/* Navia Support Portal — based on the "navia-support-portal-v2" prototype */
@font-face { font-family: 'Bricolage Grotesque'; font-weight: 600; font-display: swap; src: url('fonts/bricolage-grotesque-latin-600-normal.woff2') format('woff2'); }
@font-face { font-family: 'Bricolage Grotesque'; font-weight: 700; font-display: swap; src: url('fonts/bricolage-grotesque-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family: 'Bricolage Grotesque'; font-weight: 800; font-display: swap; src: url('fonts/bricolage-grotesque-latin-800-normal.woff2') format('woff2'); }
@font-face { font-family: 'Instrument Sans'; font-weight: 400; font-display: swap; src: url('fonts/instrument-sans-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'Instrument Sans'; font-weight: 500; font-display: swap; src: url('fonts/instrument-sans-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family: 'Instrument Sans'; font-weight: 600; font-display: swap; src: url('fonts/instrument-sans-latin-600-normal.woff2') format('woff2'); }

:root {
  --ink: #05080f; --ink2: #0b1120; --ink3: #131c2e; --ink4: #1a2540; --ink5: #222f4a;
  --teal: #00c896; --teal2: #00a87e; --blue: #3b82f6; --gold: #f5b944; --red: #ef4444; --grn: #22c55e;
  --t1: #f0f5ff; --t2: #b8ccec; --t3: #8193b3; --t4: #4a5d7c;
  --bd: rgba(255, 255, 255, .07); --bd2: rgba(255, 255, 255, .12); --bd3: rgba(0, 200, 150, .25);
  --r: 12px; --rsm: 8px; --rlg: 18px;
  --sw: 272px; --hh: 60px;
  --fd: 'Bricolage Grotesque', system-ui, sans-serif;
  --fb: 'Instrument Sans', system-ui, 'Noto Sans', 'Noto Sans Devanagari', 'Noto Sans Tamil', sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body { font-family: var(--fb); background: var(--ink); color: var(--t1); min-height: 100vh; line-height: 1.6; font-size: 15px; overflow-x: hidden; }
h1, h2, h3, h4 { font-family: var(--fd); line-height: 1.2; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--teal); color: #000; padding: 8px 14px; border-radius: var(--rsm); z-index: 999; }
.skip:focus { left: 8px; }
[hidden] { display: none !important; }
svg.i { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

/* ---- top bar ---- */
.topbar { height: var(--hh); display: flex; align-items: center; gap: 12px; padding: 0 20px; position: sticky; top: 0; z-index: 50;
  background: rgba(5, 8, 15, .92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--bd2); }
.hamburger { display: none; width: 38px; height: 38px; border-radius: var(--rsm); border: 1px solid var(--bd2); align-items: center; justify-content: center; color: var(--t2); }
.logo { display: flex; align-items: center; gap: 9px; font-family: var(--fd); font-weight: 800; font-size: 18px; color: var(--t1); white-space: nowrap; }
.logo:hover { text-decoration: none; }
.logo-m { width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--teal), var(--blue)); color: #000; display: grid; place-items: center; font-size: 13px; }
.logo em { font-style: normal; color: var(--teal); }
.tsearch { flex: 1; max-width: 560px; position: relative; margin: 0 auto; }
.sbox { display: flex; align-items: center; gap: 8px; background: var(--ink3); border: 1px solid var(--bd2); border-radius: var(--r); padding: 0 4px 0 12px; }
.sbox:focus-within { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(0, 200, 150, .12); }
.sbox svg.i { color: var(--t3); }
.sbox input { flex: 1; min-width: 0; background: none; border: 0; outline: none; padding: 9px 0; font-size: 14px; }
.sbox input::placeholder { color: var(--t3); }
.sbox input::-webkit-search-cancel-button { filter: invert(1) opacity(.5); }
.mic { width: 34px; height: 34px; border-radius: 8px; background: var(--ink4); border: 1px solid var(--bd); display: flex; align-items: center; justify-content: center; color: var(--t2); }
