/* هوش‌نامه — استایل اصلی (RTL، روشن/تیره) */
:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #f0f2f8;
  --text: #161a2b;
  --muted: #5d6478;
  --border: #e3e6ef;
  --primary: #5b4ee6;
  --primary-ink: #ffffff;
  --primary-soft: #ecebfd;
  --accent: #0ea5a4;
  --accent-soft: #e0f5f4;
  --warn-soft: #fff4e0;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 16px rgba(16, 24, 40, .06);
  --radius: 14px;
  --font: "Vazirmatn", Tahoma, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #141414;
  --surface: #1c1c1c;
  --surface-2: #262626;
  --text: #ececec;
  --muted: #a3a3a3;
  --border: #2e2e2e;
  --primary: #a99dff;
  --primary-ink: #141414;
  --primary-soft: #2a2833;
  --accent: #34d3be;
  --accent-soft: #1c2b29;
  --warn-soft: #332a1b;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141414;
    --surface: #1c1c1c;
    --surface-2: #262626;
    --text: #ececec;
    --muted: #a3a3a3;
    --border: #2e2e2e;
    --primary: #a99dff;
    --primary-ink: #141414;
    --primary-soft: #2a2833;
    --accent: #34d3be;
    --accent-soft: #1c2b29;
    --warn-soft: #332a1b;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.85;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.5; margin: 0 0 .6em; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.ltr { direction: ltr; text-align: left; }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row { display: flex; align-items: center; gap: 12px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; white-space: nowrap; }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand small { display: block; font-size: .7rem; font-weight: 500; color: var(--muted); line-height: 1.2; }
.main-nav { display: flex; gap: 2px; margin-inline-start: auto; overflow-x: auto; scrollbar-width: none; }
.main-nav a { padding: 6px 11px; border-radius: 9px; font-size: .93rem; white-space: nowrap; color: var(--muted); }
.main-nav a:hover { background: var(--surface-2); color: var(--text); }
.main-nav a.active { background: var(--primary-soft); color: var(--primary); font-weight: 700; }
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; flex: none;
  border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }
.icon-btn svg { width: 20px; height: 20px; }
.menu-btn { display: none; }
.header-search { display: none; padding-bottom: 12px; }
.header-search.open { display: block; }
.search-form { display: flex; gap: 8px; }
.search-form input {
  flex: 1; min-width: 0; font: inherit; padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}
.search-form input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px; font: inherit; font-weight: 700; cursor: pointer;
  padding: 9px 16px; border-radius: 10px; border: 1px solid var(--primary); background: var(--primary); color: var(--primary-ink);
}
.btn:hover { color: var(--primary-ink); filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--primary); }
.btn.ghost:hover { background: var(--primary-soft); }

@media (max-width: 1080px) {
  .menu-btn { display: inline-grid; }
  .main-nav {
    display: none; position: absolute; inset-inline: 0; top: 64px; flex-direction: column;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: 8px 16px 16px; box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 12px; }
  .header-tools { margin-inline-start: auto; }
}
.header-tools { display: flex; gap: 8px; }

/* ---------- layout ---------- */
main { padding: 24px 0 48px; min-height: 60vh; }
.page-head { margin: 8px 0 24px; }
.page-head h1 { margin-bottom: .3em; }
.page-head p { color: var(--muted); max-width: 760px; }
.section { margin: 36px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.section-head h2 { margin: 0; display: flex; align-items: center; gap: 8px; }
.section-head h2::before { content: ""; width: 6px; height: 22px; border-radius: 3px; background: var(--primary); }
.section-head a { color: var(--primary); font-weight: 600; font-size: .92rem; white-space: nowrap; }
.grid { display: grid; gap: 18px; }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 1000px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); } h1 { font-size: 1.45rem; } }
.with-aside { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; align-items: start; }
@media (max-width: 960px) { .with-aside { grid-template-columns: minmax(0, 1fr); } }
.aside-sticky { position: sticky; top: 84px; display: grid; gap: 18px; }

