:root{--brand-primary: #0d9488;--brand-secondary: #134e4a;--bg: #0f172a;--card: #1e293b;--text: #f8fafc;--muted: #94a3b8}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--brand-primary);text-decoration:none}.muted{color:var(--muted);font-size:.9rem}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;border-bottom:1px solid #334155}.app-nav{display:flex;gap:.5rem;padding:.75rem 1rem;flex-wrap:wrap}.app-nav a{padding:.4rem .75rem;border-radius:8px;color:var(--muted)}.app-nav a.active{background:var(--brand-primary);color:#fff}.app-main{padding:1rem 1.25rem 2rem;flex:1}.card{background:var(--card);border-radius:12px;padding:1rem 1.25rem;margin-bottom:1rem;border:1px solid #334155}.btn,button.btn{background:var(--brand-primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:8px;cursor:pointer}.btn-ghost{background:transparent;color:var(--muted);border:1px solid #475569}input,textarea,select{width:100%;padding:.5rem;border-radius:8px;border:1px solid #475569;background:#0f172a;color:var(--text);margin-top:.25rem}.grid-2{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.stat{font-size:1.75rem;font-weight:700;color:var(--brand-primary)}