/* ==========================================================================
   Keyflow · product site
   One stylesheet for every page.  Sections:
   1. tokens          6. navigation        11. tables & code
   2. base            7. hero              12. faq / callouts
   3. utilities       8. sections          13. carousel & lightbox
   4. buttons         9. cards & splits    14. footer
   5. header          10. steps & stats    15. responsive & motion
   ========================================================================== */

/* 1. tokens ---------------------------------------------------------------- */
:root {
  --bg: #07070c;
  --bg-2: #0c0c13;
  --surface: #101019;
  --card: #13131d;
  --card-2: #171722;
  --line: #23232f;
  --line-2: #2e2e3d;
  --text: #f1f0f6;
  --text-2: #cfcedb;
  --muted: #9898ab;
  --gold: #e6c169;
  --gold-2: #c39a3c;
  --gold-3: #8a6a22;
  --violet: #8b3dff;
  --cyan: #56d8e8;
  --rose: #ff6b8b;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 9px;
  --max: 1200px;
  --gutter: clamp(18px, 4vw, 40px);
  --head-h: 68px;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-2: 0 18px 50px -24px rgba(0, 0, 0, .9);
  --shadow-3: 0 40px 100px -40px rgba(0, 0, 0, .95);
  --glow-gold: 0 10px 34px -12px rgba(230, 193, 105, .55);
  --glow-violet: 0 0 90px -20px rgba(139, 61, 255, .55);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Playfair Display", "Times New Roman", Georgia, serif;
  --font-mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

/* 2. base ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--head-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  isolation: isolate;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Stage ambience: two soft lights and a fine grain, fixed behind everything. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(60rem 40rem at 12% -8%, rgba(139, 61, 255, .16), transparent 62%),
    radial-gradient(52rem 34rem at 92% 4%, rgba(230, 193, 105, .1), transparent 60%),
    radial-gradient(70rem 50rem at 50% 108%, rgba(86, 216, 232, .07), transparent 65%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.045'/%3E%3C/svg%3E");
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--gold); }
h1, h2, h3, h4 { margin: 0; line-height: 1.14; font-weight: 700; letter-spacing: -.015em; }
h1, h2 { font-family: var(--font-display); }
h3, h4 { font-family: var(--font-body); letter-spacing: -.01em; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
code, kbd, samp { font-family: var(--font-mono); font-size: .88em; }
kbd {
  display: inline-block; padding: 2px 7px; border-radius: 6px;
  background: #1b1b26; border: 1px solid var(--line-2); border-bottom-width: 2px;
  color: var(--text); font-size: 12.5px; font-weight: 600; line-height: 1.5; white-space: nowrap;
}
em { font-style: normal; }
.gold-text {
  background: linear-gradient(96deg, #f7dd94, var(--gold) 42%, #b98f34);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
::selection { background: rgba(230, 193, 105, .28); color: #fff; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

/* 3. utilities ------------------------------------------------------------- */
.container { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(56px, 8vw, 104px); position: relative; }
.section + .section { border-top: 1px solid rgba(35, 35, 47, .7); }
.section-head { max-width: 70ch; margin-bottom: clamp(28px, 4vw, 46px); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: clamp(27px, 3.6vw, 42px); }
.section-head .sub { margin-top: 14px; color: var(--muted); font-size: clamp(15px, 1.4vw, 17.5px); }
.eyebrow {
  margin: 0 0 14px; color: var(--gold); font-size: 11.5px; font-weight: 700;
  letter-spacing: .17em; text-transform: uppercase;
  display: flex; align-items: center; gap: 10px;
}
.section-head.center .eyebrow { justify-content: center; }
.eyebrow::before {
  content: ""; width: 22px; height: 1px; flex: none;
  background: linear-gradient(90deg, transparent, var(--gold-3));
}
.section-head.center .eyebrow::before { display: none; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.tiny { font-size: 12.5px; }
.nowrap { white-space: nowrap; }
.center { text-align: center; }
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  padding: 10px 18px; border-radius: 0 0 10px 10px;
  background: var(--gold); color: #171103; font-weight: 700; font-size: 14px;
  transition: top .18s var(--ease);
}
.skip:focus { top: 0; color: #171103; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Scroll reveal ---------------------------------------------------------- */
.reveal { opacity: 1; transform: none; }
.motion-ready .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: var(--d, 0ms); }
.motion-ready .reveal.is-in { opacity: 1; transform: none; }

