/* ==========================================================================
   FuncHole landing page — design tokens
   Pure black, Inter-led, floating pill nav + stacked pill CTAs, a real
   product-mockup hero panel. Monospace is reserved for actual code/terminal
   content, not structural type.
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Surfaces — pure black ground, considered greys on top */
  --bg: #000000;
  --surface: #0c0c0c;
  --surface-raised: #141414;
  --surface-2: #1a1a1a;
  --border: #232323;
  --border-strong: #333333;

  /* Text */
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.68);
  --text-faint: rgba(255, 255, 255, 0.42);

  /* Accent — FuncHole's own mark: deploy / success green, used sparingly */
  --accent: #38d996;
  --accent-dim: #38d99622;
  --accent-strong: #5ee6ac;
  --wire: #6fb6f0;
  --wire-dim: #6fb6f01f;

  /* Primary CTA surface — off-white, not pure white */
  --cta-bg: #ededed;
  --cta-bg-hover: #ffffff;
  --cta-text: #050505;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Rhythm */
  --gutter: 24px;
  --max: 1180px;
  --radius-pill: 999px;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 20px;
}

@media (min-width: 768px) {
  :root { --gutter: 40px; }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* faint ambient texture — sparse dots, not a rigid grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.09) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 60% 45% at 50% 8%, black 0%, transparent 70%);
}

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

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
  z-index: 1;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }

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

.eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* ---------- floating pill nav ---------- */

.nav-outer {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  padding: 0 var(--gutter);
  pointer-events: none;
}

.nav-outer .nav { pointer-events: auto; }

.hero { padding-top: 110px; }

.nav {
  width: 100%;
  max-width: 880px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 8px 8px 20px;
  border-radius: var(--radius-pill);
  background: rgba(12, 12, 12, 0.78);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  box-shadow: 0 20px 50px -25px rgba(0, 0, 0, 0.9);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  flex-shrink: 0;
}

.brand-mark {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: linear-gradient(155deg, var(--accent) 0%, var(--wire) 100%);
  display: grid;
  place-items: center;
  color: #05130d;
  font-size: 11px;
  font-weight: 800;
  font-family: var(--font-mono);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 26px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.nav-links a { cursor: pointer; transition: color 180ms ease; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }

@media (min-width: 860px) {
  .nav-links { display: flex; }
}

.nav-cta { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

/* ---------- buttons ---------- */

.btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
  white-space: nowrap;
}

.btn:active { transform: scale(0.98); }

.btn:focus-visible {
  outline: 2px solid var(--wire);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--cta-bg);
  color: var(--cta-text);
}

.btn-primary:hover {
  background: var(--cta-bg-hover);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

.btn-accent {
  background: var(--accent);
  color: #04140d;
}

.btn-accent:hover {
  background: var(--accent-strong);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

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

.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.04); }

.btn-sm { padding: 8px 16px; font-size: 13px; }

.btn-lg { padding: 14px 26px; font-size: 15px; }

.btn-block { width: 100%; }

/* ---------- hero ---------- */

.hero {
  padding: 76px 0 0;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.hero-badge .tag {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.hero h1 {
  font-size: clamp(36px, 6.4vw, 68px);
  max-width: 15ch;
  margin: 0 auto;
}

.hero h1 .accent { color: var(--accent); }

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 46ch;
  line-height: 1.65;
  margin: 22px auto 0;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 36px auto 0;
  max-width: 320px;
}

.hero-actions .btn { width: 100%; }

.hero-note {
  margin-top: 18px;
  font-size: 12.5px;
  color: var(--text-faint);
}

.hero-note a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 3px; }
.hero-note a:hover { color: var(--text); }

/* ---------- product mockup window ---------- */

.mockup-wrap {
  margin-top: 64px;
  display: flex;
  justify-content: center;
  padding: 0 var(--gutter);
}

.mockup {
  width: 100%;
  max-width: 980px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 60px 120px -50px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.mockup-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
}

.mockup-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.mockup-title { margin-left: 8px; font-size: 12.5px; color: var(--text-faint); font-family: var(--font-mono); }

.mockup-body {
  display: grid;
  gap: 1px;
  background: var(--border);
}

@media (min-width: 760px) {
  .mockup-body { grid-template-columns: 240px 1fr; }
}

.mockup-side {
  background: var(--surface);
  padding: 18px 16px;
  display: none;
}

@media (min-width: 760px) {
  .mockup-side { display: block; }
}

.mockup-side h5 {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 12px;
  font-weight: 600;
}

.mockup-tree {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 13px;
}

.mockup-tree-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--text-muted);
}

.mockup-tree-item.active {
  background: var(--surface-2);
  color: var(--text);
}

.mockup-tree-item .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--border-strong); flex-shrink: 0;
}

