/* بحر العلوم — theme "Bahr 2026". Build replaces /static/noto-sans-arabic.43b1a43918.woff2 with the fingerprinted font path. */
@font-face{font-family:"Bahr Sans";src:url("/static/noto-sans-arabic.43b1a43918.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

/* ---------- Tokens ---------- */
:root{
  color-scheme:light;
  --bg:#ffffff;--surface:#ffffff;--foam:#f1f5fa;--foam-2:#e6eef7;
  --ink:#0d2440;--text:#26384d;--muted:#55687d;--line:#d9e3ee;--line-soft:#e8eef5;
  --sea:#1559b7;--sea-strong:#0d4592;--sea-tint:#e8f1fc;
  --deep:#0b2545;--deep-2:#11335c;--on-deep:#ffffff;--on-deep-muted:#c4d4e8;
  --focus:#f0a63a;--mark:#fdf0c8;
  --c:#1559b7;--c-tint:#e8f1fc;
  --science:#4a45c2;--science-tint:#eeedfb;
  --technology:#0a6a94;--technology-tint:#e4f2f8;
  --nature:#2b7745;--nature-tint:#e6f3ea;
  --culture:#983866;--culture-tint:#f8e9f0;
  --life:#985310;--life-tint:#f8eee2;
  --places:#0c7068;--places-tint:#e2f3f1;
  --shadow:0 1px 2px rgba(13,36,64,.06),0 6px 24px -12px rgba(13,36,64,.18);
  --font:"Bahr Sans",Tahoma,Arial,sans-serif;
  --wrap:1200px;--gutter:16px;
  --r-sm:6px;--r-md:10px;--r-lg:16px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  color-scheme:dark;
  --bg:#0b1626;--surface:#0f1d31;--foam:#0f1e33;--foam-2:#152741;
  --ink:#eef3f9;--text:#d2dce8;--muted:#9bacc0;--line:#22344d;--line-soft:#1a2b42;
  --sea:#83b6ff;--sea-strong:#a9cbff;--sea-tint:#14284a;
  --deep:#081325;--deep-2:#0d2140;--on-deep-muted:#a9bbd2;--mark:#4a3c12;
  --science:#aaa6ff;--science-tint:#1d1f45;--technology:#6cc4ea;--technology-tint:#0f2b3b;
  --nature:#7fd09a;--nature-tint:#13301f;--culture:#f0a0c6;--culture-tint:#3a1a2b;
  --life:#f1b56f;--life-tint:#36250f;--places:#6fd4c9;--places-tint:#0e2f2c;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 28px -14px rgba(0,0,0,.6);
}}
:root[data-theme=dark]{
  color-scheme:dark;
  --bg:#0b1626;--surface:#0f1d31;--foam:#0f1e33;--foam-2:#152741;
  --ink:#eef3f9;--text:#d2dce8;--muted:#9bacc0;--line:#22344d;--line-soft:#1a2b42;
  --sea:#83b6ff;--sea-strong:#a9cbff;--sea-tint:#14284a;
  --deep:#081325;--deep-2:#0d2140;--on-deep-muted:#a9bbd2;--mark:#4a3c12;
  --science:#aaa6ff;--science-tint:#1d1f45;--technology:#6cc4ea;--technology-tint:#0f2b3b;
  --nature:#7fd09a;--nature-tint:#13301f;--culture:#f0a0c6;--culture-tint:#3a1a2b;
  --life:#f1b56f;--life-tint:#36250f;--places:#6fd4c9;--places-tint:#0e2f2c;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 28px -14px rgba(0,0,0,.6);
}
.cat-science{--c:var(--science);--c-tint:var(--science-tint)}
.cat-technology{--c:var(--technology);--c-tint:var(--technology-tint)}
.cat-nature{--c:var(--nature);--c-tint:var(--nature-tint)}
.cat-culture{--c:var(--culture);--c-tint:var(--culture-tint)}
.cat-life{--c:var(--life);--c-tint:var(--life-tint)}
.cat-places{--c:var(--places);--c-tint:var(--places-tint)}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:136px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.85;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
h1,h2,h3,h4{color:var(--ink);font-weight:800;line-height:1.45;margin:0}
p,ul,ol,figure{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
img{height:auto}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
main:focus{outline:none}
::selection{background:var(--sea);color:#fff}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.icon.flip{transform:scaleX(-1)}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.wrap{width:min(var(--wrap),100% - 2*var(--gutter));margin-inline:auto}
[hidden]{display:none!important}
.skip-link{position:fixed;inset-inline-start:16px;top:-80px;z-index:100;background:var(--deep);color:#fff;padding:10px 16px;border-radius:var(--r-sm);font-weight:700}
.skip-link:focus{top:12px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-bar{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{width:40px;height:40px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:21px;font-weight:850;color:var(--ink)}
.brand-latin{font-size:11px;color:var(--muted);letter-spacing:.06em;text-align:right}
.header-bar .search-form{margin-inline-start:auto;width:min(420px,100%)}
.header-actions{display:flex;align-items:center;gap:6px}
.icon-btn{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink)}
.icon-btn:hover{border-color:var(--sea);color:var(--sea)}
.search-link{display:none}
.theme-toggle .icon-sun{display:none}
:root[data-theme=dark] .theme-toggle .icon-sun{display:block}
:root[data-theme=dark] .theme-toggle .icon-moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .theme-toggle .icon-sun{display:block}:root:not([data-theme=light]) .theme-toggle .icon-moon{display:none}}
.primary-nav{border-top:1px solid var(--line-soft)}
.primary-nav ul{display:flex;gap:4px;margin:0;padding:0;list-style:none;overflow-x:auto;scrollbar-width:none;-webkit-mask-image:linear-gradient(to left,#000 92%,transparent);mask-image:linear-gradient(to left,#000 92%,transparent)}
.primary-nav ul::-webkit-scrollbar{display:none}
.primary-nav a{display:block;white-space:nowrap;padding:11px 12px;font-size:15px;font-weight:600;color:var(--text);position:relative}
.primary-nav a:hover{color:var(--sea)}
.primary-nav a[aria-current=page]{color:var(--sea)}
.primary-nav a[aria-current=page]::after{content:"";position:absolute;inset-inline:12px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:currentColor}
.primary-nav li:first-child a{padding-inline-start:0}
.primary-nav li:first-child a[aria-current=page]::after{inset-inline-start:0}

