/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f1117; --bg2: #1a1d27; --bg3: #242836;
  --fg: #e4e4e7; --fg2: #a1a1aa; --fg3: #71717a;
  --accent: #3b82f6; --accent2: #2563eb;
  --green: #22c55e; --red: #ef4444; --yellow: #eab308; --cyan: #06b6d4;
  --border: #2e3348; --radius: 8px;
  --sidebar-w: 220px;
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace; background: var(--bg); color: var(--fg); min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Layout --- */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w); background: var(--bg2); border-right: 1px solid var(--border);
  padding: 20px 0; flex-shrink: 0; display: flex; flex-direction: column;
  transition: transform .3s ease;
  z-index: 50;
}
.sidebar .logo { padding: 0 20px 20px; font-size: 14px; font-weight: 700; color: var(--accent); letter-spacing: 1px; border-bottom: 1px solid var(--border); }
.sidebar nav { flex: 1; padding: 10px 0; }
.sidebar nav button {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 20px;
  background: none; border: none; color: var(--fg2); cursor: pointer; font-size: 13px; text-align: left;
  transition: background .15s, color .15s;
}
.sidebar nav button:hover { background: var(--bg3); color: var(--fg); }
.sidebar nav button.active { background: var(--bg3); color: var(--accent); border-left: 3px solid var(--accent); }
.main { flex: 1; padding: 24px; overflow-y: auto; min-width: 0; }
.main h1 { font-size: 20px; margin-bottom: 20px; }

/* --- Mobile menu toggle --- */
.menu-toggle {
  display: none;
  position: fixed; top: 12px; left: 12px; z-index: 60;
  width: 40px; height: 40px; border-radius: 8px;
  background: var(--bg2); border: 1px solid var(--border);
  color: var(--fg); font-size: 20px; cursor: pointer;
  align-items: center; justify-content: center;
}
.mobile-overlay {
  display: none;
  position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 40;
}

/* --- Cards --- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; display: flex; flex-direction: column; gap: 6px;
}
.card .label { font-size: 12px; color: var(--fg3); text-transform: uppercase; letter-spacing: .5px; }
.card .value { font-size: 28px; font-weight: 700; }
.card .value.green { color: var(--green); }
.card .value.cyan { color: var(--cyan); }
.card .value.yellow { color: var(--yellow); }

/* --- Table --- */
.table-wrap { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 24px; }
.table-wrap .header { padding: 12px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.table-wrap .header h2 { font-size: 14px; font-weight: 600; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th { text-align: left; padding: 10px 16px; color: var(--fg3); font-weight: 500; border-bottom: 1px solid var(--border); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; white-space: nowrap; }
tbody td { padding: 10px 16px; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg3); }

/* --- Badge --- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; white-space: nowrap; }
.badge.online { background: rgba(34,197,94,.15); color: var(--green); }
.badge.offline { background: rgba(239,68,68,.15); color: var(--red); }
.badge.active { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.internal { background: rgba(234,179,8,.15); color: var(--yellow); }
.badge.external { background: rgba(6,182,212,.15); color: var(--cyan); }
.badge.loopback { background: rgba(161,161,170,.15); color: var(--fg3); }
.badge.reserved-idle { background: rgba(161,161,170,.15); color: var(--fg3); }
.badge.pending { background: rgba(234,179,8,.15); color: var(--yellow); }
.badge.approved { background: rgba(34,197,94,.15); color: var(--green); }
.badge.rejected { background: rgba(239,68,68,.15); color: var(--red); }

/* --- Buttons --- */
.btn { padding: 6px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg3); color: var(--fg); font-size: 12px; cursor: pointer; transition: background .15s; white-space: nowrap; }
.btn:hover { background: var(--accent2); border-color: var(--accent); }
.btn-sm { padding: 4px 10px; font-size: 11px; }

/* --- Filter tabs --- */
.filters { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.filters button { padding: 4px 12px; border-radius: 14px; border: 1px solid var(--border); background: var(--bg2); color: var(--fg2); font-size: 12px; cursor: pointer; }
.filters button.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* --- Audit log --- */
.audit-list { max-height: 400px; overflow-y: auto; }
.audit-item { padding: 8px 16px; border-bottom: 1px solid var(--border); font-size: 12px; display: flex; gap: 12px; flex-wrap: wrap; }
.audit-item .ts { color: var(--fg3); white-space: nowrap; min-width: 160px; }
.audit-item .ev { font-weight: 600; min-width: 120px; }

