:root {
  --navy-950: #0b1220;
  --navy-900: #101a2c;
  --navy-800: #16223a;
  --navy-700: #1d2c49;
  --accent: #15b8a6;
  --accent-dark: #0e9384;
  --accent-soft: #e6fbf8;
  --warn: #f59e0b;
  --warn-soft: #fef3e2;
  --danger: #e14b4b;
  --danger-soft: #fdecec;
  --ok: #2fa86a;
  --ok-soft: #e8f8ef;
  --text: #1c2536;
  --text-muted: #6b7688;
  --border: #e4e8f0;
  --bg: #f4f6fb;
  --card: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.layout { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--navy-950);
  color: #cdd6e8;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand .logo {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #0aa5ee);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 15px;
}

.sidebar-brand .name {
  font-weight: 600;
  color: #fff;
  font-size: 15px;
  line-height: 1.25;
}

.sidebar-brand .tag {
  font-size: 11.5px;
  color: #7c8aa5;
}

.sidebar-nav { flex: 1; padding: 14px 10px; display: flex; flex-direction: column; gap: 2px; }

.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: #b7c1d6;
  font-size: 14px;
  font-weight: 500;
}

.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.active { background: var(--accent); color: #04241f; }
.sidebar-nav a .ic { width: 18px; text-align: center; opacity: 0.9; }

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 13px;
  color: #8592ab;
}

.sidebar-footer a { color: #cdd6e8; font-weight: 500; }
.sidebar-footer a:hover { color: #fff; }

/* ---------- Main ---------- */
.main { flex: 1; min-width: 0; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex; align-items: center; justify-content: space-between;
}

.topbar h1 { font-size: 19px; margin: 0; font-weight: 650; }
.topbar .subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.content { padding: 24px 28px 60px; max-width: 1180px; }

/* ---------- Flash messages ---------- */
.flashes { padding: 16px 28px 0; max-width: 1180px; }
.flash {
  padding: 11px 16px; border-radius: 9px; margin-bottom: 10px;
  font-size: 14px; font-weight: 500;
}
.flash.success { background: var(--ok-soft); color: #197a4f; }
.flash.error { background: var(--danger-soft); color: #b23434; }

/* ---------- Cards / stat grid ---------- */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 26px;
}

.stat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--shadow);
}

.stat-card .label { font-size: 12.5px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.stat-card .value { font-size: 27px; font-weight: 700; margin-top: 6px; }
.stat-card .value.warn { color: var(--warn); }
.stat-card .value.danger { color: var(--danger); }
.stat-card .value.ok { color: var(--ok); }
.stat-card .value.accent { color: var(--accent-dark); }

.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 22px; overflow: hidden;
}

.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
}

.panel-header h2 { font-size: 15.5px; margin: 0; font-weight: 650; }
.panel-body { padding: 4px 0; }
.panel-body.padded { padding: 18px 20px; }
.panel-empty { padding: 28px 20px; text-align: center; color: var(--text-muted); font-size: 14px; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 20px; font-size: 14px; }
thead th {
  font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em; color: var(--text-muted);
  border-bottom: 1px solid var(--border); font-weight: 650;
}
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #fafbfd; }
td.num, th.num { text-align: right; }
td .muted { color: var(--text-muted); font-size: 12.5px; }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
}
.badge.ok { background: var(--ok-soft); color: #197a4f; }
.badge.warn { background: var(--warn-soft); color: #a3620a; }
.badge.danger { background: var(--danger-soft); color: #b23434; }
.badge.neutral { background: #eef1f6; color: var(--text-muted); }
.badge.accent { background: var(--accent-soft); color: var(--accent-dark); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; font-size: 14px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--navy-900); color: #fff; }
.btn-primary:hover { background: var(--navy-800); }
.btn-accent { background: var(--accent); color: #04241f; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: #c6cedd; background: #f9fafc; }
.btn-danger-outline { background: #fff; color: var(--danger); border-color: #f3c9c9; }
.btn-danger-outline:hover { background: var(--danger-soft); }
.btn-sm { padding: 6px 11px; font-size: 12.5px; border-radius: 7px; }
.btn[disabled] { opacity: .55; cursor: default; }

.actions-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- Forms ---------- */
.form-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px 28px; max-width: 620px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 18px; }
.form-grid.single { grid-template-columns: 1fr; }
.field { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; color: var(--text); }
.field .hint { font-size: 12px; color: var(--text-muted); }
input[type=text], input[type=number], input[type=date], input[type=email],
input[type=password], input[type=tel], select, textarea {
  border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px;
  font-size: 14px; font-family: inherit; color: var(--text); background: #fff;
  width: 100%;
}
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(21,184,166,.15);
}
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }
.form-actions { display: flex; gap: 10px; margin-top: 6px; }

/* ---------- Search ---------- */
.search-box { display: flex; gap: 10px; margin-bottom: 18px; }
.search-box input { max-width: 320px; }

/* ---------- Auth pages ---------- */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at top left, #16233d, var(--navy-950));
  padding: 20px;
}
.auth-card {
  background: #fff; border-radius: 16px; padding: 34px 32px; width: 100%; max-width: 380px;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.auth-card .logo {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #0aa5ee);
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 18px;
  margin-bottom: 16px;
}
.auth-card h1 { font-size: 20px; margin: 0 0 4px; }
.auth-card p.sub { color: var(--text-muted); font-size: 13.5px; margin: 0 0 22px; }

/* ---------- Misc ---------- */
.text-muted { color: var(--text-muted); }
.mt-0 { margin-top: 0; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state .big-ic { font-size: 34px; margin-bottom: 10px; }

@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; flex-direction: row; overflow-x: auto; }
  .sidebar-nav { flex-direction: row; }
  .sidebar-footer { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .content, .topbar, .flashes { padding-left: 16px; padding-right: 16px; }
}