/* 4. buttons --------------------------------------------------------------- */
.btn {
  --btn-bg: transparent;
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 22px; border-radius: var(--radius-sm); border: 1px solid transparent;
  font: 600 15px/1.2 var(--font-body); letter-spacing: -.01em; cursor: pointer;
  transition: transform .16s var(--ease), box-shadow .2s var(--ease), border-color .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn svg { flex: none; }
.btn-sm { padding: 9px 15px; font-size: 13.5px; border-radius: var(--radius-xs); }
.btn-lg { padding: 16px 28px; font-size: 16px; border-radius: 14px; }
.btn-gold {
  background: linear-gradient(140deg, #f6dc90, var(--gold) 38%, var(--gold-2));
  color: #1a1305; box-shadow: var(--glow-gold), inset 0 1px 0 rgba(255, 255, 255, .45);
}
.btn-gold:hover { transform: translateY(-2px); color: #1a1305; box-shadow: 0 16px 40px -12px rgba(230, 193, 105, .75), inset 0 1px 0 rgba(255, 255, 255, .5); }
.btn-gold:active { transform: translateY(0); }
.btn-ghost { border-color: var(--line-2); background: rgba(255, 255, 255, .025); color: var(--text); }
.btn-ghost:hover { border-color: var(--gold-3); background: rgba(230, 193, 105, .08); color: var(--text); transform: translateY(-2px); }
.btn-quiet { border-color: var(--line); color: var(--muted); background: transparent; }
.btn-quiet:hover { color: var(--text); border-color: var(--line-2); background: rgba(255, 255, 255, .03); }
.btn-block { width: 100%; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.actions.center { justify-content: center; }
.link-more {
  display: inline-flex; align-items: center; gap: 7px; color: var(--gold);
  font-size: 14px; font-weight: 600; border-bottom: 1px solid rgba(230, 193, 105, .3);
  padding-bottom: 2px; transition: border-color .2s, gap .2s;
}
.link-more:hover { border-color: var(--gold); gap: 11px; color: var(--gold); }
.link-plain { color: var(--gold); border-bottom: 1px solid rgba(230, 193, 105, .3); }
.link-plain:hover { border-color: var(--gold); }

/* 5. header ---------------------------------------------------------------- */
.progress {
  position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 60; pointer-events: none;
  background: linear-gradient(90deg, var(--gold-2), var(--gold), #fff3cf);
  transform: scaleX(0); transform-origin: 0 50%; opacity: 0;
  transition: opacity .3s;
}
.progress.is-on { opacity: 1; }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 7, 12, .72);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s, box-shadow .25s;
}
.nav.is-stuck { background: rgba(7, 7, 12, .93); border-bottom-color: var(--line); box-shadow: 0 12px 34px -28px #000; }
.nav-in {
  display: flex; align-items: center; gap: 18px;
  height: var(--head-h); max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter);
}
.brand { display: flex; align-items: center; gap: 10px; font: 600 18px/1 var(--font-body); letter-spacing: -.01em; }
.brand img { width: 30px; height: 30px; border-radius: 9px; box-shadow: 0 4px 14px -6px rgba(230, 193, 105, .8); }
.brand:hover { color: var(--text); }
.brand .ver {
  margin-left: 2px; padding: 2px 7px; border-radius: 999px; border: 1px solid var(--line-2);
  color: var(--muted); font-size: 10.5px; font-weight: 600; letter-spacing: .04em;
}

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links > a, .menu-btn {
  position: relative; padding: 9px 13px; border-radius: 9px;
  color: var(--text-2); font-size: 14.5px; font-weight: 500; background: none; border: 0; cursor: pointer;
  font-family: inherit; display: inline-flex; align-items: center; gap: 6px;
  transition: color .18s, background .18s;
}
.nav-links > a:hover, .menu-btn:hover, .nav-links > a[aria-current="page"] { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav-links > a[aria-current="page"]::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--gold-2), var(--gold));
}
.menu-btn .caret { transition: transform .2s var(--ease); }
.has-menu:hover:not(.is-dismissed) .caret, .has-menu.is-open .caret { transform: rotate(180deg); }

.has-menu { position: static; }
.menu {
  position: absolute; left: 50%; top: calc(100% - 6px); z-index: 55;
  width: min(760px, calc(100vw - 24px)); padding: 14px;
  translate: -50% 8px; opacity: 0; visibility: hidden; pointer-events: none;
  background: rgba(14, 14, 21, .97); border: 1px solid var(--line-2); border-radius: var(--radius);
  box-shadow: var(--shadow-3);
  backdrop-filter: blur(18px);
  transition: opacity .18s var(--ease), translate .18s var(--ease), visibility .18s;
}
.has-menu:hover:not(.is-dismissed) .menu, .has-menu.is-open .menu {
  opacity: 1; visibility: visible; pointer-events: auto; translate: -50% 0;
}
.menu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.menu-item {
  display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start;
  padding: 11px 12px; border-radius: var(--radius-sm); border: 1px solid transparent;
  transition: background .18s, border-color .18s, transform .18s;
}
.menu-item:hover { background: rgba(230, 193, 105, .07); border-color: rgba(230, 193, 105, .22); transform: translateX(2px); color: var(--text); }
.menu-item .ico { margin-top: 1px; }
.menu-item b { display: block; font-size: 14.5px; font-weight: 600; }
.menu-item span { display: block; color: var(--muted); font-size: 12.8px; line-height: 1.45; margin-top: 2px; }
.menu-foot {
  display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; justify-content: space-between;
  margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}

