:root {
  --bg: #0f1419;
  --bg-elevated: #171e26;
  --bg-soft: #1d2630;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eef4;
  --muted: #93a1b0;
  --accent: #2dd4a8;
  --accent-2: #3b82f6;
  --danger: #f07178;
  --warn: #e6b450;
  --ok: #2dd4a8;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --font-display: "Outfit", sans-serif;
  --font-body: "Source Sans 3", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(45, 212, 168, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(59, 130, 246, 0.10), transparent 50%),
    linear-gradient(180deg, #0c1116 0%, #121820 100%);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); margin: 0 0 0.35rem; letter-spacing: -0.02em; }
p { margin: 0; }
.muted { color: var(--muted); }

.app-shell { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar {
  border-right: 1px solid var(--border);
  background: rgba(15, 20, 25, 0.85);
  backdrop-filter: blur(12px);
  padding: 1.25rem 1rem 2rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.brand { display: flex; gap: 0.85rem; align-items: center; padding: 0.35rem 0.5rem 1.25rem; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041016; font-family: var(--font-display); font-weight: 700;
}
.brand-name { font-family: var(--font-display); font-weight: 650; }
.brand-sub { color: var(--muted); font-size: 0.8rem; }

.nav { display: flex; flex-direction: column; gap: 0.35rem; }
.nav-link, .nav-group-title {
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  width: 100%; border: 0; background: transparent; color: var(--text);
  padding: 0.65rem 0.8rem; border-radius: 10px; cursor: pointer;
  font: inherit; text-align: left;
}
.nav-link:hover, .nav-group-title:hover { background: rgba(255,255,255,0.04); }
.nav-link.is-active { background: rgba(45, 212, 168, 0.12); color: var(--accent); }
.nav-group-title { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.nav-children { display: none; padding-left: 0.4rem; }
.nav-group.is-open .nav-children { display: grid; gap: 0.15rem; }
.badge-phase {
  font-size: 0.68rem; color: var(--muted); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.1rem 0.4rem;
}

.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  padding: 1.25rem 1.75rem 0.5rem; border-bottom: 1px solid transparent;
}
.topbar-actions { display: flex; gap: 0.75rem; align-items: center; }
.user-chip {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.45rem 0.85rem; display: grid;
}
.user-chip span { color: var(--muted); font-size: 0.8rem; }

.content { padding: 1rem 1.75rem 2rem; }
.footer {
  margin-top: auto; padding: 1rem 1.75rem 1.5rem; color: var(--muted);
  display: flex; justify-content: space-between; gap: 1rem; font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.grid { display: grid; gap: 1rem; }
.grid-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  background: linear-gradient(180deg, rgba(29,38,48,0.95), rgba(23,30,38,0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 1rem; }
.stat-value { font-family: var(--font-display); font-size: 2rem; font-weight: 700; margin-top: 0.55rem; }
.stat-label { color: var(--muted); font-size: 0.9rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  border-radius: 10px; border: 1px solid transparent; padding: 0.65rem 1rem;
  font: inherit; cursor: pointer; background: var(--accent); color: #041016; font-weight: 600;
}
.btn:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-danger { background: rgba(240,113,120,0.15); color: var(--danger); border-color: rgba(240,113,120,0.35); }
.btn-secondary { background: rgba(59,130,246,0.15); color: #93c5fd; border-color: rgba(59,130,246,0.3); }

.form { display: grid; gap: 0.9rem; }
.form-row { display: grid; gap: 0.35rem; }
label { color: var(--muted); font-size: 0.9rem; }
input, select, textarea {
  width: 100%; border-radius: 10px; border: 1px solid var(--border);
  background: #0d1217; color: var(--text); padding: 0.7rem 0.8rem; font: inherit;
}
textarea { min-height: 110px; resize: vertical; }

.table-wrap { overflow: auto; border-radius: 12px; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.75rem 0.85rem; border-bottom: 1px solid var(--border); text-align: left; }
th { color: var(--muted); font-weight: 600; background: rgba(255,255,255,0.02); }
tr:last-child td { border-bottom: 0; }

.alert {
  border-radius: 12px; padding: 0.85rem 1rem; border: 1px solid var(--border); margin-bottom: 1rem;
}
.alert-ok { background: rgba(45,212,168,0.1); border-color: rgba(45,212,168,0.3); }
.alert-warn { background: rgba(230,180,80,0.1); border-color: rgba(230,180,80,0.35); color: #f0d48a; }
.alert-error { background: rgba(240,113,120,0.1); border-color: rgba(240,113,120,0.35); color: #ffb4b8; }

.pill {
  display: inline-flex; align-items: center; gap: 0.35rem;
  border-radius: 999px; padding: 0.2rem 0.6rem; font-size: 0.8rem;
  border: 1px solid var(--border); color: var(--muted);
}
.pill-ok { color: var(--ok); border-color: rgba(45,212,168,0.35); }
.pill-warn { color: var(--warn); border-color: rgba(230,180,80,0.35); }
.pill-danger { color: #ffb4b8; border-color: rgba(240,113,120,0.45); }

.admin-tabs { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-top: 1rem; border-top: 1px solid var(--border); padding-top: 0.75rem; }
.admin-tab {
  padding: 0.45rem 0.85rem; border-radius: 8px; font-size: 0.88rem;
  color: var(--muted); border: 1px solid transparent;
}
.admin-tab:hover { color: var(--text); background: var(--bg-soft); }
.admin-tab.is-active { color: var(--text); border-color: var(--border); background: var(--bg-soft); }

.health-gauge {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; font-weight: 600; min-width: 2.2rem;
  border: 1px solid var(--border);
}
.health-gauge--sm { font-size: 0.78rem; padding: 0.15rem 0.4rem; }
.health-gauge--md { font-size: 0.95rem; padding: 0.25rem 0.55rem; }
.health-ok { color: var(--ok); border-color: rgba(45,212,168,0.35); }
.health-warn { color: var(--warn); border-color: rgba(230,180,80,0.35); }
.health-crit { color: #ffb4b8; border-color: rgba(240,113,120,0.45); }

.health-bar { height: 6px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; margin-top: 0.5rem; }
.health-bar span { display: block; height: 100%; border-radius: 999px; background: var(--ok); }
.health-bar.health-warn span { background: var(--warn); }
.health-bar.health-crit span { background: #f07178; }

.table-dense td, .table-dense th { padding: 0.45rem 0.55rem; font-size: 0.88rem; }
.chart-card canvas { max-height: 260px; }

.login-page {
  min-height: 100vh; display: grid; place-items: center; padding: 1.5rem;
  background:
    radial-gradient(800px 400px at 20% 10%, rgba(45,212,168,0.16), transparent 60%),
    radial-gradient(700px 400px at 90% 80%, rgba(59,130,246,0.14), transparent 55%),
    #0c1116;
}
.login-card {
  width: min(420px, 100%);
  background: rgba(23,30,38,0.92);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.login-card .brand { padding: 0 0 1rem; }

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .grid-stats, .grid-2 { grid-template-columns: 1fr; }
  .footer { flex-direction: column; }
}