:root {
  --bg: #0b1220;
  --bg-elevated: #121a2b;
  --bg-soft: #182338;
  --border: rgba(148, 163, 184, 0.16);
  --text: #e8eef8;
  --muted: #93a4bd;
  --accent: #2dd4bf;
  --accent-dim: rgba(45, 212, 191, 0.14);
  --danger: #fb7185;
  --warn: #fbbf24;
  --ok: #34d399;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --font: "Segoe UI", "Avenir Next", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(45, 212, 191, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(56, 189, 248, 0.12), transparent 50%),
    linear-gradient(180deg, #071018 0%, var(--bg) 40%, #0a1322 100%);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: rgba(10, 16, 28, 0.85);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(12px);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0 0.6rem;
}
.brand strong {
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}
.brand span {
  color: var(--muted);
  font-size: 0.8rem;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.nav a {
  color: var(--muted);
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.nav a:hover, .nav a.active {
  background: var(--accent-dim);
  color: var(--text);
  text-decoration: none;
}

.sidebar-foot {
  margin-top: auto;
  padding: 0.6rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.main {
  padding: 1.75rem 2rem 3rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.topbar h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 650;
}
.topbar p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1rem;
}
.grid.stats {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin-bottom: 1.25rem;
}

.card {
  background: rgba(18, 26, 43, 0.88);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.25rem;
}
.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}
.stat-value {
  margin-top: 0.35rem;
  font-size: 1.8rem;
  font-weight: 700;
}

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  text-align: left;
  padding: 0.75rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: 0.92rem;
}
th { color: var(--muted); font-weight: 600; }
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--accent-dim);
  color: var(--accent);
}
.badge.off { background: rgba(251, 113, 133, 0.14); color: var(--danger); }
.badge.type { background: rgba(56, 189, 248, 0.14); color: #7dd3fc; }

.actions { display: flex; gap: 0.45rem; flex-wrap: wrap; }

.btn, button, input[type="submit"] {
  appearance: none;
  border: 1px solid transparent;
  background: var(--accent);
  color: #042f2e;
  font-weight: 650;
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  font: inherit;
}
.btn.secondary, button.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn.danger, button.danger {
  background: rgba(251, 113, 133, 0.16);
  color: var(--danger);
  border-color: rgba(251, 113, 133, 0.35);
}
.btn:hover, button:hover, input[type="submit"]:hover { filter: brightness(1.05); }

.form-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.form-grid .full { grid-column: 1 / -1; }
label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
}
input, select, textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}
textarea { min-height: 110px; resize: vertical; }
.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.55rem;
}
.checkbox input { width: auto; }

.flash {
  margin-bottom: 1rem;
  padding: 0.8rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.flash.ok { background: rgba(52, 211, 153, 0.12); color: var(--ok); }
.flash.err { background: rgba(251, 113, 133, 0.12); color: var(--danger); }

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.login-card {
  width: min(420px, 100%);
  background: rgba(18, 26, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 2rem;
}
.login-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.8rem;
}
.login-card .sub {
  color: var(--muted);
  margin-bottom: 1.4rem;
}
.login-card form {
  display: grid;
  gap: 0.9rem;
}
.mono { font-family: var(--mono); font-size: 0.85rem; }
.muted { color: var(--muted); }
.stack { display: grid; gap: 1rem; }

.menu-toggle { display: none; margin-bottom: 1rem; }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    display: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .sidebar.open { display: flex; }
  .menu-toggle { display: inline-flex; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .grid.stats { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .main { padding: 1.25rem; }
}