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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    opacity: 0.9;
    font-size: 1.1rem;
}

main {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn.primary {
    background: #4CAF50;
    color: white;
}

.btn.secondary {
    background: #f44336;
    color: white;
}

.btn:not(.primary):not(.secondary) {
    background: #e0e0e0;
    color: #333;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn.calibrate {
    background: #9C27B0;
    color: white;
}

.calibration-panel {
    background: #f0f8ff;
    border: 2px solid #667eea;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.calibration-panel h3 {
    color: #667eea;
    margin-bottom: 15px;
    text-align: center;
}

.calibration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.setting-group label {
    font-weight: bold;
    color: #333;
}

.setting-group select,
.setting-group input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
}

.freq-inputs {
    display: flex;
    align-items: center;
    gap: 10px;
}

.freq-inputs input {
    width: 80px;
}

.calibration-test {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.test-controls {
    display: flex;
    gap: 10px;
}

.calibration-results {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.tick-counter,
.time-remaining {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 4px;
}

.tick-counter .count {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
}

.time-remaining .time {
    font-size: 1.2rem;
    font-weight: bold;
    color: #666;
}

.calibration-advice {
    padding: 10px;
    background: #e8f5e8;
    border-left: 4px solid #4CAF50;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #2e7d32;
}

.calibration-advice.warning {
    background: #fff3e0;
    border-left-color: #FFC107;
    color: #f57c00;
}

.calibration-advice.error {
    background: #ffebee;
    border-left-color: #f44336;
    color: #c62828;
}

.status {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.audio-level {
    margin-bottom: 15px;
}

.level-bar {
    width: 100%;
    height: 20px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 5px;
}

.level-fill {
    height: 100%;
    background: linear-gradient(90deg, #4CAF50, #FFC107, #f44336);
    width: 0%;
    transition: width 0.1s ease;
}

.threshold-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.threshold-control input {
    flex: 1;
}

.settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: center;
}

.detection-method select {
    padding: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
}

.progress-display {
    text-align: center;
    padding: 20px;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: #e0e0e0;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 1.1rem;
    font-weight: bold;
    color: #667eea;
}

.current-result {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px solid #667eea;
}

.result-summary {
    text-align: center;
}

.total-deviation {
    margin-bottom: 20px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 2px solid #e0e0e0;
}

.total-deviation .label {
    display: block;
    font-size: 1rem;
    color: #666;
    margin-bottom: 5px;
}

.total-deviation .value {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #333;
}

.total-deviation .value.good {
    color: #4CAF50;
}

.total-deviation .value.moderate {
    color: #FFC107;
}

.total-deviation .value.poor {
    color: #f44336;
}

.tick-breakdown {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.tick-result {
    padding: 10px;
    background: white;
    border-radius: 6px;
    text-align: center;
}

.tick-result .label {
    display: block;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 5px;
}

.tick-result .value {
    display: block;
    font-size: 1.3rem;
    font-weight: bold;
}

.tick-result .value.positive {
    color: #f44336;
}

.tick-result .value.negative {
    color: #4CAF50;
}

.measurements {
    display: grid;
    gap: 30px;
}

.current-measurement h3,
.history h3 {
    margin-bottom: 15px;
    color: #333;
    border-bottom: 2px solid #667eea;
    padding-bottom: 5px;
}

.tick-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.tick {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.tick.active {
    border-color: #667eea;
    background: #e8f0fe;
}

.tick .label {
    display: block;
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #667eea;
}

.tick .time {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.tick .deviation {
    display: block;
    font-size: 1rem;
    font-weight: bold;
}

.tick .deviation.positive {
    color: #f44336;
}

.tick .deviation.negative {
    color: #4CAF50;
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: 15px;
    padding: 15px;
    border-bottom: 1px solid #e0e0e0;
    align-items: center;
    background: #fafafa;
    border-radius: 8px;
    margin-bottom: 10px;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item .index {
    font-weight: bold;
    color: #667eea;
    font-size: 1.1rem;
}

.history-item .timestamp {
    font-size: 0.9rem;
    color: #666;
}

.history-item .total-dev {
    font-weight: bold;
    font-size: 1.1rem;
}

.history-item .total-dev.good {
    color: #4CAF50;
}

.history-item .total-dev.moderate {
    color: #FFC107;
}

.history-item .total-dev.poor {
    color: #f44336;
}

.history-item .breakdown {
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 600px) {
    .settings-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .tick-breakdown {
        grid-template-columns: 1fr;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .history-item {
        grid-template-columns: 1fr;
        gap: 8px;
        text-align: center;
    }
}