/* =========================================================================
   DocuSwiftPrime — marketing site styles
   One brand-token layer, a light + dark theme, and a small set of
   composable components. No framework; ships as a single stylesheet.
   ========================================================================= */

:root {
  --brand-1: #5b4bff;
  --brand-2: #1a9bfc;
  --brand-ink: #2f33c4;
  --accent: #4146e8;

  --bg: #ffffff;
  --bg-soft: #f5f6fb;
  --bg-sunken: #eef0f7;
  --surface: #ffffff;
  --card: #ffffff;
  --text: #171a2b;
  --text-2: #4a5169;
  --text-3: #636a80;
  --line: #e5e8f0;
  --line-strong: #d3d8e6;

  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(18, 22, 45, .06), 0 1px 3px rgba(18, 22, 45, .08);
  --shadow: 0 10px 30px rgba(20, 24, 54, .10), 0 2px 8px rgba(20, 24, 54, .06);
  --shadow-lg: 0 30px 70px rgba(20, 24, 54, .22), 0 10px 24px rgba(20, 24, 54, .12);
  --ring: 0 0 0 4px rgba(65, 70, 232, .18);

  --gradient: linear-gradient(135deg, var(--brand-1) 0%, #3d5dfb 48%, var(--brand-2) 100%);
  --container: 1160px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

:root:not([data-theme="light"]) {
  @media (prefers-color-scheme: dark) {
    --bg: #0e1020;
    --bg-soft: #141730;
    --bg-sunken: #0a0c18;
    --surface: #171a33;
    --card: #181b36;
    --text: #eef0fb;
    --text-2: #b4bad4;
    --text-3: #868db0;
    --line: #272b4b;
    --line-strong: #353a60;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow: 0 10px 30px rgba(0, 0, 0, .45);
    --shadow-lg: 0 30px 70px rgba(0, 0, 0, .6);
  }
}
:root[data-theme="dark"] {
  --bg: #0e1020;
  --bg-soft: #141730;
  --bg-sunken: #0a0c18;
  --surface: #171a33;
  --card: #181b36;
  --text: #eef0fb;
  --text-2: #b4bad4;
  --text-3: #868db0;
  --line: #272b4b;
  --line-strong: #353a60;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 10px 30px rgba(0, 0, 0, .45);
  --shadow-lg: 0 30px 70px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { line-height: 1.12; letter-spacing: -.02em; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.28rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
/* Links inside running text are underlined so they don't rely on colour alone. */
main :is(p, li, td, .callout) a:not(.btn) { text-decoration: underline; text-underline-offset: 2px; }
img, svg { max-width: 100%; }
ul { margin: 0 0 1rem; padding-left: 1.2em; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
.section { padding: clamp(56px, 9vw, 112px) 0; }
.section--tight { padding: clamp(40px, 6vw, 72px) 0; }
.center { text-align: center; }
.muted { color: var(--text-2); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent);
}
.lead { font-size: clamp(1.05rem, 2vw, 1.28rem); color: var(--text-2); max-width: 62ch; }
.center .lead { margin-inline: auto; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 200;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 8px;
  transition: top .15s;
}
.skip-link:focus { top: 12px; }

/* ----------------------------- icons ----------------------------- */
.ic { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round; vertical-align: -.18em; flex: none; }

/* ----------------------------- buttons ----------------------------- */
.btn {
  --btn-bg: var(--surface); --btn-fg: var(--text); --btn-bd: var(--line-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 13px 22px; border-radius: 12px; border: 1px solid var(--btn-bd);
  background: var(--btn-bg); color: var(--btn-fg);
  font: inherit; font-weight: 600; font-size: 1rem; line-height: 1;
  cursor: pointer; white-space: nowrap; transition: transform .08s, box-shadow .15s, background .15s, border-color .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn .ic { width: 1.2em; height: 1.2em; }
.btn--primary {
  --btn-bg: var(--gradient); --btn-fg: #fff; --btn-bd: transparent;
  box-shadow: 0 8px 20px rgba(65, 70, 232, .32);
}
.btn--primary:hover { box-shadow: 0 12px 28px rgba(65, 70, 232, .42); }
.btn--ghost { --btn-bg: transparent; }
.btn--lg { padding: 17px 30px; font-size: 1.08rem; border-radius: 14px; }
.btn--block { width: 100%; }
.btn small { font-weight: 500; opacity: .85; font-size: .8rem; }
.btn-note { margin-top: 12px; font-size: .9rem; color: var(--text-3); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }
.center .btn-row { justify-content: center; }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg-soft); color: var(--text-2);
  font-size: .86rem; font-weight: 600;
}
.chip .ic { width: 1.1em; height: 1.1em; color: var(--accent); }
.chip--win { color: var(--text); }