.mic:hover { color: var(--teal); border-color: var(--bd3); }
.mic.rec { color: var(--red); border-color: rgba(239, 68, 68, .4); background: rgba(239, 68, 68, .1); }
.tbtn { height: 36px; padding: 0 14px; border-radius: var(--rsm); font-size: 13px; font-weight: 600; background: var(--teal); color: #000; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.tbtn:hover { background: var(--teal2); text-decoration: none; }

/* search dropdown */
.sdrop { text-align: left; position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: var(--ink3); border: 1px solid var(--bd2); border-radius: var(--rlg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .55); max-height: 70vh; overflow-y: auto; z-index: 60; }
.sd-lbl { padding: 10px 16px 6px; font: 700 10px var(--fd); letter-spacing: 1.5px; text-transform: uppercase; color: var(--t3); border-bottom: 1px solid var(--bd); }
.sd-item { display: block; padding: 11px 16px; border-bottom: 1px solid var(--bd); color: var(--t1); }
.sd-item:hover, .sd-item.on { background: var(--ink4); text-decoration: none; }
.sd-cat { font-size: 10px; color: var(--teal); font-weight: 700; text-transform: uppercase; letter-spacing: .5px; }
.sd-q { font-size: 14px; font-weight: 600; line-height: 1.35; }
.sd-s { font-size: 12px; color: var(--t3); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sd-empty { padding: 22px 16px; color: var(--t3); font-size: 14px; }
.sd-foot { display: block; padding: 10px 16px; background: var(--ink2); font-size: 12.5px; color: var(--teal); }

/* ---- layout ---- */
.wrap { display: flex; min-height: calc(100vh - var(--hh));
  background: linear-gradient(to right, var(--ink2) calc(var(--sw) - 1px), var(--bd) calc(var(--sw) - 1px) var(--sw), transparent var(--sw)); }
.sidebar { width: var(--sw); flex-shrink: 0; background: var(--ink2); border-right: 1px solid var(--bd); position: sticky; top: var(--hh);
  height: calc(100vh - var(--hh)); overflow-y: auto; padding: 12px 0 40px; }
.sb-home { display: flex; align-items: center; gap: 10px; padding: 9px 16px; color: var(--t2); font-weight: 600; font-size: 13px; border-left: 3px solid transparent; }
.sb-home:hover { background: var(--ink3); text-decoration: none; }
.sb-home.on { border-left-color: var(--teal); color: var(--teal); background: rgba(0, 200, 150, .07); }
.sb-t { border-left: 3px solid transparent; }
.sb-t > summary { list-style: none; display: flex; align-items: center; gap: 10px; padding: 9px 16px; cursor: pointer; user-select: none; }
.sb-t > summary::-webkit-details-marker { display: none; }
.sb-t > summary:hover { background: var(--ink3); }
.sb-t.on { border-left-color: var(--teal); background: rgba(0, 200, 150, .05); }
.sb-ico { width: 22px; text-align: center; font-size: 16px; }
.sb-name { flex: 1; font-size: 13px; font-weight: 600; color: var(--t2); line-height: 1.3; }
.sb-t.on .sb-name { color: var(--teal); }
.sb-n { font: 600 10px var(--fd); background: var(--ink4); color: var(--t3); padding: 2px 7px; border-radius: 20px; }
.sb-chev { color: var(--t4); transition: transform .2s; }
.sb-t[open] .sb-chev { transform: rotate(90deg); }
.sb-sub { padding: 2px 0 8px 48px; display: flex; flex-direction: column; }
.sb-sub a { font-size: 12.5px; color: var(--t3); padding: 5px 16px 5px 0; }
.sb-sub a:hover, .sb-sub a.on { color: var(--teal); text-decoration: none; }
.main { flex: 1; min-width: 0; }
.overlay { display: none; }

/* ---- home ---- */
.hero { padding: 56px 40px 40px; text-align: center; border-bottom: 1px solid var(--bd);
  background: radial-gradient(ellipse 800px 400px at 50% -80px, rgba(0, 200, 150, .14), transparent 70%); }
