:root{
  --bg:#f9f9f7;
  --surface:#fcfcfb;
  --surface-2:#f3f2ef;
  --border:#e4e2dd;
  --ink:#0b0b0b;
  --ink-dim:#52514e;
  --ink-faint:#898781;
  --accent:#2f5d50;
  --accent-soft:#e4ede9;
  --accent-ink:#ffffff;
  --bar-bg:rgba(7,10,14,.94);
  --bar-ink:#f5f5f7;
  --shadow:0 20px 45px -22px rgba(0,0,0,.16);
  --shadow-sm:0 2px 10px rgba(0,0,0,.04);
  --radius:14px;
  --radius-sm:8px;
  --pill:8px;
  --font-display:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,'Courier New',monospace;
  --font-fa:'Vazirmatn','Segoe UI',Tahoma,sans-serif;
  --max:1360px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#000000;
    --surface:#1c1c1e;
    --surface-2:#1c1c1e;
    --border:#2c2c2e;
    --ink:#f5f5f7;
    --ink-dim:#98989d;
    --accent:#6cb89c;
    --accent-soft:#132a22;
    --accent-ink:#08120e;
    --bar-bg:rgba(7,10,14,.94);
    --bar-ink:#f5f5f7;
    --shadow:0 20px 45px -20px rgba(0,0,0,.7);
    --shadow-sm:0 2px 10px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"]{
  --bg:#000000;
  --surface:#1c1c1e;
  --surface-2:#1c1c1e;
  --border:#2c2c2e;
  --ink:#f5f5f7;
  --ink-dim:#98989d;
  --accent:#6cb89c;
  --accent-soft:#132a22;
  --accent-ink:#08120e;
  --bar-bg:rgba(7,10,14,.94);
  --bar-ink:#f5f5f7;
  --shadow:0 20px 45px -20px rgba(0,0,0,.7);
  --shadow-sm:0 2px 10px rgba(0,0,0,.3);
}

*{ box-sizing:border-box; }
html{ background:var(--bg); }
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--font-body); font-size:17px; line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{ text-wrap:balance; margin:0; font-family:var(--font-display); font-weight:700; letter-spacing:-.035em; line-height:1.05; }
a{ color:var(--accent); }
::selection{ background:var(--accent); color:var(--accent-ink); }
@media (prefers-reduced-motion: reduce){ *{ transition:none !important; animation:none !important; } }

.wrap{ max-width:var(--max); margin:0 auto; padding:0 32px; }

/* ---------- system bar ---------- */
.site-header{
  background:var(--bar-bg); color:var(--bar-ink); position:sticky; top:0; z-index:30;
  backdrop-filter:saturate(180%) blur(20px); -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--border);
}
.site-header .bar{
  max-width:var(--max); margin:0 auto; padding:0 32px; height:52px;
  display:flex; align-items:center; gap:4px;
}
.logo{ display:flex; align-items:center; gap:8px; text-decoration:none; color:var(--bar-ink); flex:none; margin-inline-end:22px; }
.logo .mark{
  width:22px; height:22px; background:var(--bar-ink); color:var(--bar-bg); border-radius:6px;
  display:flex; align-items:center; justify-content:center; font-family:var(--font-mono);
  font-weight:700; font-size:.6rem; flex:none;
}

nav.main-nav{ display:flex; gap:2px; }
nav.main-nav a{
  color:color-mix(in srgb, var(--bar-ink) 62%, transparent); text-decoration:none; font-weight:600;
  font-size:.86rem; padding:8px 13px; letter-spacing:-.005em;
  transition:color .15s, background .15s; border-radius:var(--radius-sm);
}
nav.main-nav a:hover{ color:var(--bar-ink); background:color-mix(in srgb, var(--bar-ink) 12%, transparent); }
nav.main-nav a.current{ color:var(--bar-ink); }

