/* ==========================================================================
   ComputeIT — styles
   Tokens → base → layout → components → sections → motion/responsive
   ========================================================================== */

/* ───────── Design tokens ───────── */
:root {
  color-scheme: dark;

  --bg: #040506;
  --bg-alt: #07090b;
  --surface: #0b0e11;
  --surface-2: #12161b;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.15);
  --text: #e8edf2;
  --muted: #98a4b0;
  --accent: #4ee0c1;
  --accent-ink: #04120e;
  --accent-soft: rgba(78, 224, 193, 0.1);
  --hot: #ffb454;
  --cell-empty: rgba(255, 255, 255, 0.06);
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.9);

  --code-bg: #020304;
  --code-text: #d5dde6;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;

  --radius: 14px;
  --radius-sm: 9px;
  --header-h: 68px;
  --gutter: clamp(16px, 4vw, 32px);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f8fa;
  --bg-alt: #eaeff3;
  --surface: #ffffff;
  --surface-2: #f0f4f7;
  --line: rgba(10, 25, 40, 0.12);
  --line-strong: rgba(10, 25, 40, 0.24);
  --text: #0e1720;
  --muted: #4f5d6a;
  --accent: #087a67;
  --accent-ink: #ffffff;
  --accent-soft: rgba(8, 122, 103, 0.1);
  --hot: #c26a00;
  --cell-empty: rgba(10, 25, 40, 0.08);
  --shadow: 0 20px 40px -24px rgba(15, 30, 45, 0.35);
}

/* ───────── Base ───────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: 12px; }

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ───────── Buttons & small parts ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.35rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 0.55rem 1rem; font-size: 0.88rem; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { box-shadow: 0 8px 28px -8px var(--accent); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-strong); background: transparent; color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.2s, color 0.2s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn svg { width: 20px; height: 20px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface-2);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.lead { color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.15rem); max-width: 62ch; }

/* ───────── Header ───────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); }
.brand-mark { width: 30px; height: 30px; color: var(--accent); flex: none; }
.mark-hot { fill: var(--hot); }
.brand-name { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.brand-name b { color: var(--accent); font-weight: 700; }

.site-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.site-nav a:not(.btn) {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--muted);
  transition: color 0.2s, background 0.2s;
}
.site-nav a:not(.btn):hover,
.site-nav a.active { color: var(--text); background: var(--surface-2); }
.nav-cta { margin-left: 10px; }

.header-actions { display: flex; gap: 8px; align-items: center; }
.nav-toggle { display: none; }

.burger { position: relative; width: 18px; height: 14px; }
.burger i {
  position: absolute; left: 0; right: 0; height: 2px; border-radius: 2px;
  background: currentColor; transition: transform 0.25s ease, opacity 0.2s ease, top 0.25s ease;
}
.burger i:nth-child(1) { top: 0; }
.burger i:nth-child(2) { top: 6px; }
.burger i:nth-child(3) { top: 12px; }
.nav-open .burger i:nth-child(1) { top: 6px; transform: rotate(45deg); }
.nav-open .burger i:nth-child(2) { opacity: 0; }
.nav-open .burger i:nth-child(3) { top: 6px; transform: rotate(-45deg); }

/* Theme-toggle icon swap (moon shown while dark, sun shown while light) */
.icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: block; }
/* ───────── Hero ───────── */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(56px, 9vw, 120px) clamp(64px, 9vw, 110px);
  border-bottom: 1px solid var(--line);
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  -webkit-mask-image: radial-gradient(120% 90% at 30% 20%, #000 20%, transparent 80%);
  mask-image: radial-gradient(120% 90% at 30% 20%, #000 20%, transparent 80%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.3rem, 5.6vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 750;
  margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero .lead { margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 0; }

