/* =========================================================================
   VINHAN PRO — 3D landing page
   Aesthetic: cinematic "video lab" — deep black, ember-orange, glass, grain.
   ========================================================================= */

:root {
  --orange:      #FF7A1A;
  --orange-2:    #FF9B45;
  --orange-deep: #E5681A;
  --glow:        rgba(255, 122, 26, 0.45);
  --glow-soft:   rgba(255, 122, 26, 0.12);

  --bg:    #07070a;
  --bg-2:  #0b0b10;
  --bg-3:  #101017;
  --panel: rgba(255, 255, 255, 0.028);
  --panel-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text:  #f4f4f6;
  --muted: #a2a2ad;
  --dim:   #909099;

  --font-display: "Clash Display", "Satoshi", system-ui, sans-serif;
  --font-body:    "Satoshi", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Arabic / RTL typography swap */
html[dir="rtl"] {
  --font-display: "IBM Plex Sans Arabic", "Clash Display", sans-serif;
  --font-body:    "IBM Plex Sans Arabic", "Satoshi", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* base atmospheric gradient under everything */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -3;
  background:
    radial-gradient(1100px 700px at 75% -8%, rgba(255,122,26,0.16), transparent 60%),
    radial-gradient(900px 600px at 8% 18%, rgba(255,122,26,0.06), transparent 55%),
    linear-gradient(180deg, #07070a 0%, #08080c 40%, #060609 100%);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::selection { background: var(--orange); color: #100600; }

/* keyboard focus — high-contrast, theme-matched (not shown on mouse clicks) */
:focus-visible { outline: 2px solid var(--orange-2); outline-offset: 3px; }
.btn:focus-visible, .lang-toggle:focus-visible, .scroll-cue:focus-visible,
.socials a:focus-visible, .nav-toggle:focus-visible { outline-offset: 2px; }

/* ---------- WebGL canvas + texture overlays ---------- */
#bg-canvas {
  position: fixed; inset: 0; z-index: -2;
  width: 100%; height: 100vh;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.2s var(--ease);
}
#bg-canvas.ready { opacity: 1; }

.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.scanlines {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: 0.35;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0) 0px, rgba(0,0,0,0) 2px, rgba(0,0,0,0.18) 3px, rgba(0,0,0,0) 4px);
  mix-blend-mode: multiply;
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 820px; }
.skip-link {
  position: absolute; inset-inline-start: -999px; top: 8px; z-index: 200;
  background: var(--orange); color: #100600; padding: 10px 16px; border-radius: 8px; font-weight: 700;
}
.skip-link:focus { inset-inline-start: 12px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-body); font-weight: 700; letter-spacing: -0.01em;
  border-radius: 999px; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.3s var(--ease), background 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn .ico { width: 20px; height: 20px; }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-primary {
  background: linear-gradient(180deg, var(--orange-2), var(--orange));
  color: #160800;
  box-shadow: 0 8px 30px -8px var(--glow), inset 0 1px 0 rgba(255,255,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,0.45); }
.btn-ghost {
  background: var(--panel); color: var(--text); border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--orange); color: #fff; }

/* ---------- NAV ---------- */
.nav {
  position: fixed; top: 0; inset-inline: 0; z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7,7,10,0.72);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; position: relative; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #fff; }
.brand-mark { width: 30px; height: 30px; color: #fff; }
.brand-mark .mark-frame { transition: stroke 0.3s; }
.brand-word {
  font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: 0.04em;
}
.brand-pro {
  color: var(--orange); margin-inline-start: 5px;
  -webkit-text-stroke: 0;
}
.nav-links { display: flex; gap: 26px; margin-inline-start: auto; }
.nav-links a {
  font-size: 14.5px; color: var(--muted); font-weight: 500; position: relative; padding: 4px 0;
  transition: color 0.2s;
}
.nav-links a::after {
  content: ""; position: absolute; bottom: 0; inset-inline-start: 0; width: 0; height: 2px;
  background: var(--orange); transition: width 0.3s var(--ease);
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500; letter-spacing: 0.06em;
  background: transparent; color: var(--muted); border: 1px solid var(--border-strong);
  padding: 8px 13px; border-radius: 999px; cursor: pointer; transition: all 0.2s;
}
.lang-toggle:hover { color: #fff; border-color: var(--orange); }
.nav-toggle {
  display: none; width: 38px; height: 38px; border: 1px solid var(--border-strong); border-radius: 10px;
  background: transparent; cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--muted); transition: transform 0.25s var(--ease), opacity 0.2s; }
.nav.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 120px 0 80px; text-align: center;
}
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--orange-2); margin-bottom: 26px;
  padding: 7px 16px; border: 1px solid var(--glow-soft); border-radius: 999px;
  background: var(--glow-soft);
}
html[dir="rtl"] .eyebrow { letter-spacing: 0.12em; }

