* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Default Theme (Purple) */
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --primary-color: #667eea;
    --primary-hover: #764ba2;
    --container-bg: #ffffff;
    --text-color: #333333;
    --text-secondary: #555555;
    --text-tertiary: #666666;
    --border-color: #e2e8f0;
    --surface-bg: #f7fafc;
    --in-tune-color: #48bb78;
    --close-color: #ecc94b;
    --out-tune-color: #f56565;
}

body.theme-light {
    /* Light Theme (Olive/Yellow) */
    --bg-gradient-start: #97B22D;
    --bg-gradient-end: #89751B;
    --primary-color: #97B22D;
    --primary-hover: #89751B;
    --container-bg: #FEFCAD;
    --text-color: #2d3748;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: #E3DE81;
    --surface-bg: #f1ff72;
}

body.theme-dark {
    /* Dark Theme (Dark Olive) */
    --bg-gradient-start: #2d3d0f;
    --bg-gradient-end: #1a2208;
    --primary-color: #97B22D;
    --primary-hover: #E3DE81;
    --container-bg: #1f2d0a;
    --text-color: #E3DAB2;
    --text-secondary: #E3DE81;
    --text-tertiary: #97B22D;
    --border-color: #3d4d1f;
    --surface-bg: #2a3a12;
}

body.theme-warm-light {
    /* Warm Light Theme */
    --bg-gradient-start: #C6BE28;
    --bg-gradient-end: #97B22D;
    --primary-color: #E49A32;
    --primary-hover: #C6BE28;
    --container-bg: #FEFCAD;
    --text-color: #3d3d1f;
    --text-secondary: #5d5d3f;
    --text-tertiary: #7d7d5f;
    --border-color: #E3DAB2;
    --surface-bg: #faedb6;
}

body.theme-warm-dark {
    /* Warm Dark Theme */
    --bg-gradient-start: #2a2510;
    --bg-gradient-end: #1a1808;
    --primary-color: #E49A32;
    --primary-hover: #C6BE28;
    --container-bg: #2d2815;
    --text-color: #FEFCAD;
    --text-secondary: #E3DAB2;
    --text-tertiary: #C6BE28;
    --border-color: #4a3f1a;
    --surface-bg: #3a3220;
}

body.theme-red {
    /* Red Theme */
    --bg-gradient-start: #dc2626;
    --bg-gradient-end: #991b1b;
    --primary-color: #ef4444;
    --primary-hover: #dc2626;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #fecaca;
    --surface-bg: #fef2f2;
}

body.theme-pink {
    /* Pink Theme */
    --bg-gradient-start: #ec4899;
    --bg-gradient-end: #be185d;
    --primary-color: #f472b6;
    --primary-hover: #ec4899;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #fbcfe8;
    --surface-bg: #fdf2f8;
}

body.theme-red-dark {
    /* Dark Red Theme */
    --bg-gradient-start: #7f1d1d;
    --bg-gradient-end: #450a0a;
    --primary-color: #ef4444;
    --primary-hover: #f87171;
    --container-bg: #1a0505;
    --text-color: #fecaca;
    --text-secondary: #fca5a5;
    --text-tertiary: #f87171;
    --border-color: #7f1d1d;
    --surface-bg: #450a0a;
}

body.theme-pink-dark {
    /* Dark Pink Theme */
    --bg-gradient-start: #831843;
    --bg-gradient-end: #500724;
    --primary-color: #f472b6;
    --primary-hover: #f9a8d4;
    --container-bg: #1a050f;
    --text-color: #fce7f3;
    --text-secondary: #fbcfe8;
    --text-tertiary: #f9a8d4;
    --border-color: #831843;
    --surface-bg: #500724;
}

body.theme-black {
    /* Black Theme */
    --bg-gradient-start: #1f2937;
    --bg-gradient-end: #111827;
    --primary-color: #6b7280;
    --primary-hover: #9ca3af;
    --container-bg: #0f172a;
    --text-color: #f3f4f6;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --surface-bg: #1e293b;
}

body.theme-blue {
    /* Blue Theme */
    --bg-gradient-start: #3b82f6;
    --bg-gradient-end: #1e40af;
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #bfdbfe;
    --surface-bg: #eff6ff;
}

body.theme-blue-dark {
    /* Dark Blue Theme (Dark with Bright Blues) */
    --bg-gradient-start: #0c4a6e;
    --bg-gradient-end: #082f49;
    --primary-color: #38bdf8;
    --primary-hover: #0ea5e9;
    --container-bg: #0a1929;
    --text-color: #e0f2fe;
    --text-secondary: #7dd3fc;
    --text-tertiary: #38bdf8;
    --border-color: #0e7490;
    --surface-bg: #164e63;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    transition: background 0.3s ease;
}