/* ---------- Search ---------- */
.search-form{position:relative;display:flex;align-items:center;background:var(--foam);border:1px solid var(--line);border-radius:999px;transition:border-color .15s,box-shadow .15s}
.search-form:focus-within{border-color:var(--sea);box-shadow:0 0 0 4px color-mix(in srgb,var(--sea) 18%,transparent);background:var(--surface)}
.search-form input{flex:1;min-width:0;border:0;background:transparent;padding:9px 18px;font-size:15px;outline:none}
.search-form input::placeholder{color:var(--muted);opacity:1}
.search-form input::-webkit-search-cancel-button{display:none}
.search-form button{display:flex;align-items:center;gap:8px;border:0;background:transparent;color:var(--sea);padding:8px 14px;border-radius:999px}
.search-form--large{border-radius:14px;background:var(--surface);box-shadow:var(--shadow)}
.search-form--large input{font-size:18px;padding:16px 20px}
.search-form--large button{margin:6px;background:var(--sea);color:#fff;padding:11px 22px;border-radius:10px;font-weight:700;font-size:16px}
.search-form--large button:hover{background:var(--sea-strong)}
:root[data-theme=dark] .search-form--large button{color:#071224}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .search-form--large button{color:#071224}}
.suggest{position:absolute;top:calc(100% + 8px);inset-inline:0;z-index:50;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);padding:6px;max-height:min(70vh,460px);overflow:auto}
.suggest a{display:block;padding:9px 12px;border-radius:var(--r-sm);line-height:1.6}
.suggest a:hover,.suggest a[aria-selected=true]{background:var(--sea-tint)}
.suggest strong{display:block;font-size:15px;color:var(--ink);font-weight:700}
.suggest small{display:block;font-size:13px;color:var(--muted)}
.suggest .suggest-group{font-size:12px;color:var(--muted);padding:8px 12px 2px;font-weight:700}
.suggest .suggest-all{color:var(--sea);font-weight:700;font-size:14px;border-top:1px solid var(--line-soft);margin-top:4px;border-radius:0 0 var(--r-sm) var(--r-sm)}
.suggest-empty{padding:10px 12px;font-size:14px;color:var(--muted)}
mark{background:var(--mark);color:inherit;border-radius:3px;padding:0 1px}