.hero-title { margin: 0 0 22px; }
.ht-line {
  font-family: "Clash Display", var(--font-display);
  font-weight: 700; line-height: 0.92;
  font-size: clamp(64px, 13vw, 178px);
  letter-spacing: -0.03em;
  display: inline-flex; align-items: baseline; flex-wrap: wrap; justify-content: center; gap: 0.06em;
}
.ht-vin {
  background: linear-gradient(180deg, #ffffff 30%, #c9c9d2 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.ht-pro {
  color: transparent; -webkit-text-stroke: 2px var(--orange);
  text-shadow: 0 0 50px var(--glow);
}
.hero-sub {
  font-size: clamp(17px, 2.4vw, 23px); color: #fff; font-weight: 500; margin-bottom: 16px;
}
.hero-lede {
  max-width: 620px; color: var(--muted); font-size: 16.5px; margin-bottom: 34px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; margin-bottom: 20px; }
.hero-free {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--dim); letter-spacing: 0.04em; margin-bottom: 56px;
}

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  width: 100%; max-width: 760px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; backdrop-filter: blur(6px);
}
.hero-stats li {
  background: rgba(10,10,14,0.6); padding: 22px 14px; display: flex; flex-direction: column; gap: 4px;
}
.hero-stats .stat-v { font-family: var(--font-display); font-size: clamp(22px, 3vw, 30px); font-weight: 600; color: var(--orange-2); }
.hero-stats .stat-l { font-size: 12.5px; color: var(--muted); }

.hero-fade {
  position: absolute; inset-inline: 0; bottom: 0; height: 180px; pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg));
}
.scroll-cue {
  position: absolute; bottom: 26px; inset-inline-start: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--border-strong); border-radius: 14px;
  background: transparent; cursor: pointer; display: grid; place-items: start center; padding-top: 7px;
}
.scroll-cue span { width: 4px; height: 8px; border-radius: 2px; background: var(--orange); animation: cue 1.6s var(--ease) infinite; }
@keyframes cue { 0%{opacity:0;transform:translateY(0)} 30%{opacity:1} 80%{opacity:0;transform:translateY(12px)} 100%{opacity:0} }

/* ---------- TRUST ---------- */
.trust { padding: 46px 0; border-block: 1px solid var(--border); background: rgba(0,0,0,0.25); }
.trust-title { text-align: center; font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); font-family: var(--font-mono); margin-bottom: 22px; }
html[dir="rtl"] .trust-title { text-transform: none; letter-spacing: 0.04em; }
.trust-row { display: flex; flex-wrap: wrap; gap: 14px 38px; justify-content: center; align-items: center; }
.trust-row li { font-family: var(--font-mono); font-size: 15px; color: var(--muted); font-weight: 500; transition: color 0.2s; }
.trust-row li:hover { color: var(--orange-2); }

/* ---------- SECTIONS ---------- */
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(255,255,255,0.012), transparent), var(--bg-2); border-block: 1px solid var(--border); }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.sec-head-left { text-align: start; margin-inline: 0; margin-bottom: 34px; }
.kicker {
  display: inline-block; font-family: var(--font-mono); font-size: 13px; color: var(--orange);
  letter-spacing: 0.2em; margin-bottom: 16px; padding: 4px 12px; border: 1px solid var(--glow-soft); border-radius: 8px;
}
.sec-head h2 {
  font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em;
  font-size: clamp(30px, 4.4vw, 50px); line-height: 1.05; margin-bottom: 16px;
  background: linear-gradient(180deg, #fff, #cfcfd8); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.sec-head p { color: var(--muted); font-size: 17px; }