.container {
    background: var(--container-bg);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    width: 100%;
    position: relative;
    transition: background 0.3s ease;
}

/* Header Row */
.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    margin-bottom: 15px;
}

.home-btn {
    text-decoration: none;
    font-size: 1.5em;
    padding: 5px;
    transition: transform 0.2s ease, opacity 0.2s ease;
    opacity: 0.8;
}

.home-btn:hover {
    transform: scale(1.1);
    opacity: 1;
}

h1 {
    text-align: center;
    color: var(--text-color);
    font-size: 1.8em;
    flex: 1;
    transition: color 0.3s ease;
}

.header-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Theme Picker */
.theme-picker {
    position: relative;
    margin-right: 10px;
}

.theme-btn-active {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

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

.theme-btn-active.theme-default {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.theme-btn-active.theme-light {
    background: linear-gradient(135deg, #97B22D 0%, #E3DE81 100%);
}

.theme-btn-active.theme-dark {
    background: linear-gradient(135deg, #2d3d0f 0%, #97B22D 100%);
}

.theme-btn-active.theme-warm-light {
    background: linear-gradient(135deg, #E49A32 0%, #FEFCAD 100%);
}

.theme-btn-active.theme-warm-dark {
    background: linear-gradient(135deg, #2a2510 0%, #E49A32 100%);
}

.theme-btn-active.theme-red {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.theme-btn-active.theme-pink {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.theme-btn-active.theme-red-dark {
    background: linear-gradient(135deg, #7f1d1d 0%, #ef4444 100%);
}

.theme-btn-active.theme-pink-dark {
    background: linear-gradient(135deg, #831843 0%, #f472b6 100%);
}

.theme-btn-active.theme-black {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

.theme-btn-active.theme-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.theme-btn-active.theme-blue-dark {
    background: linear-gradient(135deg, #0c4a6e 0%, #38bdf8 100%);
}

.theme-dropdown {
    position: absolute;
    top: 40px;
    left: 0;
    background: var(--container-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    display: none;
    grid-template-columns: 32px 32px;
    gap: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.theme-dropdown[style*="display: flex"],
.theme-dropdown[style*="display: grid"] {
    display: grid !important;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-btn:hover {
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.theme-btn.active {
    border: 3px solid var(--text-color);
    box-shadow: 0 0 0 2px var(--container-bg), 0 0 8px rgba(0, 0, 0, 0.3);
}

.theme-btn.theme-default {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.theme-btn.theme-light {
    background: linear-gradient(135deg, #97B22D 0%, #E3DE81 100%);
}

.theme-btn.theme-dark {
    background: linear-gradient(135deg, #2d3d0f 0%, #97B22D 100%);
}

.theme-btn.theme-warm-light {
    background: linear-gradient(135deg, #E49A32 0%, #FEFCAD 100%);
}

.theme-btn.theme-warm-dark {
    background: linear-gradient(135deg, #2a2510 0%, #E49A32 100%);
}

.theme-btn.theme-red {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.theme-btn.theme-pink {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.theme-btn.theme-red-dark {
    background: linear-gradient(135deg, #7f1d1d 0%, #ef4444 100%);
}

.theme-btn.theme-pink-dark {
    background: linear-gradient(135deg, #831843 0%, #f472b6 100%);
}

.theme-btn.theme-black {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

.theme-btn.theme-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.theme-btn.theme-blue-dark {
    background: linear-gradient(135deg, #0c4a6e 0%, #38bdf8 100%);
}

.info-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--primary-color);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s;
}

