/* Apple Classic Color Palette */
:root {
    /* Default Blue Theme */
    --apple-blue: #007AFF;
    --apple-gray: #8E8E93;
    --apple-light-gray: #E5E5EA;
    --apple-white: #FFFFFF;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-blue);
    --background-color: var(--apple-white);
    --background-gradient: linear-gradient(145deg, #f6f9fc, #ffffff);
    --text-color: var(--apple-black);
    --secondary-text: var(--apple-gray);
    --border-color: var(--apple-light-gray);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
    --button-active-shadow: 0 2px 6px rgba(0, 122, 255, 0.3);
    
    /* Consistent sizing proportions */
    --spacing-xs: 0.25rem;  /* 4px */
    --spacing-sm: 0.5rem;   /* 8px */
    --spacing-md: 1rem;     /* 16px */
    --spacing-lg: 1.5rem;   /* 24px */
    --spacing-xl: 2rem;     /* 32px */
    
    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-md: 1rem;      /* 16px */
    --font-size-lg: 1.25rem;   /* 20px */
    --font-size-xl: 1.5rem;    /* 24px */
    --font-size-2xl: 2rem;     /* 32px */
    --font-size-3xl: 2.5rem;   /* 40px */
    
    --border-radius-sm: 0.5rem;  /* 8px */
    --border-radius-md: 0.75rem; /* 12px */
    --border-radius-lg: 1rem;    /* 16px */
    --border-radius-xl: 1.5rem;  /* 24px */
}

/* Dark Theme */
[data-theme="dark"] {
    --apple-blue: #0A84FF;
    --apple-gray: #98989D;
    --apple-light-gray: #48484A;
    --apple-white: #1C1C1E;
    --apple-black: #F5F5F7;
    --apple-red: #FF453A;
    --apple-green: #32D74B;
    --apple-purple: #BF5AF2;
    --apple-orange: #FF9F0A;
    --apple-yellow: #FFD60A;
    --apple-pink: #FF375F;
    --apple-teal: #64D2FF;
    --accent-color: var(--apple-blue);
    --background-color: #1C1C1E;
    --background-gradient: linear-gradient(145deg, #2c2c2e, #1c1c1e);
    --text-color: #F5F5F7;
    --secondary-text: #98989D;
    --border-color: #48484A;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --button-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
    --button-active-shadow: 0 2px 6px rgba(10, 132, 255, 0.4);
}

/* Green Theme */
[data-theme="green"] {
    --apple-blue: #34C759;
    --apple-gray: #8E8E93;
    --apple-light-gray: #E5F8EC;
    --apple-white: #F2FFF6;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-green);
    --background-color: #E5F8EC;
    --background-gradient: linear-gradient(145deg, #d3f2e0, #f2fff6);
    --text-color: #1D4B30;
    --secondary-text: #5B8266;
    --border-color: #C7E6D7;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(52, 199, 89, 0.2);
    --button-active-shadow: 0 2px 6px rgba(52, 199, 89, 0.3);
}

/* Pink Theme */
[data-theme="pink"] {
    --apple-blue: #FF2D55;
    --apple-gray: #8E8E93;
    --apple-light-gray: #FFEBEF;
    --apple-white: #FFF5F7;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-pink);
    --background-color: #FFEBEF;
    --background-gradient: linear-gradient(145deg, #ffe0e6, #fff5f7);
    --text-color: #99162F;
    --secondary-text: #BC5C71;
    --border-color: #FFCCD6;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(255, 45, 85, 0.2);
    --button-active-shadow: 0 2px 6px rgba(255, 45, 85, 0.3);
}

/* Purple Theme */
[data-theme="purple"] {
    --apple-blue: #5856D6;
    --apple-gray: #8E8E93;
    --apple-light-gray: #EEECFF;
    --apple-white: #F7F6FF;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-purple);
    --background-color: #EEECFF;
    --background-gradient: linear-gradient(145deg, #e5e3f7, #f7f6ff);
    --text-color: #33308A;
    --secondary-text: #7A79A8;
    --border-color: #D5D4F5;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(88, 86, 214, 0.2);
    --button-active-shadow: 0 2px 6px rgba(88, 86, 214, 0.3);
}

/* Orange Theme */
[data-theme="orange"] {
    --apple-blue: #FF9500;
    --apple-gray: #8E8E93;
    --apple-light-gray: #FFF4E5;
    --apple-white: #FFFAF2;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-orange);
    --background-color: #FFF4E5;
    --background-gradient: linear-gradient(145deg, #ffe8cc, #fffaf2);
    --text-color: #8F5000;
    --secondary-text: #B38144;
    --border-color: #FFE0B3;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(255, 149, 0, 0.2);
    --button-active-shadow: 0 2px 6px rgba(255, 149, 0, 0.3);
}

