:root {
  --navy: #0b1f3a;
  --navy-deep: #071528;
  --navy-soft: #132a4a;
  --accent: #2f6fed;
  --accent-soft: #e8f0ff;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --text: #1a2332;
  --muted: #6b7a90;
  --border: #e2e8f0;
  --paid: #0f9f6e;
  --pending: #d97706;
  --danger: #dc2626;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 31, 58, 0.06);
  --sidebar-w: 260px;
  --font: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body.admin-body {
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, #eef3fa 0%, var(--bg) 40%);
  color: var(--text);
  min-height: 100vh;
}

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

.admin-sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(185deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 1040;
  transition: transform .25s ease;
}

.sidebar-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  object-fit: contain;
  /* background: #fff; */
  flex-shrink: 0;
}
.brand-name { font-weight: 700; font-size: .95rem; }
.brand-sub { font-size: .75rem; opacity: .65; }

.sidebar-nav { padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar-nav a {
  color: rgba(255,255,255,.78);
  text-decoration: none;
  padding: 11px 14px;
  border-radius: 10px;
  display: flex; align-items: center; gap: 10px;
  font-size: .92rem; font-weight: 500;
  transition: background .15s, color .15s;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
  background: rgba(255,255,255,.1);
  color: #fff;
}
.sidebar-nav a.active { background: var(--accent); }

.sidebar-footer {
  padding: 16px 18px 22px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.admin-chip {
  display: flex; align-items: center; gap: 8px;
  font-size: .85rem; margin-bottom: 10px; opacity: .9;
}
.logout-link {
  color: rgba(255,255,255,.7); text-decoration: none; font-size: .85rem;
}
.logout-link:hover { color: #fff; }

.admin-main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 28px;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.page-title { font-size: 1.25rem; font-weight: 700; margin: 0; flex: 1; }
.topbar-meta { color: var(--muted); font-size: .85rem; }
.sidebar-toggle { font-size: 1.4rem; color: var(--navy); text-decoration: none; padding: 0; }

.admin-content { padding: 24px 28px 40px; flex: 1; }
.admin-footer {
  padding: 16px 28px; color: var(--muted); font-size: .8rem;
  border-top: 1px solid var(--border);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  box-shadow: var(--shadow);
}
.stat-card .label { color: var(--muted); font-size: .8rem; font-weight: 500; margin-bottom: 6px; }
.stat-card .value { font-size: 1.45rem; font-weight: 700; color: var(--navy); line-height: 1.2; }
.stat-card .hint { font-size: .75rem; color: var(--muted); margin-top: 6px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.panel-header h2 { margin: 0; font-size: 1rem; font-weight: 650; }
.panel-body { padding: 20px; }

.btn-navy {
  background: var(--navy); border-color: var(--navy); color: #fff;
}
.btn-navy:hover { background: var(--navy-soft); border-color: var(--navy-soft); color: #fff; }
.btn-accent {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.btn-accent:hover { background: #245dd4; border-color: #245dd4; color: #fff; }

.badge-paid { background: #d1fae5; color: #065f46; }
.badge-pending { background: #ffedd5; color: #9a3412; }
.badge-processing { background: var(--accent-soft); color: #1e40af; }
.badge-danger-status { background: #fee2e2; color: #991b1b; }
.badge-draft { background: #e2e8f0; color: #334155; }
.status-badge {
  display: inline-flex; align-items: center;
  padding: .35rem .65rem; border-radius: 999px;
  font-size: .75rem; font-weight: 600;
}

.table > :not(caption) > * > * { padding: .85rem .9rem; vertical-align: middle; }
.table thead th {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .04em;
  color: var(--muted); font-weight: 600; background: #f8fafc;
  border-bottom-color: var(--border);
}

.form-label { font-weight: 550; font-size: .875rem; color: var(--navy); }
.form-control, .form-select {
  border-radius: 10px; border-color: var(--border); padding: .6rem .85rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 .2rem rgba(47, 111, 237, .15);
}
.field-error {
  color: #b91c1c;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  font-size: .8rem;
  font-weight: 550;
  padding: .35rem .65rem;
  margin-bottom: .4rem;
}
.form-control.is-invalid, .form-select.is-invalid {
  border-color: #dc2626;
  background-image: none;
}

.item-row {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  position: relative;
}
.invoice-sidebar-sticky {
  position: sticky;
  top: 90px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  padding-bottom: 4px;
}
.calc-preview {
  background: linear-gradient(160deg, #0b1f3a, #163a6b);
  color: #fff;
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  flex-shrink: 0;
}
.calc-preview h3 { font-size: 1rem; margin-bottom: 16px; }
.calc-line { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: .9rem; opacity: .9; }
.calc-total {
  display: flex; justify-content: space-between;
  margin-top: 14px; padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.2);
  font-size: 1.15rem; font-weight: 700;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 10% 20%, rgba(47,111,237,.18), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(11,31,58,.2), transparent 35%),
    linear-gradient(160deg, #0b1f3a, #163a6b 55%, #1e4d8c);
  padding: 24px;
}
.login-card {
  width: 100%; max-width: 420px;
  background: #fff; border-radius: 18px;
  padding: 36px 32px;
  box-shadow: 0 25px 60px rgba(0,0,0,.25);
}
.login-brand { text-align: center; margin-bottom: 28px; }
.login-brand .mark {
  width: 72px; height: 72px; margin: 0 auto 12px;
  border-radius: 16px;
  object-fit: contain;
  display: block;
  background: #fff;
  box-shadow: 0 8px 24px rgba(11, 31, 58, .12);
}

@media (max-width: 991.98px) {
  .admin-sidebar { transform: translateX(-100%); }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-main { margin-left: 0; }
  .admin-content { padding: 18px 16px 32px; }
  .admin-topbar { padding: 14px 16px; }
}