/* ---------- FEATURES ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.feature-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: transform 0.35s var(--ease), border-color 0.35s, background 0.35s;
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.35s;
  background: radial-gradient(420px 160px at var(--mx,50%) 0%, var(--glow-soft), transparent 70%);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--panel-2); }
.feature-card:hover::before { opacity: 1; }
.feat-ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(180deg, rgba(255,122,26,0.18), rgba(255,122,26,0.05));
  border: 1px solid var(--glow-soft); color: var(--orange-2);
}
.feat-ico svg { width: 23px; height: 23px; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; font-family: var(--font-display); letter-spacing: -0.01em; }
.feature-card p { color: var(--muted); font-size: 14.5px; line-height: 1.55; }

/* ---------- MODELS ---------- */
.models-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.models-h {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.1em; color: var(--orange-2);
  text-transform: uppercase; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
html[dir="rtl"] .models-h { text-transform: none; letter-spacing: 0; }
.model-list { display: flex; flex-direction: column; gap: 10px; }
.model-row {
  display: grid; grid-template-columns: 1fr auto; gap: 6px 14px; align-items: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 18px; transition: border-color 0.25s, transform 0.25s;
}
.model-row:hover { border-color: var(--orange); transform: translateY(-2px); }
.model-name { font-family: var(--font-mono); font-size: 14.5px; color: #fff; font-weight: 500; }
.model-tag { font-size: 11px; font-family: var(--font-mono); color: var(--orange-2); border: 1px solid var(--glow-soft); padding: 2px 8px; border-radius: 999px; justify-self: end; }
.model-use { grid-column: 1 / -1; color: var(--muted); font-size: 13.5px; }
.model-scale { grid-column: 1 / -1; font-family: var(--font-mono); font-size: 12px; color: var(--dim); }

/* ---------- WORKFLOW ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 28px; position: relative; transition: border-color 0.3s, transform 0.3s;
}
.step:hover { border-color: var(--border-strong); transform: translateY(-4px); }
.step-n {
  font-family: var(--font-display); font-size: 52px; font-weight: 600; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px var(--orange); opacity: 0.8; margin-bottom: 18px;
}
.step h3 { font-size: 21px; font-family: var(--font-display); margin-bottom: 10px; }
.step p { color: var(--muted); font-size: 15px; }

/* ---------- PRESETS ---------- */
.preset-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 40px; }
.preset-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 28px; position: relative; overflow: hidden; transition: transform 0.3s, border-color 0.3s;
}
.preset-card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.preset-card.featured { border-color: var(--orange); background: linear-gradient(180deg, var(--glow-soft), var(--panel)); }
.preset-card .pc-glow { position: absolute; inset: 0; background: radial-gradient(300px 120px at 50% -10%, var(--glow-soft), transparent); pointer-events: none; }
.preset-badge { position: absolute; inset-inline-end: 16px; top: 16px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.1em; color: var(--orange); border: 1px solid var(--glow-soft); padding: 3px 9px; border-radius: 999px; }
.preset-card h3 { font-size: 24px; font-family: var(--font-display); margin-bottom: 8px; }
.preset-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 18px; }
.preset-time { font-family: var(--font-mono); font-size: 13px; color: var(--orange-2); }
.styles-block { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; justify-content: center; }
.styles-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em; color: var(--dim); text-transform: uppercase; }
.style-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.style-chip {
  position: relative; padding: 13px 22px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel); cursor: default; transition: all 0.25s;
}
.style-chip:hover { border-color: var(--orange); }
.style-chip strong { display: block; font-size: 15px; font-family: var(--font-display); }
.style-chip span { font-size: 12.5px; color: var(--muted); }

/* ---------- ENCODERS ---------- */
.enc-auto {
  text-align: center; font-family: var(--font-mono); font-size: 14px; color: var(--orange-2);
  border: 1px dashed rgba(255,122,26,0.35); border-radius: 999px; padding: 12px 28px;
  width: max-content; max-width: 100%; margin: 0 auto 34px; background: var(--glow-soft);
}
.enc-groups { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.enc-group { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.enc-group h4 { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.08em; color: var(--orange-2); margin-bottom: 16px; }
.enc-group ul { display: flex; flex-direction: column; gap: 9px; }
.enc-group li { font-family: var(--font-mono); font-size: 13.5px; color: var(--muted); display: flex; align-items: center; gap: 9px; }
.enc-group li::before { content: ""; width: 6px; height: 6px; border-radius: 2px; background: var(--orange); flex: none; }