/* --- Login --- */
.login-overlay {
  position: fixed; inset: 0; background: var(--bg); display: flex; align-items: center; justify-content: center; z-index: 100;
}
.login-box {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; width: 360px; max-width: 90vw;
}
.login-box h2 { font-size: 18px; margin-bottom: 4px; }
.login-box .subtitle { font-size: 12px; color: var(--fg3); margin-bottom: 24px; }
.login-box label { font-size: 12px; color: var(--fg2); display: block; margin-bottom: 4px; }
.login-box input[type="text"],
.login-box input[type="password"] {
  width: 100%; padding: 8px 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; color: var(--fg); font-size: 13px; margin-bottom: 16px; outline: none;
}
.login-box input:focus { border-color: var(--accent); }
.login-box .login-btn {
  width: 100%; padding: 10px; border: none; border-radius: 6px;
  background: var(--accent); color: #fff; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: background .15s;
}
.login-box .login-btn:hover { background: var(--accent2); }
.login-box .login-btn:disabled { opacity: .5; cursor: not-allowed; }
.login-box .error-msg { color: var(--red); font-size: 12px; margin-bottom: 12px; }
.logout-btn {
  padding: 8px 20px; background: none; border: 1px solid var(--border);
  border-radius: 6px; color: var(--fg2); font-size: 12px; cursor: pointer;
}
.logout-btn:hover { background: var(--bg3); color: var(--red); border-color: var(--red); }

/* --- Form inputs (inline style overrides) --- */
.form-row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.form-field label { font-size: 11px; color: var(--fg3); display: block; margin-bottom: 4px; }
.form-field input, .form-field select {
  background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
  padding: 6px 10px; color: var(--fg); font-size: 12px; max-width: 100%;
}

/* --- Section header --- */
.section-header {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
.section-header h2 { font-size: 16px; font-weight: 700; color: var(--fg); }
.section-header .section-desc { font-size: 12px; color: var(--fg3); font-family: monospace; }

/* --- Download cards --- */
.dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-bottom: 24px; }
.dl-card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 12px;
}
.dl-card .dl-icon { font-size: 36px; }
.dl-card .dl-title { font-size: 16px; font-weight: 700; }
.dl-card .dl-meta { font-size: 12px; color: var(--fg3); }
.dl-card .dl-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; background: var(--accent); border: none; border-radius: 6px;
  color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; transition: background .15s;
  text-decoration: none;
}
.dl-card .dl-btn:hover { background: var(--accent2); text-decoration: none; }
.dl-card .dl-btn:disabled, .dl-card .dl-btn.disabled { opacity: .4; cursor: not-allowed; }
.dl-empty { text-align: center; color: var(--fg3); padding: 40px 20px; }

/* --- Responsive: Tablet (≤1024px) --- */
@media (max-width: 1024px) {
  .sidebar { width: 180px; }
  .main { padding: 20px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
}

/* --- Responsive: Mobile (≤768px) --- */
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .mobile-overlay.open { display: block; }

  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w); height: 100vh;
    transform: translateX(-100%);
  }
  .sidebar.open { transform: translateX(0); }

  .main { padding: 16px; padding-top: 60px; }
  .main h1 { font-size: 18px; }

  .cards { grid-template-columns: repeat(2, 1fr); }
  .card .value { font-size: 22px; }

  /* Tables scroll horizontally */
  table { min-width: 600px; }

  .audit-item .ts { min-width: auto; }
  .audit-item .ev { min-width: auto; }

  .dl-grid { grid-template-columns: 1fr; }
}

/* --- Responsive: Small phone (≤480px) --- */
@media (max-width: 480px) {
  .main { padding: 12px; padding-top: 56px; }
  .main h1 { font-size: 16px; margin-bottom: 14px; }

  .cards { grid-template-columns: 1fr; gap: 10px; }
  .card { padding: 12px; }
  .card .value { font-size: 20px; }

  .table-wrap .header { padding: 10px 12px; }
  thead th, tbody td { padding: 8px 10px; font-size: 12px; }

  .filters { gap: 4px; }
  .filters button { padding: 3px 8px; font-size: 11px; }

  .audit-item { padding: 6px 12px; font-size: 11px; gap: 8px; }
}