:root{--bg: #f6f7f9;--surface: #ffffff;--border: #e3e6ea;--text: #1a2230;--muted: #5c6675;--brand: #2f6bff;--brand-soft: #eaf0ff;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);--radius: 14px}@media(prefers-color-scheme:dark){:root{--bg: #0f1420;--surface: #161d2b;--border: #26303f;--text: #e8ecf2;--muted: #9aa6b6;--brand: #6b95ff;--brand-soft: #1b2438;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.app-shell{min-height:100%;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--surface)}.app-header .brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.01em}.app-header .brand .dot{width:26px;height:26px;border-radius:8px;background:var(--brand);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:800}.app-nav{display:flex;gap:6px}.app-nav a{padding:7px 12px;border-radius:8px;color:var(--muted);font-size:14px;font-weight:500}.app-nav a.active,.app-nav a:hover{background:var(--brand-soft);color:var(--brand)}.page{width:100%;max-width:960px;margin:0 auto;padding:40px 24px 64px;flex:1}.page-title{font-size:30px;font-weight:750;letter-spacing:-.02em;margin:0 0 6px}.page-subtitle{color:var(--muted);font-size:16px;margin:0 0 32px}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .12s ease,border-color .12s ease}.card:hover{transform:translateY(-2px);border-color:var(--brand)}.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.badge{display:inline-block;margin-bottom:20px;padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600}.placeholder-note{margin-top:28px;padding:16px 18px;border:1px dashed var(--border);border-radius:var(--radius);color:var(--muted);font-size:14px;background:var(--surface)}.back-link{display:inline-block;margin-bottom:20px;color:var(--brand);font-size:14px;font-weight:500}