/* ---------- FORMATS / STRETCH ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.fmt-block { margin-bottom: 22px; }
.fmt-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; color: var(--dim); text-transform: uppercase; display: block; margin-bottom: 12px; }
html[dir="rtl"] .styles-label, html[dir="rtl"] .fmt-label { text-transform: none; letter-spacing: 0.02em; }
.fmt-chips, .stretch-presets { display: flex; gap: 10px; flex-wrap: wrap; }
.fmt-chip {
  font-family: var(--font-mono); font-size: 14px; color: #fff; padding: 10px 16px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--panel); transition: all 0.25s;
}
.fmt-chip:hover { border-color: var(--orange); color: var(--orange-2); transform: translateY(-2px); }
.stretch-presets { flex-direction: column; }
.stretch-row {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 20px; transition: border-color 0.25s;
}
.stretch-row:hover { border-color: var(--orange); }
.stretch-row .sr-label { font-weight: 600; }
.stretch-row .sr-factor { font-family: var(--font-mono); color: var(--orange-2); font-size: 14px; }

/* ---------- PERFORMANCE ---------- */
.perf-rows { display: flex; flex-direction: column; gap: 12px; max-width: 900px; margin: 0 auto; }
.perf-row {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 20px 24px; transition: border-color 0.25s, background 0.25s;
}
.perf-row:hover { border-color: var(--border-strong); background: var(--panel-2); }
.perf-label { font-family: var(--font-mono); font-size: 14px; color: var(--muted); }
.perf-value { font-family: var(--font-display); font-size: clamp(16px, 2.2vw, 22px); color: var(--orange-2); font-weight: 600; white-space: nowrap; }

/* ---------- OPEN SOURCE ---------- */
.stack-chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stack-chip {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px;
  border: 1px solid var(--border); border-radius: 12px; background: var(--panel); transition: all 0.25s;
}
.stack-chip:hover { border-color: var(--orange); transform: translateY(-3px); }
.stack-chip .sc-name { font-family: var(--font-mono); font-weight: 500; color: #fff; }
.stack-chip .sc-lic { font-size: 11.5px; color: var(--dim); font-family: var(--font-mono); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--panel); overflow: hidden; transition: border-color 0.25s; }
.faq-item[open] { border-color: var(--border-strong); }
.faq-q {
  list-style: none; cursor: pointer; padding: 20px 22px; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-weight: 600; font-size: 16.5px; font-family: var(--font-display);
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q .chev { width: 20px; height: 20px; flex: none; color: var(--orange); transition: transform 0.3s var(--ease); }
.faq-item[open] .faq-q .chev { transform: rotate(180deg); }
.faq-a { padding: 0 22px 22px; color: var(--muted); font-size: 15px; line-height: 1.65; }

/* ---------- SYSTEM ---------- */
.sys-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.sys-cell { background: var(--bg-2); padding: 22px 24px; }
.sys-cell dt { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--dim); text-transform: uppercase; margin-bottom: 6px; }
html[dir="rtl"] .sys-cell dt { text-transform: none; letter-spacing: 0; }
.sys-cell dd { font-size: 15.5px; color: var(--text); font-weight: 500; }

/* ---------- FINAL CTA ---------- */
.final-cta { padding: 130px 0; text-align: center; position: relative; overflow: hidden; }
.final-cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(700px 360px at 50% 30%, var(--glow-soft), transparent 70%); pointer-events: none; }
.final-inner { position: relative; display: flex; flex-direction: column; align-items: center; }
.final-mark { width: 64px; height: 64px; margin-bottom: 26px; filter: drop-shadow(0 0 30px var(--glow)); }
.final-cta h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(30px, 5vw, 56px); line-height: 1.04; margin-bottom: 16px; letter-spacing: -0.02em; max-width: 760px; }
.final-sub { color: var(--muted); font-size: 17px; max-width: 560px; margin-bottom: 32px; }
.final-meta { font-family: var(--font-mono); font-size: 13px; color: var(--dim); margin-top: 22px; letter-spacing: 0.04em; }