.eyebrow { font: 600 11px var(--fd); letter-spacing: 3px; text-transform: uppercase; color: var(--teal); margin-bottom: 14px; }
.hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -.5px; margin-bottom: 12px; }
.hero h1 span { color: var(--teal); }
.hero p { color: var(--t3); max-width: 520px; margin: 0 auto 26px; }
.hero .tsearch { max-width: 620px; margin-bottom: 24px; }
.hero .sbox { padding: 4px 6px 4px 16px; border-radius: 14px; }
.hero .sbox input { font-size: 16px; padding: 10px 0; }
.qlbl { font: 700 10px var(--fd); letter-spacing: 2px; text-transform: uppercase; color: var(--t3); margin-bottom: 10px; }
.pills { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; max-width: 760px; margin: 0 auto; }
.pill { white-space: nowrap; flex-shrink: 0; background: rgba(0, 200, 150, .07); border: 1px solid rgba(0, 200, 150, .2); color: var(--teal); padding: 6px 14px; border-radius: 30px; font-size: 12.5px; font-weight: 500; }
.pill:hover { background: rgba(0, 200, 150, .15); text-decoration: none; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--bd); }
.stat { padding: 20px 16px; text-align: center; border-right: 1px solid var(--bd); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font: 800 26px var(--fd); color: var(--teal); line-height: 1.1; }
.stat span { font-size: 11px; color: var(--t3); text-transform: uppercase; letter-spacing: 1px; font-weight: 600; }
.sec { padding: 32px 40px; }
.sec-hd { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.sec-hd h2 { font-size: 20px; }
.sec-hd span { font-size: 13px; color: var(--t3); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card { background: var(--ink2); border: 1px solid var(--bd); border-radius: var(--rlg); padding: 20px; display: flex; flex-direction: column; gap: 10px; position: relative; transition: border-color .2s, transform .2s, box-shadow .2s; }
.card:hover { border-color: rgba(0, 200, 150, .28); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0, 0, 0, .3); }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.card-ico { width: 46px; height: 46px; border-radius: 12px; background: var(--ink3); border: 1px solid var(--bd); display: grid; place-items: center; font-size: 22px; }
.badge { font: 700 10px var(--fd); background: var(--ink3); border: 1px solid var(--bd); color: var(--t3); padding: 4px 10px; border-radius: 20px; white-space: nowrap; }
.card h3 { font-size: 16px; }
.card h3 a { color: var(--t1); }
.card h3 a::after { content: ''; position: absolute; inset: 0; border-radius: var(--rlg); }
.card-desc { font-size: 12.5px; color: var(--t3); }
.card-list { list-style: none; display: flex; flex-direction: column; gap: 2px; border-top: 1px solid var(--bd); padding-top: 10px; }
.card-list li { position: relative; z-index: 1; }
.card-list a { display: block; font-size: 13px; color: var(--t2); padding: 3px 0 3px 14px; position: relative; line-height: 1.4; }
.card-list a::before { content: '›'; position: absolute; left: 0; color: var(--teal); }
.card-list a:hover { color: var(--teal); }
.card-more { position: relative; z-index: 1; font-size: 12.5px; font-weight: 600; margin-top: auto; }

/* ---- topic page ---- */
.phd { padding: 26px 40px 0; background: var(--ink2); border-bottom: 1px solid var(--bd); }
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 12.5px; color: var(--t3); margin-bottom: 14px; list-style: none; }
.crumbs a { color: var(--t3); }
.crumbs a:hover { color: var(--teal); }
.crumbs li + li::before { content: '›'; color: var(--t4); margin-right: 6px; }
.ptitle { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.ptitle .card-ico { width: 50px; height: 50px; font-size: 24px; border-radius: 14px; }
