/* VIZEN website — same look as the app: deep dark surfaces, red accent, quiet glow, rounded cards. */
:root {
  --bg: #07090f;
  --bg-2: #0b0e16;
  --surface: #11141d;
  --surface-2: #161a25;
  --line: #222838;
  --line-soft: #1a1f2c;
  --text: #f3f5fa;
  --text-2: #aab2c3;
  --text-3: #6f788c;
  --accent: #ff354e;
  --accent-2: #ff5268;
  --accent-soft: rgba(255, 53, 78, .12);
  --ok: #3ddc84;
  --radius: 22px;
  --max: 1200px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Inter", Roboto, sans-serif;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif; line-height: 1.1; margin: 0; letter-spacing: -.02em; }
p { margin: 0; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.mono { font-family: "Cascadia Mono", "Cascadia Code", Consolas, ui-monospace, monospace; }
.overline { font: 600 12px/1 "Cascadia Mono", Consolas, monospace; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 99; background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 10px; }

/* background: faint grid + accent light from the top */
.backdrop { position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1100px 520px at 50% -140px, rgba(255, 53, 78, .16), transparent 70%),
    linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px) 0 0 / 56px 56px,
    var(--bg);
  mask-image: linear-gradient(#000 0, #000 55%, transparent 100%);
}

/* ---------- header ---------- */
.nav { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(14px); background: rgba(7, 9, 15, .72); border-bottom: 1px solid var(--line-soft); }
.nav .wrap { display: flex; align-items: center; height: 68px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; }
.badge { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 0 22px rgba(255, 53, 78, .35); }
.badge img { width: 22px; }
.wordmark { height: 15px; width: auto; color: var(--text); }
.nav-links { display: flex; gap: 22px; margin-left: 12px; }
.nav-links a { color: var(--text-2); font-size: 15px; }
.nav-links a:hover { color: var(--text); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.lang button { all: unset; cursor: pointer; padding: 4px 11px; border-radius: 999px; font-size: 13px; color: var(--text-3); }
.lang button[aria-pressed="true"] { background: var(--surface-2); color: var(--text); }
.lang button:focus-visible { outline: 2px solid var(--accent); }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 48px; padding: 0 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px; border: 1px solid transparent; transition: transform .15s ease, background .15s ease, border-color .15s ease; white-space: nowrap; }
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-primary { background: var(--text); color: #0a0d14; }
.btn-primary:hover { background: #fff; }
.btn-accent { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 10px 30px rgba(255, 53, 78, .25); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255, 255, 255, .02); }
.btn-ghost:hover { border-color: #39405a; }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn svg { width: 18px; height: 18px; }
.store-badge img { height: 52px; width: auto; }

/* ---------- hero ---------- */
.hero { padding: 96px 0 40px; text-align: center; }
.pill { display: inline-flex; align-items: center; gap: 10px; padding: 7px 14px 7px 8px; border: 1px solid var(--line); border-radius: 999px; background: rgba(17, 20, 29, .7);
  color: var(--text-2); font-size: 14px; }
.pill b { white-space: nowrap; background: var(--accent-soft); color: var(--accent-2); padding: 2px 10px; border-radius: 999px; font-weight: 600; font-size: 12px; }
.hero h1 { font-size: clamp(44px, 7.2vw, 88px); margin: 26px auto 22px; max-width: 980px; font-weight: 650; }
.hero h1 .grad { background: linear-gradient(90deg, #fff 0%, #ffd0d6 45%, var(--accent-2) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: clamp(17px, 2vw, 20px); color: var(--text-2); max-width: 720px; margin: 0 auto; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; align-items: center; }
.meta { margin-top: 18px; color: var(--text-3); font-size: 14px; }
.meta span + span::before { content: "·"; margin: 0 10px; }
.shot-hero { margin: 64px auto 0; max-width: 1120px; position: relative; }
.shot-hero::before { content: ""; position: absolute; inset: -40px 10% auto; height: 220px; background: radial-gradient(closest-side, rgba(255, 53, 78, .28), transparent); filter: blur(30px); z-index: -1; }
.frame { border-radius: 18px; border: 1px solid var(--line); overflow: hidden; background: var(--surface); box-shadow: 0 40px 120px rgba(0, 0, 0, .55); }

/* ---------- sections ---------- */
section { padding: 110px 0; }
.head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.head h2 { font-size: clamp(32px, 4.4vw, 52px); margin: 14px 0 16px; font-weight: 650; }
.head p { color: var(--text-2); font-size: 18px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: linear-gradient(180deg, var(--surface), var(--bg-2)); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 28px; position: relative; overflow: hidden; }
.card:hover { border-color: var(--line); }
.card .ico { width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent-2); margin-bottom: 18px; }
.card .ico svg { width: 22px; height: 22px; }
.card h3 { font-size: 20px; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 15px; }
.card .num { position: absolute; right: 22px; top: 20px; color: var(--text-3); font-size: 12px; }

/* feature rows with screenshots */
.rows { display: grid; gap: 28px; }
.row { display: grid; grid-template-columns: 1fr 1.35fr; gap: 48px; align-items: center; background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: 28px; padding: 40px; }
.row:nth-child(even) { grid-template-columns: 1.35fr 1fr; }
.row:nth-child(even) .txt { order: 2; }
.row h3 { font-size: 30px; margin: 12px 0 14px; }
.row p { color: var(--text-2); }
.row ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.row li { padding-left: 26px; position: relative; color: var(--text-2); font-size: 15px; }
.row li::before { content: ""; position: absolute; left: 0; top: 9px; width: 10px; height: 10px; border-radius: 3px; background: var(--accent); box-shadow: 0 0 12px rgba(255, 53, 78, .6); }
.row .frame { border-radius: 14px; box-shadow: 0 24px 70px rgba(0, 0, 0, .5); }