/* ---------- FOOTER ---------- */
.footer { border-top: 1px solid var(--border); padding: 64px 0 48px; background: var(--bg-2); }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-brand { max-width: 360px; }
.footer-brand .brand-word { font-family: var(--font-display); font-size: 22px; font-weight: 700; letter-spacing: 0.04em; }
.footer-tagline { color: var(--muted); font-size: 14.5px; margin: 14px 0 20px; }
.socials { display: flex; gap: 12px; flex-wrap: wrap; }
.socials a {
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); display: grid; place-items: center;
  color: var(--muted); transition: all 0.25s;
}
.socials a:hover { border-color: var(--orange); color: var(--orange-2); transform: translateY(-3px); }
.socials svg { width: 18px; height: 18px; }
.footer-meta { text-align: end; align-self: flex-end; }
.footer-rights { font-size: 13.5px; color: var(--muted); }
.footer-made { font-size: 13px; color: var(--dim); margin-top: 6px; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.feature-card, .step, .preset-card, .model-row, .perf-row, .enc-group, .stack-chip, .faq-item, .fmt-chip, .stretch-row, .sys-cell {
  opacity: 0; transform: translateY(20px); transition: opacity 0.55s var(--ease), transform 0.55s var(--ease), border-color 0.25s, background 0.25s;
}
.in-stagger { opacity: 1 !important; transform: none !important; }

/* =========================================================================
   PREMIUM LAYER — luxury upgrade: champagne-gold accents, refined hero
   wordmark, shimmer CTA, animated borders, intro reveal, gold scrollbar.
   ========================================================================= */
:root {
  --gold:      #E9C893;
  --gold-2:    #F6E3BC;
  --gold-deep: #C9A567;
  --lux:       linear-gradient(105deg, var(--orange) 0%, #FFAE54 42%, var(--gold) 100%);
  --lux-soft:  linear-gradient(105deg, rgba(255,122,26,0.18), rgba(233,200,147,0.16));
  --hair:      linear-gradient(90deg, transparent, rgba(233,200,147,0.5), transparent);
}

/* gold scrollbar */
html { scrollbar-color: var(--orange-deep) transparent; scrollbar-width: thin; }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: #050507; }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--orange), var(--gold-deep)); border-radius: 99px; border: 3px solid #050507; }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(var(--orange-2), var(--gold)); }

/* nav + footer brand: LifeYoi · Video Enhancer lockup */
.brand-pro { display: none; }
.brand-word { display: inline-flex; align-items: baseline; }
.brand-sub {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; margin-inline-start: 9px; padding-inline-start: 9px; position: relative;
}
.brand-sub::before { content: ""; position: absolute; inset-inline-start: 0; top: 12%; height: 76%; width: 1px; background: rgba(233,200,147,0.4); }
html[dir="rtl"] .brand-sub { letter-spacing: 0.03em; text-transform: none; }
.footer-brand .brand-sub { font-size: 12px; }
@media (max-width: 520px) { .brand-sub { display: none; } }

/* hero premium wordmark */
.hero-title { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.ht-house {
  font-family: var(--font-display); font-weight: 500; text-transform: uppercase;
  font-size: clamp(19px, 3.2vw, 32px); letter-spacing: 0.38em; text-indent: 0.38em;
  background: var(--lux); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 16px rgba(233,200,147,0.22));
}
html[dir="rtl"] .ht-house { letter-spacing: 0.22em; }
.ht-line {
  font-family: "Clash Display", var(--font-display); font-weight: 700; line-height: 0.9;
  font-size: clamp(44px, 10.2vw, 138px); letter-spacing: -0.03em;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0 0.22em;
}
.ht-word { background: linear-gradient(180deg, #ffffff 25%, #c4c4cf 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.ht-accent { background: var(--lux); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(0 6px 42px var(--glow)); }
.hero-title::after { content: ""; width: clamp(110px, 20vw, 260px); height: 2px; margin-top: 18px; background: var(--hair); }

/* eyebrow + kicker tinted gold */
.eyebrow { border-color: rgba(233,200,147,0.28); background: linear-gradient(var(--glow-soft), rgba(233,200,147,0.06)); color: var(--gold-2); }
.kicker { color: var(--gold-2); border-color: rgba(233,200,147,0.3); background: linear-gradient(rgba(255,122,26,0.06), rgba(233,200,147,0.05)); }