/* ---------- Shared pieces ---------- */
.cat-chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;line-height:1;color:var(--c);background:var(--c-tint);padding:7px 11px 7px 12px;border-radius:999px}
.cat-chip .icon{width:15px;height:15px;stroke-width:1.9}
a.cat-chip:hover{background:var(--c);color:var(--bg)}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 22px;border-radius:10px;background:var(--sea);color:#fff;font-weight:700;font-size:16px;border:1px solid var(--sea)}
.button:hover{background:var(--sea-strong);border-color:var(--sea-strong)}
:root[data-theme=dark] .button{color:#071224}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .button{color:#071224}}
.button--ghost,:root[data-theme=dark] .button--ghost{background:transparent;color:var(--sea)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .button--ghost{background:transparent;color:var(--sea)}}
.button--ghost:hover{background:var(--sea-tint)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:clamp(23px,2.4vw,28px)}
.section-link{font-size:15px;font-weight:700;color:var(--sea);white-space:nowrap}
.section-link:hover{text-decoration:underline;text-underline-offset:5px}
.section-intro{color:var(--muted);max-width:68ch;margin:-8px 0 22px}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:4px 0;margin:0;padding:0;list-style:none;font-size:14px;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center}
.breadcrumb li+li::before{content:"/";margin-inline:10px;opacity:.5}
.breadcrumb a{color:var(--sea)}
.breadcrumb a:hover{text-decoration:underline;text-underline-offset:4px}
.breadcrumb [aria-current]{color:var(--muted);max-width:42ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- Cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:20px}
.card{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:22px 22px 18px;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--c);border-radius:var(--r-sm) var(--r-sm) var(--r-md) var(--r-md);transition:border-color .15s,box-shadow .15s}
.card:hover{box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--c) 45%,var(--line));border-top-color:var(--c)}
.card .cat-chip{position:relative;z-index:1}
.card-title{font-size:20px;line-height:1.55}
.card-title a::after{content:"";position:absolute;inset:0;border-radius:inherit}
.card-title a:focus-visible{outline:none}
.card:has(.card-title a:focus-visible){outline:3px solid var(--focus);outline-offset:3px}
.card:hover .card-title a{color:var(--sea)}
.card-excerpt{font-size:15px;line-height:1.85;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:auto;padding-top:4px;font-size:13px;color:var(--muted)}
.card-meta span{display:inline-flex;align-items:center;gap:6px}
.card-meta .icon{width:16px;height:16px}

/* ---------- Home: hero ---------- */
.hero{position:relative;background:radial-gradient(120% 140% at 85% -10%,var(--deep-2) 0%,var(--deep) 60%);color:var(--on-deep);padding:56px 0 92px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(180deg,transparent 0 46px,rgba(255,255,255,.035) 46px 47px);pointer-events:none}
.hero-inner{position:relative;max-width:860px;margin-inline:auto;text-align:center}
.hero h1{color:#fff;font-size:clamp(32px,5.2vw,56px);font-weight:900;line-height:1.35;text-wrap:balance}
.hero-lead{font-size:clamp(16px,1.7vw,19px);color:var(--on-deep-muted);max-width:60ch;margin:16px auto 30px;line-height:1.9}
.hero .search-form--large{max-width:680px;margin-inline:auto;border-color:transparent}
.hero-questions{margin-top:26px}
.hero-questions p{font-size:14px;color:var(--on-deep-muted);margin-bottom:12px}
.hero-questions ul{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:0;padding:0;list-style:none}
.hero-questions a{display:inline-block;padding:7px 15px;border:1px solid rgba(255,255,255,.22);border-radius:999px;font-size:14px;line-height:1.7;color:#fff;background:rgba(255,255,255,.04)}
.hero-questions a:hover{background:#fff;color:var(--deep);border-color:#fff}
.hero-wave{position:absolute;inset-inline:0;bottom:-1px;width:100%;height:48px;fill:var(--bg)}

/* ---------- Home: sections ---------- */
.home{padding-block:12px 24px}
.home-section{padding-block:40px}
.home-section+.home-section,.home-columns+.home-section{border-top:1px solid var(--line-soft)}
.featured{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:24px}
.feature-lead,.feature-small{position:relative}
.feature-lead{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.feature-media{display:block;overflow:hidden;background:var(--foam)}
.feature-lead .feature-media{aspect-ratio:16/8.4}
.feature-media img{width:100%;height:100%;object-fit:cover}
.feature-lead .feature-body{padding:24px 28px 26px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.feature-lead h3{font-size:clamp(23px,2.6vw,30px);line-height:1.45}
.feature-lead p:not(.card-meta){color:var(--muted);font-size:16px;max-width:60ch}
.feature-lead h3 a::after,.feature-small h3 a::after{content:"";position:absolute;inset:0}
.feature-lead .cat-chip,.feature-small .cat-chip{position:relative;z-index:1}
.feature-lead:hover h3 a,.feature-small:hover h3 a{color:var(--sea)}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.feature-small{display:grid;grid-template-columns:minmax(0,1fr) 38%;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.feature-small .feature-media{grid-column:2;grid-row:1;min-height:100%}
.feature-small .feature-body{grid-column:1;grid-row:1;padding:20px 22px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;align-self:center}
.feature-small h3{font-size:19px;line-height:1.55}
.feature-lead:has(h3 a:focus-visible),.feature-small:has(h3 a:focus-visible){outline:3px solid var(--focus);outline-offset:3px}
.feature-lead h3 a:focus-visible,.feature-small h3 a:focus-visible{outline:none}