.mockup-tree-item.active .dot { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }

.mockup-main { background: var(--surface); padding: 20px; }

.mockup-main-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.mockup-main-head h4 { font-size: 15px; }

.pill-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.pill-status .dot { width: 6px; height: 6px; border-radius: 50%; }

.pill-status.ready { background: var(--accent-dim); color: var(--accent-strong); }
.pill-status.ready .dot { background: var(--accent); }

.pill-status.running { background: var(--wire-dim); color: var(--wire); }
.pill-status.running .dot { background: var(--wire); animation: pulse-dot 1.6s ease-in-out infinite; }

@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.mockup-cards {
  display: grid;
  gap: 10px;
}

@media (min-width: 560px) {
  .mockup-cards { grid-template-columns: 1fr 1fr; }
}

.mockup-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}

.mockup-card.is-active { border-color: var(--wire); }

.mockup-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.mockup-card-head span:first-child { font-size: 13.5px; font-weight: 600; }

.mockup-card code {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--surface-2);
  border-radius: 6px;
  padding: 7px 9px;
  margin-bottom: 8px;
  overflow-x: auto;
}

.mockup-card p { font-size: 12.5px; color: var(--text-faint); }

.mockup-composer {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-raised);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.mockup-composer span { font-size: 13px; color: var(--text-faint); }

.mockup-composer .send {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.mockup-composer .send svg { width: 14px; height: 14px; stroke: #04140d; }

/* ---------- sections ---------- */

section { padding: 96px 0; position: relative; z-index: 1; }

.section-head {
  max-width: 620px;
  margin: 0 auto 52px;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(26px, 3.6vw, 38px);
  margin-top: 14px;
}

.section-head p {
  color: var(--text-muted);
  font-size: 16px;
  margin-top: 16px;
  line-height: 1.7;
}

.border-t { border-top: 1px solid var(--border); }

/* ---------- reveal-on-scroll ---------- */

.js-enabled .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms cubic-bezier(0.16, 1, 0.3, 1), transform 620ms cubic-bezier(0.16, 1, 0.3, 1);
}

.js-enabled .reveal.is-visible { opacity: 1; transform: translateY(0); }

.js-enabled .reveal-stagger.is-visible > * {
  transition-delay: calc(var(--i, 0) * 70ms);
}

@media (prefers-reduced-motion: reduce) {
  .js-enabled .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- why grid ---------- */

.why-grid {
  display: grid;
  gap: 14px;
}

@media (min-width: 720px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1080px) {
  .why-grid { grid-template-columns: repeat(3, 1fr); }
}

.why-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: border-color 220ms ease, background-color 220ms ease;
}

.why-card:hover { border-color: var(--border-strong); background: var(--surface-raised); }

.why-card .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.why-card h3 { font-size: 16.5px; margin: 14px 0 10px; }

.why-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ---------- model steps ---------- */

.model {
  display: grid;
  gap: 14px;
  counter-reset: step;
}

@media (min-width: 860px) { .model { grid-template-columns: repeat(3, 1fr); } }

.model-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.model-step .tag {
  counter-increment: step;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.model-step .tag::before { content: '0' counter(step) '  '; color: var(--text-faint); }

.model-step h3 { font-size: 18px; margin: 12px 0 10px; }

.model-step p { font-size: 14.5px; color: var(--text-muted); line-height: 1.7; }

.model-step code {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  color: var(--wire);
  background: var(--wire-dim);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: var(--radius-pill);
}

/* ---------- architecture diagram ---------- */

.diagram-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 44px);
}

.diagram-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-faint);
  flex-wrap: wrap;
}

.diagram-caption strong { color: var(--wire); font-weight: 500; }

.flow-svg text { font-family: var(--font-mono); fill: var(--text); }

.flow-node rect { fill: var(--surface-raised); stroke: var(--border-strong); stroke-width: 1; }

.flow-node .label { font-size: 12.5px; font-weight: 600; }
.flow-node .sub { font-size: 9.5px; fill: var(--text-faint); letter-spacing: 0.02em; }

.flow-edge { fill: none; stroke: var(--border-strong); stroke-width: 1.4; }
.flow-edge-label { font-size: 9px; fill: var(--text-faint); }

.flow-pulse { fill: var(--accent); filter: drop-shadow(0 0 5px var(--accent)); }

.flow-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-faint);
}

.flow-legend span { display: inline-flex; align-items: center; gap: 7px; }

.legend-dot { width: 8px; height: 8px; border-radius: 2px; background: var(--border-strong); }
.legend-dot.accent { background: var(--accent); }

