/* ═══════════════════════════════════════════════════
   临床工具箱 · Clinical Toolbox Theme
   配色：深蓝 #1a56db / 浅蓝 #e8f0fe / 白底
   ═══════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;
    --primary-border: #bfdbfe;
    --success: #059669;
    --success-bg: #ecfdf5;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --text: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --bg: #f9fafb;
    --bg-white: #ffffff;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --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-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --radius: 8px;
    --radius-lg: 12px;
    --font: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; }

/* ── Navbar ───────────────────────────────────────── */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
    box-shadow: var(--shadow-sm);
}
.navbar-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 60px; padding: 0 1.5rem;
}
.navbar-brand {
    display: flex; align-items: center; gap: 10px;
    font-size: 1.15rem; font-weight: 600; color: var(--primary-dark);
}
.navbar-brand .brand-icon { font-size: 1.5rem; }
.navbar-links { display: flex; gap: 1.5rem; list-style: none; align-items: center; }
.navbar-links a {
    font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
    padding: 6px 0; border-bottom: 2px solid transparent; transition: all 0.2s;
}
.navbar-links a:hover, .navbar-links a.active {
    color: var(--primary); border-bottom-color: var(--primary);
}
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text); }

/* ── Hero ─────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--primary-bg) 0%, #dbeafe 100%);
    padding: 60px 1.5rem; text-align: center;
}
.hero-title { font-size: 2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 0.5rem; }
.hero-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 500px; margin: 0 auto; }

/* ── Section ───────────────────────────────────────── */
.section { max-width: 1200px; margin: 0 auto; padding: 40px 1.5rem; }
.section-header { margin-bottom: 30px; }
.section-title { font-size: 1.4rem; font-weight: 600; color: var(--text); }

/* ── Card Grid ─────────────────────────────────────── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }

.card {
    background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.5rem;
    transition: all 0.2s; cursor: pointer; display: block;
    text-decoration: none; color: inherit;
}
.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-border);
    transform: translateY(-1px);
}
.card-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.card-title { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 0.5rem; }
.card-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }
.card-meta { margin-top: 0.75rem; font-size: 0.8rem; color: var(--text-muted); }

/* ── Category Cards (larger) ───────────────────────── */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem; }

.category-card {
    background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 2rem 1.5rem;
    text-align: center; transition: all 0.2s; display: block;
    text-decoration: none; color: inherit;
}
.category-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-border);
    transform: translateY(-2px);
}
.category-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.category-name { font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 0.5rem; }
.category-desc { font-size: 0.85rem; color: var(--text-secondary); }
.category-count { margin-top: 0.75rem; font-size: 0.8rem; color: var(--primary); font-weight: 500; }

/* ── Calculator ────────────────────────────────────── */
.calculator-container {
    max-width: 700px; margin: 0 auto;
    background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 2rem;
}
.calc-header { margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.calc-title { font-size: 1.3rem; font-weight: 600; color: var(--text); }
.calc-desc { font-size: 0.9rem; color: var(--text-secondary); margin-top: 0.5rem; }

.form-group { margin-bottom: 1rem; }
.form-label {
    display: block; font-size: 0.85rem; font-weight: 500;
    color: var(--text-secondary); margin-bottom: 0.35rem;
}
.form-label .unit { font-weight: 400; color: var(--text-muted); }

.form-input, .form-select {
    width: 100%; padding: 10px 14px;
    border: 1px solid var(--border); border-radius: 6px;
    font-size: 0.95rem; font-family: var(--font);
    color: var(--text); background: var(--bg-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus, .form-select:focus {
    outline: none; border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.form-input::placeholder { color: var(--text-muted); }

/* Result box */
.result-box {
    margin-top: 1.5rem; padding: 1.25rem;
    background: var(--success-bg); border: 1px solid #a7f3d0;
    border-radius: var(--radius); text-align: center;
}
.result-label { font-size: 0.8rem; color: var(--success); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.25rem; }
.result-value { font-size: 2rem; font-weight: 700; color: var(--success); }
.result-unit { font-size: 1rem; color: var(--success); font-weight: 400; }

.error-box {
    margin-top: 1.5rem; padding: 1rem;
    background: var(--danger-bg); border: 1px solid #fecaca;
    border-radius: var(--radius); color: var(--danger); font-size: 0.9rem;
}

/* ── Buttons ───────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 24px; font-size: 0.9rem; font-weight: 500;
    border-radius: 6px; border: 1px solid transparent;
    cursor: pointer; transition: all 0.2s; font-family: var(--font);
}
.btn-primary {
    background: var(--primary); color: white; border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
    background: white; color: var(--primary); border-color: var(--border);
}
.btn-outline:hover { border-color: var(--primary); background: var(--primary-bg); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

/* ── File List ─────────────────────────────────────── */
.file-list { list-style: none; }
.file-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; border: 1px solid var(--border); border-radius: 6px;
    margin-bottom: 0.5rem; transition: background 0.2s;
}
.file-item:hover { background: var(--primary-bg); }
.file-info { display: flex; align-items: center; gap: 10px; }
.file-icon { font-size: 1.5rem; }
.file-name { font-weight: 500; font-size: 0.9rem; }
.file-size { font-size: 0.8rem; color: var(--text-muted); }
.file-downloads { font-size: 0.75rem; color: var(--text-muted); }

