/* AIBox — landing page.
   Same design language as the local web console: dark terminal palette,
   orange brand, cyan and green accents, monospaced details. */

:root {
  --bg: #0b0e13;
  --bg-alt: #0e131a;
  --panel: #11161d;
  --panel-2: #151b24;
  --border: #26303d;
  --border-soft: #1c2430;
  --text: #c9d1d9;
  --text-strong: #f0f3f6;
  --muted: #8b98a8;
  --dim: #657181;
  --orange: #c2410c;
  --orange-bright: #f97316;
  --green: #4ade80;
  --yellow: #fbbf24;
  --red: #f87171;
  --cyan: #22d3ee;
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 6px;
  --radius-lg: 12px;
  --shell: 1140px;
  --header-h: 62px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 18px); }

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

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(194, 65, 12, 0.16), transparent 62%),
    radial-gradient(800px 420px at 6% 8%, rgba(34, 211, 238, 0.07), transparent 60%),
    radial-gradient(900px 600px at 50% 108%, rgba(74, 222, 128, 0.05), transparent 62%),
    var(--bg);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
}

h1, h2, h3, h4 { color: var(--text-strong); line-height: 1.2; margin: 0; font-weight: 700; }
p { margin: 0; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }
.dim { color: var(--dim); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--orange);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius) 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Header ------------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(11, 14, 19, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border-soft);
  background: rgba(11, 14, 19, 0.92);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.16em;
  background: linear-gradient(90deg, var(--cyan), var(--green) 42%, var(--orange-bright));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  padding: 6px 9px;
  border-radius: var(--radius);
  transition: color 0.15s ease, background 0.15s ease;
}
.site-nav a:hover { color: var(--text-strong); background: rgba(255, 255, 255, 0.04); text-decoration: none; }

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-left: 10px;
  flex-shrink: 0;
}
.lang-switch button {
  background: transparent;
  border: 0;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 9px;
  transition: color 0.15s ease, background 0.15s ease;
}
.lang-switch button:hover { color: var(--text); }
.lang-switch button.active { background: rgba(194, 65, 12, 0.22); color: var(--orange-bright); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  padding: 5px 9px;
  margin-left: auto;
}

/* Hero -------------------------------------------------------------------- */

.hero {
  padding: 84px 0 72px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 13px;
  background: var(--bg-alt);
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.16);
}

.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px);
  letter-spacing: -0.02em;
  margin: 22px 0 0;
}
.hero h1 .accent {
  background: linear-gradient(92deg, var(--cyan), var(--green) 45%, var(--orange-bright));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  margin-top: 20px;
  font-size: 17.5px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 54ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-meta {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dim);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta span::before { content: "▸"; color: var(--orange); }

/* Buttons ----------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-strong);
  font-size: 14.5px;
  font-weight: 600;
  transition: transform 0.12s ease, border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { border-color: var(--muted); background: var(--panel-2); text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.24), rgba(194, 65, 12, 0.24));
  border-color: rgba(249, 115, 22, 0.55);
  color: #ffd9bd;
}
.btn-primary:hover { background: rgba(194, 65, 12, 0.34); border-color: var(--orange-bright); }

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

.btn-sm { padding: 7px 13px; font-size: 13px; font-weight: 500; }

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

/* Screenshot frame -------------------------------------------------------- */

.shot {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  overflow: hidden;
  box-shadow:
    0 30px 70px -30px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}
.shot-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 13px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-alt);
}
.shot-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}
.shot-bar i:nth-child(1) { background: #3d4757; }
.shot-bar i:nth-child(2) { background: #333c4a; }
.shot-bar i:nth-child(3) { background: #2b333f; }
.shot-bar .shot-url {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.shot img { width: 100%; height: auto; display: block; }
.shot-glow {
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 60%;
  background: radial-gradient(ellipse at 50% 0%, rgba(249, 115, 22, 0.20), transparent 70%);
  pointer-events: none;
}

/* Sections ---------------------------------------------------------------- */

.section { padding: 84px 0; }
.section + .section { border-top: 1px solid var(--border-soft); }

.section-head { max-width: 720px; margin-bottom: 44px; }
.section-kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-bright);
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  margin: 12px 0 0;
  letter-spacing: -0.015em;
}
.section-head p { margin-top: 14px; color: var(--muted); font-size: 16.5px; }

/* Cards ------------------------------------------------------------------- */

.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }

.card {
  position: relative;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel), var(--bg-alt));
  padding: 24px 22px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.card:hover { border-color: var(--border); transform: translateY(-2px); }

