/* ============================================================
   STRACECTL THEME — main.css
   Dark terminal aesthetic with animated UI components
   ============================================================ */

/* ── 1. CSS Variables ──────────────────────────────────────── */
:root {
  --bg:          #0a0e17;
  --surface:     #0d1117;
  --surface-2:   #161b22;
  --surface-3:   #1c2128;
  --border:      #30363d;
  --border-2:    #21262d;

  --primary:     #00d4aa;
  --primary-dim: rgba(0, 212, 170, 0.15);
  --secondary:   #58a6ff;
  --accent:      #bc8cff;

  --error:       #f85149;
  --warning:     #d29922;
  --success:     #3fb950;

  --text:        #e6edf3;
  --text-2:      #c9d1d9;
  --muted:       #8b949e;
  --muted-2:     #6e7681;

  --font-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --radius:      8px;
  --radius-lg:   16px;
  --radius-xl:   24px;

  --nav-h:       64px;
  --max-w:       1200px;
  --max-w-text:  720px;

  --transition:  150ms ease;
  --transition-md: 300ms ease;
}

/* ── 2. Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

img, svg { display: block; max-width: 100%; }

button { cursor: pointer; font-family: var(--font-sans); }

code, pre, kbd {
  font-family: var(--font-mono);
}

/* ── 3. Utilities ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.hidden { display: none !important; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── 4. Animations ─────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0.5deg); }
  50%       { transform: translateY(-10px) rotate(-0.5deg); }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 0 rgba(0,212,170,0); }
  50%       { box-shadow: 0 0 40px rgba(0,212,170,0.25); }
}

@keyframes border-glow {
  0%, 100% { border-color: var(--border); }
  50%       { border-color: rgba(0,212,170,0.5); }
}

@keyframes scanline {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,212,170,0.6); }
  50%       { box-shadow: 0 0 0 6px rgba(0,212,170,0); }
}

@keyframes bar-grow {
  from { width: 0; }
  to   { width: var(--bar-w, 100%); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Scroll reveal base state */
.reveal, .reveal-right {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-right {
  transform: translateX(40px);
}

.reveal.visible, .reveal-right.visible {
  opacity: 1;
  transform: none;
}

/* Delayed reveal: used for documentation body to appear after header animation */
.reveal--delayed {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal--delayed.visible {
  opacity: 1;
  transform: none;
}

/* Ensure reveal--delayed children do not use the nth-child stagger */
.reveal--delayed .reveal,
.reveal--delayed .reveal-right {
  transition-delay: 0s !important;
}

/* Stagger children */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal:nth-child(6) { transition-delay: 0.5s; }

/* ── 5. Navigation ─────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background var(--transition-md), box-shadow var(--transition-md),
              backdrop-filter var(--transition-md);
}

.site-header.scrolled {
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow:
    0 1px 0 var(--border-2),
    0 4px 24px rgba(0, 0, 0, 0.55),
    0 1px 6px rgba(0, 212, 170, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  flex-shrink: 0;
}

.logo-bracket {
  color: var(--primary);
  letter-spacing: -1px;
}

.logo-text { color: var(--text); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-2);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-github {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition),
              background var(--transition);
}

.nav-github:hover {
  color: var(--text);
  border-color: var(--primary);
  background: var(--primary-dim);
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.5rem;
  margin-left: auto;
}

.nav-burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--muted);
  border-radius: 2px;
  transition: var(--transition-md);
}

/* ── 6. Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all var(--transition-md);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #00b89a 100%);
  color: #0a0e17;
  border-color: transparent;
  box-shadow: 0 0 20px rgba(0,212,170,0.2);
}

.btn-primary:hover {
  box-shadow: 0 0 32px rgba(0,212,170,0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-dim);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: transparent;
}

.btn-ghost:hover { color: var(--text); }

.btn-lg { padding: 0.8rem 1.8rem; font-size: 1rem; }

/* ── 7. Hero ───────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

#particle-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Subtle scanline overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-dim);
  border: 1px solid rgba(0,212,170,0.3);
  border-radius: 100px;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 1.25rem;
  width: fit-content;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.hero-badge:hover {
  background: rgba(0,212,170,0.18);
  border-color: rgba(0,212,170,0.6);
}

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: dot-pulse 2s infinite;
}

.hero-headline {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-2);
  max-width: 460px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero-install {
  display: flex;
  align-items: center;
}

.install-snippet {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--primary);
  max-width: 100%;
  overflow: hidden;
}