/* ── Content/Reference ─────────────────────────────── */
.content-section {
    max-width: 700px; margin: 0 auto; padding: 2rem 0;
    font-size: 0.95rem; line-height: 1.8;
}
.content-section h2, .content-section h3 { color: var(--primary-dark); margin: 1.5rem 0 0.75rem; }
.content-section p { margin-bottom: 1rem; }
.content-section ul, .content-section ol { margin: 0.75rem 0 1.25rem 1.5rem; }
.content-section li { margin-bottom: 0.4rem; }
.content-section table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.content-section th, .content-section td {
    padding: 8px 12px; border: 1px solid var(--border); font-size: 0.85rem;
}
.content-section th { background: var(--primary-bg); color: var(--primary-dark); font-weight: 600; }
.content-section blockquote {
    border-left: 3px solid var(--primary); padding: 0.75rem 1rem;
    background: var(--primary-bg); margin: 1rem 0; border-radius: 0 6px 6px 0;
    color: var(--text-secondary); font-style: italic;
}
.content-section code {
    background: #f1f5f9; padding: 2px 6px; border-radius: 4px;
    font-size: 0.85em; color: var(--primary-dark);
}
.content-section pre {
    background: #1e293b; color: #e2e8f0; padding: 1rem; border-radius: 8px;
    overflow-x: auto; font-size: 0.85rem; margin: 1rem 0;
}

/* ── Admin ─────────────────────────────────────────── */
.admin-body { background: var(--bg); }
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px; background: var(--bg-white);
    border-right: 1px solid var(--border); padding: 1.5rem 1rem;
    position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto;
}
.admin-sidebar-title { font-size: 1.1rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.admin-sidebar-nav { list-style: none; }
.admin-sidebar-nav a {
    display: block; padding: 8px 12px; font-size: 0.9rem;
    color: var(--text-secondary); border-radius: 6px; margin-bottom: 2px;
    transition: all 0.2s;
}
.admin-sidebar-nav a:hover, .admin-sidebar-nav a.active {
    background: var(--primary-bg); color: var(--primary);
}
.admin-main { margin-left: 240px; padding: 2rem; flex: 1; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.admin-title { font-size: 1.4rem; font-weight: 600; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card {
    background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.25rem; text-align: center;
}
.stat-number { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* Admin table */
.admin-table { width: 100%; border-collapse: collapse; background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.admin-table th, .admin-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border-light); font-size: 0.88rem; }
.admin-table th { background: var(--primary-bg); color: var(--primary-dark); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
.admin-table tr:hover td { background: #f8fafc; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 0.75rem; font-weight: 500; }
.badge-published { background: var(--success-bg); color: var(--success); }
.badge-draft { background: var(--warning-bg); color: var(--warning); }

/* Admin forms */
.admin-form { max-width: 800px; }
.admin-form .form-group { margin-bottom: 1.25rem; }
.admin-form textarea.form-input { min-height: 100px; resize: vertical; font-family: monospace; font-size: 0.85rem; }
.admin-form textarea.form-input.tall { min-height: 200px; }

/* Field row in tool editor */
.field-row {
    display: grid; grid-template-columns: 1fr 1fr 80px 100px 80px 60px;
    gap: 0.5rem; align-items: end; margin-bottom: 0.5rem;
    padding: 0.75rem; background: var(--bg); border-radius: 6px;
}
.field-row .form-group { margin-bottom: 0; }
.field-row .form-input { padding: 8px 10px; font-size: 0.85rem; }

.field-actions { display: flex; gap: 0.25rem; }
.btn-icon { padding: 6px 10px; font-size: 0.85rem; border-radius: 4px; }

/* Flash messages */
.flash { padding: 10px 16px; border-radius: 6px; margin-bottom: 0.75rem; font-size: 0.9rem; border-left: 3px solid; }
.flash-success { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.flash-error { background: var(--danger-bg); border-color: var(--danger); color: var(--danger); }
.flash-info { background: var(--primary-bg); border-color: var(--primary); color: var(--primary-dark); }

/* Login */
.login-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--primary-bg); }
.login-box {
    width: 380px; background: var(--bg-white); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 2.5rem; box-shadow: var(--shadow-md);
}
.login-title { font-size: 1.3rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 0.5rem; text-align: center; }
.login-subtitle { font-size: 0.85rem; color: var(--text-muted); text-align: center; margin-bottom: 1.5rem; }
.login-box .btn { width: 100%; justify-content: center; margin-top: 0.5rem; }

/* Footer */
.footer { text-align: center; padding: 2rem; color: var(--text-muted); font-size: 0.8rem; border-top: 1px solid var(--border); margin-top: 3rem; }

/* Breadcrumb */
.breadcrumb { display: flex; gap: 0.5rem; align-items: center; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .navbar-links { display: none; }
    .menu-toggle { display: block; }
    .card-grid, .category-grid { grid-template-columns: 1fr; }
    .calculator-container { padding: 1.25rem; }
    .admin-sidebar { display: none; }
    .admin-main { margin-left: 0; }
    .field-row { grid-template-columns: 1fr 1fr; }
}