.info-btn:hover {
    color: var(--primary-hover);
}

/* Instrument Selector */
.instrument-selector {
    margin-bottom: 15px;
}

.dropdown-select {
    width: 100%;
    padding: 12px;
    font-size: 1em;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    background: var(--container-bg);
    color: var(--text-color);
    cursor: pointer;
    outline: none;
    transition: all 0.3s ease;
}

.dropdown-select:hover {
    border-color: var(--primary-hover);
    background: var(--surface-bg);
}

.dropdown-select:focus {
    border-color: var(--primary-hover);
    box-shadow: 0 0 0 3px var(--border-color);
}

/* String Buttons */
.string-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.string-btn {
    padding: 8px 16px;
    font-size: 0.95em;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.string-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.string-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.string-btn.in-tune {
    border-color: var(--in-tune-color);
    background: var(--in-tune-color);
    color: white;
}

/* Note Display */
.note-display {
    text-align: center;
    margin-bottom: 15px;
}

.detected-note {
    font-size: 4em;
    font-weight: bold;
    color: var(--text-color);
    line-height: 1;
    transition: color 0.2s ease;
}

.detected-note.in-tune {
    color: var(--in-tune-color);
}

.detected-note.close {
    color: var(--close-color);
}

.detected-note.out-tune {
    color: var(--out-tune-color);
}

.octave-display {
    font-size: 1.5em;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Tuner Gauge */
.tuner-gauge {
    margin-bottom: 15px;
}

.gauge-container {
    position: relative;
    height: 100px;
    background: var(--surface-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.gauge-scale {
    position: absolute;
    top: 10px;
    left: 20px;
    right: 20px;
    height: 30px;
}

.gauge-mark {
    position: absolute;
    width: 2px;
    height: 15px;
    background: var(--text-tertiary);
    transform: translateX(-50%);
}

.gauge-mark .mark-label {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7em;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.gauge-mark .mark-label.center-label {
    font-weight: bold;
    color: var(--in-tune-color);
}

.gauge-indicator-area {
    position: absolute;
    top: 50px;
    left: 20px;
    right: 20px;
    height: 30px;
}

.gauge-center-zone {
    position: absolute;
    left: 45%;
    width: 10%;
    height: 100%;
    background: rgba(72, 187, 120, 0.2);
    border-left: 2px solid var(--in-tune-color);
    border-right: 2px solid var(--in-tune-color);
}

.gauge-needle {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 4px;
    height: 25px;
    background: var(--out-tune-color);
    border-radius: 2px;
    transform: translate(-50%, -50%);
    transition: left 0.1s ease-out, background 0.2s ease;
}

.gauge-needle.in-tune {
    background: var(--in-tune-color);
}

.gauge-needle.close {
    background: var(--close-color);
}

.gauge-labels {
    position: absolute;
    bottom: 5px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
}

.gauge-label {
    font-size: 0.8em;
    font-weight: 600;
}

.gauge-label.flat {
    color: var(--out-tune-color);
}

.gauge-label.sharp {
    color: var(--out-tune-color);
}

/* Cents Display */
.cents-display {
    text-align: center;
    margin-bottom: 10px;
}

.cents-value {
    font-size: 2em;
    font-weight: bold;
    color: var(--text-color);
    transition: color 0.2s ease;
}

.cents-value.in-tune {
    color: var(--in-tune-color);
}

.cents-value.close {
    color: var(--close-color);
}

.cents-value.out-tune {
    color: var(--out-tune-color);
}

.cents-label {
    font-size: 0.9em;
    color: var(--text-tertiary);
    margin-left: 5px;
}

/* Frequency Display */
.frequency-display {
    text-align: center;
    margin-bottom: 15px;
}

.frequency-value {
    font-size: 1.2em;
    color: var(--text-secondary);
}

.frequency-label {
    font-size: 0.9em;
    color: var(--text-tertiary);
    margin-left: 3px;
}

/* Tuning Status */
.tuning-status {
    text-align: center;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    background: var(--surface-bg);
    transition: all 0.2s ease;
}

.tuning-status .status-text {
    font-weight: 600;
    color: var(--text-secondary);
}