.category-tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.category-tile{display:flex;align-items:center;gap:14px;height:100%;padding:18px 18px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);transition:border-color .15s,background .15s}
.category-tile:hover{border-color:var(--c);background:var(--c-tint)}
.tile-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:var(--c-tint);color:var(--c);flex-shrink:0}
.tile-icon .icon{width:24px;height:24px}
.category-tile:hover .tile-icon{background:var(--c);color:var(--bg)}
.tile-text{display:flex;flex-direction:column;line-height:1.6;min-width:0}
.tile-text strong{font-size:17px;color:var(--ink)}
.tile-text span{font-size:14px;color:var(--muted)}
.tile-count{margin-inline-start:auto;font-size:13px;font-weight:700;color:var(--c);white-space:nowrap}
.category-tiles--compact{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}

.home-columns{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;border-top:1px solid var(--line-soft)}
.home-columns .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.home-aside{padding-block:40px;display:flex;flex-direction:column;gap:20px}
.start-box{background:var(--foam);border-radius:var(--r-lg);padding:24px}
.start-box h2{font-size:22px}
.start-box>p{font-size:14px;color:var(--muted);margin:6px 0 10px;line-height:1.8}
.start-box ul{margin:0;padding:0;list-style:none}
.start-box li+li{border-top:1px solid var(--line)}
.start-box li a{display:flex;gap:12px;align-items:flex-start;padding:14px 0}
.start-box li a:hover strong{color:var(--sea)}
.start-icon{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--c-tint);color:var(--c);flex-shrink:0;margin-top:3px}
.start-icon .icon{width:18px;height:18px}
.start-box strong{display:block;font-size:16px;line-height:1.6;color:var(--ink)}
.start-box small{font-size:13px;color:var(--muted)}
.trust-box{border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px}
.trust-box>.icon{width:28px;height:28px;color:var(--sea);margin-bottom:8px}
.trust-box h2{font-size:19px}
.trust-box p{font-size:14px;color:var(--muted);margin:6px 0 10px;line-height:1.85}
.trust-box a{font-size:15px;font-weight:700;color:var(--sea)}
.trust-box a:hover{text-decoration:underline;text-underline-offset:5px}

.topic-index{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0 24px;border-top:1px solid var(--line-soft)}
.topic-index a{display:flex;flex-direction:column;padding:12px 2px;border-bottom:1px solid var(--line-soft);line-height:1.5}
.topic-index strong{font-size:16px;color:var(--ink);font-weight:700}
.topic-meta{display:flex;flex-wrap:wrap;gap:0 12px;font-size:13px;color:var(--muted)}
.topic-meta b{color:var(--sea);font-weight:700}
.topic-index a:hover strong{color:var(--sea)}
.topic-count{margin-inline-start:auto}
.topic-count{display:inline-grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:var(--sea);color:#fff;font-size:12px;font-weight:700;line-height:1}
:root[data-theme=dark] .topic-count{color:#071224}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .topic-count{color:#071224}}