.card-icon {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 17px;
  margin-bottom: 16px;
  background: rgba(194, 65, 12, 0.14);
  border: 1px solid rgba(249, 115, 22, 0.28);
  color: var(--orange-bright);
}
.card-icon.cyan { background: rgba(34, 211, 238, 0.12); border-color: rgba(34, 211, 238, 0.26); color: var(--cyan); }
.card-icon.green { background: rgba(74, 222, 128, 0.12); border-color: rgba(74, 222, 128, 0.26); color: var(--green); }

.card h3 { font-size: 17.5px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; line-height: 1.6; }

.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.feature-list li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}
.feature-list .tick {
  flex: 0 0 auto;
  margin-top: 1px;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* Code blocks ------------------------------------------------------------- */

.code {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #080b10;
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 10px 9px 15px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-alt);
}
.code-head span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--dim);
  letter-spacing: 0.05em;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  flex: 0 0 auto;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.copy-btn:hover { color: var(--text-strong); border-color: var(--muted); }
.copy-btn.done { color: var(--green); border-color: rgba(74, 222, 128, 0.5); }

.code pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text);
  white-space: pre;
}
.code .c-comment { color: var(--dim); }
.code .c-cmd { color: var(--green); }
.code .c-flag { color: var(--yellow); }
.code .c-path { color: var(--cyan); }

/* Quick start ------------------------------------------------------------ */

.quickstart { display: grid; gap: 0; }
.qs-step {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 34px;
  align-items: center;
  padding: 30px 0;
  border-top: 1px solid var(--border-soft);
}
.qs-step:last-child { border-bottom: 1px solid var(--border-soft); }
.qs-step .step-no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange-bright);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
  display: block;
}
.qs-step h3 { font-size: 19px; margin-bottom: 9px; }
.qs-step p { color: var(--muted); font-size: 14.5px; line-height: 1.6; }
.qs-step .code { min-width: 0; }

/* Split: the problem, and the answer ------------------------------------- */

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.split-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  background: linear-gradient(180deg, var(--panel), var(--bg-alt));
}
.split-card.risk { border-color: rgba(248, 113, 113, 0.28); }
.split-card.safe {
  border-color: rgba(74, 222, 128, 0.28);
  background:
    radial-gradient(500px 200px at 90% 0%, rgba(74, 222, 128, 0.07), transparent 70%),
    linear-gradient(180deg, var(--panel), var(--bg-alt));
}
.split-card h3 { font-size: 17.5px; margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
.split-card .tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--dim);
}
.split-card.risk .tag { color: var(--red); border-color: rgba(248, 113, 113, 0.4); }
.split-card.safe .tag { color: var(--green); border-color: rgba(74, 222, 128, 0.4); }
.split-card p { color: var(--muted); font-size: 14.5px; margin-top: 10px; }

.risk-list { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 11px; }
.risk-list li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--muted);
}
.risk-list .mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  margin-top: 1px;
}
.risk-list.risk .mark { color: var(--red); }
.risk-list.safe .mark { color: var(--green); }

/* Comparison: a container or a virtual machine --------------------------- */

.compare {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}
.compare-row {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
  border-top: 1px solid var(--border-soft);
}
.compare-row:first-child { border-top: 0; }
.compare-row > div { padding: 13px 18px; font-size: 14px; line-height: 1.5; }
.compare-row > div + div { border-left: 1px solid var(--border-soft); }
.compare-row.head { background: var(--bg-alt); }
.compare-row.head > div { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--dim); }
.compare-row.head .win { color: var(--orange-bright); }
.compare-row .label { color: var(--text-strong); font-weight: 600; }
.compare-row .col { color: var(--muted); }
.compare-row .col.risk { color: rgba(248, 113, 113, 0.85); }
.compare-row .win { background: rgba(194, 65, 12, 0.07); color: var(--text); }
.compare-row .win .label { color: var(--orange-bright); }

.compare-hint { display: none; }

/* Practices ------------------------------------------------------------- */

.practices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.practice {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel), var(--bg-alt));
  padding: 20px 22px;
}
.practice .mark {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.28);
  color: var(--cyan);
}
.practice h3 { font-size: 15.5px; margin-bottom: 6px; }
.practice p { color: var(--muted); font-size: 14px; line-height: 1.55; }
.practice code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
}

/* Note / callout --------------------------------------------------------- */

.note {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  border: 1px solid var(--border-soft);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius);
  background: var(--bg-alt);
  padding: 14px 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}
.note .mark { color: var(--orange-bright); font-family: var(--font-mono); flex: 0 0 auto; }
.note b { color: var(--text-strong); font-weight: 600; }