.nav-tools { display: flex; align-items: center; gap: 10px; }
.icon-link {
  display: inline-grid; place-items: center; width: 36px; height: 36px; flex: none;
  border: 1px solid var(--line); border-radius: 50%; color: var(--muted);
  transition: color .18s, border-color .18s, background .18s, transform .18s;
}
.icon-link:hover { color: var(--text); border-color: var(--line-2); background: rgba(255, 255, 255, .04); transform: translateY(-1px); }
.lang { display: flex; padding: 2px; gap: 2px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, .02); }
.lang button {
  all: unset; cursor: pointer; padding: 5px 11px; border-radius: 999px;
  font: 600 11.5px/1 var(--font-body); letter-spacing: .06em; color: var(--muted);
  transition: background .18s, color .18s;
}
.lang button:hover { color: var(--text); }
.lang button[aria-pressed="true"] { background: linear-gradient(140deg, #f2d689, var(--gold-2)); color: #1a1305; }
.lang button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.burger { display: none; }

/* Mobile drawer */
.drawer {
  position: fixed; inset: 0; z-index: 70; display: none;
  background: rgba(4, 4, 8, .6); backdrop-filter: blur(4px);
  opacity: 0; transition: opacity .25s var(--ease);
}
.drawer.is-open { display: block; opacity: 1; }
.drawer-panel {
  position: absolute; inset: 0 0 0 auto; width: min(380px, 88vw); height: 100%;
  display: flex; flex-direction: column; gap: 4px; overflow-y: auto;
  padding: 18px 20px 28px; background: var(--bg-2); border-left: 1px solid var(--line);
  box-shadow: -30px 0 80px -40px #000;
  translate: 100% 0; transition: translate .3s var(--ease);
}
.drawer.is-open .drawer-panel { translate: 0 0; }
.drawer-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.drawer-close {
  all: unset; cursor: pointer; display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--line); border-radius: 50%; color: var(--muted);
}
.drawer-close:hover { color: var(--text); border-color: var(--line-2); }
.drawer a.dlink {
  display: flex; align-items: center; gap: 12px; padding: 13px 12px; border-radius: var(--radius-sm);
  color: var(--text-2); font-size: 15.5px; font-weight: 500; border: 1px solid transparent;
}
.drawer a.dlink:hover, .drawer a.dlink[aria-current="page"] { background: rgba(255, 255, 255, .045); color: var(--text); border-color: var(--line); }
.drawer a.dlink[aria-current="page"] { border-left: 2px solid var(--gold); }
.drawer .dgroup { margin: 14px 0 4px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; padding-left: 12px; }
.drawer .dsub { padding-left: 20px; }
.drawer .dsub a.dlink { font-size: 14.5px; padding: 10px 12px; color: var(--muted); }
.drawer-foot { margin-top: auto; padding-top: 18px; display: grid; gap: 10px; }

/* 6. hero ------------------------------------------------------------------ */
.hero { position: relative; padding-block: clamp(40px, 6vw, 78px) clamp(34px, 5vw, 62px); }
.hero-in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: clamp(28px, 5vw, 62px); align-items: center; }
.hero h1 { font-size: clamp(38px, 5.6vw, 68px); letter-spacing: -.025em; }
.hero .lead { margin: 20px 0 28px; color: var(--text-2); font-size: clamp(16px, 1.55vw, 19px); line-height: 1.62; max-width: 56ch; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 26px; list-style: none; color: var(--muted); font-size: 13.8px; }
.facts li { display: flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 10px var(--gold); flex: none; }