.header-actions{ margin-inline-start:auto; display:flex; align-items:center; gap:10px; }
.sys-clock{ font-family:var(--font-mono); font-size:.72rem; color:color-mix(in srgb, var(--bar-ink) 55%, transparent); letter-spacing:.02em; }
.icon-btn{
  width:32px; height:32px; border-radius:50%; border:none;
  background:color-mix(in srgb, var(--bar-ink) 12%, transparent); color:var(--bar-ink);
  display:flex; align-items:center; justify-content:center; cursor:pointer; font-size:.95rem;
  transition:background .15s;
}
.icon-btn:hover{ background:color-mix(in srgb, var(--bar-ink) 22%, transparent); }
.nav-toggle{ display:none; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; border-radius:var(--pill); padding:13px 24px;
  font-family:var(--font-body); font-weight:600; font-size:.95rem; letter-spacing:-.005em; text-decoration:none; cursor:pointer;
  border:1.5px solid transparent; transition:filter .15s, transform .08s, background .15s, border-color .15s, color .15s;
}
.btn:active{ transform:scale(.96); }
.btn-primary{ background:var(--accent); color:var(--accent-ink); }
.btn-primary:hover{ filter:brightness(1.1); }
.btn-outline{ border-color:var(--border); color:var(--ink); background:var(--surface); }
.btn-outline:hover{ border-color:var(--ink-dim); }
.btn-ghost{ color:var(--accent); background:transparent; padding:13px 4px; font-weight:600; }
.btn-ghost:hover{ filter:brightness(1.2); }
.btn-sm{ padding:9px 16px; font-size:.82rem; }

/* ---------- hero ---------- */
.hero{ padding:76px 0 0; }
.hero .path{ font-family:var(--font-body); font-size:.72rem; font-weight:600; color:var(--ink-faint); letter-spacing:.1em; margin-bottom:20px; display:block; }
.hero .path b{ color:var(--ink); font-weight:600; }
.hero h1{ font-size:clamp(1.9rem,3.3vw,2.5rem); max-width:22ch; }
.hero-grid{ display:grid; grid-template-columns:1fr 300px; gap:40px; align-items:end; margin-top:28px; padding-bottom:44px; }
.hero p.lede{ color:var(--ink-dim); font-size:1.18rem; max-width:44ch; margin:0; line-height:1.5; }
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; }
.status-block{
  font-family:var(--font-body); font-size:.76rem; background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:6px 18px; box-shadow:var(--shadow-sm);
}
.status-row{ display:flex; justify-content:space-between; gap:10px; padding:11px 0; border-top:1px solid var(--border); color:var(--ink-dim); }
.status-row:first-child{ border-top:none; }
.status-row b{ color:var(--ink); font-weight:700; font-variant-numeric:tabular-nums; }

/* ---------- section chrome ---------- */
main{ padding:0 0 100px; }
section.block{ padding:56px 0; }
.block-head{ display:flex; align-items:baseline; justify-content:space-between; gap:14px; margin-bottom:26px; }
.block-head h2{
  font-family:var(--font-display); font-size:1.4rem; color:var(--ink); font-weight:700;
}
.block-head h2 .n{ color:var(--accent); font-family:var(--font-body); font-size:1rem; font-weight:600; }
.block-head .see-all{ font-family:var(--font-body); font-weight:600; font-size:.9rem; color:var(--accent); text-decoration:none; white-space:nowrap; }
.block-head .see-all:hover{ filter:brightness(1.2); }

/* ---------- research / article cards ---------- */
.article-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.article-list.single{ grid-template-columns:1fr; }
.article-card{
  display:block; padding:28px; text-decoration:none; color:inherit;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  box-shadow:var(--shadow-sm); transition:box-shadow .2s, transform .2s;
}
.article-card:hover{ box-shadow:var(--shadow); transform:translateY(-2px); }
.article-card .title{ font-family:var(--font-display); font-weight:700; font-size:1.4rem; line-height:1.15; letter-spacing:-.02em; margin-bottom:10px; }
.article-card .excerpt{ color:var(--ink-dim); font-size:.96rem; max-width:48ch; }
.article-card .meta{
  font-family:var(--font-body); font-size:.68rem; color:var(--ink-dim);
  margin-top:18px; display:flex; gap:10px; align-items:center;
}
.tag-pill{
  background:var(--surface-2); border-radius:var(--pill); padding:4px 11px;
  font-family:var(--font-body); font-weight:600; font-size:.68rem; color:var(--ink-dim); border:1px solid var(--border);
}
.tag-pill.accent{ background:var(--accent-soft); color:var(--accent); border-color:transparent; }