/* ── 8. Terminal Window ────────────────────────────────────── */
.hero-terminal {
  filter: drop-shadow(0 24px 80px rgba(0,212,170,0.12));
}

.terminal-window {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: float 6s ease-in-out infinite, glow-pulse 4s ease-in-out infinite;
  animation-play-state: running;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-2);
}

.terminal-dots { display: flex; gap: 6px; }

.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}

.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 auto;
}

.terminal-body {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  color: #c9d1d9;
  min-height: 260px;
  overflow: hidden;
}

.terminal-prompt {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.prompt-symbol { color: var(--primary); }
.prompt-text   { color: var(--text); }

.cursor-block {
  color: var(--primary);
  animation: blink-cursor 1s step-end infinite;
}

/* TUI output inside terminal */
.tui-output { font-size: 0.68rem; }

.tui-header-bar {
  background: #1c2128;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  color: #e6edf3;
}

.tui-name    { color: var(--primary); font-weight: 600; }
.tui-cmd     { color: var(--secondary); }
.tui-elapsed { color: var(--muted); }

.tui-stats   { margin-left: auto; font-size: 0.65rem; }
.stat-num    { color: var(--primary); }
.stat-err    { color: var(--error); }

.tui-divider { color: #21262d; margin: 0.25rem 0; overflow: hidden; white-space: nowrap; }

.tui-catbar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0.2rem 0;
  font-size: 0.65rem;
}

.cat { padding: 0.1rem 0.3rem; border-radius: 3px; font-weight: 500; }
.cat em { font-style: normal; color: var(--muted); font-size: 0.9em; }
.cat-io    { color: #58a6ff; background: rgba(88,166,255,0.1); }
.cat-fs    { color: #79c0ff; background: rgba(121,192,255,0.1); }
.cat-net   { color: #00d4aa; background: rgba(0,212,170,0.1); }
.cat-mem   { color: #bc8cff; background: rgba(188,140,255,0.1); }
.cat-proc  { color: #f0883e; background: rgba(240,136,62,0.1); }
.cat-other { color: #8b949e; background: rgba(139,148,158,0.1); }

.tui-table-header {
  display: grid;
  grid-template-columns: 70px 32px 40px 1fr 48px 48px 44px 36px;
  gap: 0.25rem;
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 600;
  padding: 0 0.25rem;
  letter-spacing: 0.04em;
}

.tui-rows { display: flex; flex-direction: column; gap: 1px; }

.tui-row {
  display: grid;
  grid-template-columns: 70px 32px 40px 1fr 48px 48px 44px 36px;
  gap: 0.25rem;
  padding: 0.15rem 0.25rem;
  border-radius: 3px;
  align-items: center;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.tui-row.visible {
  opacity: 1;
  transform: none;
}

.tui-row.selected { background: rgba(0,212,170,0.08); }
.tui-row.row-err  { background: rgba(248,81,73,0.06); }
.tui-row.row-warn { background: rgba(210,153,34,0.06); }

.row-name   { color: #79c0ff; display: flex; gap: 3px; }
.row-selector { color: var(--primary); }
.row-cat    { color: var(--muted); font-size: 0.62rem; }
.row-calls  { color: var(--text); text-align: right; }
.row-freq   { color: var(--primary); font-size: 0.7em; overflow: hidden; }
.row-avg    { color: var(--muted); text-align: right; }
.row-max    { color: var(--warning); text-align: right; }
.row-err-n  { color: var(--error); text-align: right; }
.row-erp    { color: var(--error); text-align: right; }

.tui-alert {
  background: rgba(210,153,34,0.12);
  border: 1px solid rgba(210,153,34,0.3);
  border-radius: 3px;
  padding: 0.2rem 0.5rem;
  color: var(--warning);
  font-size: 0.65rem;
  margin: 0.2rem 0;
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.tui-keybar {
  color: #4d5566;
  font-size: 0.62rem;
  margin-top: 0.2rem;
  overflow: hidden;
  white-space: nowrap;
}

/* ── 9. Section common ─────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto;
}

/* ── 10. Features ──────────────────────────────────────────── */
.features-section {
  /* further reduced vertical padding to tighten layout */
  padding: 3rem 0;
  position: relative;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform var(--transition-md),
              border-color var(--transition-md),
              box-shadow var(--transition-md);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,170,0.35);
  box-shadow: 0 8px 40px rgba(0,212,170,0.08);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 0.9rem;
  display: block;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}

.feature-card code {
  font-size: 0.82em;
  color: var(--primary);
  background: var(--primary-dim);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

