:root {
  /* Ground */
  --bg-void: #0a0c10;
  --bg-panel: #12151b;
  --bg-panel-raised: #181c24;
  --bg-inset: #06070a;
  --border: #232830;
  --border-strong: #333b47;

  /* Text */
  --text-primary: #e7ebf1;
  --text-secondary: #98a2b3;
  --text-tertiary: #5b6472;

  /* Amber Lamp Accent */
  --accent: #f5a623;
  --accent-dim: rgba(245, 166, 35, 0.14);
  --accent-strong: #ffbb47;

  /* Status Lamps */
  --status-running: #f5a623;
  --status-success: #34d399;
  --status-danger: #fb5a5a;
  --status-idle: #5b6472;

  --radius-sm: 3px;
  --radius-md: 5px;

  --font-ui: 'Archivo', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

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

body {
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-ui);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  font-feature-settings: "tnum" 1;
}

::selection {
  background: var(--accent);
  color: var(--bg-void);
}

/* SVG Line Icons */
.icon {
  width: 1em;
  height: 1em;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.15em;
  flex-shrink: 0;
}

/* Header */
.app-header {
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-mark {
  width: 26px;
  height: 26px;
  color: var(--accent);
}

.version-badge {
  font-size: 0.7rem;
  background: var(--bg-inset);
  color: var(--text-tertiary);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
}

.nav-tabs {
  display: flex;
  gap: 0.15rem;
  margin-left: 0.5rem;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-tertiary);
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-ui);
  letter-spacing: 0.02em;
  cursor: pointer;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.12s ease;
}

.nav-tab:hover {
  color: var(--text-primary);
  background-color: var(--bg-panel-raised);
}

.nav-tab.active {
  color: var(--accent);
  background-color: var(--accent-dim);
  border-color: rgba(245, 166, 35, 0.3);
}

.header-status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--status-success);
  box-shadow: 0 0 6px var(--status-success);
}

/* Telemetry Pinned Strip */
.telemetry-strip {
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.telemetry-block {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.telemetry-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.telemetry-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border);
}

/* Hero Section */
.hero-container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 2.5rem;
  text-align: center;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--accent-dim);
  color: var(--accent-strong);
  border: 1px solid rgba(245, 166, 35, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-mono);
  margin-bottom: 1.25rem;
}

.hero-heading {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-heading span {
  color: var(--accent);
}

.hero-subtext {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-ui);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.12s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent);
  color: #14110a;
  border-color: var(--accent);
}

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

.btn-secondary {
  background-color: var(--bg-panel);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background-color: var(--bg-panel-raised);
}

.btn-xs {
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  border-radius: var(--radius-sm);
}

/* Instrument Terminal Frame */
.terminal-window {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
  text-align: left;
}

.terminal-toolbar {
  background-color: var(--bg-inset);
  padding: 0.5rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.terminal-dot.red { background-color: var(--status-danger); }
.terminal-dot.yellow { background-color: var(--status-running); }
.terminal-dot.green { background-color: var(--status-success); }

.terminal-title-text {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  margin-left: 0.5rem;
}

.terminal-console-body {
  background-color: var(--bg-inset);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  line-height: 1.6;
}

/* Feature Panel Cards Grid */
.features-container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.section-header-box {
  margin-bottom: 1.5rem;
  text-align: center;
}

.section-header-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.section-header-box p {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 0.2rem;
}

.features-grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1rem;
}

.card-box {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.card-box-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.card-box h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-box p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Quickstart Panel */
.quickstart-box {
  max-width: 900px;
  width: 100%;
  margin: 0 auto 3rem;
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.quickstart-header-tabs {
  display: flex;
  background-color: var(--bg-inset);
  border-bottom: 1px solid var(--border);
}

.qs-tab-btn {
  padding: 0.6rem 1.2rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-tertiary);
  font-size: 0.82rem;
  font-weight: 700;
  font-family: var(--font-ui);
  cursor: pointer;
}

.qs-tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background-color: var(--accent-dim);
}

.qs-tab-panel {
  padding: 1.25rem;
  display: none;
  background-color: var(--bg-inset);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
}

.qs-tab-panel.active {
  display: block;
}

/* User Guide Layout */
.guide-main-layout {
  max-width: 1280px;
  width: 100%;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.5rem;
}

.guide-sidebar {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  position: sticky;
  top: 4.5rem;
  height: fit-content;
}

.guide-sidebar-group {
  margin-bottom: 1.25rem;
}

.guide-sidebar-title {
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--text-tertiary);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.guide-sidebar-link {
  display: block;
  padding: 0.35rem 0.6rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.2rem;
}

.guide-sidebar-link:hover, .guide-sidebar-link.active {
  color: var(--accent);
  background-color: var(--accent-dim);
  font-weight: 600;
}

.guide-content-area section {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.guide-content-area h1 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.guide-content-area h2 {
  font-size: 1.15rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}

.guide-content-area p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.guide-code-box {
  background-color: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin: 0.75rem 0;
  white-space: pre-wrap;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.18rem 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.badge-mono {
  background-color: var(--bg-inset);
  border: 1px solid var(--border);
  color: var(--text-tertiary);
}

/* Footer */
.app-footer {
  background-color: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: auto;
}