/* ---------- MCP section ---------- */

.mcp-grid {
  display: grid;
  gap: 44px;
  align-items: start;
}

@media (min-width: 980px) { .mcp-grid { grid-template-columns: 1fr 1fr; } }

.mcp-copy .eyebrow { justify-content: flex-start; }
.mcp-copy h2 { font-size: clamp(26px, 3.6vw, 36px); margin-top: 14px; text-align: left; }
.mcp-copy p { color: var(--text-muted); font-size: 16px; margin-top: 16px; line-height: 1.75; text-align: left; }

.mcp-list { margin-top: 26px; display: flex; flex-direction: column; gap: 14px; }

.mcp-list li { list-style: none; display: flex; gap: 12px; font-size: 14.5px; color: var(--text-muted); line-height: 1.6; }

.mcp-list svg { flex-shrink: 0; width: 16px; height: 16px; margin-top: 3px; stroke: var(--accent); }

.mcp-list b { color: var(--text); font-weight: 600; }

.agent-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }

.agent-badge {
  font-size: 12.5px;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
}

/* ---------- terminal panel (used inside MCP + quickstart) ---------- */

.terminal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.7);
}

.terminal-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px; border-bottom: 1px solid var(--border); background: var(--surface-raised);
}

.terminal-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border-strong); }
.terminal-title { margin-left: 8px; font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }

.terminal-body { padding: 22px 20px 26px; font-family: var(--font-mono); font-size: 13px; line-height: 1.85; }

.terminal-body .line { white-space: pre; }
.terminal-prompt { color: var(--text-faint); }
.terminal-path { color: var(--wire); }
.terminal-out { color: var(--text-muted); }
.terminal-ok { color: var(--accent); }
.terminal-cursor {
  display: inline-block; width: 7px; height: 15px; background: var(--accent);
  margin-left: 2px; vertical-align: -2px; animation: blink 1.1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* ---------- features ---------- */

.features { display: grid; gap: 14px; }

@media (min-width: 640px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .features { grid-template-columns: repeat(4, 1fr); } }

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  transition: border-color 220ms ease, background-color 220ms ease;
}

.feature:hover { background: var(--surface-raised); border-color: var(--border-strong); }

.feature .icon {
  width: 32px; height: 32px; border-radius: 10px;
  background: var(--wire-dim);
  display: grid; place-items: center; margin-bottom: 16px;
}

.feature .icon svg { width: 16px; height: 16px; stroke: var(--wire); }

.feature h3 { font-size: 15px; margin-bottom: 8px; }

.feature p { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; }

/* ---------- stack strip ---------- */

.stack-strip { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 12px; }

.stack-chip {
  font-size: 13px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.stack-chip::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--text-faint); }

/* ---------- quick start ---------- */

.quickstart {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  gap: 40px;
}

@media (min-width: 900px) { .quickstart { grid-template-columns: 1fr 1fr; align-items: center; } }

.quickstart h2 { font-size: clamp(24px, 3vw, 30px); text-align: left; }
.quickstart p { color: var(--text-muted); margin-top: 14px; font-size: 15px; line-height: 1.7; }

.service-table { margin-top: 22px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }

.service-row { display: flex; justify-content: space-between; padding: 10px 14px; font-size: 13px; }
.service-row:not(:last-child) { border-bottom: 1px solid var(--border); }
.service-row span:first-child { color: var(--text-muted); }
.service-row span:last-child { color: var(--wire); font-family: var(--font-mono); }

/* ---------- cta ---------- */

.cta { text-align: center; padding: 110px 0 120px; }

.cta h2 { font-size: clamp(30px, 4.8vw, 48px); max-width: 16ch; margin: 20px auto 0; }

.cta p { margin: 18px auto 0; max-width: 50ch; color: var(--text-muted); font-size: 16px; }

.cta-actions {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  margin: 36px auto 0; max-width: 320px;
}

.cta-actions .btn { width: 100%; }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--border); padding: 48px 0 40px; }

.footer-grid { display: flex; flex-direction: column; gap: 28px; }

@media (min-width: 760px) { .footer-grid { flex-direction: row; justify-content: space-between; align-items: flex-start; } }

.footer-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; }

.footer-tagline { margin-top: 10px; font-size: 13px; color: var(--text-faint); max-width: 34ch; }

.footer-links { display: flex; flex-wrap: wrap; gap: 32px; }

.footer-col h4 {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 12px; font-weight: 600;
}

.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.footer-col a { font-size: 13.5px; color: var(--text-muted); transition: color 180ms ease; cursor: pointer; }
.footer-col a:hover { color: var(--text); }

.footer-bottom {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  font-size: 12.5px; color: var(--text-faint);
}

/* ---------- utility ---------- */

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

::selection { background: var(--accent-dim); color: var(--text); }

:focus-visible { outline: 2px solid var(--wire); outline-offset: 2px; }