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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

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

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

header p {
    font-size: 1.1em;
    opacity: 0.95;
}

/* Card Styles */
.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.card h2 {
    margin-bottom: 20px;
    color: #667eea;
    font-size: 1.5em;
}

.error-card {
    border-left: 4px solid #e74c3c;
}

.error-card h2 {
    color: #e74c3c;
}

/* File Input */
.file-input-wrapper {
    margin-bottom: 15px;
}

#file-input {
    display: none;
}

.file-label {
    display: block;
    padding: 20px;
    background: #f8f9fa;
    border: 2px dashed #667eea;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1.1em;
    color: #667eea;
}

.file-label:hover {
    background: #e9ecef;
    border-color: #764ba2;
}

.file-label.file-selected {
    background: #e7f3ff;
    border-color: #28a745;
    border-style: solid;
    color: #28a745;
}

.file-info {
    font-size: 0.9em;
    color: #6c757d;
    text-align: center;
}

/* Buttons */
.btn {
    padding: 15px 40px;
    font-size: 1.1em;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    width: 100%;
    margin-top: 10px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

/* Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 30px;
    background: #e9ecef;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 15px;
}

.progress-text {
    text-align: center;
    color: #667eea;
    font-weight: 600;
    font-size: 1.1em;
}

/* Results */
.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.result-item {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.result-item strong {
    display: block;
    color: #667eea;
    margin-bottom: 8px;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-item span {
    font-size: 1.3em;
    color: #333;
    font-weight: 600;
}

.result-summary {
    background: #e7f3ff;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
    border-left: 4px solid #28a745;
}

.result-summary p {
    line-height: 1.6;
    color: #333;
}

.mfcc-container {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    max-height: 200px;
    overflow-y: auto;
}

.mfcc-values {
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #495057;
    line-height: 1.8;
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.progress-bar {
    animation: pulse 2s infinite;
}

/* Responsive */
@media (max-width: 600px) {
    header h1 {
        font-size: 2em;
    }

    .card {
        padding: 20px;
    }

    .result-grid {
        grid-template-columns: 1fr;
    }
}