/* IROMUSIC — secondary-page stylesheet (about, faq, help, tos, dmca, privacy).
 *
 * The two homepages (/en/, /fa/) carry their own inline design-system block;
 * this file is the same system, extracted, for the long-form pages that hang
 * off them. Token names and values are copied from those pages verbatim so
 * the two halves of the site cannot drift apart in look.
 *
 * Plain CSS, no build step, no imports from a CDN: gstatic and Google Fonts
 * are blocked in the primary market, so every face here is self-hosted out
 * of assets/fonts/.
 */

/* ── fonts ──────────────────────────────────────────────────────────────── */
/* One file per subset serves every weight — the same two Google Fonts cuts
   the homepages ship. font-display: swap keeps text painting immediately. */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/assets/fonts/inter-latin-ext.woff2") format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/assets/fonts/inter-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Vazirmatn';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/Vazirmatn-Regular.woff2") format('woff2');
}
@font-face {
  font-family: 'Vazirmatn';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/Vazirmatn-Medium.woff2") format('woff2');
}

/* ── tokens ─────────────────────────────────────────────────────────────── */
:root {
  --color-bg: #0a0a0d;
  --color-surface: #15161a;
  --color-text: #e9e9ed;
  --color-divider: color-mix(in srgb, #e9e9ed 16%, transparent);

  --color-neutral-100: #f3f5fe;
  --color-neutral-300: #cfd3e5;
  --color-neutral-400: #b2b6ca;
  --color-neutral-500: #9397ab;
  --color-neutral-800: #3f424d;

  --color-accent: #ae02cc;
  --color-accent-200: #f8e0fd;
  --color-accent-300: #f0c4fa;
  --color-accent-400: #e197f3;
  --color-accent-600: #ae02cc;
  --color-accent-900: #3d0c48;

  --font-heading: "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --radius-md: 8px;
  --wrap: 820px;
}

/* The Persian pages set lang="fa"; Vazirmatn leads there, Inter everywhere
   else. One rule rather than a per-element override. */
:root:lang(fa),
[lang="fa"] {
  --font-heading: "Vazirmatn", "Inter", system-ui, sans-serif;
  --font-body: "Vazirmatn", "Inter", system-ui, sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--color-accent-400); text-decoration: none; text-underline-offset: 3px; }
a:hover { color: var(--color-accent-300); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent-400); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 40%, transparent); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 40px);
}

/* position: fixed, not absolute: an absolutely positioned element parked at
   left:-9999px adds 10,000px of scrollable overflow on an RTL page (where
   leftward overflow IS scrollable), which gave every Persian page a stray
   horizontal scrollbar into empty space. A fixed element contributes no
   scrollable overflow at all. */
.skip-link {
  position: fixed;
  left: -9999px;
  top: 8px;
  z-index: 60;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 14px;
}
.skip-link:focus { left: 16px; }

/* ── header ─────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: clamp(10px, 2vw, 14px);
  max-width: none;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.12em;
}
.logo:hover { color: var(--color-text); }
.logo__mark { color: var(--color-accent-400); flex: none; }

.lang-switch {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding-inline: 14px;
  border: 1px solid var(--color-neutral-800);
  border-radius: 999px;
  font-size: 13px;
  color: var(--color-neutral-300);
}
.lang-switch:hover { border-color: var(--color-accent-600); color: var(--color-accent-300); }

/* ── page head ──────────────────────────────────────────────────────────── */
.breadcrumbs {
  margin: 28px auto 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-neutral-500);
}
.breadcrumbs a { color: var(--color-neutral-400); }
.breadcrumbs a:hover { color: var(--color-accent-300); }

.page-hero { margin-block: clamp(20px, 4vw, 36px) clamp(28px, 5vw, 48px); }

.page-hero__title {
  font-size: clamp(32px, 6vw, 52px);
  letter-spacing: -0.03em;
  line-height: 1.08;
  text-wrap: balance;
}
[lang="fa"] .page-hero__title { line-height: 1.3; }

.page-hero__sub {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--color-neutral-400);
}

/* ── long-form body ─────────────────────────────────────────────────────── */
.prose { padding-bottom: clamp(48px, 8vw, 88px); }

.prose h2 {
  margin: clamp(32px, 4vw, 48px) 0 12px;
  font-size: clamp(19px, 2.6vw, 23px);
  color: var(--color-neutral-100);
}
.prose h2:first-child { margin-top: 0; }

.prose h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  color: var(--color-neutral-100);
}

.prose p, .prose li { color: var(--color-neutral-300); }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 14px; padding-inline-start: 22px; }
.prose li { margin-bottom: 8px; }
.prose a { text-decoration: underline; }
.prose strong { color: var(--color-neutral-100); font-weight: 500; }

.prose code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  font-size: 0.9em;
}

.prose__updated {
  display: inline-block;
  margin: 0 0 clamp(24px, 3vw, 36px);
  padding: 4px 12px;
  border: 1px solid var(--color-accent-600);
  border-radius: 999px;
  font-size: 12px;
  color: var(--color-accent-300);
}

/* ── FAQ accordion ──────────────────────────────────────────────────────── */
.faq-list { padding-bottom: clamp(48px, 8vw, 88px); }

.faq-item {
  border-top: 1px solid var(--color-divider);
  padding: 4px 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--color-divider); }

.faq-item > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: clamp(15px, 2.2vw, 17px);
  color: var(--color-neutral-100);
}
.faq-item > summary::-webkit-details-marker { display: none; }

/* The chevron is generated rather than marked up, so the pages stay plain
   <details>/<summary> and work with CSS disabled. */
.faq-item > summary::after {
  content: "+";
  flex: none;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-neutral-800);
  border-radius: 50%;
  color: var(--color-accent-300);
  font-size: 14px;
  line-height: 1;
  transition: transform .28s cubic-bezier(.2,.7,.2,1);
}
.faq-item[open] > summary::after { transform: rotate(45deg); }

.faq-item > p {
  margin: 0 0 18px;
  padding-inline-end: clamp(0px, 4vw, 42px);
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-neutral-300);
}

/* ── footer ─────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: clamp(32px, 5vw, 56px) 40px;
  font-size: 13px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 clamp(14px, 2vw, 22px);
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}
.footer-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--color-neutral-400);
}
.footer-nav a:hover { color: var(--color-text); }

.domains-row, .copyright { margin: 0 0 10px; color: var(--color-neutral-500); font-size: 12px; }
.domains-row a { color: var(--color-neutral-400); }
.domains-row a:hover { color: var(--color-accent-300); }
.link-accent { color: var(--color-accent-400); }