/* gallery */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 26px; }
.tabs button { all: unset; cursor: pointer; padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px; color: var(--text-2); font-size: 14px; }
.tabs button[aria-selected="true"] { background: var(--text); color: #0a0d14; border-color: var(--text); }
.tabs button:focus-visible { outline: 2px solid var(--accent); }
.gallery .frame { max-width: 1080px; margin: 0 auto; }
.gallery figcaption { text-align: center; color: var(--text-3); margin-top: 14px; font-size: 14px; }

/* safety */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.check { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.check li { display: flex; gap: 12px; color: var(--text-2); }
.check li::before { content: "✓"; flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: rgba(61, 220, 132, .12); color: var(--ok); font-size: 13px; font-weight: 700; }
.check.no li::before { content: "✕"; background: var(--accent-soft); color: var(--accent-2); }

/* download */
.dl { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; }
.dl .card { display: flex; flex-direction: column; gap: 14px; }
.dl .card .spacer { flex: 1; }
.tag { display: inline-flex; align-self: flex-start; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; background: rgba(61, 220, 132, .12); color: var(--ok); }
.tag.soon { background: rgba(255, 179, 71, .12); color: #ffb347; }
.small { font-size: 13px; color: var(--text-3); }
.small code { font-size: 12px; word-break: break-all; }

/* system requirements */
.req { margin-top: 16px; background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 28px; }
.req h3 { font-size: 20px; margin-bottom: 16px; }
.req-scroll { overflow-x: auto; }
.req table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
.req th, .req td { text-align: left; padding: 12px 14px; border-top: 1px solid var(--line-soft); vertical-align: top; }
.req thead th { border-top: 0; color: var(--text-3); font: 600 12px/1 "Cascadia Mono", Consolas, monospace; letter-spacing: .12em; text-transform: uppercase; }
.req tbody th { color: var(--text); font-weight: 600; width: 22%; }
.req td { color: var(--text-2); }
.req .small { margin-top: 14px; }

/* open source band */
.band { border: 1px solid var(--line); border-radius: 28px; padding: 56px; text-align: center; background:
  radial-gradient(600px 240px at 50% 0, rgba(255, 53, 78, .14), transparent 70%), var(--bg-2); }
.band h2 { font-size: clamp(30px, 4vw, 46px); margin: 12px 0 14px; }
.band p { color: var(--text-2); max-width: 680px; margin: 0 auto 28px; }

/* faq */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: 10px; }
.faq details { background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: 16px; padding: 18px 22px; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--text-3); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--text-2); margin-top: 12px; }

/* footer */
footer { border-top: 1px solid var(--line-soft); padding: 48px 0 60px; color: var(--text-3); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a:hover { color: var(--text); }

/* simple text pages (privacy) */
.doc { max-width: 820px; margin: 0 auto; padding: 80px 24px 100px; }
.doc h1 { font-size: clamp(34px, 5vw, 52px); margin-bottom: 10px; }
.doc h2 { font-size: 24px; margin: 40px 0 12px; }
.doc p, .doc li { color: var(--text-2); }
.doc p + p { margin-top: 12px; }
.doc a { color: var(--accent-2); }
.doc code { background: var(--surface-2); padding: 1px 6px; border-radius: 6px; font-size: 14px; }

/* help and changelog pages */
.doc .overline { display: inline-block; margin-bottom: 12px; }
.doc ol, .doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc figure { margin: 24px 0 0; }
.doc details { background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: 14px; padding: 14px 18px; margin: 10px 0; }
.doc summary { cursor: pointer; font-weight: 600; color: var(--text); }
.doc details[open] summary { margin-bottom: 8px; }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 10px; }
.toc a { color: var(--text-2) !important; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 14px; }
.toc a:hover { color: var(--text) !important; border-color: #39405a; }
kbd { font: 600 13px "Cascadia Mono", Consolas, monospace; background: var(--surface-2); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 7px; padding: 2px 7px; color: var(--text); white-space: nowrap; }
table.keys { width: 100%; border-collapse: collapse; margin-top: 8px; }
table.keys td { padding: 10px 12px; border-top: 1px solid var(--line-soft); color: var(--text-2); }
table.keys td:first-child { width: 190px; }
.release { background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 24px 28px; margin-top: 18px; }
.release.next { border-color: rgba(255, 179, 71, .25); }
.release header { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 8px; }
.release .ver { font: 650 26px "Segoe UI Variable Display", "Segoe UI", sans-serif; color: var(--text); }
.release .date { color: var(--text-3); font-size: 14px; }
.nav-links a[aria-current="page"] { color: var(--text); }

/* language visibility */
[data-lang-only] { display: none; }
html[lang="en"] [data-lang-only="en"], html[lang="ro"] [data-lang-only="ro"] { display: revert; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } .btn:hover { transform: none; } }

@media (max-width: 980px) {
  .grid, .dl { grid-template-columns: 1fr 1fr; }
  .row, .row:nth-child(even) { grid-template-columns: 1fr; padding: 28px; gap: 28px; }
  .row:nth-child(even) .txt { order: 0; }
  .split { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .grid, .dl { grid-template-columns: 1fr; }
  section { padding: 72px 0; }
  .hero { padding-top: 64px; }
  .band { padding: 36px 20px; }
  .nav .btn { display: none; }
}