/*
  LinkNest website — one stylesheet for all pages.

  Deliberately plain CSS with no build step: the site is three static pages on
  GitHub Pages, and anything that needs compiling would be a dependency the
  site does not otherwise have.

  The palette follows the app's own mark: a near-black ink on a near-white
  ground, with a single indigo accent. Dark mode is honoured through
  prefers-color-scheme so the page matches the reader's system rather than
  forcing a look.
*/

:root {
  --ink: #17151c;
  --ink-soft: #4a4657;
  --ground: #fbfafd;
  --surface: #ffffff;
  --line: #e5e2ec;
  --accent: #4b3f9e;
  --accent-ink: #ffffff;
  --radius: 14px;
  --measure: 68ch;
  --shell: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ece7f2;
    --ink-soft: #b0a9bd;
    --ground: #101014;
    --surface: #17171d;
    --line: #2b2933;
    --accent: #a99cf5;
    --accent-ink: #16121f;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Noto Sans Arabic", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 20px;
}

/* Visible only to keyboard users, and only once focused.

   Hidden by clipping rather than by parking it off-screen at a negative
   offset: in a right-to-left document the off-screen trick extends the
   scrollable area in the inline-start direction, which gives the whole page a
   phantom horizontal scrollbar. Clipping is direction-agnostic and leaves the
   link fully focusable. */
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 0 0 var(--radius) 0;
  z-index: 10;
}

.skip-link:focus {
  width: auto;
  height: auto;
  padding: 10px 16px;
  overflow: visible;
  clip-path: none;
  inset-block-start: 0;
  inset-inline-start: 0;
}

a {
  color: var(--accent);
}

a:focus-visible,
.button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.site-header .shell {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 650;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: block;
}

.site-nav {
  display: flex;
  gap: 22px;
  font-size: 0.98rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
}

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

.hero {
  text-align: center;
  padding-block: clamp(48px, 9vw, 92px);
}

.hero img {
  width: clamp(88px, 16vw, 116px);
  height: auto;
  border-radius: 24px;
  margin-bottom: 26px;
}

.hero h1 {
  font-size: clamp(2.1rem, 6vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin: 0 0 14px;
}

/* Sits between the app's name and the fuller description: the h1 is the name
   alone, so this carries the one-line statement of what the name refers to. */
.tagline {
  font-size: clamp(1.12rem, 2.8vw, 1.35rem);
  font-weight: 550;
  color: var(--ink);
  max-width: 46ch;
  margin: 0 auto 18px;
  line-height: 1.35;
}

.lede {
  font-size: clamp(1.06rem, 2.4vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 auto;
}

.platforms {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 0;
  margin: 30px 0 0;
}

.platforms li {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 7px 17px;
  font-size: 0.93rem;
  color: var(--ink-soft);
}

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

section {
  padding-block: clamp(38px, 6vw, 62px);
  border-top: 1px solid var(--line);
}

h2 {
  font-size: clamp(1.4rem, 3.4vw, 1.85rem);
  letter-spacing: -0.018em;
  margin: 0 0 8px;
}

.section-lede {
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0 0 30px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.features li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.features h3 {
  margin: 0 0 6px;
  font-size: 1.06rem;
}

.features p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.privacy-points {
  max-width: var(--measure);
  padding-left: 1.15em;
  color: var(--ink-soft);
}

.privacy-points li + li {
  margin-top: 8px;
}

.button {
  display: inline-block;
  margin-top: 22px;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 999px;
}

.button:hover {
  filter: brightness(1.08);
}

/* ---------- Google data disclosure ---------- */

/* A definition list rather than prose: Google's reviewers scan for specific
   answers (why, when, what scope, what it cannot reach), and a term/definition
   pair puts each answer under a heading they can find at a glance. */
.disclosure {
  margin: 0;
  max-width: var(--measure);
}

.disclosure dt {
  font-weight: 650;
  color: var(--ink);
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.disclosure dt:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.disclosure dd {
  margin: 6px 0 0;
  color: var(--ink-soft);
}

/* The scope string must stay intact and readable, including on a narrow
   phone, so it wraps at any character rather than forcing the page wider. */
.scope {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 8px;
  margin: 4px 0;
  font-size: 0.9em;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-all;
  max-width: 100%;
  direction: ltr;
  unicode-bidi: isolate;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding-block: 34px;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.site-footer p {
  margin: 0 0 6px;
}

.site-footer a {
  color: var(--accent);
}

/* ---------- Policy pages ---------- */

.policy {
  padding-block: clamp(34px, 6vw, 56px);
}

.policy .shell {
  max-width: calc(var(--measure) + 40px);
}

.policy h1 {
  font-size: clamp(1.75rem, 4.6vw, 2.3rem);
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.policy h2 {
  margin-top: 2em;
  padding-top: 0.4em;
  border-top: 1px solid var(--line);
}

.policy h3 {
  margin-top: 1.6em;
  font-size: 1.08rem;
}

.policy hr {
  display: none; /* the h2 rules already separate sections */
}

.policy code {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.92em;
  /* Latin identifiers such as drive.file must stay LTR inside Arabic prose. */
  direction: ltr;
  unicode-bidi: isolate;
  display: inline-block;
}

.policy .meta {
  color: var(--ink-soft);
  font-size: 0.96rem;
  margin-bottom: 2em;
}

.policy ul {
  padding-left: 1.15em;
}

.policy li + li {
  margin-top: 6px;
}

.lang-switch {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 0.95rem;
}

/* Right-to-left pages: mirror list indentation, which is the one thing the
   logical properties above do not already handle. */
[dir="rtl"] .policy ul,
[dir="rtl"] .privacy-points {
  padding-left: 0;
  padding-right: 1.15em;
}

@media (max-width: 560px) {
  .site-header .shell {
    justify-content: center;
  }

  .site-nav {
    gap: 18px;
  }
}