.tuning-status.in-tune {
    background: rgba(72, 187, 120, 0.2);
}

.tuning-status.in-tune .status-text {
    color: var(--in-tune-color);
}

.tuning-status.close {
    background: rgba(236, 201, 75, 0.2);
}

.tuning-status.close .status-text {
    color: var(--close-color);
}

.tuning-status.out-tune {
    background: rgba(245, 101, 101, 0.2);
}

.tuning-status.out-tune .status-text {
    color: var(--out-tune-color);
}

/* Audio Level Meter */
.audio-level-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--surface-bg);
    border-radius: 8px;
    margin-bottom: 15px;
}

.audio-level-label {
    font-size: 0.85em;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    min-width: 70px;
}

.audio-level-meter {
    flex: 1;
    height: 12px;
    background: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.audio-level-bar {
    height: 100%;
    width: 0%;
    background: var(--in-tune-color);
    border-radius: 6px;
    transition: width 0.05s ease-out, background-color 0.1s ease;
}

.audio-level-bar.low {
    background: var(--out-tune-color);
}

.audio-level-bar.medium {
    background: var(--close-color);
}

.audio-level-bar.good {
    background: var(--in-tune-color);
}

.audio-level-status {
    font-size: 0.8em;
    color: var(--text-tertiary);
    min-width: 60px;
    text-align: right;
}

.audio-level-status.no-signal {
    color: var(--out-tune-color);
}

.audio-level-status.weak {
    color: var(--close-color);
}

.audio-level-status.good {
    color: var(--in-tune-color);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px;
    font-size: 1.1em;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary.active {
    background: var(--out-tune-color);
}

.btn-primary.active:hover {
    background: #e53e3e;
}

/* Reference Pitch */
.reference-pitch {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--surface-bg);
    border-radius: 8px;
    font-size: 0.9em;
}

.reference-pitch label {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.reference-pitch input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.reference-pitch input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.reference-pitch input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.reference-pitch span {
    color: var(--primary-color);
    font-weight: 600;
    min-width: 35px;
}

/* Input Gain/Volume Control */
.input-gain-control {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--surface-bg);
    border-radius: 8px;
    font-size: 0.9em;
    margin-bottom: 15px;
}

.input-gain-control label {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.input-gain-control input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.input-gain-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.input-gain-control input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.input-gain-control span {
    color: var(--primary-color);
    font-weight: 600;
    min-width: 25px;
}

/* Info Modal */
.info-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.info-modal-content {
    background: var(--container-bg);
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease;
}

.info-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px 15px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.info-modal-header h3 {
    margin: 0;
    color: var(--text-color);
}

.info-modal-content>div:not(.info-modal-header) {
    overflow-y: auto;
    flex: 1;
}

.info-modal-content h4 {
    color: var(--primary-color);
    margin-top: 15px;
    margin-bottom: 8px;
    font-size: 1.1em;
}

.info-modal-content h4:first-child {
    margin-top: 5px;
}

.info-modal-content p {
    margin: 8px 0;
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9em;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: var(--text-tertiary);
    padding: 0;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-color);
}

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

.info-modal-content li {
    margin: 10px 0;
    padding-left: 15px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9em;
}

.info-modal-content li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.color-green {
    color: var(--in-tune-color);
}

.color-yellow {
    color: var(--close-color);
}

.color-red {
    color: var(--out-tune-color);
}

/* Permission Overlay */
.permission-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.permission-dialog {
    background: var(--container-bg);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    max-width: 350px;
}

.permission-dialog h2 {
    color: var(--text-color);
    margin-bottom: 15px;
}

.permission-dialog p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.permission-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1em;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.permission-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

/* Error Message */
.error-message {
    color: #f56565;
    padding: 15px;
    background: rgba(245, 101, 101, 0.1);
    border-radius: 10px;
    margin-top: 15px;
    text-align: center;
}

/* Responsive Design - Mobile full width/height */
@media (max-width: 480px) {
    body {
        padding: 0;
        align-items: stretch;
    }

    .container {
        max-width: 100%;
        width: 100%;
        min-height: 100vh;
        border-radius: 0;
        padding: 15px;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.5em;
    }

    .detected-note {
        font-size: 3em;
    }

    .string-btn {
        padding: 6px 12px;
        font-size: 0.85em;
    }

    .cents-value {
        font-size: 1.5em;
    }

    .gauge-container {
        height: 90px;
    }
}