab;
    user-select: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    border: 2px solid transparent;
}

.syllable:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.syllable:active {
    cursor: grabbing;
    transform: scale(0.95);
}

.syllable.dragging {
    opacity: 0.5;
    transform: scale(1.1);
}

.syllable.touch-dragging {
    background: linear-gradient(135deg, #a855f7, #ec4899);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.6);
}

.syllable.correct {
    background: linear-gradient(135deg, #10b981, #34d399);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    animation: pop 0.3s ease;
}

.syllable.revealed {
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
    cursor: default;
}

.syllable.pop {
    animation: pop 0.3s ease;
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

@keyframes celebrate {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.shake {
    animation: shake 0.4s ease;
}

.celebrate {
    animation: celebrate 0.6s ease;
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.primary-btn, .secondary-btn, .ghost-btn {
    flex: 1;
    min-width: 100px;
    padding: 14px 20px;
    font-size: 1em;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.primary-btn {
    background: linear-gradient(135deg, #10b981, #34d399);
    color: white;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.4);
}

.secondary-btn {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
}

.secondary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

.ghost-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #aaa;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.stat {
    background: rgba(0, 0, 0, 0.2);
    padding: 12px 8px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.7em;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.3em;
    font-weight: bold;
    color: #a855f7;
}

.timer-container {
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    margin-bottom: 15px;
    overflow: hidden;
}

.timer-bar {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
    border-radius: 4px;
    transition: width 0.1s linear;
}

.timer-bar.warning {
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.timer-bar.danger {
    background: linear-gradient(90deg, #ef4444, #f87171);
    animation: pulse 0.5s infinite;
}

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

.message {
    text-align: center;
    font-size: 1.1em;
    font-weight: bold;
    min-height: 30px;
    margin: 10px 0;
    transition: color 0.3s;
}

.message.success {
    color: #34d399;
}

.message.error {
    color: #f87171;
}

.message.info {
    color: #60a5fa;
}

.settings {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.settings label {
    color: #aaa;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 5px;
}

.settings input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

#difficulty {
    padding: 8px 15px;
    font-size: 0.9em;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    cursor: pointer;
}

#theme-toggle {
    padding: 8px 15px;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.1);
    color: #aaa;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

#theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.instructions {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 15px 20px;
    font-size: 0.85em;
}

.instructions h3 {
    margin: 0 0 10px 0;
    color: #a855f7;
    font-size: 1em;
}

.instructions ul {
    margin: 0;
    padding-left: 20px;
    color: #aaa;
}

.instructions li {
    margin-bottom: 5px;
}

.music-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    padding: 12px 15px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    font-size: 0.85em;
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.music-controls button {
    padding: 8px 12px;
    font-size: 0.9em;
    margin: 3px;
    background: rgba(255, 255, 255, 0.1);
    color: #aaa;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.music-controls button:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.music-controls .song-name {
    font-size: 0.8em;
    color: #666;
    margin-top: 8px;
    text-align: center;
}

/* Light theme */
body.light {
    background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 50%, #e9d5ff 100%);
    color: #333;
}

body.light .container {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

body.light h1 {
    background: linear-gradient(135deg, #9333ea, #db2777);
    -webkit-background-clip: text;
    background-clip: text;
}

body.light .subtitle {
    color: #666;
}

body.light .hint-card {
    background: rgba(168, 85, 247, 0.1);
}

body.light .hint-text {
    color: #333;
}

body.light .syllable-bank {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
}

body.light .drop-zone {
    background: rgba(168, 85, 247, 0.08);
    border-color: rgba(168, 85, 247, 0.3);
}

body.light .drop-zone.has-syllables {
    background: rgba(168, 85, 247, 0.12);
}

body.light .drop-zone:empty::before {
    color: #999;
}

body.light .stat {
    background: rgba(0, 0, 0, 0.05);
}

body.light .stat-label {
    color: #666;
}

body.light .timer-container {
    background: rgba(0, 0, 0, 0.1);
}

body.light .ghost-btn {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
    color: #666;
}

body.light #difficulty {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
    color: #333;
}

body.light #theme-toggle {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
    color: #666;
}

body.light .instructions {
    background: rgba(0, 0, 0, 0.05);
}

body.light .instructions ul {
    color: #666;
}

body.light .music-controls {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.1);
}

body.light .music-controls button {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
    color: #666;
}

body.light .music-controls button:hover {
    background: rgba(0, 0, 0, 0.1);
    color: #333;
}

/* Mobile responsive */
@media (max-width: 520px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 20px 15px;
    }

    h1 {
        font-size: 2em;
    }

    .syllable {
        padding: 10px 16px;
        font-size: 1.1em;
    }

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

    .controls {
        flex-direction: column;
    }

    .primary-btn, .secondary-btn, .ghost-btn {
        width: 100%;
    }

    .settings {
        flex-direction: column;
        gap: 15px;
    }

    .music-controls {
        bottom: 10px;
        right: 10px;
        left: 10px;
        text-align: center;
    }
}