.ptitle h1 { font-size: 25px; font-weight: 800; }
.ptitle p { font-size: 13.5px; color: var(--t3); margin-top: 2px; }
.tabs { display: flex; overflow-x: auto; scrollbar-width: none; border-top: 1px solid var(--bd); margin: 0 -40px; padding: 0 40px; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { padding: 12px 16px; font-size: 13px; font-weight: 600; color: var(--t3); border-bottom: 2px solid transparent; white-space: nowrap; }
.tabs a:hover { color: var(--t2); text-decoration: none; }
.tabs a.on { color: var(--teal); border-bottom-color: var(--teal); }
.list { padding: 24px 40px 40px; max-width: 980px; }
.group { margin-bottom: 26px; scroll-margin-top: calc(var(--hh) + 12px); }
.glbl { display: flex; align-items: center; gap: 10px; font: 700 11px var(--fd); letter-spacing: 1.5px; text-transform: uppercase; color: var(--t3); margin-bottom: 10px; }
.glbl::after { content: ''; flex: 1; height: 1px; background: var(--bd); }
.faq { background: var(--ink2); border: 1px solid var(--bd); border-radius: var(--r); margin-bottom: 6px; }
.faq:hover { border-color: var(--bd2); }
.faq[open] { border-color: rgba(0, 200, 150, .3); }
.faq.feat { border-color: rgba(0, 200, 150, .2); }
.faq > summary { list-style: none; cursor: pointer; display: flex; align-items: flex-start; gap: 12px; padding: 15px 18px; }
.faq > summary::-webkit-details-marker { display: none; }
.faq-q { flex: 1; font-size: 15px; font-weight: 600; line-height: 1.45; }
.faq-star { color: var(--teal); font-size: 11px; margin-top: 4px; }
.meta { display: flex; flex-wrap: wrap; gap: 6px 12px; margin-top: 5px; font-size: 11.5px; color: var(--t3); font-weight: 400; }
.tag { font-size: 10.5px; background: var(--ink3); border: 1px solid var(--bd); color: var(--t3); padding: 1px 8px; border-radius: 20px; }
.chev { width: 28px; height: 28px; border-radius: 7px; background: var(--ink3); border: 1px solid var(--bd); display: grid; place-items: center; color: var(--t3); transition: transform .2s; flex-shrink: 0; }
.faq[open] .chev { transform: rotate(180deg); color: var(--teal); }
.faq-a { padding: 0 18px 18px 18px; border-top: 1px solid var(--bd); }
.faq-a p { color: var(--t2); margin: 14px 0; white-space: pre-line; }
.readmore { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; padding: 7px 14px; border-radius: var(--rsm);
  border: 1px solid rgba(0, 200, 150, .25); background: rgba(0, 200, 150, .07); }
.readmore:hover { background: rgba(0, 200, 150, .14); text-decoration: none; }

/* ---- article ---- */
.art-wrap { display: flex; align-items: flex-start; }
.art { flex: 1; min-width: 0; padding: 26px 40px 48px; max-width: 860px; }
.art h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 800; letter-spacing: -.3px; margin-bottom: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: var(--ink3); border: 1px solid var(--bd); border-radius: 30px; padding: 4px 12px; font-size: 12px; color: var(--t2); }
.chip svg.i { width: 12px; height: 12px; color: var(--teal); }
.listen { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--ink2); border: 1px solid var(--bd); border-radius: var(--r); margin-bottom: 20px; }
.lp { width: 38px; height: 38px; border-radius: 50%; background: var(--ink4); border: 1px solid var(--bd); display: grid; place-items: center; color: var(--t1); }
.lp.playing { background: var(--teal); color: #000; border-color: var(--teal); }
.lp svg { width: 15px; height: 15px; fill: currentColor; stroke: none; }
.l-track { flex: 1; min-width: 0; }
.l-top { display: flex; justify-content: space-between; font-size: 11.5px; margin-bottom: 5px; }
.l-status { color: var(--teal); font-weight: 600; }
.l-time { color: var(--t3); }
