:root{--bg:#f5f7fb;--surface:#fff;--text:#172033;--muted:#667085;--border:#e4e7ec;--primary:#1d4ed8;--sidebar:#111827}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:10}.brand{font-weight:700;display:flex;align-items:center;gap:10px}.brand-mark{width:44px;height:44px;border-radius:12px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800}.brand-mark.small{width:32px;height:32px;border-radius:8px;font-size:12px}
.top-user{display:flex;gap:18px;align-items:center;font-size:14px}.top-user a{color:var(--primary);font-weight:600}.app-shell{display:flex;min-height:calc(100vh - 64px)}.sidebar{width:245px;background:var(--sidebar);color:#d1d5db;padding:20px 12px}.sidebar nav{display:flex;flex-direction:column;gap:4px}.sidebar a{padding:10px 12px;border-radius:8px;display:flex;justify-content:space-between;font-size:14px}.sidebar a:hover,.sidebar a.active{background:#1f2937;color:#fff}.sidebar a span{font-size:11px;opacity:.55}.nav-section{margin:18px 12px 5px;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#9ca3af}
.content{flex:1;padding:28px;max-width:1600px}.page-header{margin-bottom:22px}h1{margin:0 0 5px;font-size:28px}h2{margin:0 0 10px;font-size:19px}.muted{color:var(--muted)}.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:18px}.kpi-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}.kpi-label{color:var(--muted);font-size:13px}.kpi-value{font-size:30px;font-weight:750;margin:8px 0}
.login-page{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(420px,100%);background:#fff;border:1px solid var(--border);border-radius:16px;padding:32px;box-shadow:0 10px 30px rgba(16,24,40,.08);text-align:center}.login-card .brand-mark{margin:0 auto 14px}.login-card h1{font-size:25px}.login-card form{text-align:left;margin-top:24px}label{display:block;font-size:13px;font-weight:600;margin-bottom:14px}input{width:100%;padding:11px 12px;border:1px solid #d0d5dd;border-radius:8px;margin-top:7px;font:inherit}.btn{border:0;border-radius:8px;padding:11px 16px;font-weight:700;cursor:pointer}.btn.primary{background:var(--primary);color:#fff}.full{width:100%}.alert{padding:10px 12px;border-radius:8px;margin:16px 0;font-size:13px}.alert.error{background:#fef3f2;color:#b42318;border:1px solid #fecdca}.login-note{font-size:12px;color:var(--muted);margin-top:20px}
@media(max-width:900px){.sidebar{width:200px}.kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:650px){.topbar{padding:0 14px}.sidebar{display:none}.content{padding:18px 14px}.kpi-grid{grid-template-columns:1fr}}