:root {
  --primary: #0b7fd3;
  --primary-dark: #065ea3;
  --primary-soft: #e7f4ff;
  --bg: #f3f8fd;
  --text: #12324a;
  --text-soft: #4f6b80;
  --muted: #8aa0b3;
  --line: #d7e6f3;
  --white: #ffffff;
  --success: #1b8a4a;
  --success-soft: #e5f7ec;
  --danger: #de3a3a;
  --danger-soft: #fdecee;
  --warning: #c47b00;
  --warning-soft: #fff4d8;
  --shadow: 0 10px 30px rgba(18, 50, 74, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Nunito", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 250px;
  background: linear-gradient(180deg, #065ea3 0%, #0b7fd3 100%);
  color: white;
  padding: 24px 18px;
  flex-shrink: 0;
}
.brand { font-weight: 800; font-size: 22px; margin-bottom: 6px; }
.brand-sub { opacity: 0.8; font-size: 13px; margin-bottom: 28px; }
.nav a {
  display: block;
  color: white;
  padding: 11px 12px;
  border-radius: 12px;
  margin-bottom: 6px;
  font-weight: 700;
}
.nav a:hover, .nav a.is-active { background: rgba(255,255,255,0.16); color: white; }
.content { flex: 1; padding: 28px; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}
h1 { margin: 0; font-size: 28px; }
.lead { color: var(--text-soft); margin: 6px 0 0; }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.grid { display: grid; gap: 14px; }
.stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 16px; }
.stat b { display: block; font-size: 26px; margin-top: 4px; }
.stat span { color: var(--text-soft); font-weight: 700; font-size: 13px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--text-soft); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.row-actions { display: flex; gap: 8px; }

.btn, button.btn, input[type="submit"].btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 800;
  cursor: pointer;
  font-size: 14px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); color: white; }
.btn-ghost { background: var(--primary-soft); color: var(--primary-dark); }
.btn-danger { background: var(--danger-soft); color: var(--danger); }
.btn-sm { padding: 7px 10px; font-size: 13px; }

.form { max-width: 640px; }
label { display: block; font-weight: 800; margin: 14px 0 6px; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  min-height: 46px;
  padding: 10px 12px;
  font: inherit;
  background: #fbfdfe;
  color: var(--text);
}
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.error { color: var(--danger); font-size: 13px; font-weight: 700; margin-top: 6px; }
.flash {
  background: var(--success-soft);
  color: var(--success);
  padding: 12px 14px;
  border-radius: 12px;
  font-weight: 800;
  margin-bottom: 16px;
}
.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 800;
}
.badge-on { background: var(--success-soft); color: var(--success); }
.badge-off { background: var(--danger-soft); color: var(--danger); }
.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--primary-soft);
  color: var(--primary-dark);
  padding: 3px 8px;
  border-radius: 8px;
  font-weight: 800;
}
.toolbar { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .field { min-width: 180px; }
.tabs { display: flex; gap: 8px; background: white; padding: 4px; border-radius: 16px; border: 1px solid var(--line); margin: 12px 0 16px; width: fit-content; }
.tabs a { padding: 8px 14px; border-radius: 12px; color: var(--text-soft); font-weight: 800; }
.tabs a.is-active { background: var(--primary-soft); color: var(--primary-dark); }
.muted { color: var(--text-soft); }
.empty { text-align: center; padding: 32px; color: var(--text-soft); }
.pager { display: flex; gap: 10px; align-items: center; margin-top: 16px; }
.pager-btn { background: var(--primary-soft); color: var(--primary-dark); padding: 8px 12px; border-radius: 10px; font-weight: 800; }
.pager-btn.is-disabled { opacity: 0.45; pointer-events: none; }
.guest {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #e7f4ff 0%, #f3f8fd 100%);
  padding: 24px;
}
.guest-card { width: min(420px, 100%); }
.logout { background: transparent; border: 0; color: white; font: inherit; font-weight: 800; cursor: pointer; padding: 11px 12px; }
@media (max-width: 900px) {
  .shell { display: block; }
  .sidebar { width: auto; }
  .stats { grid-template-columns: 1fr 1fr; }
  .content { padding: 16px; }
}