/* ---------- Page heads & listings ---------- */
.page-head{background:var(--foam);border-bottom:1px solid var(--line-soft);padding:22px 0 30px}
.page-head .breadcrumb{margin-bottom:18px}
.page-head-row{display:flex;align-items:flex-start;gap:18px}
.page-head h1{font-size:clamp(28px,3.6vw,40px);line-height:1.4}
.page-head-row p{color:var(--muted);max-width:68ch;margin-top:8px;font-size:17px}
.page-head-row p a{color:var(--sea);text-decoration:underline;text-underline-offset:4px}
.page-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:14px;background:var(--surface);color:var(--sea);border:1px solid var(--line);flex-shrink:0;margin-top:4px}
.page-icon .icon{width:28px;height:28px}
.page-head--cat{background:var(--c-tint)}
.page-head--cat .page-icon{background:var(--c);color:var(--bg);border-color:transparent}
.page-count{margin-top:14px;font-size:14px;font-weight:700;color:var(--muted)}
.page-head--cat .page-count{color:var(--c)}
.page-head .search-form--large{margin-top:22px;max-width:720px}
.listing{padding-block:28px 64px}
.filter-chips ul{display:flex;gap:8px;margin:0 0 26px;padding:0;list-style:none;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.filter-chips ul::-webkit-scrollbar{display:none}
.filter-chips a{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;padding:8px 15px;border:1px solid var(--line);border-radius:999px;font-size:14px;font-weight:600;background:var(--surface)}
.filter-chips a .icon{width:16px;height:16px;color:var(--c)}
.filter-chips a:hover{border-color:var(--c,var(--sea))}
.filter-chips a[aria-current=page]{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.filter-chips a[aria-current=page] .icon{color:inherit}
.pagination{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line-soft)}
.pagination ol{display:flex;gap:6px;margin:0;padding:0;list-style:none}
.pagination ol a,.pagination ol span{display:grid;place-items:center;min-width:42px;height:42px;border-radius:10px;border:1px solid var(--line);font-weight:700}
.pagination ol span{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.pagination ol a:hover{border-color:var(--sea);color:var(--sea)}
.page-step{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--sea)}
.empty-note{padding:28px;background:var(--foam);border-radius:var(--r-md);color:var(--muted)}
.block-title{font-size:24px;margin-bottom:20px}

/* ---------- Directory ---------- */
.directory-tools{max-width:620px;margin-bottom:30px}
.directory-tools label{display:block;font-weight:700;color:var(--ink);margin-bottom:8px}
.directory-tools input{width:100%;padding:13px 18px;border:1px solid var(--line);border-radius:12px;background:var(--surface);font-size:17px}
.directory-tools input:focus{outline:none;border-color:var(--sea);box-shadow:0 0 0 4px color-mix(in srgb,var(--sea) 18%,transparent)}
.directory-status{font-size:14px;color:var(--muted);margin-top:10px}
.directory-grid{columns:3 300px;column-gap:20px}
.directory-group{break-inside:avoid;margin-bottom:20px;padding:20px 22px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface)}
.directory-group h2{font-size:20px}
.directory-group h2 a:hover{color:var(--sea)}
.directory-count{font-size:13px;color:var(--muted);margin:2px 0 14px}
.directory-group details{margin-top:12px}
.directory-group summary{cursor:pointer;font-size:14px;font-weight:700;color:var(--sea);width:max-content;max-width:100%}
.directory-group details[open] summary{margin-bottom:10px}
.topic-links{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.topic-links a{display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:999px;background:var(--foam);font-size:14px;line-height:1.7;color:var(--text);border:1px solid transparent}
.topic-links a:hover{border-color:var(--sea);color:var(--sea)}
.topic-links a.has-articles{background:var(--sea-tint);color:var(--sea);font-weight:700}
.topic-links .topic-count{min-width:20px;height:20px;font-size:11px}
.subtopics{margin-bottom:36px}
.subtopics h2{font-size:22px;margin-bottom:16px}
.subtopics--related{margin:48px 0 0;padding-top:30px;border-top:1px solid var(--line-soft)}
.subtopics--related .section-link{display:inline-block;margin-top:18px}
.empty-state{padding:30px;background:var(--foam);border-radius:var(--r-lg)}
.empty-state h2{font-size:23px}
.empty-state>p{color:var(--muted);margin:8px 0 22px}
.empty-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- Article ---------- */
.reading-progress{position:fixed;top:0;inset-inline:0;height:3px;z-index:60;background:var(--sea);transform-origin:right;transform:scaleX(0);pointer-events:none}
@supports (animation-timeline:scroll()){
  @media (prefers-reduced-motion:no-preference){.reading-progress{animation:progress linear both;animation-timeline:scroll(root)}}
}
@keyframes progress{to{transform:scaleX(1)}}
.article-wrap{padding-top:22px}
.article-header{max-width:860px;margin:26px 0 30px;display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.article-header h1{font-size:clamp(30px,4.4vw,48px);line-height:1.38;font-weight:900;text-wrap:balance}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin:0;padding:0;list-style:none;font-size:14px;color:var(--muted)}
.article-meta li{display:inline-flex;align-items:center;gap:7px}
.article-meta .icon{width:17px;height:17px}
.article-meta a{color:var(--sea)}
.article-meta a:hover{text-decoration:underline;text-underline-offset:4px}
.article-hero{margin:0 0 36px}
.article-hero img{width:100%;border-radius:var(--r-lg);background:var(--foam)}
.article-hero figcaption{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.8}
.article-hero figcaption a{color:var(--sea);text-decoration:underline;text-underline-offset:3px}
.article-layout{display:grid;grid-template-columns:minmax(0,720px) minmax(220px,280px);justify-content:space-between;gap:56px;padding-bottom:56px}
.article-layout>.prose{grid-column:1;grid-row:1}
.article-aside{grid-column:2;grid-row:1}
.toc{position:sticky;top:140px;border-inline-start:2px solid var(--line);padding-inline-start:18px}
.toc summary,.toc-title{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--ink);font-size:16px;margin-bottom:10px}
.toc summary{cursor:pointer;list-style:none}
.toc--mobile{display:none}
.toc summary::-webkit-details-marker{display:none}
.toc summary .icon,.toc-title .icon{width:18px;height:18px;color:var(--sea)}
.toc ol{margin:0;padding:0;list-style:none;counter-reset:toc}
.toc li{counter-increment:toc}
.toc a{display:block;padding:6px 0;font-size:14.5px;line-height:1.7;color:var(--muted);position:relative}
.toc a:hover{color:var(--sea)}
.toc a.is-active{color:var(--ink);font-weight:700}
.toc a.is-active::before{content:"";position:absolute;inset-inline-start:-20px;top:8px;bottom:8px;width:2px;background:var(--sea)}