/* ----------------------------- header ----------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, background .2s;
}
.site-header.is-stuck { border-bottom-color: var(--line); }
.site-header__inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 700; font-size: 1.12rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand b { font-weight: 800; }
.brand span { color: var(--text-3); font-weight: 600; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a:not(.btn) {
  color: var(--text-2); font-weight: 600; font-size: .98rem;
  padding: 9px 14px; border-radius: 9px;
}
.nav a:not(.btn):hover { color: var(--text); background: var(--bg-soft); text-decoration: none; }
.nav__cta { margin-left: 8px; }
.theme-toggle {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border-radius: 10px; border: 1px solid var(--line); background: var(--surface);
  color: var(--text-2); cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav { position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 2px; padding: 16px 20px 24px; background: var(--bg); border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow); transform: translateY(-120%); transition: transform .24s ease;
    margin-left: 0; }
  .nav.is-open { transform: translateY(0); }
  .nav a:not(.btn) { padding: 13px 10px; }
  .nav__cta { margin: 10px 0 0; }
  .nav-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-left: auto;
    border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); cursor: pointer; }
  .theme-toggle { order: -1; }
}

/* ----------------------------- hero ----------------------------- */
.hero { position: relative; overflow: hidden; padding: clamp(48px, 7vw, 92px) 0 0; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto; height: 620px; z-index: -1;
  background:
    radial-gradient(60% 60% at 20% 10%, rgba(91, 75, 255, .20), transparent 60%),
    radial-gradient(50% 50% at 85% 0%, rgba(26, 155, 252, .18), transparent 60%);
  filter: blur(6px);
}
.hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 4vw, 56px); align-items: center; }
.hero__title { margin-bottom: 18px; }
.hero__title .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__badges { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 26px; }
.hero__cta { margin-top: 8px; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 18px 26px; margin-top: 30px; color: var(--text-3); font-size: .92rem; }
.hero__trust span { display: inline-flex; align-items: center; gap: 8px; }
.hero__trust .ic { color: var(--accent); }

.window {
  position: relative; border-radius: 16px; overflow: hidden;
  background: var(--card); box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
}
.window img { display: block; width: 100%; height: auto; }
.window--float { transform: perspective(1600px) rotateY(-7deg) rotateX(2deg); transform-origin: left center; }
.hero__shot { position: relative; }
.hero__shot::after {
  content: ""; position: absolute; inset: auto -8% -14% 8%; height: 60px; z-index: -1;
  background: radial-gradient(60% 100% at 50% 0%, rgba(65, 70, 232, .4), transparent 70%); filter: blur(22px);
}

@media (max-width: 920px) {
  .hero__grid { grid-template-columns: 1fr; }
  .window--float { transform: none; }
  .hero__shot { margin-top: 10px; }
}

/* ----------------------------- logos / stats strip ----------------------------- */
.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 10px; }
.stat b { display: block; font-size: 1.9rem; font-weight: 800; letter-spacing: -.02em;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--text-2); font-size: .92rem; }
@media (max-width: 620px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ----------------------------- feature grid ----------------------------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .grid--3, .grid--2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm); transition: transform .14s, box-shadow .14s, border-color .14s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.card__icon {
  display: inline-grid; place-items: center; width: 50px; height: 50px; margin-bottom: 16px;
  border-radius: 13px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent);
}
.card__icon .ic { width: 26px; height: 26px; stroke-width: 1.7; }
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; color: var(--text-2); font-size: .98rem; }