.hero-media { position: relative; margin: 0; }
.hero-media::before {
  content: ""; position: absolute; inset: -10% -8%; z-index: -1; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(139, 61, 255, .38), transparent 72%);
  filter: blur(10px);
}
.frame {
  display: block;
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line-2); background: #000;
  box-shadow: var(--shadow-3), 0 0 0 1px rgba(255, 255, 255, .03) inset;
}
.frame img, .frame video { width: 100%; height: auto; display: block; }
picture.frame { width: 100%; }
.frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), transparent 26%);
}
.frame-cap { margin-top: 12px; color: var(--muted); font-size: 13.5px; text-align: center; }
.frame-badge {
  position: absolute; z-index: 2; top: 12px; left: 12px; display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 11px; border-radius: 999px; font-size: 11.5px; font-weight: 600; letter-spacing: .04em;
  background: rgba(7, 7, 12, .78); border: 1px solid var(--line-2); color: var(--text-2);
  backdrop-filter: blur(8px);
}
.frame-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

/* Page hero (subpages) */
.pagehero { padding-block: clamp(34px, 5vw, 60px) clamp(26px, 4vw, 46px); }
.pagehero-in { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(26px, 4vw, 54px); align-items: center; }
.pagehero h1 { font-size: clamp(31px, 4.2vw, 50px); letter-spacing: -.02em; }
.pagehero .lead { margin: 16px 0 24px; color: var(--text-2); font-size: clamp(15.5px, 1.4vw, 17.5px); max-width: 58ch; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 13px; }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; list-style: none; margin: 0; padding: 0; }
.crumbs a:hover { color: var(--gold); }
.crumbs .sep { opacity: .5; }
.crumbs [aria-current="page"] { color: var(--text-2); }
.meta-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }

.chip, .pill {
  display: inline-flex; align-items: center; gap: 7px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, .03);
  color: var(--text-2); font-size: 12.8px; font-weight: 500; line-height: 1.4;
}
.chip.gold { border-color: rgba(230, 193, 105, .35); background: rgba(230, 193, 105, .09); color: #f4e2b4; }
.chip.violet { border-color: rgba(139, 61, 255, .35); background: rgba(139, 61, 255, .1); color: #d9c4ff; }
.chip.cyan { border-color: rgba(86, 216, 232, .3); background: rgba(86, 216, 232, .08); color: #bfeef5; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips.tight { gap: 6px; }

/* 7. stats ----------------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--line); }
.stat { padding: 22px 14px; text-align: center; background: linear-gradient(180deg, var(--bg-2), var(--surface)); transition: background .25s; }
.stat:hover { background: linear-gradient(180deg, #14141f, #101019); }
.stat b { display: block; font: 700 clamp(22px, 2.4vw, 31px)/1.1 var(--font-display); color: var(--gold); letter-spacing: -.01em; }
.stat span { display: block; margin-top: 6px; color: var(--muted); font-size: 12.6px; line-height: 1.35; }
.stats.four { grid-template-columns: repeat(4, 1fr); }

/* 8. cards & grids --------------------------------------------------------- */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 24px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019);
  transition: transform .22s var(--ease), border-color .22s, box-shadow .22s, background .22s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none; opacity: 0;
  background: radial-gradient(24rem 12rem at 20% 0%, rgba(230, 193, 105, .13), transparent 70%);
  transition: opacity .25s;
}
.card:hover { transform: translateY(-3px); border-color: rgba(230, 193, 105, .3); box-shadow: var(--shadow-2); }
.card:hover::before { opacity: 1; }
.card h3 { font-size: 16.5px; color: #f6e7bd; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--muted); font-size: 14.6px; line-height: 1.6; }
.card .ico { color: var(--gold); }
.card-more { margin-top: auto; padding-top: 6px; font-size: 13.5px; font-weight: 600; color: var(--gold); display: inline-flex; align-items: center; gap: 6px; }
.card-more .arw { transition: transform .2s var(--ease); }
.card:hover .card-more .arw { transform: translateX(4px); }
a.card:hover { color: inherit; }
.ico {
  display: inline-grid; place-items: center; width: 40px; height: 40px; flex: none;
  border-radius: 12px; color: var(--gold);
  background: linear-gradient(150deg, rgba(230, 193, 105, .18), rgba(230, 193, 105, .05));
  border: 1px solid rgba(230, 193, 105, .24);
}
.ico.sm { width: 34px; height: 34px; border-radius: 10px; }
.ico.violet { color: #c9a6ff; background: linear-gradient(150deg, rgba(139, 61, 255, .22), rgba(139, 61, 255, .06)); border-color: rgba(139, 61, 255, .3); }
.ico.cyan { color: #a5e9f2; background: linear-gradient(150deg, rgba(86, 216, 232, .2), rgba(86, 216, 232, .05)); border-color: rgba(86, 216, 232, .28); }