.prose{font-size:19px;line-height:2.05;color:var(--text)}
.prose>*+*,.prose section>*+*{margin-top:1.05em}
.prose section{margin-top:2.2em}
.prose h2{font-size:clamp(24px,2.6vw,29px);line-height:1.5;margin-top:0}
.prose section>h2+*{margin-top:.6em}
.prose h3{font-size:21px;line-height:1.55;margin-top:1.6em}
.prose a{color:var(--sea);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.prose a:hover{text-decoration-thickness:2px}
.prose ul,.prose ol{padding-inline-start:1.4em}
.prose li+li{margin-top:.4em}
.prose li::marker{color:var(--sea)}
.prose strong{color:var(--ink)}
.article-intro{font-size:clamp(20px,2vw,22px);line-height:1.95;color:var(--ink);font-weight:500}
.prose .citations{font-size:.62em;line-height:0;vertical-align:super;white-space:nowrap;color:var(--muted)}
.prose .citations a{text-decoration:none;font-weight:700;padding:0 1px}
.prose .citations a:hover{text-decoration:underline}
.prose table{width:100%;border-collapse:collapse;font-size:16px;line-height:1.7;margin-block:1.4em;display:block;overflow-x:auto}
.prose table:not(:has(tbody tr:nth-child(12))){display:table}
.prose th,.prose td{padding:10px 14px;text-align:start;border-bottom:1px solid var(--line)}
.prose thead th{background:var(--foam);color:var(--ink);font-weight:800;border-bottom:2px solid var(--ink)}
.prose tbody tr:hover{background:var(--foam)}
.article-figure{margin-block:1.8em}
.article-figure img{width:100%;border:1px solid var(--line);border-radius:var(--r-md);background:#fff}
.article-figure figcaption{font-size:14px;color:var(--muted);margin-top:10px;line-height:1.8}
.sources{margin-top:3em!important;padding:26px 28px;background:var(--foam);border-radius:var(--r-lg)}
.sources h2{font-size:22px}
.sources ol{margin:16px 0 0;padding:0;list-style:none;counter-reset:src}
.sources li{counter-increment:src;display:grid;grid-template-columns:auto 1fr;column-gap:12px;font-size:15.5px;line-height:1.8;padding:9px 0;border-top:1px solid var(--line)}
.sources li::before{content:"[" counter(src) "]";grid-row:span 2;font-weight:800;color:var(--sea);font-size:14px;padding-top:2px}
.sources li:target{background:var(--mark);border-radius:6px}
.sources li a{text-decoration:none;color:var(--ink);font-weight:600}
.sources li a:hover{color:var(--sea);text-decoration:underline}
.method-note a{color:var(--sea)}
.source-host{font-size:13px;color:var(--muted);text-align:right}
.method-note{font-size:14.5px;line-height:1.9;color:var(--muted);margin-top:18px!important;padding-top:16px;border-top:1px solid var(--line)}
.article-footer{margin-top:2.4em!important;display:flex;flex-direction:column;gap:22px;font-size:16px}
.article-topics{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.article-topics p{font-weight:700;color:var(--ink);font-size:15px}
.article-topics ul{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.article-topics a{display:inline-block;padding:5px 13px;border-radius:999px;border:1px solid var(--line);font-size:14px;line-height:1.7;color:var(--text);text-decoration:none}
.article-topics a:hover{border-color:var(--sea);color:var(--sea)}
.share{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-top:22px;border-top:1px solid var(--line-soft)}
.share>p:first-child{font-weight:700;color:var(--ink);font-size:15px}
.share ul{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.share-btn{display:inline-flex;align-items:center;gap:7px;min-height:38px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:600;color:var(--text)!important;text-decoration:none!important}
.share-btn .icon{width:16px;height:16px}
.share-btn:hover{border-color:var(--sea);color:var(--sea)!important}
.share-status{width:100%;font-size:14px;color:var(--nature);min-height:1em}
.share-status:empty{display:none}
.related{background:var(--foam);border-top:1px solid var(--line-soft);padding:44px 0 56px}