/* ---------- news ---------- */
.news-list{ display:flex; flex-direction:column; gap:2px; }
.news-card{
  display:grid; grid-template-columns:60px 1fr auto; gap:20px; padding:20px;
  text-decoration:none; color:inherit; align-items:start; border-radius:var(--radius-sm);
  transition:background .15s;
}
.news-card:hover{ background:var(--surface); box-shadow:var(--shadow-sm); }
.news-card .news-time{ font-family:var(--font-body); font-size:.7rem; color:var(--ink-dim); padding-top:.3em; font-variant-numeric:tabular-nums; }
.news-card .news-body{ min-width:0; }
.news-card .headline{ font-family:var(--font-display); font-weight:700; font-size:1.08rem; letter-spacing:-.01em; margin-bottom:4px; }
.news-card:hover .headline{ color:var(--accent); }
.news-card .summary{ color:var(--ink-dim); font-size:.9rem; max-width:66ch; }
.news-card .news-meta{ margin-top:10px; display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
.news-card .source{ font-family:var(--font-body); font-size:.66rem; color:var(--ink-dim); }
.news-card .source b{ color:var(--ink); font-weight:600; }
.news-card .arrow{ font-family:var(--font-body); color:var(--ink-dim); font-size:.9rem; padding-top:.3em; }
.news-card:hover .arrow{ color:var(--accent); }

/* ---------- empty state ---------- */
.empty{
  border:1px dashed var(--border); border-radius:var(--radius); padding:56px 22px; text-align:center;
  color:var(--ink-dim); font-size:.92rem; grid-column:1/-1; background:var(--surface);
}
.empty .ic{ font-size:1.3rem; display:block; margin-bottom:10px; opacity:.4; }

/* ---------- about / prose ---------- */
.prose{ font-size:1.15rem; max-width:640px; line-height:1.6; }
.prose p{ margin:0 0 1.3em; }
.prose h2{ font-size:1.5rem; margin-top:1.6em; margin-bottom:.5em; }

/* ---------- to-do list ---------- */
.todo-widget{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:28px; box-shadow:var(--shadow); }
.todo-form{ display:flex; gap:10px; margin-bottom:22px; }
.todo-form input{
  flex:1; background:var(--bg); border:1px solid var(--border); color:var(--ink);
  border-radius:var(--radius-sm); padding:12px 14px; font-family:var(--font-body); font-size:.95rem;
}
.todo-form input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.todo-items{ display:flex; flex-direction:column; }
.todo-item{ display:flex; align-items:center; gap:12px; padding:13px 0; border-bottom:1px solid var(--border); }
.todo-items .todo-item:last-child{ border-bottom:none; }
.todo-check{
  width:22px; height:22px; border-radius:50%; border:1.5px solid var(--border); background:var(--bg);
  cursor:pointer; flex:none; display:flex; align-items:center; justify-content:center; font-size:.8rem; color:var(--accent-ink);
}
.todo-check.done{ background:var(--accent); border-color:var(--accent); }
.todo-text{ flex:1; font-size:.98rem; }
.todo-item.done .todo-text{ color:var(--ink-dim); text-decoration:line-through; }
.todo-del{ border:none; background:none; color:var(--ink-dim); cursor:pointer; font-size:.78rem; font-family:var(--font-body); padding:5px 8px; border-radius:var(--pill); opacity:0; transition:opacity .12s, background .12s; }
.todo-item:hover .todo-del{ opacity:1; }
.todo-del:hover{ background:var(--surface-2); color:var(--ink); }
.todo-empty{ color:var(--ink-dim); font-size:.9rem; text-align:center; padding:22px 0; }
.todo-note{ font-family:var(--font-body); font-size:.68rem; color:var(--ink-dim); margin-top:20px; }

/* ---------- log ---------- */
.log-list{ display:flex; flex-direction:column; }
.log-entry{ display:grid; grid-template-columns:120px 1fr; gap:24px; padding:24px 0; border-bottom:1px solid var(--border); }
.log-entry:last-child{ border-bottom:none; }
.log-entry time{ font-family:var(--font-body); font-size:.72rem; color:var(--ink-dim); padding-top:.2em; }
.log-entry .log-text{ font-size:1.02rem; max-width:62ch; }
.log-entry .log-text p{ margin:0; }
.log-entry .tag-pill{ margin-top:12px; display:inline-block; }
@media (max-width:640px){ .log-entry{ grid-template-columns:1fr; gap:8px; } }

/* ---------- now page ---------- */
.now-box{ border:1px solid var(--border); border-radius:var(--radius); padding:38px; background:var(--surface); box-shadow:var(--shadow); max-width:640px; }
.now-box .stamp{ font-family:var(--font-body); font-size:.72rem; color:var(--ink-dim); margin-bottom:18px; display:block; }
.now-box p{ font-size:1.15rem; margin:0 0 1em; line-height:1.55; }
.now-box p:last-child{ margin-bottom:0; }