/* Split (copy + picture) */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(26px, 4.5vw, 60px); align-items: center; }
.split.flip .split-media { order: -1; }
.split-copy h2 { font-size: clamp(25px, 3.1vw, 38px); }
.split-copy > .eyebrow { margin-bottom: 12px; }
.split-copy .body { margin-top: 16px; color: var(--text-2); font-size: 15.8px; }
.split-copy .actions { margin-top: 22px; }
.ticks { list-style: none; display: grid; gap: 11px; margin-top: 20px; }
.ticks li { position: relative; padding-left: 28px; color: var(--text-2); font-size: 15.2px; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .42em; width: 16px; height: 16px; border-radius: 50%;
  background: rgba(230, 193, 105, .14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e6c169' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 10px no-repeat;
  border: 1px solid rgba(230, 193, 105, .3);
}
.ticks.notes li::before { content: "♪"; display: grid; place-items: center; font-size: 10px; color: var(--gold); background: rgba(230, 193, 105, .12); }
.split-media { position: relative; }
.split-media::before {
  content: ""; position: absolute; inset: -8% -6%; z-index: -1; border-radius: 40%;
  background: radial-gradient(closest-side, rgba(139, 61, 255, .26), transparent 72%);
}

/* Shot grid (gallery teasers) */
.shotgrid { display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.shotgrid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shot { margin: 0; }
.shot .frame { cursor: zoom-in; transition: transform .25s var(--ease), border-color .25s, box-shadow .25s; }
.shot:hover .frame { transform: translateY(-3px); border-color: rgba(230, 193, 105, .32); box-shadow: var(--shadow-2); }
.shot figcaption { margin-top: 10px; color: var(--muted); font-size: 13.5px; text-align: center; }

/* 9. steps ----------------------------------------------------------------- */
.steps { list-style: none; counter-reset: st; display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.steps.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.steps li {
  counter-increment: st; position: relative; display: grid; gap: 8px; align-content: start;
  padding: 24px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019);
}
.steps li::before {
  content: counter(st, decimal-leading-zero);
  font: 700 13px/1 var(--font-mono); letter-spacing: .06em; color: var(--gold);
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  background: rgba(230, 193, 105, .1); border: 1px solid rgba(230, 193, 105, .25); margin-bottom: 4px;
}
.steps b { font-size: 16px; }
.steps span, .steps p { color: var(--muted); font-size: 14.6px; }
.steps-num { list-style: none; counter-reset: sn; display: grid; gap: 14px; }
.steps-num li { counter-increment: sn; position: relative; padding-left: 42px; color: var(--text-2); font-size: 15.3px; }
.steps-num li::before {
  content: counter(sn); position: absolute; left: 0; top: 1px; width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; font: 700 13px/1 var(--font-body); color: var(--gold);
  background: rgba(230, 193, 105, .12); border: 1px solid rgba(230, 193, 105, .28);
}
.steps-num b { color: var(--text); }

/* 10. tables & code -------------------------------------------------------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); -webkit-overflow-scrolling: touch; }
table.data { width: 100%; border-collapse: collapse; font-size: 14.6px; }
table.data caption { caption-side: top; text-align: left; padding: 16px 18px 0; color: var(--muted); font-size: 13.5px; }
table.data th, table.data td { padding: 13px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
table.data thead th {
  position: sticky; top: 0; z-index: 1; background: #15151f; color: var(--gold);
  font-size: 11.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; white-space: nowrap;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: rgba(255, 255, 255, .022); }
table.data td b { color: var(--text); }
table.data td .muted { color: var(--muted); }
table.data .num { font-family: var(--font-mono); font-size: 13.4px; color: var(--text-2); white-space: nowrap; }
table.data a { color: var(--gold); border-bottom: 1px solid rgba(230, 193, 105, .3); }
table.data a:hover { border-color: var(--gold); }
.table-note { margin-top: 10px; color: var(--muted); font-size: 13px; }

dl.spec { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 34px; margin: 0; }
dl.spec > div { padding-bottom: 14px; border-bottom: 1px solid var(--line); }
dl.spec dt { color: var(--gold); font-size: 11.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
dl.spec dd { margin: 5px 0 0; color: var(--text-2); font-size: 15px; }

pre.code {
  margin: 0; padding: 18px 20px; overflow-x: auto; border-radius: var(--radius-sm);
  background: #0a0a11; border: 1px solid var(--line); color: #d9d8e4;
  font: 400 13.4px/1.7 var(--font-mono); tab-size: 2;
}
pre.code .c { color: #6f6f82; }
pre.code .g { color: var(--gold); }
.code-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; border: 1px solid var(--line); border-bottom: 0; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: #12121b; color: var(--muted); font: 600 12px/1 var(--font-mono); letter-spacing: .04em;
}
.code-head + pre.code { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.copy-btn {
  all: unset; cursor: pointer; padding: 5px 10px; border-radius: 7px; border: 1px solid var(--line-2);
  color: var(--muted); font: 600 11.5px/1 var(--font-body); transition: color .18s, border-color .18s;
}
.copy-btn:hover { color: var(--gold); border-color: rgba(230, 193, 105, .4); }