/* Terminal card */
.term {
  background: var(--code-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--code-text);
}
.term-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3a4450; }
.term-bar i:nth-child(1) { background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: 8px; color: #7d8996; font-size: 0.74rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.term-body { padding: 18px 18px 16px; display: grid; gap: 10px; }
.term-body .prompt { color: #4ee0c1; margin-right: 8px; }
.term-body .dim { color: #7d8996; }
.term-body .ok { color: #4ee0c1; margin-top: 4px; }
.term-body .ok span { margin-right: 8px; }
.term-body .ok em { font-style: normal; color: #ffb454; }
.bar-row { display: grid; grid-template-columns: 112px 1fr 38px; align-items: center; gap: 10px; }
.bar-row span { color: #a3afbb; }
.bar-row b { text-align: right; font-weight: 500; color: #e8edf2; }
.bar { height: 8px; border-radius: 4px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
.bar i {
  display: block; height: 100%; width: var(--v);
  border-radius: 4px;
  background: linear-gradient(90deg, #4ee0c1, #8af3dc);
  transform-origin: left;
  animation: grow 1.4s cubic-bezier(0.2, 0.7, 0.2, 1) both 0.4s;
}
@keyframes grow { from { transform: scaleX(0); } }
.cursor {
  display: inline-block; width: 8px; height: 1em; margin-left: 4px;
  background: #4ee0c1; vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ───────── Stats strip ───────── */
.strip { border-bottom: 1px solid var(--line); background: var(--bg-alt); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip-item {
  padding: 28px 20px;
  border-left: 1px solid var(--line);
  display: grid; gap: 4px;
}
.strip-item:first-child { border-left: 0; padding-left: 0; }
.strip-item strong {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: -0.03em;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.strip-item span { color: var(--muted); font-size: 0.88rem; line-height: 1.4; }

/* ───────── Sections ───────── */
.section { padding-block: clamp(64px, 9vw, 116px); }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-head { margin-bottom: clamp(32px, 5vw, 56px); max-width: 780px; }
.section-head h2 {
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 720;
  margin-bottom: 16px;
}

/* ───────── Cards ───────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 18px;
}
.card {
  display: flex; flex-direction: column; gap: 12px;
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); transform: translateY(-3px); box-shadow: var(--shadow); }
.card h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
.card p { color: var(--muted); font-size: 0.95rem; flex: 1; }
.card-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 4px;
}
.card-icon svg {
  width: 24px; height: 24px;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.field { display: grid; gap: 7px; min-width: 0; }
.field > span, .field > label { font-size: 0.82rem; font-weight: 600; color: var(--muted); display: flex; justify-content: space-between; gap: 8px; }

input[type="text"], input[type="email"], select, textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
select { appearance: none; -webkit-appearance: none; padding-right: 2.2rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%;
  background-size: 5px 5px; background-repeat: no-repeat; }
textarea { resize: vertical; min-height: 120px; }

/* ───────── Code window ───────── */
.code-window {
  background: var(--code-bg);
  border: 1px solid var(--line-strong);
  border-radius: calc(var(--radius) + 2px);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.code-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 0 12px 0 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.03);
}
.tablist { display: flex; overflow-x: auto; scrollbar-width: none; }
.tablist::-webkit-scrollbar { display: none; }
.tablist [role="tab"] {
  padding: 14px 16px;
  background: none; border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #8592a0;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.tablist [role="tab"]:hover { color: #e8edf2; }
.tablist [role="tab"][aria-selected="true"] { color: #4ee0c1; border-bottom-color: #4ee0c1; }
.copy-btn {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #a3afbb;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px 12px;
  border-radius: 7px;
  transition: color 0.2s, border-color 0.2s;
}
.copy-btn:hover { color: #4ee0c1; border-color: #4ee0c1; }

.code-panel { overflow-x: auto; }
.code-panel pre { margin: 0; padding: 22px 24px; min-width: max-content; }
.code-panel code {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--code-text);
  tab-size: 4;
}
.tok-c { color: #6b7a89; font-style: italic; }
.tok-s { color: #a5e08a; }
.tok-k { color: #ff8fa3; }
.tok-t { color: #ffb454; }
.tok-f { color: #6ec7ff; }
.tok-n { color: #d9a6ff; }
.tok-p { color: #4ee0c1; }
.code-caption {
  padding: 14px 24px 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #8e9aa7;
  font-size: 0.88rem;
}

/* ───────── Architecture ───────── */
.flow { display: flex; align-items: stretch; }
.node {
  flex: 1 1 0;
  min-width: 0;
  display: grid; gap: 2px; text-align: left;
  padding: 16px 16px 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.node:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.node[aria-selected="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent), 0 14px 32px -18px var(--accent);
}
.node-idx { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); }
.node-name { font-weight: 700; font-size: 1.02rem; letter-spacing: -0.01em; }
.node-sub { font-size: 0.8rem; color: var(--muted); }

.link {
  flex: 0 0 30px;
  align-self: center;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 12px);
  background-size: 12px 2px;
  opacity: 0.65;
  animation: dash-x 0.9s linear infinite;
}
@keyframes dash-x { to { background-position: 12px 0; } }
@keyframes dash-y { to { background-position: 0 12px; } }