/* Diagram ----------------------------------------------------------------- */

.diagram {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel), var(--bg-alt));
  padding: 30px 26px;
  overflow-x: auto;
}
.diagram svg { width: 100%; height: auto; min-width: 620px; display: block; }
.dg-box { fill: var(--bg-alt); stroke: var(--border); stroke-width: 1; }
.dg-box.accent { stroke: rgba(249, 115, 22, 0.5); }
.dg-boundary {
  fill: rgba(34, 211, 238, 0.03);
  stroke: rgba(34, 211, 238, 0.4);
  stroke-width: 1;
  stroke-dasharray: 5 4;
}
.dg-boundary-label {
  fill: rgba(34, 211, 238, 0.75);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.dg-label { fill: var(--text-strong); font-family: var(--font-ui); font-size: 13px; font-weight: 600; }
.dg-sub { fill: var(--dim); font-family: var(--font-mono); font-size: 10.5px; }
.dg-line { stroke: var(--border); stroke-width: 1.2; fill: none; }
.dg-line.accent { stroke: rgba(249, 115, 22, 0.65); }
.dg-arrow { fill: var(--dim); }
.dg-arrow.accent { fill: var(--orange-bright); }
.dg-text { fill: var(--muted); font-family: var(--font-mono); font-size: 10.5px; }

/* Showcase ---------------------------------------------------------------- */

.showcase { display: grid; gap: 26px; }
.showcase figure { margin: 0; }
.showcase figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.showcase figcaption b { color: var(--text-strong); font-weight: 600; }
.showcase figcaption .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange-bright);
  flex: 0 0 auto;
}

/* Commands ---------------------------------------------------------------- */

.cmd-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 2px 22px; }
.cmd {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 14px;
}
.cmd code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--green);
  white-space: nowrap;
}
.cmd span { color: var(--muted); font-size: 13.5px; }

/* Requirements ------------------------------------------------------------ */

.req { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.req h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 12px;
}
.req ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14.5px; }
.req li { margin-bottom: 6px; }
.req code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
}

/* FAQ --------------------------------------------------------------------- */

.faq { display: grid; gap: 10px; max-width: 860px; }
.faq details {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.15s ease;
}
.faq details[open] { border-color: var(--border); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 15px 20px;
  font-weight: 600;
  color: var(--text-strong);
  font-size: 15px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--orange-bright);
  font-size: 18px;
  flex: 0 0 auto;
}
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 20px 17px; color: var(--muted); font-size: 14.5px; }
.faq .answer code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
}

/* CTA + footer ------------------------------------------------------------ */

.cta {
  border: 1px solid rgba(249, 115, 22, 0.35);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(600px 200px at 12% 0%, rgba(34, 211, 238, 0.08), transparent 70%),
    radial-gradient(700px 240px at 92% 100%, rgba(194, 65, 12, 0.16), transparent 70%),
    var(--panel);
  padding: 46px 40px;
  text-align: center;
}
.cta h2 { font-size: clamp(24px, 3vw, 32px); }
.cta p { margin: 14px auto 0; color: var(--muted); max-width: 56ch; }
.cta .hero-actions { justify-content: center; margin-top: 26px; }

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 30px 0 44px;
  color: var(--dim);
  font-size: 13.5px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: center;
  justify-content: space-between;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text-strong); }

/* Reveal on scroll -------------------------------------------------------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive -------------------------------------------------------------- */

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 56px; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .req { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .qs-step { grid-template-columns: 1fr; gap: 18px; }
  .practices { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .shell, .header-inner { padding: 0 18px; }
  .section { padding: 60px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .brand-tag { display: none; }
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 18px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 18px 30px -20px rgba(0, 0, 0, 0.9);
  }
  .site-nav.open a { padding: 9px 10px; }
  .nav-toggle { display: inline-flex; }
  .lang-switch { margin-left: 0; }
  .hero h1 { font-size: clamp(32px, 8.5vw, 44px); }
  .hero-lede { font-size: 16px; }
  .cta { padding: 34px 22px; }
  .cmd-list { grid-template-columns: 1fr; }
  .compare { overflow-x: auto; }
  .compare-row { min-width: 620px; }
  .compare-hint {
    display: block;
    margin: 10px 0 0;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--dim);
  }
  .compare-row > div { padding: 11px 13px; font-size: 13px; }
  .practices { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
}