/* 11. callouts & faq ------------------------------------------------------- */
.callout {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; align-items: start;
  padding: 18px 20px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019); color: var(--text-2); font-size: 15px;
}
.callout .ico { width: 34px; height: 34px; border-radius: 10px; }
.callout b { color: var(--text); }
.callout.warn { border-color: rgba(255, 107, 139, .28); background: linear-gradient(180deg, rgba(255, 107, 139, .07), rgba(255, 107, 139, .02)); }
.callout.warn .ico { color: #ffb3c2; background: rgba(255, 107, 139, .14); border-color: rgba(255, 107, 139, .3); }
.callout.tip { border-color: rgba(86, 216, 232, .26); background: linear-gradient(180deg, rgba(86, 216, 232, .07), rgba(86, 216, 232, .02)); }
.callout.tip .ico { color: #a5e9f2; background: rgba(86, 216, 232, .13); border-color: rgba(86, 216, 232, .28); }
.callout.gold { border-color: rgba(230, 193, 105, .3); background: linear-gradient(180deg, rgba(230, 193, 105, .08), rgba(230, 193, 105, .02)); }
.callout p:last-child { margin-bottom: 0; }

.faq { display: grid; gap: 10px; }
details.qa {
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface);
  transition: border-color .2s, background .2s;
}
details.qa[open] { border-color: rgba(230, 193, 105, .3); background: linear-gradient(180deg, var(--card), #101019); }
details.qa summary {
  display: flex; align-items: center; gap: 14px; cursor: pointer; list-style: none;
  padding: 16px 18px; font-weight: 600; font-size: 15.4px; color: var(--text);
}
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after {
  content: ""; margin-left: auto; flex: none; width: 20px; height: 20px; border-radius: 50%;
  border: 1px solid var(--line-2);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e6c169' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") center / 13px no-repeat;
  transition: transform .22s var(--ease), border-color .2s;
}
details.qa[open] summary::after { transform: rotate(180deg); border-color: rgba(230, 193, 105, .5); }
details.qa .a { padding: 0 18px 18px; color: var(--muted); font-size: 14.8px; }
details.qa .a p { margin-bottom: .7em; }
details.qa .a a { color: var(--gold); border-bottom: 1px solid rgba(230, 193, 105, .3); }

/* 12. carousel & lightbox -------------------------------------------------- */
.carousel { position: relative; }
.track {
  display: flex; list-style: none; overflow-x: auto; scroll-snap-type: x mandatory;
  scrollbar-width: none; border-radius: var(--radius);
}
.track::-webkit-scrollbar { display: none; }
.track:focus-visible { outline: 2px solid var(--gold); outline-offset: 5px; }
.slide { flex: 0 0 100%; scroll-snap-align: center; }
.slide figure { margin: 0; }
.slide .frame { cursor: pointer; }
.slide figcaption { margin-top: 12px; text-align: center; color: var(--muted); font-size: 14px; }
.car-btn {
  position: absolute; top: calc(50% - 46px); z-index: 3; width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center; cursor: pointer; padding: 0; color: var(--text);
  background: rgba(9, 9, 14, .74); border: 1px solid var(--line-2); backdrop-filter: blur(9px);
  transition: border-color .18s, background .18s, transform .18s;
}
.car-btn:hover { border-color: var(--gold); background: rgba(9, 9, 14, .94); transform: scale(1.06); }
.car-btn.prev { left: 14px; }
.car-btn.next { right: 14px; }
.dots { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.dots button {
  width: 8px; height: 8px; padding: 0; border: 0; border-radius: 50%; cursor: pointer;
  background: #3a3a4a; transition: background .18s, transform .18s, width .18s;
}
.dots button[aria-pressed="true"] { background: var(--gold); width: 22px; border-radius: 999px; }