/* ---------- cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.card-body { padding: 16px 18px; }
.news-card { display: flex; flex-direction: column; transition: transform .15s ease, border-color .15s ease; }
.news-card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }
.thumb { aspect-ratio: 16 / 9; background: linear-gradient(135deg, var(--primary-soft), var(--accent-soft)); overflow: hidden; position: relative; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb .ph { position: absolute; inset: 0; display: grid; place-items: center; color: var(--primary); opacity: .55; }
.thumb .ph svg { width: 54px; height: 54px; }
.thumb img ~ .ph { display: none; }
.news-card .card-body { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.news-card h3 { font-size: 1.02rem; margin: 0; }
.news-card p { margin: 0; color: var(--muted); font-size: .9rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; color: var(--muted); font-size: .8rem; margin-top: auto; }
.badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 1px 9px; border-radius: 999px;
  font-size: .76rem; font-weight: 700; background: var(--primary-soft); color: var(--primary); white-space: nowrap;
}
.badge.ai { background: var(--primary-soft); color: var(--primary); }
.badge.tech { background: var(--accent-soft); color: var(--accent); }
.badge.en { background: var(--warn-soft); color: #b7791f; }
.badge.plain { background: var(--surface-2); color: var(--muted); }

.news-row { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.news-row:last-child { border-bottom: 0; }
.news-row .thumb { border-radius: 10px; aspect-ratio: 4 / 3; }
.news-row h3 { font-size: .98rem; margin: 0 0 4px; }
@media (max-width: 520px) { .news-row { grid-template-columns: 96px minmax(0, 1fr); } }

.hero { display: grid; grid-template-columns: 1.35fr 1fr; gap: 0; }
.hero .thumb { aspect-ratio: auto; min-height: 320px; }
.hero .card-body { padding: 26px; display: flex; flex-direction: column; gap: 12px; justify-content: center; }
.hero h2 { font-size: 1.5rem; margin: 0; }
.hero p { color: var(--muted); margin: 0; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } .hero .thumb { min-height: 200px; aspect-ratio: 16/9; } }

.intro-band {
  border-radius: var(--radius); padding: 26px; margin-bottom: 24px;
  background: radial-gradient(1200px 300px at 100% 0%, var(--primary-soft), transparent), var(--surface);
  border: 1px solid var(--border);
}
.intro-band h1 { font-size: 1.6rem; margin-bottom: .25em; }
.intro-band p { color: var(--muted); margin: 0; max-width: 780px; }
.stats { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.stat { background: var(--surface-2); border-radius: 10px; padding: 6px 12px; font-size: .86rem; color: var(--muted); }
.stat b { color: var(--text); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 5px 13px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  font-size: .86rem; cursor: pointer; color: var(--text); font-family: inherit;
}
.chip:hover, .chip.active { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.chip .count { color: var(--muted); font-size: .78rem; margin-inline-start: 4px; }

.tile { padding: 18px; display: flex; flex-direction: column; gap: 8px; height: 100%; }
.tile h3 { margin: 0; font-size: 1.05rem; }
.tile p { margin: 0; color: var(--muted); font-size: .9rem; }
.tile .meta { margin-top: auto; padding-top: 6px; }
a.card:hover { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }

.model-logo {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; flex: none;
  color: #fff; font-weight: 800; font-size: 1.2rem; font-family: var(--font);
}
.model-head { display: flex; align-items: center; gap: 12px; }