/* ---------- Policy pages ---------- */
.policy-layout{display:grid;grid-template-columns:220px minmax(0,740px);gap:56px;padding-block:36px 64px}
.policy-nav ul{position:sticky;top:140px;margin:0;padding:0;list-style:none;border-inline-start:2px solid var(--line)}
.policy-nav a{display:block;padding:8px 18px;font-size:15px;color:var(--muted);margin-inline-start:-2px;border-inline-start:2px solid transparent}
.policy-nav a:hover{color:var(--sea)}
.policy-nav a[aria-current=page]{color:var(--ink);font-weight:800;border-inline-start-color:var(--sea)}
.policy{font-size:18px}
.policy h2{font-size:24px;margin-top:1.8em}
.policy h2:first-child{margin-top:0}

/* ---------- Search page ---------- */
.search-status{font-size:16px;color:var(--muted);margin-bottom:20px;font-weight:600}
.search-status:empty{display:none}
.search-results .card-grid{margin-bottom:12px}
.topic-hits{margin-bottom:30px}
.topic-hits h2,.search-suggestions h2{font-size:20px;margin-bottom:14px}
.search-suggestions{margin-top:20px}
.notice{padding:16px 20px;border-radius:var(--r-md);background:var(--mark);margin-bottom:20px}
.notice a{text-decoration:underline}
.no-results{padding:28px;border-radius:var(--r-lg);background:var(--foam);margin-bottom:24px}
.no-results h2{font-size:22px}
.no-results p{color:var(--muted);margin-top:6px}

/* ---------- 404 ---------- */
.not-found{max-width:720px;padding-block:64px 80px;text-align:center}
.not-found-code{font-size:clamp(72px,14vw,132px);font-weight:800;line-height:1;color:var(--sea);letter-spacing:.02em;margin-bottom:18px}
.not-found h1{font-size:clamp(28px,4vw,38px)}
.not-found>p:not([class]){color:var(--muted);margin:12px auto 26px;max-width:52ch}
.not-found .empty-actions{justify-content:center}

/* ---------- Footer ---------- */
.site-footer{background:var(--deep);color:var(--on-deep-muted);padding-top:52px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px;padding-bottom:40px}
.site-footer .brand-name{color:#fff}
.site-footer .brand-latin{color:var(--on-deep-muted)}
.footer-brand p{font-size:15px;line-height:1.9;margin-top:16px;max-width:38ch}
.footer-heading{color:#fff;font-weight:800;font-size:16px;margin-bottom:12px}
.site-footer ul{margin:0;padding:0;list-style:none}
.site-footer li a{display:inline-flex;align-items:center;gap:6px;padding:5px 0;font-size:15px;color:var(--on-deep-muted)}
.site-footer li a .icon{width:16px;height:16px}
.site-footer li a:hover{color:#fff;text-decoration:underline;text-underline-offset:5px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);font-size:13.5px}