/* ---------- 404 ---------- */
.error-page{ min-height:60vh; display:flex; flex-direction:column; justify-content:center; padding:40px 0; }
.error-page .code{ font-family:var(--font-body); font-size:.8rem; color:var(--accent); margin-bottom:14px; display:block; }
.error-page h1{ font-size:clamp(2.4rem,7vw,5rem); }
.error-page p{ color:var(--ink-dim); font-size:1.1rem; margin-top:16px; max-width:44ch; }

/* ---------- search ---------- */
.search-wrap{ position:relative; }
.search-box{
  position:absolute; top:calc(100% + 10px); inset-inline-end:0; width:360px;
  background:var(--surface); border:1px solid var(--border); box-shadow:var(--shadow); border-radius:var(--radius);
  display:none; flex-direction:column; z-index:40; max-height:70vh; overflow:hidden;
}
.search-box.open{ display:flex; }
.search-box input{
  border:none; border-bottom:1px solid var(--border); background:transparent; color:var(--ink);
  padding:16px 18px; font-family:var(--font-body); font-size:.95rem; outline:none;
}
.search-results{ overflow-y:auto; padding:6px; }
.search-results a{
  display:block; padding:11px 12px; text-decoration:none; color:inherit; border-radius:var(--radius-sm);
}
.search-results a:hover{ background:var(--bg); }
.search-results .r-title{ font-weight:700; font-size:.9rem; color:var(--ink); }
.search-results .r-meta{ font-family:var(--font-body); font-size:.66rem; color:var(--ink-dim); margin-top:3px; }
.search-empty{ padding:16px; font-family:var(--font-body); font-size:.85rem; color:var(--ink-dim); }

/* ---------- article page ---------- */
.back-link{ display:inline-block; margin-bottom:30px; font-size:.85rem; color:var(--ink-dim); text-decoration:none; font-weight:600; }
.back-link:hover{ color:var(--accent); }
article.post{ padding-top:52px; }
article.post .post-head{ margin-bottom:44px; }
article.post .post-head h1{ font-size:clamp(1.9rem,3.3vw,2.5rem); }
article.post .post-meta{
  font-family:var(--font-body); font-size:.78rem; color:var(--ink-dim);
  margin-top:20px; display:flex; gap:14px; flex-wrap:wrap;
}
article.post .post-body{ font-size:1.14rem; line-height:1.6; }
article.post .post-body p{ margin:0 0 1.3em; max-width:680px; }
article.post .post-body h2{ font-size:2.05rem; margin-top:1.6em; margin-bottom:.5em; }
article.post .post-body h3{ font-size:1.3rem; margin-top:1.4em; margin-bottom:.4em; }
article.post .post-body ul, article.post .post-body ol{ max-width:66ch; padding-inline-start:1.4em; }
article.post .post-body img{ max-width:100%; border-radius:var(--radius); }
article.post .post-body pre{
  background:var(--surface-2); border:1px solid var(--border); border-radius:var(--radius-sm); padding:16px; overflow-x:auto;
  font-family:var(--font-mono); font-size:.85rem; direction:ltr; text-align:left;
}
[dir="rtl"] article.post .post-body,
[dir="rtl"] .hero p.lede{ font-family:var(--font-fa); }

.downloads{ margin-top:36px; border:1px solid var(--border); border-radius:var(--radius); padding:22px 24px; background:var(--surface); box-shadow:var(--shadow-sm); }
.downloads h3{ font-family:var(--font-body); font-size:.74rem; letter-spacing:.02em; color:var(--ink-dim); margin-bottom:12px; font-weight:600; }
.downloads a.dl{
  display:flex; align-items:center; gap:10px; padding:12px 0; text-decoration:none; color:var(--ink);
  font-size:.95rem; border-top:1px solid var(--border);
}
.downloads a.dl:first-of-type{ border-top:none; }
.downloads a.dl .sz{ margin-inline-start:auto; font-family:var(--font-body); font-size:.7rem; color:var(--ink-dim); }

/* ---------- infographic / chart components ---------- */
.stat-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:14px; margin:28px 0; }
.stat-tile{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:22px; box-shadow:var(--shadow-sm); }
.stat-tile .v{ font-family:var(--font-display); font-weight:700; font-size:2rem; letter-spacing:-.02em; }
.stat-tile .l{ color:var(--ink-dim); font-size:.82rem; margin-top:4px; }
.chart-card{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:28px; box-shadow:var(--shadow-sm); margin:28px 0; }
.chart-card h4{ font-family:var(--font-display); font-weight:700; font-size:1.1rem; margin-bottom:4px; }
.chart-card .sub{ color:var(--ink-dim); font-size:.85rem; margin-bottom:18px; }
.chart-card figcaption{ color:var(--ink-dim); font-size:.78rem; margin-top:14px; font-family:var(--font-body); }