.l-rail { height: 4px; background: var(--ink4); border-radius: 4px; overflow: hidden; }
.l-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--blue)); transition: width .4s linear; }
.l-stop { width: 30px; height: 30px; border-radius: 8px; background: rgba(239, 68, 68, .1); border: 1px solid rgba(239, 68, 68, .25); color: var(--red); display: grid; place-items: center; }
.l-stop svg { width: 11px; height: 11px; fill: currentColor; stroke: none; }
.summary { background: rgba(0, 200, 150, .06); border: 1px solid rgba(0, 200, 150, .18); border-radius: var(--r); padding: 14px 16px; margin-bottom: 22px; }
.summary b { display: block; font: 700 10.5px var(--fd); letter-spacing: 1.5px; text-transform: uppercase; color: var(--teal); margin-bottom: 4px; }
.summary p { color: var(--t2); white-space: pre-line; }
.body { color: var(--t2); font-size: 15.5px; line-height: 1.8; }
.body > * + * { margin-top: 12px; }
.body h2, .body h3, .body h4 { color: var(--t1); margin-top: 26px; scroll-margin-top: calc(var(--hh) + 12px); }
.body h2 { font-size: 20px; }
.body h3 { font-size: 17px; }
.body h4 { font-size: 15px; }
.body ul, .body ol { padding-left: 22px; }
.body li + li { margin-top: 4px; }
.body strong { color: var(--t1); }
.body code, .body kbd { font-size: .9em; background: var(--ink3); border: 1px solid var(--bd); border-radius: 5px; padding: 1px 6px; }
.body blockquote { background: rgba(0, 200, 150, .06); border-left: 3px solid var(--teal); border-radius: 0 var(--rsm) var(--rsm) 0; padding: 12px 16px; font-size: 14.5px; }
.body blockquote > * + * { margin-top: 6px; }
.body table { width: 100%; border-collapse: collapse; font-size: 14px; display: block; overflow-x: auto; }
.body th, .body td { border: 1px solid var(--bd2); padding: 8px 10px; text-align: left; vertical-align: top; }
.body th { background: var(--ink3); color: var(--t1); }
.body img { max-width: 100%; height: auto; border-radius: var(--r); border: 1px solid var(--bd); }
.body iframe { width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: var(--r); }
.body hr { border: 0; border-top: 1px solid var(--bd2); margin: 22px 0; }
.src { margin-top: 18px; font-size: 13px; color: var(--t3); }
.box { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--bd); }
.box h2 { font: 700 11px var(--fd); letter-spacing: 1.5px; text-transform: uppercase; color: var(--t3); margin-bottom: 12px; }
.helpful { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.helpful > span { font-weight: 600; color: var(--t2); }
.hbtn { padding: 7px 16px; border-radius: var(--rsm); border: 1px solid var(--bd2); background: var(--ink3); color: var(--t2); font-size: 13px; font-weight: 600; }
.hbtn.yes:hover, .hbtn.yes[aria-pressed='true'] { background: rgba(34, 197, 94, .12); border-color: rgba(34, 197, 94, .35); color: var(--grn); }
.hbtn.no:hover, .hbtn.no[aria-pressed='true'] { background: rgba(239, 68, 68, .12); border-color: rgba(239, 68, 68, .3); color: var(--red); }
.fb-more { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; max-width: 560px; }
.fb-more textarea { background: var(--ink2); border: 1px solid var(--bd2); border-radius: var(--rsm); padding: 10px 12px; resize: vertical; min-height: 80px; outline: none; }
.fb-more textarea:focus { border-color: var(--teal); }
.fb-note { font-size: 12px; color: var(--t3); }
.btn { align-self: flex-start; padding: 8px 18px; background: var(--teal); color: #000; border-radius: var(--rsm); font-size: 13px; font-weight: 700; }
.btn:hover { background: var(--teal2); text-decoration: none; }
.thanks { color: var(--teal); font-weight: 500; font-size: 14px; }
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; }
