/* LexiVoice Web UI Styles */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.logo-icon {
    font-size: 48px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo h1 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 18px;
    opacity: 0.9;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-bottom: 40px;
}

section {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.icon {
    font-size: 20px;
}

/* Settings Panel */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.setting-item {
    padding: 16px;
    background: var(--bg-color);
    border-radius: 12px;
}

.setting-item label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.setting-hint {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Checkbox Style */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    background: white;
}

.checkbox-label:hover .checkmark {
    border-color: var(--primary-color);
}

.checkbox-label input:checked ~ .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input:disabled {
    cursor: not-allowed;
}

.checkbox-label input:disabled ~ .checkmark {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-label input:disabled ~ .label-text {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-label:has(input:disabled) {
    cursor: not-allowed;
}

/* Range Input */
.range-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

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

.range-wrapper input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
}

.range-wrapper input[type="number"] {
    width: 80px;
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    transition: border-color 0.2s;
}

.range-wrapper input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.unit {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Preview Panel */
.preview-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    border-radius: 12px;
}

.preview-word {
    display: flex;
    align-items: center;
    gap: 12px;
}

.word-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.word-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Times New Roman', serif;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 16px;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: #94a3b8;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #64748b;
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

.btn-preview.playing {
    background: var(--success-color);
}

.btn-preview.playing .btn-icon {
    animation: bounce 0.5s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

/* Status Bar */
.status-bar {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    background: var(--bg-color);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.status-bar.loading {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.status-bar.success {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.status-bar.error {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Upload Panel */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-color);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 12px;
}

.upload-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 10px;
    margin-top: 16px;
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
}

.word-count {
    color: var(--success-color);
    font-weight: 500;
}

.word-list-preview {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 12px;
}

.word-list-preview h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.word-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.word-tag {
    padding: 6px 14px;
    background: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

/* Generate Section */
.generate-section {
    text-align: center;
    padding: 32px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #8b5cf6 100%);
    border-radius: 16px;
}

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

.btn-generate:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* Results Section */
.results-section {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.results-count {
    font-weight: 600;
    color: var(--success-color);
    font-size: 16px;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-color);
    border-radius: 10px;
    transition: all 0.2s;
}

.result-item:hover {
    background: #f1f5f9;
}

.result-word {
    display: flex;
    align-items: center;
    gap: 16px;
}

.result-word-en {
    font-weight: 600;
    font-size: 16px;
}

.result-word-cn {
    color: var(--text-secondary);
    font-size: 14px;
}

.result-actions {
    display: flex;
    gap: 8px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 14px 28px;
    background: var(--text-primary);
    color: white;
    border-radius: 10px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: var(--success-color);
}

.toast.error {
    background: var(--danger-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 12px;
    }

    .logo h1 {
        font-size: 32px;
    }

    section {
        padding: 20px;
    }

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

    .preview-content {
        flex-direction: column;
    }

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

    .result-item {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .result-actions {
        width: 100%;
    }

    .result-actions .btn {
        flex: 1;
    }
}

/* Scrollbar */
.results-list::-webkit-scrollbar {
    width: 8px;
}

.results-list::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 4px;
}

.results-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.results-list::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}

/* Progress Bar */
.progress-container {
    margin-top: 16px;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-primary);
    text-align: center;
}