/* ── 11. Modes ─────────────────────────────────────────────── */
.modes-section {
  /* slightly reduced to keep sections visually closer */
  padding: 2.5rem 0;
  background: var(--surface);
  position: relative;
}

.modes-section::before,
.modes-section::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.modes-section::before { top: 0; }
.modes-section::after  { bottom: 0; }

.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.mode-card {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition-md), box-shadow var(--transition-md);
}

.mode-card:hover {
  border-color: rgba(88,166,255,0.35);
  box-shadow: 0 8px 40px rgba(88,166,255,0.08);
}

.mode-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.mode-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.mode-card p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.mode-code {
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
}

.mode-code code {
  font-size: 0.78rem;
  color: var(--primary);
  display: block;
  line-height: 1.6;
}

/* ── Scenarios (compact spacing) ───────────────────────────────── */
.scenarios-section {
  /* slightly tighter than other sections to avoid large visual gaps */
  padding: 3.5rem 0;
  position: relative;
}

.scenarios-section .section-header {
  margin-bottom: 1.6rem;
}

.scenarios-section .modes-grid {
  margin-top: 0.5rem;
  gap: 1.25rem;
}

.scenarios-section .mode-card {
  padding: 1.6rem;
}

/* ── 12. Install Section ───────────────────────────────────── */
.install-section {
  padding: 7rem 0;
  position: relative;
}

.install-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.install-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.install-text p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.install-text code {
  color: var(--primary);
  background: var(--primary-dim);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-size: 0.88em;
}

.install-tab-group {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border-2);
  padding-bottom: 0;
}

.install-tab {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--transition), border-color var(--transition);
}

.install-tab:hover { color: var(--text); }

.install-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.install-tab-content {
  display: none;
}

.install-tab-content.active {
  display: block;
}

.code-block {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: 1.25rem 1.25rem 1.25rem 1.25rem;
}

.code-block pre {
  overflow-x: auto;
  padding-right: 2.5rem;
}

.code-block code {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.7;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: var(--radius);
  padding: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), border-color var(--transition),
              background var(--transition);
}

.copy-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-dim);
}

.copy-btn.copied { color: var(--success); border-color: var(--success); }

/* Copy btn inside hero install snippet */
.install-snippet .copy-btn {
  position: static;
  padding: 0.2rem;
  background: none;
  border: none;
}

/* ── 13. Screenshot Carousel ───────────────────────────────── */
.showcase-section {
  /* tighten showcase spacing to improve flow */
  padding: 4rem 0;
  position: relative;
}

.showcase-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.showcase-carousel {
  max-width: 960px;
  margin: 0 auto;
}

/* Viewport: clip overflow, fixed aspect ratio slot */
.carousel-viewport {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid var(--border);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 60px rgba(0,212,170,0.06);
}

/* Track: CSS grid single-cell overlay so all slides stack at the same position */
.carousel-track {
  display: grid;
  grid-template-rows: auto;
  grid-template-columns: 100%;
}

/* Every slide placed at row 1 / col 1 so they all overlap */
.carousel-slide {
  grid-row: 1;
  grid-column: 1;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.9s ease, visibility 0s linear 0.9s;
  pointer-events: none;
  min-width: 0;
}

.carousel-slide.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.9s ease, visibility 0s linear 0s;
}

/* Frame: chrome bar + image */
.slide-frame {
  display: flex;
  flex-direction: column;
}

.slide-chrome {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--surface-3);
  border-bottom: 1px solid var(--border-2);
  flex-shrink: 0;
}

.slide-chrome-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0 auto;
}

.carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* Footer: captions + controls + progress */
.carousel-footer {
  padding: 1.5rem 0 0;
}

/* Captions */
.carousel-captions {
  min-height: 3.2rem;
  text-align: center;
  margin-bottom: 1.25rem;
  position: relative;
}

.carousel-caption {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}

.carousel-caption.active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.caption-label {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.caption-desc {
  font-size: 0.85rem;
  color: var(--muted);
  max-width: 560px;
}

/* Controls row */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.carousel-prev,
.carousel-next {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  transition: color var(--transition), border-color var(--transition),
              background var(--transition);
}

.carousel-prev:hover,
.carousel-next:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-dim);
}

.carousel-dots {
  display: flex;
  gap: 0.4rem;
}

.carousel-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  padding: 0;
  transition: background var(--transition-md), transform var(--transition-md),
              width var(--transition-md);
  cursor: pointer;
}