.lightbox { position: fixed; inset: 0; z-index: 90; display: none; padding: clamp(12px, 4vw, 44px); background: rgba(3, 3, 6, .93); backdrop-filter: blur(8px); }
.lightbox.is-open { display: grid; place-items: center; }
.lb-figure { margin: 0; max-width: min(1180px, 100%); max-height: 100%; display: grid; gap: 12px; justify-items: center; }
.lb-figure img { max-height: calc(100vh - 190px); width: auto; max-width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line-2); box-shadow: var(--shadow-3); }
.lb-cap { color: var(--text-2); font-size: 14.5px; text-align: center; max-width: 70ch; }
.lb-count { color: var(--muted); font-size: 12.5px; font-family: var(--font-mono); }
.lb-btn {
  position: absolute; display: grid; place-items: center; cursor: pointer; color: var(--text);
  background: rgba(20, 20, 28, .8); border: 1px solid var(--line-2); border-radius: 50%;
  width: 46px; height: 46px; transition: border-color .18s, background .18s;
}
.lb-btn:hover { border-color: var(--gold); background: rgba(28, 28, 38, .95); }
.lb-close { top: 18px; right: 18px; }
.lb-prev { left: clamp(8px, 2vw, 26px); top: 50%; translate: 0 -50%; }
.lb-next { right: clamp(8px, 2vw, 26px); top: 50%; translate: 0 -50%; }

/* 13. download cards ------------------------------------------------------- */
.dl-hero { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 18px; align-items: stretch; }
.dl-card {
  position: relative; overflow: hidden; padding: clamp(22px, 3vw, 32px);
  border-radius: var(--radius); border: 1px solid rgba(230, 193, 105, .3);
  background:
    radial-gradient(40rem 18rem at 12% -10%, rgba(230, 193, 105, .16), transparent 70%),
    linear-gradient(180deg, var(--card), #0e0e16);
  box-shadow: var(--shadow-2);
}
.dl-card h2 { font-size: clamp(23px, 2.7vw, 32px); }
.dl-card .file { margin-top: 6px; font: 600 13.5px/1.5 var(--font-mono); color: var(--gold); word-break: break-all; }
.dl-side { display: grid; gap: 18px; align-content: start; }
.dl-mini {
  padding: 18px 20px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019); display: grid; gap: 6px;
}
.dl-mini b { font-size: 15px; }
.dl-mini span { color: var(--muted); font-size: 13.6px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 7px;
  background: rgba(255, 255, 255, .045); border: 1px solid var(--line); color: var(--muted);
  font: 600 11.5px/1.4 var(--font-mono); letter-spacing: .02em;
}
.tag-rec {
  position: absolute; top: 16px; right: 16px; padding: 5px 11px; border-radius: 999px;
  background: linear-gradient(140deg, #f6dc90, var(--gold-2)); color: #1a1305;
  font: 700 11px/1.4 var(--font-body); letter-spacing: .08em; text-transform: uppercase;
}

/* Dock map / group cards */
.groups { display: grid; gap: 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.group {
  padding: 22px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019);
}
.group > h3 {
  display: flex; align-items: center; gap: 10px; font: 700 12px/1 var(--font-body);
  letter-spacing: .14em; text-transform: uppercase; color: var(--gold); margin-bottom: 14px;
}
.group ul { list-style: none; display: grid; gap: 10px; }
.group li { display: grid; grid-template-columns: minmax(96px, auto) minmax(0, 1fr); gap: 12px; font-size: 14.4px; }
.group li b { color: var(--text); font-weight: 600; }
.group li span { color: var(--muted); }

/* Page footer nav (prev / next) */
.pagenav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.pagenav a {
  display: grid; gap: 4px; padding: 18px 20px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), #101019); transition: border-color .2s, transform .2s;
}
.pagenav a:hover { border-color: rgba(230, 193, 105, .32); transform: translateY(-2px); color: inherit; }
.pagenav .dir { color: var(--muted); font-size: 11.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.pagenav .ttl { font-size: 16px; font-weight: 600; color: var(--text); }
.pagenav a.next { text-align: right; }

/* CTA band */
.cta {
  position: relative; overflow: hidden; text-align: center;
  padding-block: clamp(52px, 7vw, 92px); border-top: 1px solid var(--line);
  background:
    radial-gradient(60% 130% at 50% 0%, rgba(230, 193, 105, .13), transparent 70%),
    radial-gradient(50% 120% at 12% 100%, rgba(139, 61, 255, .14), transparent 70%);
}
.cta h2 { font-size: clamp(28px, 4vw, 46px); }
.cta .sub { margin: 16px auto 28px; max-width: 62ch; color: var(--text-2); font-size: clamp(15px, 1.4vw, 17px); }
.cta .keys {
  position: absolute; inset: auto 0 -30px 0; height: 90px; opacity: .16; pointer-events: none;
  background: repeating-linear-gradient(90deg, #fff 0 16px, transparent 16px 34px);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000);
  mask-image: linear-gradient(180deg, transparent, #000);
}