/* primary button: gold-orange gradient + shimmer sweep */
.btn-primary {
  background: var(--lux); color: #1a0c00; overflow: hidden; position: relative;
  box-shadow: 0 10px 34px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,0.3);
}
.btn-primary::after {
  content: ""; position: absolute; top: 0; inset-inline-start: -140%; width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-18deg); transition: inset-inline-start 0.7s var(--ease);
}
.btn-primary:hover::after { inset-inline-start: 150%; }

/* section + final headings: warm white→gold gradient */
.sec-head h2, .final-cta h2 {
  background: linear-gradient(180deg, #ffffff 0%, #f1ddbf 72%, var(--gold) 135%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* card depth: inset highlight + gold hover edges */
.feature-card, .step, .preset-card, .model-row, .enc-group, .perf-row, .stack-chip, .faq-item, .sys-cell, .stretch-row, .hero-stats {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}
.feature-card:hover, .step:hover, .enc-group:hover, .stack-chip:hover { border-color: rgba(233,200,147,0.45); }
.feat-ico { background: var(--lux-soft); border-color: rgba(233,200,147,0.3); color: var(--gold-2); }

/* hero stat numbers + final mark in gold */
.hero-stats .stat-v { background: var(--lux); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.final-mark { filter: drop-shadow(0 0 34px var(--glow)) drop-shadow(0 0 64px rgba(233,200,147,0.22)); }

/* featured preset: animated gold gradient border */
.preset-card.featured { border-color: transparent; background: linear-gradient(180deg, rgba(233,200,147,0.06), var(--panel)); }
.preset-card.featured::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(130deg, var(--orange), var(--gold), var(--orange-deep), var(--gold-2));
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: luxborder 6s linear infinite;
}
@keyframes luxborder { to { background-position: 300% 0; } }

/* INTRO reveal — hidden by default; JS adds .show on first visit (motion allowed) */
.intro {
  display: none; position: fixed; inset: 0; z-index: 9999; place-items: center;
  background: radial-gradient(62% 62% at 50% 44%, #0c0c12, #050507 76%);
  opacity: 1; transition: opacity 0.7s var(--ease);
}
.intro.show { display: grid; }
.intro.done { opacity: 0; pointer-events: none; }
.intro-stage { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.intro-mark { width: clamp(76px, 12vw, 112px); filter: drop-shadow(0 0 32px var(--glow)); animation: introMark 1.5s var(--ease) both; }
.intro-word {
  font-family: var(--font-display); font-weight: 600; text-transform: uppercase;
  font-size: clamp(15px, 2.4vw, 22px); letter-spacing: 0.4em; text-indent: 0.4em;
  background: var(--lux); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  opacity: 0; animation: introWord 0.9s var(--ease) 0.5s both;
}
@keyframes introMark { 0% { opacity: 0; transform: scale(0.72) translateY(8px); } 55% { opacity: 1; } 100% { opacity: 1; transform: none; } }
@keyframes introWord { 0% { opacity: 0; letter-spacing: 0.72em; text-indent: 0.72em; } 100% { opacity: 0.95; letter-spacing: 0.4em; text-indent: 0.4em; } }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; inset-inline: 0; top: 68px; flex-direction: column; gap: 0; margin: 0;
    background: rgba(7,7,10,0.97); backdrop-filter: blur(16px) saturate(140%);
    border-bottom: 1px solid var(--border); padding: 8px 24px 16px;
    max-height: 0; overflow: hidden; opacity: 0; pointer-events: none;
    transition: max-height 0.3s var(--ease), opacity 0.25s var(--ease);
  }
  .nav.menu-open .nav-links { max-height: 380px; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 0; font-size: 16px; border-bottom: 1px solid var(--border); }
  .nav-links a::after { display: none; }
  .models-cols, .two-col, .sys-grid { grid-template-columns: 1fr; }
  .enc-groups { grid-template-columns: 1fr 1fr; }
  .steps, .preset-grid { grid-template-columns: 1fr; }
  .two-col { gap: 56px; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .hero { padding: 110px 0 60px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .enc-groups { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: start; }
  .btn-lg { padding: 14px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.05ms !important; }
  .reveal, .feature-card, .step, .preset-card, .model-row, .perf-row, .enc-group, .stack-chip, .faq-item, .fmt-chip, .stretch-row, .sys-cell { opacity: 1; transform: none; }
}