/**
 * 学术配图提示词生成器 V2.0 - 样式表
 */

/* ========== CSS Variables ========== */
:root {
    --primary: #2563EB;
    --primary-light: #DBEAFE;
    --primary-dark: #1D4ED8;
    --secondary: #F97316;
    --secondary-light: #FFEDD5;
    --success: #16A34A;
    --success-light: #DCFCE7;
    
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.1);
}

/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== Layout ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

header {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px 0;
}

header h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

header p {
    color: var(--gray-500);
    font-size: 15px;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Card ========== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-title .badge {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
}

.badge-required {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-optional {
    background: var(--gray-100);
    color: var(--gray-500);
}

/* ========== Category Selector ========== */
.category-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: white;
    cursor: pointer;
    transition: all 0.15s;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
}

.category-tab:hover {
    border-color: var(--gray-300);
    background: var(--gray-50);
}

.category-tab.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.category-tab .icon {
    margin-right: 6px;
}

.subcategory-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

@media (max-width: 600px) {
    .subcategory-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Radio/Checkbox Options ========== */
.option-item {
    position: relative;
}

.option-item input[type="radio"],
.option-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.option-item label {
    display: block;
    padding: 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    background: white;
}

.option-item label:hover {
    border-color: var(--gray-300);
    background: var(--gray-50);
}

.option-item input:checked + label {
    border-color: var(--primary);
    background: var(--primary-light);
}

.option-item .name {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 2px;
}

.option-item .desc {
    font-size: 11px;
    color: var(--gray-500);
    line-height: 1.4;
}

/* ========== Option Grid ========== */
.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.option-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 600px) {
    .option-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== Color Theme Selector ========== */
.color-theme-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.color-theme-item {
    position: relative;
}

.color-theme-item input {
    position: absolute;
    opacity: 0;
}

.color-theme-item label {
    display: block;
    padding: 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.color-theme-item label:hover {
    border-color: var(--gray-300);
}

.color-theme-item input:checked + label {
    border-color: var(--primary);
    background: var(--primary-light);
}

.color-theme-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.color-theme-source {
    font-size: 10px;
    color: var(--gray-400);
    margin-bottom: 8px;
}

.color-preview {
    display: flex;
    gap: 3px;
}

.color-dot {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
}

/* ========== Color Count Selector ========== */
.color-count-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.color-count-label {
    font-size: 12px;
    color: var(--gray-600);
    margin-bottom: 10px;
}

.color-count-options {
    display: flex;
    gap: 8px;
}

.color-count-btn {
    width: 44px;
    height: 44px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: white;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.15s;
}

.color-count-btn:hover {
    border-color: var(--gray-300);
    background: var(--gray-50);
}

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

.selected-colors-preview {
    margin-top: 12px;
    padding: 10px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
}

.selected-colors-preview .label {
    font-size: 11px;
    color: var(--gray-500);
    margin-bottom: 6px;
}

.selected-colors-list {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.selected-color-chip {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: white;
    border-radius: 4px;
    font-size: 11px;
    color: var(--gray-600);
}

.selected-color-chip .dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* ========== Checkbox Grid ========== */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 4px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.checkbox-item:hover {
    background: var(--gray-100);
}

.checkbox-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.checkbox-item span {
    font-size: 12px;
    color: var(--gray-600);
}

/* ========== Section Divider ========== */
.section-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0 12px;
    color: var(--gray-400);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

/* ========== Textarea ========== */
.textarea-wrapper textarea {
    width: 100%;
    min-height: 180px;
    padding: 14px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.15s;
    line-height: 1.6;
}

.textarea-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.textarea-wrapper textarea::placeholder {
    color: var(--gray-400);
}

/* ========== Buttons ========== */
.generate-btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: 16px;
}

.generate-btn:hover {
    background: var(--primary-dark);
}

.generate-btn:active {
    transform: scale(0.99);
}

/* ========== Output Section ========== */
.output-section {
    position: sticky;
    top: 24px;
}

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

.output-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
}

.copy-btn {
    padding: 6px 12px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.copy-btn:hover {
    background: var(--gray-200);
}

.copy-btn.copied {
    background: var(--success-light);
    border-color: var(--success);
    color: var(--success);
}

.output-content {
    background: var(--gray-900);
    border-radius: var(--radius);
    padding: 16px;
    min-height: 500px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.output-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: "SF Mono", Monaco, "Consolas", monospace;
    font-size: 13px;
    line-height: 1.7;
    color: var(--gray-300);
}

.output-content .placeholder {
    color: var(--gray-500);
    font-style: italic;
    text-align: center;
    padding: 60px 20px;
}

/* Syntax Highlighting */
.hl-heading { color: #60A5FA; font-weight: 600; }
.hl-emphasis { color: #F472B6; }
.hl-bullet { color: var(--secondary); }
.hl-code { color: #34D399; }
.hl-color { color: #FBBF24; background: rgba(251,191,36,0.1); padding: 1px 4px; border-radius: 3px; }

/* Scrollbar */
.output-content::-webkit-scrollbar {
    width: 6px;
}

.output-content::-webkit-scrollbar-track {
    background: transparent;
}

.output-content::-webkit-scrollbar-thumb {
    background: var(--gray-600);
    border-radius: 3px;
}

/* ========== Footer ========== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--gray-400);
    font-size: 12px;
}

/* ========== Presets ========== */
.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.preset-btn {
    padding: 8px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: white;
    font-size: 12px;
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.15s;
}

.preset-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.preset-btn.active {
    background: var(--secondary-light);
    border-color: var(--secondary);
    color: var(--secondary);
}