/* 14. footer --------------------------------------------------------------- */
.foot { border-top: 1px solid var(--line); background: linear-gradient(180deg, rgba(12, 12, 19, .6), rgba(7, 7, 12, .9)); }
.foot-in { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 34px; padding-block: clamp(38px, 5vw, 58px) 30px; }
.foot-brand p { margin: 14px 0 18px; color: var(--muted); font-size: 14.2px; max-width: 34ch; }
.foot h4 { margin-bottom: 14px; color: var(--gold); font: 700 11.5px/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase; }
.foot ul { list-style: none; display: grid; gap: 9px; }
.foot ul a { color: var(--muted); font-size: 14.2px; transition: color .18s, padding-left .18s; }
.foot ul a:hover { color: var(--text); padding-left: 3px; }
.foot-bottom {
  display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center; justify-content: space-between;
  padding-block: 18px 26px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px;
}
.social { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
.social a { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13.4px; }
.social a:hover { color: var(--text); }

/* Back to top */
.totop {
  position: fixed; right: 18px; bottom: 18px; z-index: 45; width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; cursor: pointer; color: var(--text);
  background: rgba(16, 16, 25, .9); border: 1px solid var(--line-2); backdrop-filter: blur(8px);
  box-shadow: var(--shadow-2); opacity: 0; visibility: hidden; translate: 0 8px;
  transition: opacity .25s, translate .25s, visibility .25s, border-color .2s;
}
.totop.is-on { opacity: 1; visibility: visible; translate: 0 0; }
.totop:hover { border-color: var(--gold); color: var(--gold); }

/* 404 */
.err { display: grid; place-items: center; text-align: center; padding-block: clamp(70px, 14vw, 150px); gap: 8px; }
.err .code { font: 700 clamp(70px, 16vw, 150px)/1 var(--font-display); color: transparent; background: linear-gradient(160deg, #f7dd94, var(--gold-2) 45%, #6d5320); -webkit-background-clip: text; background-clip: text; }
.err h1 { font-size: clamp(24px, 3.4vw, 38px); margin-top: 6px; }
.err p { color: var(--muted); max-width: 52ch; margin: 8px auto 24px; }

/* 15. responsive & motion -------------------------------------------------- */
@media (max-width: 1080px) {
  .grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .foot-in { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; }
}

@media (max-width: 940px) {
  .nav-links, .nav-tools .icon-link { display: none; }
  .burger {
    all: unset; cursor: pointer; display: grid; place-items: center; width: 40px; height: 40px; margin-left: auto;
    border: 1px solid var(--line); border-radius: 11px; color: var(--text-2);
  }
  .burger:hover { border-color: var(--line-2); color: var(--text); }
  .nav-tools { margin-left: 0; }
  .hero-in, .pagehero-in, .split, .dl-hero, .groups { grid-template-columns: minmax(0, 1fr); }
  .hero-media { order: 1; }
  .split.flip .split-media { order: -1; }
  .split-media { max-width: 620px; }
  .grid, .grid.two, .grid.four, .steps, .steps.two, .steps.four, .shotgrid, .shotgrid.two, .pagenav { grid-template-columns: minmax(0, 1fr); }
  .stats, .stats.four { grid-template-columns: repeat(2, 1fr); }
  dl.spec { grid-template-columns: minmax(0, 1fr); }
  .car-btn { width: 40px; height: 40px; top: calc(50% - 40px); }
  .car-btn.prev { left: 8px; }
  .car-btn.next { right: 8px; }
  .pagenav a.next { text-align: left; }
  .menu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  :root { --head-h: 60px; }
  .brand .ver { display: none; }
  .nav-tools > .btn { display: none; }
  .btn { padding: 12px 18px; font-size: 14.5px; }
  .actions .btn { flex: 1 1 auto; }
  .stats, .stats.four { grid-template-columns: repeat(2, 1fr); }
  .foot-in { grid-template-columns: minmax(0, 1fr); }
  .totop { right: 12px; bottom: 12px; }
  .lb-prev, .lb-next { width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal, .motion-ready .reveal { opacity: 1; transform: none; }
}

/* Anti-flash: while the Vietnamese strings have not been applied yet, keep the
   English text out of sight (layout stays put, so nothing shifts).  site.js
   removes the attribute as soon as it swaps the strings; a timer in <head>
   removes it anyway if scripting fails. */
html[data-lang-pref="vi"] [data-i18n],
html[data-lang-pref="vi"] [data-i18n-html] { visibility: hidden; }

@media print {
  .nav, .drawer, .totop, .progress, .cta .keys, .car-btn, .dots { display: none !important; }
  body { background: #fff; color: #000; }
  body::before, body::after { display: none; }
  a { color: #000; text-decoration: underline; }
}