/* Adding a blue theme, so the default white also has a corresponding colored theme */
[data-theme="blue"] {
    --apple-blue: #007AFF;
    --apple-gray: #8E8E93;
    --apple-light-gray: #E5F0FF;
    --apple-white: #F5F9FF;
    --apple-black: #1D1D1F;
    --apple-red: #FF3B30;
    --apple-green: #34C759;
    --apple-purple: #5856D6;
    --apple-orange: #FF9500;
    --apple-yellow: #FFCC00;
    --apple-pink: #FF2D55;
    --apple-teal: #5AC8FA;
    --accent-color: var(--apple-blue);
    --background-color: #E5F0FF;
    --background-gradient: linear-gradient(145deg, #d8e7ff, #f5f9ff);
    --text-color: #004999;
    --secondary-text: #3377B8;
    --border-color: #C7DFFF;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --button-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
    --button-active-shadow: 0 2px 6px rgba(0, 122, 255, 0.3);
}

/* Theme selector styles */
.theme-selector {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
    flex-wrap: wrap;
}

.theme-option {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    border: 2px solid transparent;
}

.theme-option:hover {
    transform: scale(1.15);
}

.theme-option.active {
    border-color: var(--text-color);
    transform: scale(1.15);
}

.theme-option.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-color);
}

.theme-white { 
    background-color: #FFFFFF; 
    border: 2px solid #E5E5EA;
}
.theme-blue { background-color: #007AFF; }
.theme-dark { background-color: #1C1C1E; }
.theme-green { background-color: #34C759; }
.theme-pink { background-color: #FF2D55; }
.theme-purple { background-color: #5856D6; }
.theme-orange { background-color: #FF9500; }

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
    background-color: var(--background-color);
    background-image: var(--background-gradient);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-md);
    transition: all 0.3s ease;
}

.container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    min-height: 90vh;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--card-shadow);
    background-color: var(--apple-white);
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--apple-blue), var(--apple-purple), var(--apple-pink));
}

header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 30%;
    width: 40%;
    height: 3px;
    background: linear-gradient(90deg, var(--apple-blue), var(--apple-purple));
    border-radius: 2px;
}

.slogan {
    color: var(--secondary-text);
    font-size: var(--font-size-md);
    font-weight: 400;
}

.metronome {
    background-color: var(--apple-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--card-shadow);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    flex: 1;
    position: relative;
}

.display {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.tempo-display {
    display: flex;
    align-items: baseline;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.tempo-display::before {
    content: '';
    position: absolute;
    width: 140%;
    height: 140%;
    top: -20%;
    left: -20%;
    background: radial-gradient(circle at center, rgba(90, 200, 250, 0.05) 0%, rgba(0, 122, 255, 0.01) 70%, transparent 100%);
    z-index: -1;
    border-radius: 50%;
}

#tempo-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-color);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.unit {
    font-size: var(--font-size-lg);
    margin-left: var(--spacing-sm);
    color: var(--secondary-text);
    font-weight: 500;
}

/* Beat indicator */
.beat-indicator-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: calc(var(--spacing-lg) * 1.5);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-xl);
    min-height: 70px;
    background-color: rgba(0, 0, 0, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 100%;
    flex-wrap: wrap;
}

/* When the beat count is greater than 4, special processing is done */
.beat-indicator-container.many-beats {
    padding: var(--spacing-lg) var(--spacing-xl);
}

/* Dynamic adjustment of spacing - JavaScript will add these classes based on the beat count */
.beat-indicator-container.beats-5,
.beat-indicator-container.beats-6,
.beat-indicator-container.beats-7 {
    gap: calc(var(--spacing-lg) * 1.2);
}

.beat-indicator {
    width: 28px;
    height: 28px;
    border: 2.5px solid var(--accent-color);
    background-color: transparent;
    border-radius: 50%;
    position: relative;
    transition: all 0.1s ease;
}

.beat-indicator.active {
    background-color: var(--accent-color);
    transform: scale(1.25);
    box-shadow: 0 0 18px var(--accent-color), 0 0 5px rgba(255, 255, 255, 0.7);
}

.beat-indicator.accent {
    border-color: var(--apple-red);
    border-width: 2.5px;
}

.beat-indicator.accent.active {
    background-color: var(--apple-red);
    box-shadow: 0 0 22px var(--apple-red), 0 0 5px rgba(255, 255, 255, 0.8);
    animation: accentPop 0.25s ease;
}

@keyframes accentPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.6); }
    100% { transform: scale(1.25); }
}

.controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.tempo-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.tempo-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background-color: var(--accent-color);
    color: white;
    font-size: var(--font-size-xl);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: var(--button-shadow);
    margin: 0 var(--spacing-xs);
}

.tempo-btn:hover {
    background-color: #0062cc;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 122, 255, 0.25);
}

.tempo-btn:active {
    transform: translateY(0);
    box-shadow: var(--button-active-shadow);
}

#tempo-slider {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    outline: none;
    border-radius: 4px;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

#tempo-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#tempo-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 8px rgba(0, 122, 255, 0.3);
}

#tempo-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#tempo-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 8px rgba(0, 122, 255, 0.3);
}

.settings-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-width: 150px;
    flex-grow: 1;
}

.setting-label {
    font-size: var(--font-size-sm);
    color: var(--secondary-text);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.setting-label svg {
    width: 16px;
    height: 16px;
    fill: var(--secondary-text);
}

