:root{
  --bg:#f4f6fb; --card:#ffffff; --ink:#1f2937; --muted:#6b7280;
  --brand:#2563eb; --brand-dark:#1e40af; --line:#e5e7eb;
  --ok:#16a34a; --warn:#d97706; --bad:#dc2626; --radius:14px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 8px 24px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.5}
a{color:var(--brand);text-decoration:none}
.muted{color:var(--muted)} .small{font-size:.82rem}
code{background:#eef2ff;padding:.1em .4em;border-radius:6px;font-size:.85em}

/* ---------- Auth ---------- */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:linear-gradient(135deg,#2563eb,#1e3a8a);padding:20px}
.auth-card{background:var(--card);width:100%;max-width:400px;padding:34px;border-radius:18px;box-shadow:var(--shadow)}
.brand{text-align:center;margin-bottom:18px}
.brand-mark{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:12px;
  background:var(--brand);color:#fff;font-size:24px;margin-bottom:8px}
.auth-card h1{margin:.2rem 0;font-size:1.4rem}
.form label{display:block;margin-bottom:14px;font-weight:600;font-size:.9rem}
.form input{width:100%;margin-top:6px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:1rem;font-weight:400}
.form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.btn{display:inline-block;border:none;cursor:pointer;padding:10px 16px;border-radius:10px;font-size:.95rem;font-weight:600}
.btn-primary{background:var(--brand);color:#fff} .btn-primary:hover{background:var(--brand-dark)}
.btn-block{width:100%} .btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.btn-ghost:hover{background:#f9fafb}
.alert{padding:10px 12px;border-radius:10px;margin-bottom:14px;font-size:.9rem}
.alert-error{background:#fef2f2;color:var(--bad);border:1px solid #fecaca}
.alert-ok{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}

/* forms, toolbar, buttons used across admin CRUD */
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.toolbar .spacer{flex:1}
.btn-sm{padding:6px 11px;font-size:.83rem}
.btn-danger{background:#fee2e2;color:#991b1b}
.btn-danger:hover{background:#fecaca}
.btn-ok{background:#dcfce7;color:#166534}
.btn-link{background:none;color:var(--brand);padding:6px 8px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.form-grid .full{grid-column:1/-1}
.form-card label{display:block;font-weight:600;font-size:.85rem;margin-bottom:4px}
.form-card input,.form-card select,.form-card textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:.95rem;font-family:inherit}
.form-card input:focus,.form-card select:focus,.form-card textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.form-actions{display:flex;gap:10px;margin-top:18px}
.checklist{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.checklist label{display:flex;align-items:center;gap:8px;background:#f8fafc;padding:8px 10px;border-radius:8px;font-weight:500}
.checklist input{width:auto}
.row-actions{display:flex;gap:6px}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
.demo-box{margin-top:20px;padding:12px;background:#f8fafc;border:1px dashed var(--line);border-radius:10px;font-size:.82rem;color:var(--muted)}
.demo-box ul{margin:.4rem 0 0;padding-left:1.1rem}

/* ---------- App layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{width:240px;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;padding:18px 14px;flex-shrink:0}
.sidebar .brand{display:flex;align-items:center;gap:10px;text-align:left;margin-bottom:24px;color:#fff}
.sidebar .brand-mark{width:34px;height:34px;font-size:18px;margin:0}
.brand-name{font-weight:700}
.sidebar nav{display:flex;flex-direction:column;gap:4px;flex:1}
.sidebar nav a{color:#cbd5e1;padding:10px 12px;border-radius:9px;font-weight:500}
.sidebar nav a:hover{background:#1e293b;color:#fff}
.sidebar-foot{display:flex;align-items:center;gap:10px;border-top:1px solid #1e293b;padding-top:14px;margin-top:14px}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.who{color:#fff;font-size:.9rem;font-weight:600}
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:14px;background:var(--card);padding:14px 22px;border-bottom:1px solid var(--line)}
.topbar h1{font-size:1.2rem;margin:0;flex:1}
.hamburger{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer}
.content{padding:22px;flex:1}
.appfoot{padding:14px 22px;border-top:1px solid var(--line)}

/* ---------- Cards / stats ---------- */
.grid{display:grid;gap:16px}
.stats{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.stat .label{color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em}
.stat .value{font-size:1.9rem;font-weight:700;margin-top:4px}
.stat .value.ok{color:var(--ok)} .stat .value.warn{color:var(--warn)} .stat .value.bad{color:var(--bad)}
.section-title{margin:26px 0 12px;font-size:1.05rem}

/* ---------- Tables ---------- */
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);font-size:.9rem}
th{background:#f8fafc;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}
tr:last-child td{border-bottom:none}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:.74rem;font-weight:600}
.badge.ok{background:#dcfce7;color:#166534}
.badge.warn{background:#fef3c7;color:#92400e}
.badge.bad{background:#fee2e2;color:#991b1b}
.badge.info{background:#dbeafe;color:#1e40af}

/* ---------- Responsive ---------- */
@media (max-width:820px){
  .sidebar{position:fixed;inset:0 auto 0 0;transform:translateX(-100%);transition:transform .2s;z-index:50}
  .sidebar.open{transform:translateX(0)}
  .hamburger{display:block}
  .content{padding:16px}
  table{display:block;overflow-x:auto;white-space:nowrap}
}