:root {
  --navy: #1e3a5f;
  --navy-light: #2d5a8e;
  --navy-dark: #152c4a;
  --white: #ffffff;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e3a5f;
  --muted: #7a8fa0;
  --dim: #c5d1dc;
  --green: #2d7a4f;
  --red: #9b2c2c;
  --amber: #b45309;
  --blue: #2563eb;
  --purple: #6b21a8;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, 'Segoe UI', sans-serif; min-height: 100vh; -webkit-font-smoothing: antialiased; }
a { color: var(--navy); text-decoration: none; }

/* TOP NAV */
.topnav {
  position: sticky; top: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px; padding: 0 20px;
  background: var(--navy); color: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}
.topnav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 15px; letter-spacing: 0.5px; white-space: nowrap;
}
.topnav-logo .logo-mark {
  width: 32px; height: 32px; border-radius: 6px;
  background: #fff; color: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; letter-spacing: 1px; flex-shrink: 0;
}
.topnav-title {
  position: absolute; left: 50%; transform: translateX(-50%);
  font-size: 14px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  color: rgba(255,255,255,0.85);
}
.topnav-hamburger {
  width: 36px; height: 36px; border-radius: 6px; border: none; background: transparent;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  cursor: pointer; padding: 0;
}
.topnav-hamburger span {
  display: block; width: 20px; height: 2px; background: #fff; border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.topnav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.topnav-hamburger.open span:nth-child(2) { opacity: 0; }
.topnav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* SIDEBAR */
.sidebar-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.35);
  z-index: 300; opacity: 0; pointer-events: none; transition: opacity 0.25s;
}
.sidebar-overlay.open { opacity: 1; pointer-events: auto; }
.sidebar-drawer {
  position: fixed; top: 0; right: -300px; bottom: 0; width: 280px;
  background: var(--navy-dark); z-index: 301;
  transition: right 0.25s ease; display: flex; flex-direction: column;
  box-shadow: -4px 0 20px rgba(0,0,0,0.2);
}
.sidebar-drawer.open { right: 0; }
.sidebar-header {
  padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: space-between;
}
.sidebar-header-title {
  font-size: 13px; font-weight: 600; letter-spacing: 1px; color: rgba(255,255,255,0.6); text-transform: uppercase;
}
.sidebar-close {
  width: 28px; height: 28px; border: none; background: rgba(255,255,255,0.1);
  color: #fff; border-radius: 6px; cursor: pointer; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
}
.sidebar-close:hover { background: rgba(255,255,255,0.2); }
.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 20px; color: rgba(255,255,255,0.7);
  font-size: 14px; font-weight: 500; transition: all 0.15s;
  border-left: 3px solid transparent;
}
.sidebar-link:hover { color: #fff; background: rgba(255,255,255,0.06); }
.sidebar-link.active { color: #fff; background: rgba(255,255,255,0.1); border-left-color: #fff; }
.sidebar-link svg { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }
.sidebar-sep { height: 1px; background: rgba(255,255,255,0.08); margin: 8px 20px; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.1); }
.sidebar-logout {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 10px 16px; border: 1px solid rgba(255,255,255,0.15);
  background: transparent; color: rgba(255,255,255,0.7); border-radius: 6px;
  font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.15s;
}
.sidebar-logout:hover { color: #fff; border-color: rgba(255,255,255,0.3); background: rgba(255,255,255,0.06); }

/* PAGE LAYOUT */
.page { max-width: 1200px; margin: 0 auto; padding: 24px 20px; }
.page-header-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px; flex-wrap: wrap; gap: 12px;
}
.page-heading { font-size: 22px; font-weight: 700; color: var(--navy); letter-spacing: -0.3px; }
.page-sub { font-size: 13px; color: var(--muted); margin-top: 2px; }
.datetime-bar {
  font-size: 12px; color: var(--muted); font-weight: 500;
  padding: 3px 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface);
}

/* CARDS */
.cards-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-bottom: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 18px 20px; position: relative; overflow: hidden;
  transition: box-shadow 0.15s;
}
.card:hover { box-shadow: 0 2px 10px rgba(30,58,95,0.06); }
.card-bar { position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: 8px 8px 0 0; }
.card-bar.green { background: var(--green); }
.card-bar.red { background: var(--red); }
.card-bar.amber { background: var(--amber); }
.card-bar.blue { background: var(--blue); }
.card-bar.navy { background: var(--navy); }
.card-bar.purple { background: var(--purple); }
.card-label { font-size: 10px; font-weight: 600; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; margin-bottom: 8px; }
.card-value { font-size: 32px; font-weight: 700; line-height: 1.1; color: var(--text); margin-bottom: 4px; }
.card-value.green { color: var(--green); }
.card-value.red { color: var(--red); }
.card-value.amber { color: var(--amber); }
.card-value.blue { color: var(--blue); }
.card-sub { font-size: 11px; color: var(--muted); }

/* PANELS */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 20px; margin-bottom: 20px;
}
.panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 8px; }
.panel-title { font-size: 16px; font-weight: 700; color: var(--navy); letter-spacing: 0.3px; }
.section-label {
  font-size: 10px; font-weight: 600; letter-spacing: 2px; color: var(--muted);
  text-transform: uppercase; margin-bottom: 12px;
  display: flex; align-items: center; gap: 12px;
}
.section-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }

/* BADGES */
.badge { font-size: 10px; font-weight: 600; padding: 3px 10px; border-radius: 20px; letter-spacing: 0.5px; display: inline-block; }
.badge-green { background: rgba(45,122,79,0.12); color: var(--green); }
.badge-red { background: rgba(155,44,44,0.12); color: var(--red); }
.badge-amber { background: rgba(180,83,9,0.12); color: var(--amber); }
.badge-blue { background: rgba(37,99,235,0.12); color: var(--blue); }
.badge-navy { background: rgba(30,58,95,0.12); color: var(--navy); }

/* DATA TABLE */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table thead th {
  padding: 10px 14px; text-align: left;
  font-size: 10px; font-weight: 600; letter-spacing: 1px; color: var(--muted);
  text-transform: uppercase; border-bottom: 2px solid var(--border); background: var(--bg);
}
.data-table tbody tr { border-bottom: 1px solid var(--border); transition: background 0.1s; }
.data-table tbody tr:hover { background: #f8fafc; }
.data-table td { padding: 10px 14px; vertical-align: middle; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 6px; font-size: 13px; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface); color: var(--navy);
  cursor: pointer; transition: all 0.15s;
}
.btn:hover { border-color: var(--navy); box-shadow: 0 1px 4px rgba(30,58,95,0.08); }
.btn-navy { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-navy:hover { background: var(--navy-light); }
.btn-sm { padding: 5px 12px; font-size: 11px; }

/* STATUS */
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.status-dot.online { background: var(--green); }
.status-dot.offline { background: var(--red); }
.status-dot.warning { background: var(--amber); }

/* LOADING */
.loading { text-align: center; padding: 32px; color: var(--muted); font-size: 13px; }

/* UTILS */
.mono { font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace; }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-amber { color: var(--amber); }
.text-muted { color: var(--muted); }
.fw-600 { font-weight: 600; }
.mt-20 { margin-top: 20px; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .topnav-title { font-size: 12px; }
  .cards-row { grid-template-columns: 1fr 1fr; }
  .page { padding: 16px 14px; }
  .panel { padding: 16px; }
}
@media (max-width: 480px) {
  .cards-row { grid-template-columns: 1fr; }
  .topnav-title { display: none; }
}