.carousel-dot.active {
  background: var(--primary);
  width: 20px;
  border-radius: 4px;
}

/* Progress bar */
.carousel-progress-bar {
  height: 2px;
  background: var(--border-2);
  border-radius: 2px;
  overflow: hidden;
}

.carousel-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transition: width linear;
}

/* ── 14. CTA ───────────────────────────────────────────────── */
.cta-section {
  padding: 7rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.cta-inner p {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── 14. Hero scroll hint ──────────────────────────────────── */
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll-hint span {
  display: block;
  width: 22px; height: 36px;
  border: 2px solid var(--border);
  border-radius: 11px;
  position: relative;
  margin: 0 auto;
}

.hero-scroll-hint span::before {
  content: '';
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px; height: 3px;
  background: var(--primary);
  border-radius: 50%;
  animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
  0% { opacity: 1; top: 5px; }
  80% { opacity: 0; top: 20px; }
  100% { opacity: 0; top: 5px; }
}

/* ── 15. Inner pages ───────────────────────────────────────── */
.inner-page {
  min-height: calc(100vh - var(--nav-h));
  padding: calc(var(--nav-h) + 3rem) 0 5rem;
}

.inner-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3.5rem;
  align-items: start;
}

/* Single page without sidebar */
.inner-layout:not(:has(.docs-sidebar)) {
  grid-template-columns: 1fr;
  max-width: var(--max-w-text);
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
}

.docs-nav { display: flex; flex-direction: column; }
.docs-nav-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-2);
  padding: 0 0.5rem;
  margin-bottom: 0.5rem;
}

.docs-nav a {
  font-size: 0.875rem;
  color: var(--muted);
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius);
  border-left: 2px solid transparent;
  transition: color var(--transition), background var(--transition),
              border-color var(--transition);
}

.docs-nav a:hover { color: var(--text); background: var(--surface-2); }
.docs-nav a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background: var(--primary-dim);
}

/* ── 16. Prose / Markdown ──────────────────────────────────── */
.prose { min-width: 0; }

/* Keep doc content cards clear of the fixed back-to-top button */
.inner-layout .prose { padding-right: 5rem; }

/* Ensure the child-page card list spans the full width below the sidebar/article
   so cards don't appear in the left column or overlap the sidebar. */


.page-header {
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-2);
}

.page-header h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.page-description {
  color: var(--muted);
  font-size: 1.05rem;
}

.prose h1, .prose h2, .prose h3,
.prose h4, .prose h5, .prose h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.prose h2 { font-size: 1.4rem; border-bottom: 1px solid var(--border-2); padding-bottom: 0.4rem; }
.prose h3 { font-size: 1.15rem; }
.prose h4 { font-size: 1rem; }

.prose p { margin-bottom: 1rem; color: var(--text-2); line-height: 1.75; }
.prose ul, .prose ol { margin-bottom: 1rem; padding-left: 1.5rem; color: var(--text-2); }
.prose li { margin-bottom: 0.3rem; line-height: 1.7; }

.prose a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: rgba(0,212,170,0.3);
  transition: text-decoration-color var(--transition);
}

.prose a:hover { text-decoration-color: var(--primary); }

.prose strong { color: var(--text); font-weight: 600; }

.prose code {
  font-size: 0.85em;
  color: var(--primary);
  background: var(--primary-dim);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  border: 1px solid rgba(0,212,170,0.2);
}

.prose pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
  position: relative;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-2);
  font-size: 0.85rem;
}

.prose blockquote {
  border-left: 3px solid var(--primary);
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--primary-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-2);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.prose th, .prose td {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border-2);
  text-align: left;
}

.prose th {
  background: var(--surface-2);
  font-weight: 600;
  color: var(--text);
}

.prose td { color: var(--text-2); }
.prose tr:hover td { background: var(--surface-2); }

.prose kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.78rem;
  color: var(--text);
  min-width: 1.5rem;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border-2);
  margin: 2rem 0;
}

/* Subtle full-width section divider used on the homepage */
.section-divider {
  /* Use same horizontal faded-line style as features-section::before */
  height: 1px;
  display: block;
  width: 100%;
  margin: 2rem 0;
  /* layered subtle gradient: faint edges, very light centre to match existing dividers */
  background: linear-gradient(
    90deg,
    rgba(33,38,45,0) 0%,
    rgba(255,255,255,0.02) 8%,
    rgba(33,38,45,0.06) 50%,
    rgba(255,255,255,0.02) 92%,
    rgba(33,38,45,0) 100%
  );
}