/* ---------- Responsive ---------- */
@media (min-width:760px){:root{--gutter:24px}}
@media (min-width:1100px){:root{--gutter:32px}}
@media (max-width:1099px){
  .home-columns{grid-template-columns:1fr;gap:0}
  .home-aside{padding-top:0;display:grid;grid-template-columns:1fr 1fr}
  .topic-index{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:959px){
  .article-layout{display:flex;flex-direction:column;gap:0}
  .toc--desktop{display:none}
  .toc--mobile{display:block;position:static;border:1px solid var(--line);border-radius:var(--r-md);padding:4px 18px;margin-bottom:28px;background:var(--surface)}
  .toc summary{margin:0;padding:12px 0}
  .toc summary::after{content:"";width:8px;height:8px;margin-inline-start:auto;border-inline-end:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s}
  .toc[open] summary::after{transform:rotate(-135deg)}
  .toc ol{padding-bottom:10px}
  .toc a.is-active::before{display:none}
  .policy-layout{grid-template-columns:1fr;gap:24px;padding-top:20px}
  .policy-nav ul{position:static;display:flex;flex-wrap:wrap;gap:8px;border:0}
  .policy-nav a{border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin:0;font-size:14px}
  .policy-nav a[aria-current=page]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
  .featured{grid-template-columns:1fr}
  .feature-side{grid-template-rows:none;grid-template-columns:1fr 1fr}
}
@media (max-width:859px){
  .header-bar>.search-form{display:none}
  .search-link{display:grid}
  .header-actions{margin-inline-start:auto}
  .category-tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:759px){
  html{scroll-padding-top:20px}
  .site-header{position:relative}
  body{font-size:16px}
  .header-bar{height:60px;gap:12px}
  .brand img{width:36px;height:36px}
  .brand-name{font-size:19px}
  .primary-nav a{font-size:14.5px;padding:10px 11px}
  .hero{padding:40px 0 76px}
  .hero-lead{margin:12px auto 24px}
  .search-form--large input{font-size:17px;padding:14px 16px}
  .search-form--large button{padding:10px 16px}
  .search-form--large button span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
  .hero-questions ul{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;scrollbar-width:none;margin-inline:calc(-1*var(--gutter));padding-inline:var(--gutter)}
  .hero-questions ul::-webkit-scrollbar{display:none}
  .hero-questions li{flex-shrink:0}
  .home-section{padding-block:32px}
  .feature-side{grid-template-columns:1fr;gap:16px}
  .feature-lead .feature-body{padding:20px}
  .feature-small{grid-template-columns:minmax(0,1fr) 34%}
  .feature-small .feature-body{padding:16px}
  .feature-small h3{font-size:17px}
  .category-tiles{grid-template-columns:1fr;gap:10px}
  .category-tile{padding:14px}
  .tile-icon{width:42px;height:42px}
  .home-columns .card-grid{grid-template-columns:1fr}
  .home-aside{grid-template-columns:1fr}
  .topic-index{grid-template-columns:1fr 1fr;gap:0 16px}
  .card{padding:18px 18px 16px}
  .card-title{font-size:19px}
  .page-head{padding:16px 0 24px}
  .page-icon{width:46px;height:46px;border-radius:12px}
  .page-icon .icon{width:24px;height:24px}
  .page-head-row{gap:14px}
  .page-head-row p{font-size:16px}
  .directory-grid{columns:1}
  .article-header{margin:18px 0 22px;gap:12px}
  .article-meta{gap:6px 16px;font-size:13.5px}
  .article-hero{margin-inline:calc(-1*var(--gutter));margin-bottom:26px}
  .article-hero img{border-radius:0}
  .article-hero figcaption{padding-inline:var(--gutter)}
  .prose{font-size:18px;line-height:2}
  .sources{padding:20px 18px;margin-inline:calc(-1*var(--gutter) + 4px)}
  .pagination .page-step{font-size:0;gap:0}
  .pagination .page-step .icon{width:24px;height:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 20px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:420px){
  .brand-latin{display:none}
}

/* ---------- Motion & print ---------- */
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{
  .site-header,.site-footer,.reading-progress,.article-aside,.share,.related,.breadcrumb,.skip-link{display:none!important}
  body{background:#fff;color:#000;font-size:12pt}
  .prose{font-size:12pt;line-height:1.8}
  .article-layout{display:block}
  .prose a{color:#000}
  .sources{background:none;padding:0}
  .sources a::after{content:" — " attr(href);font-size:9pt;color:#555;word-break:break-all}
}

.pilot-diagram{margin:30px 0}.pilot-diagram img{width:100%;height:auto;border-radius:16px}.pilot-diagram figcaption{font-size:14px;line-height:1.8;color:var(--muted,#9eb2b8);margin-top:10px}.prose table{display:block;overflow-x:auto;max-width:100%}.diagram-scroll{overflow-x:auto;max-width:100%}.diagram-mobile-tip{display:none}@media(max-width:700px){.diagram-scroll img{min-width:720px}.diagram-mobile-tip{display:inline}}

.prose code[dir="ltr"]{direction:ltr;unicode-bidi:isolate;display:inline-block}