:root,
[data-accent="teal"] {
  --bg-base: #0b0d10;
  --bg-surface: #12151b;
  --bg-elevated: #181c24;
  --bg-hover: #1e232d;
  --border-subtle: #222733;
  --border-strong: #2e3545;
  --text-primary: #eceff4;
  --text-secondary: #9aa3b2;
  --text-muted: #646e82;
  --accent: #2dd4bf;
  --accent-dim: rgba(45, 212, 191, 0.12);
  --accent-border: rgba(45, 212, 191, 0.35);
  --status-up: #10b981;
  --status-up-bg: rgba(16, 185, 129, 0.12);
  --status-sleep: #f59e0b;
  --status-sleep-bg: rgba(245, 158, 11, 0.12);
  --status-down: #f43f5e;
  --status-down-bg: rgba(244, 63, 94, 0.12);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
}

[data-accent="violet"] {
  --accent: #8b5cf6;
  --accent-dim: rgba(139, 92, 246, 0.14);
  --accent-border: rgba(139, 92, 246, 0.4);
}

[data-accent="amber"] {
  --accent: #f59e0b;
  --accent-dim: rgba(245, 158, 11, 0.14);
  --accent-border: rgba(245, 158, 11, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Subtle utilitarian grid backdrop */
body {
  background-image:
    radial-gradient(circle at 50% 0%, var(--accent-dim), transparent 55%),
    linear-gradient(to right, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(11, 13, 16, 0.82);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.06em;
}

.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 2px 7px;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: var(--bg-surface);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  border-color: var(--border-subtle);
}

.clock-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 5px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
}

/* Main Content */
main {
  flex: 1;
  padding: 40px 0 64px;
}

/* Hero / System Banner */
.hero-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  margin-bottom: 28px;
}

.hero-left h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.hero-left p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.overall-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--status-up-bg);
  color: var(--status-up);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.up {
  background: var(--status-up);
  box-shadow: 0 0 8px var(--status-up);
}

.dot.sleep {
  background: var(--status-sleep);
  box-shadow: 0 0 8px var(--status-sleep);
}

.dot.down {
  background: var(--status-down);
  box-shadow: 0 0 8px var(--status-down);
}

/* Section Label */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.section-meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* Status Telemetry Grid */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 36px;
}

.status-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 16px 18px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.status-card:hover {
  border-color: var(--border-strong);
}

.status-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.node-id {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--text-muted);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
}

.status-badge.up {
  background: var(--status-up-bg);
  color: var(--status-up);
}

.status-badge.sleep {
  background: var(--status-sleep-bg);
  color: var(--status-sleep);
}

.status-badge.down {
  background: var(--status-down-bg);
  color: var(--status-down);
}

.node-name {
  font-weight: 600;
  font-size: 0.96rem;
  margin-bottom: 2px;
}

.node-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Primary Modules Two-Column Grid */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}

.module-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  transition: border-color 0.18s ease;
}

.module-card:hover {
  border-color: var(--accent-border);
}

.module-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.module-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.module-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 16px;
}

.spec-list {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  display: grid;
  gap: 8px;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

.spec-label {
  color: var(--text-muted);
}

.spec-val {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* Notes List Preview inside Module */
.notes-preview-list {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.note-preview-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.note-preview-row:hover {
  border-color: var(--accent-border);
  background: var(--bg-hover);
}

.note-preview-title {
  font-size: 0.86rem;
  font-weight: 500;
}

.note-preview-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
}

.btn-primary {
  background: var(--accent);
  color: #071210;
  border-color: var(--accent);
}

.btn-primary:hover {
  filter: brightness(1.1);
  background: var(--accent);
  border-color: var(--accent);
}

/* Modal (Request 12h Access) */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 10, 0.78);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 460px;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 24px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
}

.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.rate-limit-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding: 8px 10px;
  background: var(--bg-base);
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
}

/* Footer + Accent Switcher */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 20px 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.theme-picker {
  display: flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  cursor: pointer;
}

.swatch.teal { background: #2dd4bf; }
.swatch.violet { background: #8b5cf6; }
.swatch.amber { background: #f59e0b; }

@media (max-width: 640px) {
  .clock-pill {
    display: none;
  }
  .modules-grid {
    grid-template-columns: 1fr;
  }
}