:root {
  --bg: #050509;
  --bg-card: #101018;
  --bg-card-alt: #181824;
  --accent: #f0b90b;
  --accent-soft: rgba(240,185,11,0.15);
  --text: #f5f5f7;
  --text-muted: #9a9ab0;
  --border: #272738;
  --danger: #ff4d4f;
  --danger-soft: rgba(255,77,79,0.1);
  --pos: #16c784;
  --neg: #ff4d4f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #171721 0, #050509 45%);
  color: var(--text);
}

.app-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: #050509;
  border-right: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.15em;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 2rem;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-item {
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.55rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  display: block;
}

.nav-item.active,
.nav-item:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.footer-note {
  margin-top: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.7;
}

.main {
  flex: 1;
  padding: 1.5rem 2rem;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  margin: 0 0 0.3rem;
  font-size: 1.4rem;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  font-size: 0.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.2fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 1.25rem 1.3rem;
  border: 1px solid #1f1f2a;
  box-shadow: 0 18px 45px rgba(0,0,0,0.55);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.tv-container {
  margin-top: 0.75rem;
  height: 420px;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid #222233;
}

#tv_chart {
  width: 100%;
  height: 100%;
}

.status-grid {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 0.75rem;
  font-size: 0.85rem;
}

.label {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.value {
  margin-top: 0.15rem;
  font-size: 0.95rem;
}

.value.ok {
  color: var(--pos);
}

.value.warn {
  color: var(--danger);
}

.value.pos {
  color: var(--pos);
}

.value.neg {
  color: var(--neg);
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  font-size: 0.85rem;
  cursor: pointer;
  font-weight: 500;
}

.btn.primary {
  background: linear-gradient(135deg, #f5c84c, #f0b90b);
  color: #1a1a1f;
}

.btn.danger {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.btn.test {
  background: var(--bg-card-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.test:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.6rem;
  font-size: 0.8rem;
}

.table th,
.table td {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid #222234;
}

.table th {
  text-align: left;
  color: var(--text-muted);
  font-weight: 500;
}

.table tr:last-child td {
  border-bottom: none;
}

.table tr:hover td {
  background: #141422;
}

.muted {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.settings-form .form-grid {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 0.75rem 1.25rem;
}

.settings-form label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.settings-form input,
.settings-form select {
  width: 100%;
  padding: 0.4rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg-card-alt);
  color: var(--text);
  font-size: 0.86rem;
}

.settings-form input:focus,
.settings-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(240,185,11,0.3);
}

.form-actions {
  margin-top: 1.25rem;
  text-align: right;
}

small.muted {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.7rem;
}

@media (max-width: 960px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }
  .nav {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .main {
    padding: 1rem;
  }
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }
  .status-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .settings-form .form-grid {
    grid-template-columns: minmax(0,1fr);
  }
}