* {
    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: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: #6b7280;
    font-size: 0.85rem;
}

.file-upload-wrapper {
    position: relative;
}

input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    z-index: 2;
}

.file-upload-label {
    border: 2px dashed #d1d5db;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    background: #f9fafb;
    transition: all 0.3s ease;
}

.file-upload-label:hover {
    border-color: #667eea;
    background: #f3f4f6;
}

#fileName {
    color: #6b7280;
}

select,
input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    transition: border-color 0.3s ease;
}

select {
    cursor: pointer;
}

select:focus,
input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    padding: 8px 16px;
    background: #f3f4f6;
    color: #333;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

.loader {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 3px solid white;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.progress-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    text-align: center;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
    animation: progress-animation 2s ease-in-out infinite;
}

@keyframes progress-animation {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

#progressText {
    color: #6b7280;
    font-weight: 500;
}

.result-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.result-header h2 {
    color: #333;
    font-size: 1.5rem;
}

.result-actions {
    display: flex;
    gap: 10px;
}

.result-info {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding: 12px;
    background: #f9fafb;
    border-radius: 8px;
    flex-wrap: wrap;
}

.result-info span {
    color: #6b7280;
    font-size: 0.9rem;
}

.result-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 0;
}

.tab-btn {
    padding: 10px 20px;
    background: #f3f4f6;
    color: #6b7280;
    border: 1px solid #e5e7eb;
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: #f9fafb;
    color: #333;
    border-color: #e5e7eb;
}

.tab-btn:hover:not(.active) {
    background: #e5e7eb;
}

.segment-item {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #e5e7eb;
    align-items: flex-start;
}

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

.segment-time {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #667eea;
    font-weight: 600;
    white-space: nowrap;
    min-width: 110px;
}

.segment-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: #1f2937;
}

.transcription-output {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 20px;
    max-height: 500px;
    overflow-y: auto;
}

.transcription-output pre {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #1f2937;
    white-space: pre-wrap;
    word-wrap: break-word;
}

footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    opacity: 0.9;
}

footer p {
    font-size: 0.9rem;
}

@media (max-width: 640px) {
    header h1 {
        font-size: 2rem;
    }

    .card, .result-section, .progress-section {
        padding: 20px;
    }

    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-actions {
        width: 100%;
    }

    .result-actions button {
        flex: 1;
    }

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