.rel { background: var(--ink3); border: 1px solid var(--bd); border-radius: var(--rsm); padding: 10px 12px; color: var(--t1); font-size: 13px; font-weight: 500; line-height: 1.4; display: flex; gap: 8px; }
.rel:hover { border-color: rgba(0, 200, 150, .3); background: var(--ink4); text-decoration: none; }
.rel span { color: var(--teal); }
.help-card { margin-top: 26px; display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(0, 200, 150, .09), rgba(59, 130, 246, .07)); border: 1px solid var(--bd3); border-radius: var(--rlg); padding: 18px 20px; }
.help-card b { font-family: var(--fd); font-size: 16px; }
.help-card p { color: var(--t3); font-size: 13px; }
.toc { width: 230px; flex-shrink: 0; position: sticky; top: calc(var(--hh) + 20px); padding: 26px 20px 20px 0; max-height: calc(100vh - var(--hh) - 40px); overflow-y: auto; }
.toc h2 { font: 700 10px var(--fd); letter-spacing: 1.5px; text-transform: uppercase; color: var(--t3); margin-bottom: 10px; }
.toc a { display: block; font-size: 12.5px; color: var(--t3); padding: 5px 0 5px 12px; border-left: 2px solid var(--bd); line-height: 1.4; }
.toc a.d3 { padding-left: 24px; }
.toc a:hover { color: var(--teal); border-left-color: var(--teal); text-decoration: none; }

/* ---- search page ---- */
.page-search { margin: 0 0 18px; max-width: 640px; }
.nf-search { max-width: 520px; margin: 22px auto 0; }
.msearch { display: none; width: 38px; height: 38px; border-radius: var(--rsm); border: 1px solid var(--bd2); align-items: center; justify-content: center; color: var(--t2); }
.results { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.result { display: block; background: var(--ink2); border: 1px solid var(--bd); border-radius: var(--r); padding: 14px 18px; color: var(--t1); }
.result:hover { border-color: rgba(0, 200, 150, .3); text-decoration: none; }
.result .sd-s { -webkit-line-clamp: 3; margin-top: 3px; }
.notice { background: var(--ink2); border: 1px solid var(--bd2); border-radius: var(--r); padding: 16px 18px; color: var(--t2); margin-bottom: 16px; }

/* ---- footer / misc ---- */
.foot { padding: 22px 40px; border-top: 1px solid var(--bd); color: var(--t3); font-size: 12.5px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.empty { padding: 60px 20px; text-align: center; color: var(--t3); }
.empty h1 { color: var(--t1); font-size: 26px; margin-bottom: 8px; }
.toast { position: fixed; bottom: 20px; right: 20px; background: var(--ink3); border: 1px solid var(--teal); color: var(--teal); border-radius: var(--r); padding: 11px 18px; font-size: 13px; z-index: 90; }

/* ---- responsive ---- */
@media (max-width: 1100px) { .toc { display: none; } }
@media (max-width: 900px) {
  .hero, .sec, .list, .art, .foot { padding-left: 20px; padding-right: 20px; }
  .phd { padding: 20px 20px 0; }
  .tabs { margin: 0 -20px; padding: 0 20px; }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .topbar { padding: 0 12px; }
  .topbar .tsearch { display: none; }
  .msearch { display: flex; }
  .logo { margin-right: auto; }
  .wrap { background: none; }
  .sidebar { position: fixed; left: 0; top: var(--hh); bottom: 0; height: auto; width: min(300px, 85vw); z-index: 45; transform: translateX(-100%); transition: transform .25s; }
  body.nav-open .sidebar { transform: none; }
  body.nav-open .overlay { display: block; position: fixed; inset: var(--hh) 0 0 0; background: rgba(0, 0, 0, .55); z-index: 40; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--bd); }
  .cards { grid-template-columns: 1fr; }
  .pills { flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start; padding-bottom: 4px; scrollbar-width: none; }
  .hero { padding-top: 36px; }
  .tbtn .lbl { display: none; }
}