/* ---------- article data viz: charts, map, tables ---------- */
.chart-box{ position:relative; height:340px; }
.chart-box.short{ height:280px; }
.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.map-grid{ display:grid; grid-template-columns:1.6fr 1fr; gap:20px; align-items:start; }
.origin-legend{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:14px; }
.origin-chip{ display:inline-flex; align-items:center; gap:6px; font-size:.78rem; color:var(--ink-dim); font-weight:600; }
.origin-chip i{ width:9px; height:9px; border-radius:50%; display:inline-block; }
#importMap{ width:100%; }
#importMap svg{ display:block; width:100%; height:auto; }
.map-detail{
  background:var(--bg); border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:20px; min-height:220px;
}
.map-detail-name{ font-family:var(--font-display); font-weight:700; font-size:1.2rem; margin-bottom:12px; }
.map-detail-row{ display:flex; justify-content:space-between; gap:10px; padding:8px 0; border-top:1px solid var(--border); font-size:.88rem; color:var(--ink-dim); }
.map-detail-row:first-of-type{ border-top:none; }
.map-detail-row b{ color:var(--ink); font-weight:700; text-align:right; }
.map-detail-note{ margin-top:14px; font-size:.82rem; color:var(--ink-dim); line-height:1.5; }
.map-hint{ color:var(--ink-dim); font-size:.85rem; padding:60px 20px; text-align:center; }
.data-table{ width:100%; border-collapse:collapse; font-size:.88rem; margin:20px 0; }
.data-table th{ text-align:left; font-family:var(--font-body); font-size:.68rem; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-dim); font-weight:600; padding:10px 12px; border-bottom:1px solid var(--ink); }
.data-table td{ padding:11px 12px; border-bottom:1px solid var(--border); }
.data-table tr:last-child td{ border-bottom:none; }
.data-table .num{ text-align:right; font-variant-numeric:tabular-nums; font-family:var(--font-mono); font-size:.82rem; }
.callout{ background:var(--accent-soft); border-radius:var(--radius-sm); padding:18px 20px; margin:24px 0; font-size:.95rem; }
.callout b{ color:var(--accent); }
.source-list{ font-size:.82rem; color:var(--ink-dim); line-height:1.9; }
.source-list a{ color:var(--ink-dim); }
.source-list a:hover{ color:var(--accent); }
@media (max-width:800px){ .two-col, .map-grid{ grid-template-columns:1fr; } }

/* ---------- footer ---------- */
footer.site-foot{ border-top:1px solid var(--border); padding:36px 0; }
footer.site-foot .bar{
  max-width:var(--max); margin:0 auto; padding:0 32px; display:flex; justify-content:space-between;
  flex-wrap:wrap; gap:10px; align-items:center;
}
footer.site-foot .foot-links{ display:flex; gap:20px; flex-wrap:wrap; }
footer.site-foot .foot-links a{ color:var(--ink-dim); text-decoration:none; font-size:.85rem; font-weight:600; }
footer.site-foot .foot-links a:hover{ color:var(--accent); }
footer.site-foot .foot-bottom{ color:var(--ink-dim); font-size:.78rem; }

/* ---------- responsive ---------- */
@media (max-width:900px){
  .article-list{ grid-template-columns:1fr; }
  .hero-grid{ grid-template-columns:1fr; gap:24px; }
}
@media (max-width:640px){
  .wrap, .site-header .bar, footer.site-foot .bar{ padding:0 18px; }
  .site-header .bar{ height:52px; }
  nav.main-nav{
    position:fixed; inset:52px 0 0 0; background:var(--bg); flex-direction:column; padding:14px 18px;
    transform:translateY(-8px); opacity:0; pointer-events:none; transition:opacity .16s, transform .16s; z-index:30;
  }
  nav.main-nav.open{ opacity:1; transform:translateY(0); pointer-events:auto; }
  nav.main-nav a{ padding:16px 6px; border-bottom:1px solid var(--border); border-radius:0; font-size:1.05rem; color:var(--ink-dim); }
  nav.main-nav a:hover, nav.main-nav a.current{ color:var(--ink); background:transparent; }
  .nav-toggle{ display:flex; }
  .sys-clock{ display:none; }
  .news-card{ grid-template-columns:36px 1fr; }
  .news-card .arrow{ display:none; }
  .search-box{ position:fixed !important; inset:52px 12px auto 12px !important; width:auto !important; }
}