:root{
  --bg:#f1f5f9; --card:#fff; --ink:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --primary:#2563eb; --primary-ink:#fff; --danger:#dc2626; --ok:#16a34a;
  --sidebar:#0f172a; --sidebar-ink:#cbd5e1;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.5}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
code{background:#f1f5f9;padding:1px 5px;border-radius:5px;font-size:.9em}
.muted{color:var(--muted)} .small{font-size:12.5px} .right{text-align:right}

/* ---------- Layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--sidebar);color:var(--sidebar-ink);padding:18px 14px;flex:0 0 auto}
.sidebar .brand{color:#fff;font-weight:700;font-size:18px;padding:6px 10px 18px}
.nav a{display:flex;align-items:center;gap:10px;color:var(--sidebar-ink);padding:10px 12px;border-radius:9px;margin-bottom:3px;font-weight:500}
.nav a:hover{background:rgba(255,255,255,.07);text-decoration:none;color:#fff}
.nav a.active{background:var(--primary);color:#fff}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:60px;background:var(--card);border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;padding:0 24px}
.topbar h1{font-size:18px;margin:0}
.topbar .user{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px}
.content{padding:24px;max-width:1100px;width:100%}

/* ---------- Cards & stats ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:18px}
.card h2{margin:0 0 14px;font-size:15px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.stat .num{font-size:28px;font-weight:700}
.stat .lbl{color:var(--muted);font-size:12.5px;margin-top:2px}
@media(max-width:820px){.stat-grid{grid-template-columns:repeat(2,1fr)}.sidebar{width:64px}.sidebar .brand,.nav a span{display:none}}

/* ---------- Tables ---------- */
.table{width:100%;border-collapse:collapse}
.table th,.table td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.table th{font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);font-weight:600}
.table tr:last-child td{border-bottom:0}
.table .right{text-align:right}

/* ---------- Buttons ---------- */
.btn{display:inline-block;border:1px solid var(--line);background:var(--card);color:var(--ink);
  padding:9px 15px;border-radius:9px;font-size:13.5px;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{text-decoration:none;border-color:#cbd5e1}
.btn-primary{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.btn-danger{background:var(--danger);border-color:var(--danger);color:#fff}
.btn-sm{padding:6px 11px;font-size:12.5px}
.btn-block{display:block;width:100%;text-align:center;margin-top:6px}
.row-actions{display:flex;gap:8px;justify-content:flex-end}

/* ---------- Forms ---------- */
.field{display:block;margin-bottom:14px}
.field>span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:5px;font-weight:600}
.input,select,textarea{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font-size:14px;
  font-family:inherit;background:#fff;color:var(--ink)}
.input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:var(--primary)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:620px){.grid2{grid-template-columns:1fr}}
.switch-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.switch-row:last-child{border-bottom:0}
.switch-row input{width:18px;height:18px}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:11.5px;font-weight:600}
.badge-on{background:#dcfce7;color:#166534} .badge-off{background:#fee2e2;color:#991b1b}

/* ---------- Flash ---------- */
.flash{padding:11px 14px;border-radius:10px;margin-bottom:16px;font-size:13.5px}
.flash.ok{background:#dcfce7;color:#166534} .flash.err{background:#fee2e2;color:#991b1b}

/* ---------- Snippet ---------- */
.snippet{position:relative;background:#0f172a;color:#e2e8f0;border-radius:10px;padding:16px 16px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;white-space:pre-wrap;word-break:break-all}
.snippet .copy{position:absolute;top:10px;right:10px}

/* ---------- Chart ---------- */
.chart{display:flex;align-items:flex-end;gap:6px;height:140px;padding-top:10px}
.chart .bar{flex:1;background:linear-gradient(180deg,#60a5fa,#2563eb);border-radius:5px 5px 0 0;min-height:2px;position:relative}
.chart .bar small{position:absolute;bottom:-20px;left:0;right:0;text-align:center;color:var(--muted);font-size:10px}
.split{display:flex;gap:16px} .split>*{flex:1}
@media(max-width:820px){.split{flex-direction:column}}

/* ---------- Login / install ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.login-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:30px;width:100%;max-width:380px;
  box-shadow:0 10px 40px rgba(2,6,23,.08)}
.login-logo{font-size:22px;font-weight:700;margin-bottom:4px}
.login-card h1{font-size:18px;margin:0 0 18px}
.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.page-head h2{margin:0;font-size:20px}