/* Modern CSS for ML Lyrics Generation Web App */

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

* {
    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, #0f172a 0%, #1e293b 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Cards and Sections */
.model-status,
.model-management,
.generation-section,
.results-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.model-info {
    color: var(--text-muted);
    font-size: 0.95rem;
    text-align: center;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 15px 0;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.alert code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
}

/* Upload Section */
.upload-section {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.upload-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(99, 102, 241, 0.1);
    border: 2px dashed rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-color);
}

.upload-label:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

.upload-icon {
    font-size: 1.2rem;
}

.status-message {
    margin-top: 15px;
}

/* Form Elements */
.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-help {
    display: block;
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.slider {
    flex: 1;
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--primary-dark);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-value {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    min-width: 40px;
    text-align: right;
}

/* Advanced Parameters */
.advanced-section {
    margin: 25px 0;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.btn-toggle {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
}

.btn-toggle:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

#advanced-params {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.lambda-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.lambda-item {
    display: flex;
    flex-direction: column;
}

.lambda-item label {
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.lambda-input {
    width: 100%;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.lambda-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

/* Results Section */
.generated-text {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    white-space: pre-wrap;
    word-wrap: break-word;
}

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

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--secondary-color);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section {
    animation: fadeIn 0.5s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .upload-section {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .result-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .model-status,
    .model-management,
    .generation-section,
    .results-section {
        padding: 20px;
    }

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

    header h1 {
        font-size: 1.75rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}