/* AI检测助手 - 样式表 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #1a56db;
    --primary-light: #e8f0fe;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    min-height: 100vh;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 100%);
    color: white;
    padding: 0 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon { font-size: 32px; }
.logo h1 { font-size: 20px; font-weight: 700; }
.logo .subtitle { font-size: 12px; opacity: .8; margin-top: 2px; }

.nav { display: flex; gap: 8px; }
.nav-btn {
    padding: 8px 20px;
    border: 2px solid rgba(255,255,255,.3);
    border-radius: 8px;
    background: transparent;
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s;
}
.nav-btn:hover { background: rgba(255,255,255,.15); }
.nav-btn.active {
    background: white;
    color: var(--primary);
    border-color: white;
}

/* Main */
.main { max-width: 900px; margin: 0 auto; padding: 32px 24px; min-height: calc(100vh - 72px); display: flex; flex-direction: column; }

.tab-content { display: none; }
.tab-content.active { display: flex; flex-direction: column; flex: 1; }

.card {
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    flex: 1;
    display: flex;
    flex-direction: column;
}
.card h2 { font-size: 22px; margin-bottom: 8px; }
.card .desc { color: var(--gray-600); font-size: 14px; margin-bottom: 24px; line-height: 1.6; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-200);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color .2s;
    resize: vertical;
}
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: #1547b8; transform: translateY(-1px); }

/* Upload */
.upload-zone {
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    margin-bottom: 16px;
}
.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.upload-icon { font-size: 48px; margin-bottom: 12px; }
.upload-zone p { color: var(--gray-600); margin: 4px 0; }
.upload-hint { font-size: 12px; opacity: .7; }

.preview-img {
    max-width: 300px;
    max-height: 200px;
    border-radius: 8px;
    margin-bottom: 8px;
    display: block;
}
.file-name { font-size: 13px; color: var(--gray-600); }
.diagram-img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    margin-top: 8px;
}

.upload-group {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}
.upload-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}
.upload-item label { font-weight: 600; font-size: 14px; min-width: 120px; }
.upload-item input[type="file"] { flex: 1; font-size: 13px; }
.file-label { font-size: 12px; color: var(--success); }

/* Results */
.result-area {
    margin-top: 24px;
    padding: 24px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}
.result-area h3 { margin-bottom: 12px; font-size: 17px; }
.result-area h4 { margin: 16px 0 8px; font-size: 15px; }

.answer-content {
    line-height: 1.8;
    font-size: 14px;
    overflow-wrap: break-word;
}

/* Markdown 渲染样式 */
.answer-content h1 { font-size: 20px; font-weight: 700; margin: 20px 0 10px; padding-bottom: 6px; border-bottom: 2px solid var(--gray-200); }
.answer-content h2 { font-size: 17px; font-weight: 700; margin: 18px 0 8px; color: var(--primary); }
.answer-content h3 { font-size: 15px; font-weight: 600; margin: 14px 0 6px; }
.answer-content p { margin: 8px 0; }
.answer-content ul, .answer-content ol { padding-left: 22px; margin: 8px 0; }
.answer-content li { margin: 4px 0; }
.answer-content strong { color: var(--gray-800); }
.answer-content code {
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: #c7254e;
}
.answer-content pre {
    background: var(--gray-800);
    color: #e5e7eb;
    padding: 14px 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
    font-size: 13px;
    line-height: 1.6;
}
.answer-content pre code { background: none; color: inherit; padding: 0; }
.answer-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 13px;
}
.answer-content th, .answer-content td {
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    text-align: left;
}
.answer-content th {
    background: var(--primary-light);
    font-weight: 600;
}
.answer-content tr:nth-child(even) td { background: var(--gray-50); }
.answer-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 8px 16px;
    margin: 12px 0;
    background: var(--primary-light);
    border-radius: 0 8px 8px 0;
    color: var(--gray-600);
}
.answer-content hr { border: none; border-top: 1px solid var(--gray-200); margin: 16px 0; }
.sources { margin-top: 16px; font-size: 13px; color: var(--gray-600); }

/* 审核进度步骤 */
.review-progress { margin-bottom: 16px; }
.step-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    margin: 4px 0;
    border-radius: 8px;
    font-size: 13px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    transition: all .3s;
}
.step-active {
    background: #eff6ff;
    border-color: var(--primary);
    color: var(--primary);
}
.step-done {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: var(--success);
}
.step-num {
    font-weight: 700;
    min-width: 30px;
}
.step-name { flex: 1; font-weight: 500; }
.step-status { font-size: 12px; }

.review-header { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.conclusion-badge {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
}
.conclusion-pass { background: #d1fae5; color: var(--success); }
.conclusion-modify { background: #fef3c7; color: var(--warning); }
.conclusion-reject { background: #fee2e2; color: var(--danger); }
.total-issues { font-size: 14px; color: var(--gray-600); }

.report-content {
    white-space: pre-wrap;
    line-height: 1.8;
    font-size: 14px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

/* Split analysis table */
.component-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin-top: 12px;
}
.component-table th,
.component-table td {
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    text-align: left;
}
.component-table th {
    background: var(--primary-light);
    font-weight: 600;
    font-size: 12px;
}
.component-table td { background: white; }

/* Responsive */
@media (max-width: 768px) {
    .header-inner { flex-direction: column; height: auto; padding: 16px 0; gap: 12px; }
    .nav { flex-wrap: wrap; justify-content: center; }
    .card { padding: 20px; }
    .upload-item { flex-direction: column; align-items: flex-start; }
}