.sound-selector, .time-signature select, .subdivision-selector {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--apple-white);
    font-size: var(--font-size-md);
    color: var(--text-color);
    outline: none;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%238E8E93%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 15px top 50%;
    background-size: 12px auto;
    padding-right: 30px;
}

.sound-selector:hover, .time-signature select:hover, .subdivision-selector:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.time-signature {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex-grow: 1;
}

.signature-control {
    display: flex;
    width: 100%;
}

.signature-control select {
    width: 100%;
}

.start-btn {
    background-color: var(--apple-green);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    padding: var(--spacing-md) 0;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.25);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    height: 50px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.start-btn:hover {
    background-color: #2db84d;
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(52, 199, 89, 0.3);
}

.start-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(52, 199, 89, 0.25);
}

.start-btn.stop {
    background-color: var(--apple-red);
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25);
}

.start-btn.stop:hover {
    background-color: #e6352b;
    box-shadow: 0 6px 18px rgba(255, 59, 48, 0.3);
}

.start-btn.stop:active {
    box-shadow: 0 3px 10px rgba(255, 59, 48, 0.25);
}

.tap-tempo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

#tap-tempo-btn {
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    height: 44px;
    min-width: 140px;
}

#tap-tempo-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 122, 255, 0.08);
    transform: translateX(-100%);
    transition: transform 0.3s;
}

#tap-tempo-btn:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

#tap-tempo-btn:hover::before {
    transform: translateX(0);
}

#tap-tempo-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 122, 255, 0.15);
}

#tap-info {
    font-size: var(--font-size-sm);
    color: var(--secondary-text);
    font-weight: 500;
}

.footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--secondary-text);
    font-size: var(--font-size-sm);
}

/* Responsive design - Desktop optimization */
@media (min-width: 1200px) {
    .container {
        max-width: 900px;
        padding: var(--spacing-xl);
    }
    
    h1 {
        font-size: 3rem;
    }
    
    .metronome {
        padding: var(--spacing-xl);
    }
    
    #tempo-value {
        font-size: 4rem;
    }
    
    .unit {
        font-size: var(--font-size-xl);
    }
    
    .tempo-btn {
        width: 56px;
        height: 56px;
        font-size: 1.75rem;
    }
    
    .start-btn {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md) 0;
        height: 56px;
    }
}

/* Tablet */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .container {
        padding: var(--spacing-lg);
    }
    
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    .metronome {
        padding: var(--spacing-lg);
    }
    
    #tempo-value {
        font-size: var(--font-size-3xl);
    }
    
    .tempo-btn {
        width: 44px;
        height: 44px;
        font-size: var(--font-size-lg);
    }
    
    .settings-row {
        flex-direction: column;
    }
    
    .beat-indicator {
        width: 24px;
        height: 24px;
        border-width: 2.5px;
    }
    
    .beat-indicator-container {
        gap: calc(var(--spacing-lg) * 1.2);
        min-height: 60px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* Multi-beat processing on tablets */
    .beat-indicator-container.beats-5,
    .beat-indicator-container.beats-6,
    .beat-indicator-container.beats-7 {
        gap: var(--spacing-md);
        padding-top: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }
}

/* Mobile */
@media (max-width: 480px) {
    body {
        padding: var(--spacing-xs);
    }
    
    .container {
        padding: var(--spacing-md);
        min-height: 80vh;
    }
    
    h1 {
        font-size: var(--font-size-xl);
    }
    
    .metronome {
        padding: var(--spacing-md);
        gap: var(--spacing-lg);
    }
    
    #tempo-value {
        font-size: var(--font-size-2xl);
    }
    
    .unit {
        font-size: var(--font-size-md);
    }
    
    .tempo-btn {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    .beat-indicator {
        width: 20px;
        height: 20px;
        border-width: 2px;
    }
    
    .beat-indicator-container {
        gap: var(--spacing-md);
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 50px;
    }
    
    .start-btn {
        font-size: var(--font-size-md);
        padding: var(--spacing-sm) 0;
        height: 44px;
    }
    
    #tap-tempo-btn {
        font-size: var(--font-size-sm);
        padding: var(--spacing-xs) var(--spacing-md);
        height: 38px;
        min-width: 120px;
    }
    
    .settings-row {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .setting-group {
        min-width: 100%;
    }
    
    .sound-selector, .time-signature select, .subdivision-selector {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    .theme-option {
        width: 20px;
        height: 20px;
    }
}

/* Hide pendulum container */
.pendulum-container {
    display: none;
}

/* Subdivision styles */
.subdivision-indicator {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.subdivision-beat {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.1);
    transition: all 0.1s ease;
}

.subdivision-beat.active {
    background-color: var(--accent-color);
    transform: scale(1.2);
    box-shadow: 0 0 8px rgba(0, 122, 255, 0.4);
}

@media (max-width: 480px) {
    /* ... 其他CSS保持不变 ... */
    
    .sound-selector, .time-signature select, .subdivision-selector {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
}