.arch-panel {
  margin-top: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px);
  padding: clamp(20px, 3vw, 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
}
.arch-main h3 { font-size: 1.4rem; letter-spacing: -0.02em; margin-bottom: 10px; }
.arch-main p { color: var(--muted); margin-bottom: 16px; }
.arch-notes h4 {
  font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 12px;
}
.arch-notes ul { display: grid; gap: 10px; }
.arch-notes li { position: relative; padding-left: 22px; font-size: 0.93rem; }
.arch-notes li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 9px; height: 9px; border-radius: 2px; background: var(--accent);
}

/* ───────── Case results ───────── */
.cases { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 18px; }
.case {
  display: flex; flex-direction: column; gap: 10px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.case-metric {
  font-size: clamp(2.6rem, 5vw, 3.6rem);
  font-weight: 750; letter-spacing: -0.04em; line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.case-metric small { display: block; margin-top: 6px; font-size: 0.82rem; font-weight: 500; letter-spacing: 0; color: var(--muted); }
.case h3 { font-size: 1.15rem; margin-top: 8px; }
.case p:not(.case-metric) { color: var(--muted); font-size: 0.94rem; flex: 1; }

/* ───────── Contact ───────── */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-copy h2 { font-size: clamp(1.75rem, 3.6vw, 2.75rem); line-height: 1.1; letter-spacing: -0.03em; font-weight: 720; margin-bottom: 16px; }
.contact-list { margin-top: 30px; display: grid; gap: 16px; }
.contact-list li { display: grid; gap: 2px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.95rem; }
.contact-list li span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.contact-list a { color: var(--text); font-weight: 600; }
.contact-list a:hover { color: var(--accent); }

.form {
  display: grid; gap: 18px;
  padding: clamp(20px, 3vw, 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  box-shadow: var(--shadow);
}
/* Contact-form honeypot: off-screen rather than display:none, which some bots skip. */
.hp { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.form .btn { justify-self: start; }
.error { color: #ff6b6b; font-size: 0.8rem; min-height: 0; }
:root[data-theme="light"] .error { color: #c0262d; }
.field.invalid input, .field.invalid textarea { border-color: #ff6b6b; }
.form-status { font-size: 0.93rem; color: var(--accent); }

/* ───────── Footer ───────── */
.site-footer { border-top: 1px solid var(--line); padding-block: 40px; background: var(--bg-alt); }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 24px 40px; align-items: center; }
.footer-tag { color: var(--muted); font-size: 0.9rem; margin-top: 8px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 22px; color: var(--muted); font-size: 0.92rem; }
.footer-links a:hover { color: var(--accent); }
.copyright { grid-column: 1 / -1; color: var(--muted); font-size: 0.82rem; padding-top: 20px; border-top: 1px solid var(--line); }

/* ───────── Reveal on scroll (only when JS is running) ───────── */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js .reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .term { max-width: 560px; }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .strip-item:nth-child(3) { border-left: 0; padding-left: 0; }
  .strip-item:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .arch-panel { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  /* Mobile navigation drawer */
  .nav-toggle { display: inline-grid; }
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin: 0;
    padding: 12px var(--gutter) 22px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0s linear 0.22s;
  }
  .nav-open .site-nav {
    transform: none; opacity: 1; visibility: visible;
    transition-delay: 0s;
  }
  .site-nav a:not(.btn) { padding: 13px 12px; font-size: 1rem; }
  .nav-cta { margin: 10px 0 0; padding: 0.85rem 1rem; }

  /* Architecture flow goes vertical */
  .flow { flex-direction: column; }
  .link {
    flex: 0 0 22px; width: 2px; height: 22px;
    background: repeating-linear-gradient(180deg, var(--accent) 0 6px, transparent 6px 12px);
    background-size: 2px 12px;
    animation-name: dash-y;
  }
  .node { grid-template-columns: auto 1fr; column-gap: 12px; align-items: center; }
  .node-idx { grid-row: 1 / span 2; }
}

@media (max-width: 620px) {
  #hero-canvas { opacity: 0.5; }
  .field-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 100%; }
  .bar-row { grid-template-columns: 96px 1fr 36px; }
  .code-panel pre { padding: 16px; }
  .code-caption { padding-inline: 16px; }
  .strip-item { padding: 22px 14px; }
}

/* ───────── Reduced motion ───────── */
@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;
    transition-delay: 0s !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}