/* ----------------------------- alternating showcase ----------------------------- */
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.showcase + .showcase { margin-top: clamp(48px, 7vw, 96px); }
.showcase--flip .showcase__media { order: 2; }
.showcase__list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 14px; }
.showcase__list li { display: flex; gap: 12px; align-items: flex-start; color: var(--text-2); }
.showcase__list .ic { color: var(--accent); margin-top: 3px; }
.showcase__list b { color: var(--text); font-weight: 700; }
@media (max-width: 860px) {
  .showcase { grid-template-columns: 1fr; }
  .showcase--flip .showcase__media { order: 0; }
}

/* ----------------------------- download band ----------------------------- */
.download-band { position: relative; overflow: hidden; color: #fff; background: var(--gradient); }
.download-band::after {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(40% 80% at 80% 10%, rgba(255, 255, 255, .22), transparent 60%);
}
.download-band .container { position: relative; z-index: 1; }
.download-band h2 { color: #fff; }
.download-band p { color: rgba(255, 255, 255, .9); }
.download-band .btn--primary { --btn-bg: #fff; --btn-fg: var(--brand-ink); box-shadow: 0 12px 30px rgba(0, 0, 0, .25); }
.download-band .chip { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .25); color: #fff; }
.download-band .chip .ic { color: #fff; }

/* download page card */
.dl-card {
  max-width: 560px; margin: 0 auto; text-align: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 44px); box-shadow: var(--shadow);
}
.dl-card__logo { width: 72px; height: 72px; border-radius: 18px; box-shadow: var(--shadow-sm); }
.dl-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 18px; margin: 18px 0 24px; color: var(--text-3); font-size: .9rem; }
.dl-meta span { display: inline-flex; align-items: center; gap: 7px; }
.dl-meta .ic { color: var(--accent); }
.hash {
  margin-top: 18px; padding: 12px 14px; border: 1px dashed var(--line-strong); border-radius: 10px;
  background: var(--bg-soft); font-size: .82rem; color: var(--text-2);
  font-family: "Cascadia Mono", Consolas, ui-monospace, monospace; word-break: break-all;
}
.os-note {
  margin-top: 16px; padding: 12px 16px; border-radius: 10px; font-size: .92rem;
  background: color-mix(in srgb, var(--accent) 8%, transparent); color: var(--text-2);
  display: none;
}
.os-note.is-shown { display: block; }

/* steps */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.steps li { position: relative; padding-left: 56px; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: -2px; width: 38px; height: 38px;
  display: grid; place-items: center; border-radius: 11px;
  background: var(--gradient); color: #fff; font-weight: 700;
}
.steps b { display: block; margin-bottom: 2px; }

/* ----------------------------- FAQ ----------------------------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--card);
  padding: 4px 20px; margin-bottom: 12px;
}
.faq details[open] { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 0; font-weight: 600; font-size: 1.05rem;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .ic { color: var(--text-3); transition: transform .2s; }
.faq details[open] summary .ic { transform: rotate(180deg); }
.faq p { margin: 0 0 16px; color: var(--text-2); }

/* ----------------------------- content pages ----------------------------- */
.page-head { padding: clamp(40px, 6vw, 72px) 0 clamp(20px, 3vw, 32px); border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose ul { padding-left: 1.3em; }
.prose li { margin-bottom: .4em; color: var(--text-2); }
.prose code { background: var(--bg-soft); padding: 2px 6px; border-radius: 6px; font-size: .9em; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: .96rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { color: var(--text-3); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
.callout {
  display: flex; gap: 14px; padding: 16px 18px; border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 8%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--text-2); margin: 1.4em 0;
}
.callout .ic { color: var(--accent); flex: none; margin-top: 2px; }

/* ----------------------------- footer ----------------------------- */
.site-footer { background: var(--bg-sunken); border-top: 1px solid var(--line); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer-grid h2 { font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); margin-bottom: 14px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer-grid a { color: var(--text-2); font-size: .96rem; }
.footer-grid a:hover { color: var(--text); }
.footer-about { max-width: 34ch; color: var(--text-2); font-size: .96rem; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center;
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--text-3); font-size: .9rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-about { grid-column: 1 / -1; } }
@media (max-width: 460px) { .footer-grid { grid-template-columns: 1fr; } }

/* reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }