/* ==========================================================
   Teleport Billing System
   Mengikuti identitas visual fiberteleport.net:
   - Warna utama: biru (#0d6efd), hijau (#198754), biru tua (#084298)
   - Font: Poppins (judul/heading), Nunito (teks umum)
   ========================================================== */

:root {
  --tb-primary: #0d6efd;
  --tb-secondary: #198754;
  --tb-dark: #084298;
  --tb-light-bg: #f4f7fc;
  --tb-border: #e3e8f0;
  --tb-text: #1f2937;
  --tb-muted: #6b7280;
  --tb-radius: 12px;
  --tb-shadow: 0 4px 18px rgba(13, 110, 253, 0.08);
}

* { box-sizing: border-box; }

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--tb-light-bg);
  color: var(--tb-text);
  margin: 0;
}

h1, h2, h3, h4, h5, h6, .brand-font {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
}

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

/* ---------- Layout Topbar ---------- */
.tb-topbar {
  background: linear-gradient(135deg, var(--tb-dark) 0%, var(--tb-primary) 100%);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}
.tb-topbar .tb-brand { display: flex; align-items: center; gap: 12px; }
.tb-topbar .tb-brand img { height: 38px; border-radius: 6px; background: #fff; padding: 2px; }
.tb-topbar .tb-brand span { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 1.1rem; }
.tb-topbar .tb-user { font-size: 0.9rem; display: flex; align-items: center; gap: 14px; }
.tb-topbar a.tb-logout { color: #fff; opacity: 0.85; border: 1px solid rgba(255,255,255,0.4); padding: 6px 14px; border-radius: 20px; font-size: 0.85rem; }
.tb-topbar a.tb-logout:hover { background: rgba(255,255,255,0.15); opacity: 1; }

/* ---------- Sidebar ---------- */
.tb-layout { display: flex; min-height: calc(100vh - 64px); }
.tb-sidebar {
  width: 230px;
  background: #fff;
  border-right: 1px solid var(--tb-border);
  padding: 18px 0;
  flex-shrink: 0;
}
.tb-sidebar a {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 22px; color: var(--tb-muted); font-weight: 600; font-size: 0.92rem;
  border-left: 3px solid transparent;
}
.tb-sidebar a:hover { background: #f0f5ff; color: var(--tb-primary); }
.tb-sidebar a.active { background: #eaf2ff; color: var(--tb-primary); border-left-color: var(--tb-primary); }
.tb-main { flex: 1; padding: 26px 30px; }

/* ---------- Card ---------- */
.tb-card {
  background: #fff;
  border-radius: var(--tb-radius);
  box-shadow: var(--tb-shadow);
  border: 1px solid var(--tb-border);
  padding: 22px;
  margin-bottom: 22px;
}
.tb-card-title { font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 1.05rem; margin-bottom: 16px; color: var(--tb-dark); }

/* ---------- Stat boxes (dashboard) ---------- */
.tb-stat-row { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 22px; }
.tb-stat {
  flex: 1; min-width: 200px;
  background: #fff; border-radius: var(--tb-radius); padding: 20px;
  box-shadow: var(--tb-shadow); border: 1px solid var(--tb-border);
}
.tb-stat .label { color: var(--tb-muted); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.tb-stat .value { font-family: 'Poppins', sans-serif; font-size: 1.7rem; font-weight: 700; margin-top: 6px; color: var(--tb-dark); }
.tb-stat.green .value { color: var(--tb-secondary); }
.tb-stat.red .value { color: #dc3545; }

/* ---------- Buttons ---------- */
.btn-tb-primary { background: var(--tb-primary); border-color: var(--tb-primary); color: #fff; }
.btn-tb-primary:hover { background: var(--tb-dark); border-color: var(--tb-dark); color: #fff; }
.btn-tb-success { background: var(--tb-secondary); border-color: var(--tb-secondary); color: #fff; }
.btn-tb-success:hover { background: #146c43; border-color: #146c43; color: #fff; }

/* ---------- Tables ---------- */
.table-tb thead th { background: #f0f5ff; color: var(--tb-dark); font-size: 0.85rem; text-transform: uppercase; letter-spacing: .03em; border-bottom: none; }
.table-tb td, .table-tb th { vertical-align: middle; padding: 12px 14px; }
.table-tb tbody tr:hover { background: #fafcff; }

/* ---------- Auth pages (login) ---------- */
.tb-auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--tb-dark) 0%, var(--tb-primary) 60%, var(--tb-secondary) 130%);
  padding: 20px;
}
.tb-auth-card {
  background: #fff; width: 100%; max-width: 420px; border-radius: 16px;
  padding: 38px 34px; box-shadow: 0 20px 50px rgba(0,0,0,0.25); text-align: center;
}
.tb-auth-card img.logo { height: 56px; margin-bottom: 14px; }
.tb-auth-card h1 { font-size: 1.25rem; margin: 0 0 4px; }
.tb-auth-card p.subtitle { color: var(--tb-muted); font-size: 0.88rem; margin-bottom: 24px; }

/* ---------- Footer ---------- */
.tb-footer {
  text-align: center; padding: 18px; color: var(--tb-muted); font-size: 0.82rem;
  border-top: 1px solid var(--tb-border); background: #fff;
}
.tb-footer a { color: var(--tb-primary); }

@media (max-width: 768px) {
  .tb-layout { flex-direction: column; }
  .tb-sidebar { width: 100%; display: flex; overflow-x: auto; padding: 8px 0; }
  .tb-sidebar a { padding: 10px 14px; border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
  .tb-sidebar a.active { border-left: none; border-bottom-color: var(--tb-primary); }
  .tb-main { padding: 18px; }
}