/* ---------- article ---------- */
.article { padding: 28px; }
@media (max-width: 640px) { .article { padding: 18px; } }
.article h1 { font-size: 1.65rem; }
.article .lead { font-size: 1.08rem; color: var(--text); }
.article img.cover { width: 100%; border-radius: 12px; margin: 10px 0 18px; aspect-ratio: 16/9; object-fit: cover; }
.prose h2 { margin-top: 1.6em; font-size: 1.3rem; }
.prose h3 { margin-top: 1.3em; }
.prose ul, .prose ol { padding-inline-start: 1.4em; margin: 0 0 1em; }
.prose li { margin-bottom: .35em; }
.prose a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote {
  margin: 1em 0; padding: 12px 16px; border-inline-start: 4px solid var(--primary);
  background: var(--primary-soft); border-radius: 8px;
}
.prose blockquote p:last-child { margin: 0; }
.prose code { font-family: var(--mono); background: var(--surface-2); padding: 1px 6px; border-radius: 6px; font-size: .88em; direction: ltr; unicode-bidi: embed; }
.prose pre { direction: ltr; text-align: left; background: #1a1a1a; color: #e8e8e8; padding: 14px 16px; border-radius: 10px; overflow-x: auto; line-height: 1.6; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose table, .table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .93rem; }
.prose th, .prose td, .table th, .table td { border: 1px solid var(--border); padding: 9px 12px; text-align: start; vertical-align: top; }
.prose th, .table th { background: var(--surface-2); }
.table-wrap { overflow-x: auto; }

.source-box {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--surface-2); border-radius: 12px; padding: 14px 16px; margin: 18px 0;
}
.en-title { direction: ltr; text-align: left; color: var(--muted); font-size: .84rem; line-height: 1.5; font-family: "Segoe UI", system-ui, sans-serif; }
.lang-block { text-align: left; border-top: 1px dashed var(--border); margin-top: 18px; padding-top: 16px; font-family: "Segoe UI", system-ui, sans-serif; }
.lang-block h2 { font-size: 1.2rem; margin: 10px 0 8px; }
.notice { background: var(--warn-soft); border-radius: 10px; padding: 10px 14px; font-size: .9rem; margin: 12px 0; }
.original { border-top: 1px dashed var(--border); margin-top: 16px; padding-top: 12px; }

.toc { padding: 16px 18px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 4px 0; }
.toc ul ul { padding-inline-start: 14px; }
.toc a { color: var(--muted); font-size: .9rem; }
.toc a:hover { color: var(--primary); }

/* ---------- prompt ---------- */
.prompt-box { position: relative; background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; white-space: pre-wrap; font-size: .95rem; }
.copy-btn { position: absolute; top: 10px; inset-inline-end: 10px; }
.copy-btn.done { background: var(--accent); border-color: var(--accent); }
.var { color: var(--primary); font-weight: 700; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 0; }
.tab { font: inherit; background: none; border: 0; padding: 10px 14px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 700; }
.tab-panel { display: none; padding: 18px 2px 4px; }
.tab-panel.active { display: block; }
.result-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }

/* ---------- glossary / tools ---------- */
.term { padding: 16px 18px; scroll-margin-top: 90px; }
.term h3 { margin: 0 0 4px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; }
.term h3 span { font-size: .85rem; color: var(--muted); font-weight: 500; direction: ltr; unicode-bidi: embed; }
.term p { margin: 0; color: var(--text); font-size: .94rem; }
.tool { padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; scroll-margin-top: 90px; }
.tool h3 { margin: 0; font-size: 1.02rem; display: flex; justify-content: space-between; gap: 8px; }
.tool p { margin: 0; color: var(--muted); font-size: .9rem; }
.tool .visit { color: var(--primary); font-size: .86rem; font-weight: 600; margin-top: auto; }

/* ---------- comparison ---------- */
.compare-table th:first-child { width: 22%; }
.compare-table td { font-size: .9rem; }
.rating { color: #f5a524; letter-spacing: 1px; white-space: nowrap; }

/* ---------- pagination ---------- */
.pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin-top: 28px; }
.pager span { color: var(--muted); font-size: .9rem; }

/* ---------- search ---------- */
.search-results { display: grid; gap: 10px; margin-top: 18px; }
.search-item { padding: 14px 16px; }
.search-item h3 { margin: 0 0 4px; font-size: 1rem; }
.search-item p { margin: 0; color: var(--muted); font-size: .88rem; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 32px 0 24px; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
.footer-grid h4 { font-size: .95rem; margin-bottom: 8px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin: 4px 0; }
.footer-grid a { color: var(--muted); }
.footer-grid a:hover { color: var(--primary); }
.copyright { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: .82rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .footer-grid { grid-template-columns: 1fr; } }