/* Doc list cards */
.list-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.list-card {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: border-color var(--transition-md), transform var(--transition-md);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 84px;
}

.list-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.list-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  margin: 0;
}

.list-card p {
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}
/* ── 17. Footer ────────────────────────────────────────────── */
/* ── 17. Footer ────────────────────────────────────────────── */

/* ── 17. Footer ────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-2);
  padding: 3rem 0;
  background: var(--surface);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2rem;
  align-items: start;
}

.footer-brand .nav-logo {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  display: inline-flex;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 220px;
  margin-bottom: 0.35rem;
}

.footer-license {
  font-size: 0.78rem;
  color: var(--muted-2);
}

.footer-col { display: flex; flex-direction: column; gap: 0.5rem; }

.footer-col-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-2);
  margin-bottom: 0.25rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--muted);
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--primary); }

/* ── 18. Syntax highlighting (Hugo) ────────────────────────── */
.highlight {
  background: var(--surface-2) !important;
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--border);
}

.highlight pre {
  background: transparent !important;
  border: none;
  margin: 0;
  padding: 1.25rem;
}

/* ── 19. Architecture Diagram ─────────────────────────────── */
.arch-diagram {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
  overflow-x: auto;
}

.arch-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1.25rem;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 148px;
  text-align: center;
  white-space: nowrap;
  flex-shrink: 0;
}

.arch-node-sidecar {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(0,212,170,0.12),
              inset 0 0 24px rgba(0,212,170,0.05);
}

.arch-node-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font-sans);
}

.arch-node-code {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--primary);
  background: var(--primary-dim);
  padding: 0.1em 0.5em;
  border-radius: 4px;
  border: 1px solid rgba(0,212,170,0.2);
}

.arch-arrow {
  display: flex;
  align-items: center;
  color: var(--muted);
  flex-shrink: 0;
}

.arch-arrow-ptrace {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  color: var(--primary);
}

.arch-edge-label {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--primary);
  white-space: nowrap;
}

.arch-pod {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem 1rem;
  border: 1px dashed var(--secondary);
  border-radius: var(--radius-lg);
  background: rgba(88,166,255,0.03);
  flex-shrink: 0;
}

.arch-pod-title {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--secondary);
  white-space: nowrap;
}

.arch-pod-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ── 20. Responsive ────────────────────────────────────────── */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .modes-grid    { grid-template-columns: repeat(1, 1fr); }
  .hero-inner    { grid-template-columns: 1fr; gap: 3rem; }
  .hero-terminal { max-width: 560px; margin: 0 auto; }
  .install-inner { grid-template-columns: 1fr; }
  .footer-inner  { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand  { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  .nav-links, .nav-actions { display: none; }

  .nav-burger {
    display: flex;
    margin-left: auto;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(10,14,23,0.97);
    backdrop-filter: blur(20px);
    padding: 1rem 1.5rem 2rem;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-2);
    z-index: 99;
  }

  .nav-links.open + .nav-actions {
    display: flex;
    position: fixed;
    top: var(--nav-h);
    right: 1.5rem;
    padding-top: 1rem;
    z-index: 100;
  }

  .features-grid  { grid-template-columns: 1fr; }
  .modes-grid     { grid-template-columns: 1fr; }
  .install-inner  { grid-template-columns: 1fr; gap: 2rem; }
  .inner-layout   { grid-template-columns: 1fr; }
  .docs-sidebar   { display: none; }
  .inner-layout .prose { padding-right: 0; }
  .footer-inner   { grid-template-columns: 1fr 1fr; }
  .footer-brand   { grid-column: 1 / -1; }
  .list-cards     { grid-template-columns: 1fr; }
  .cta-actions    { flex-direction: column; align-items: center; }

  .hero-headline  { font-size: 2.2rem; }
  .hero-sub       { font-size: 1rem; }
  .hero-terminal  { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-inner { grid-template-columns: 1fr; }
  .modes-grid   { grid-template-columns: 1fr; }
  .caption-desc { font-size: 0.78rem; }
  .carousel-captions { min-height: 4rem; }
}

/* ── Back-to-top button ────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 3.5rem;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--primary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition-md), transform var(--transition-md),
              visibility var(--transition-md), background var(--transition),
              border-color var(--transition);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--primary-dim);
  border-color: var(--primary);
}

#back-to-top:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

@media (max-width: 480px) {
  #back-to-top { bottom: 1.25rem; right: 2rem; }
}