* {
    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: 520px;
    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, #00d9ff, #00ff88);
    -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;
}

/* Timer Bar */
.timer-bar {
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background: linear-gradient(90deg, #00d9ff, #00ff88);
    border-radius: 4px;
    transition: width 0.05s linear;
}

.timer-fill.warning {
    background: linear-gradient(90deg, #ffcc00, #ff9900);
}

.timer-fill.danger {
    background: linear-gradient(90deg, #ff6600, #ff0000);
    animation: pulse 0.5s infinite;
}

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

/* Audio Controls */
.audio-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.play-btn {
    padding: 20px 40px;
    font-size: 1.2em;
    background: linear-gradient(135deg, #00d9ff, #0099cc);
    color: white;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.play-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.4);
}

.play-btn:disabled {
    background: #555;
    cursor: not-allowed;
    transform: none;
}

.play-icon {
    font-size: 1.3em;
}

.replay-btn {
    padding: 15px 25px;
    font-size: 1em;
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.replay-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(155, 89, 182, 0.4);
}

.replay-btn:disabled {
    background: #555;
    cursor: not-allowed;
}

/* Word Hint */
.word-hint {
    text-align: center;
    font-size: 1.8em;
    font-family: 'Courier New', monospace;
    letter-spacing: 5px;
    color: #00ff88;
    margin: 20px 0;
    min-height: 40px;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.3);
}

/* Input Area */
.input-area {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#guess {
    flex: 1;
    padding: 18px;
    font-size: 1.2em;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
    text-align: center;
    letter-spacing: 2px;
}

#guess:focus {
    border-color: #00d9ff;
    box-shadow: 0 0 15px rgba(0, 217, 255, 0.3);
}

#guess:disabled {
    background: rgba(0, 0, 0, 0.5);
    color: #666;
}

#guess::placeholder {
    color: #666;
    letter-spacing: normal;
}

#submit-btn {
    padding: 18px 35px;
    font-size: 1.1em;
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
}

#submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(39, 174, 96, 0.4);
}

#submit-btn:disabled {
    background: #555;
    cursor: not-allowed;
}

/* Stats */
.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: 10px;
    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: 1.4em;
    font-weight: bold;
    color: #00d9ff;
}

/* Message */
.message {
    text-align: center;
    font-size: 1.1em;
    font-weight: bold;
    min-height: 30px;
    margin: 15px 0;
    transition: color 0.3s;
}

.message.success {
    color: #2ecc71;
}

.message.error {
    color: #e74c3c;
}

.message.info {
    color: #3498db;
}

/* Lives */
.lives-container {
    text-align: center;
    margin: 15px 0;
}

.lives-label {
    color: #aaa;
    font-size: 0.9em;
    margin-right: 10px;
}

.lives {
    display: inline-flex;
    gap: 8px;
}

.heart {
    font-size: 1.5em;
    color: #e74c3c;
    text-shadow: 0 0 10px rgba(231, 76, 60, 0.5);
    transition: all 0.3s;
}

.heart.lost {
    color: #444;
    text-shadow: none;
    transform: scale(0.8);
}

/* Settings */
.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;
}

#difficulty, #speed {
    padding: 8px 15px;
    font-size: 0.9em;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    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: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* Instructions */
.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: #00d9ff;
    font-size: 1em;
}

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

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

/* Music Controls */
.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;
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); }
    40%, 80% { transform: translateX(10px); }
}

@keyframes celebrate {
    0% { transform: scale(1); }
    25% { transform: scale(1.02); }
    50% { transform: scale(1.04); }
    75% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.shake {
    animation: shake 0.4s ease;
}

.celebrate {
    animation: celebrate 0.5s ease;
}

/* Light Theme */
body.light {
    background: linear-gradient(135deg, #e8f4f8 0%, #d4e8ee 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, #0099cc, #00cc88);
    -webkit-background-clip: text;
    background-clip: text;
}

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

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

body.light .word-hint {
    color: #00aa66;
}

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

body.light #guess::placeholder {
    color: #999;
}

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

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

body.light .stat-value {
    color: #0099cc;
}

body.light .heart {
    color: #e74c3c;
}

body.light .heart.lost {
    color: #ddd;
}

body.light #difficulty,
body.light #speed {
    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 h3 {
    color: #0099cc;
}

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;
    }

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

    .play-btn {
        width: 100%;
        justify-content: center;
    }

    .replay-btn {
        width: 100%;
        justify-content: center;
    }

    .word-hint {
        font-size: 1.4em;
        letter-spacing: 3px;
    }

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

    .input-area {
        flex-direction: column;
    }

    #submit-btn {
        width: 100%;
    }

    .settings {
        flex-direction: column;
        gap: 8px;
    }

    .settings label {
        margin-top: 5px;
    }

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