:root{
  --navy:#002c81; --blue:#004a93; --blue2:#0a74d8; --sky:#76b2e2; --mist:#eaf3fc;
  --bg:#f2f6fb; --card:#fff; --ink:#0b1f3a; --mute:#5b6b83; --line:#e0e8f3;
  --ok:#0a7d3b; --warn:#a15c00; --bad:#b42318;
  --r:18px; --shadow:0 1px 2px rgba(0,44,129,.06),0 8px 28px rgba(0,44,129,.08);
  --shadow-lg:0 2px 4px rgba(0,44,129,.08),0 18px 48px rgba(0,44,129,.16);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 "Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:14px;height:64px}
.topbar .logo{height:38px;display:block}
.vr{width:1px;height:26px;background:var(--line)}
.crumb{display:flex;align-items:center;gap:10px;font-weight:600;min-width:0}
.crumb img{width:30px;height:30px;border-radius:8px;flex:none}
.crumb span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.back,.signout{white-space:nowrap}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;font-size:14px;padding:7px 12px;border-radius:999px;background:var(--mist);transition:.15s}
.back:hover{background:#d9eafa}
.sp{flex:1}
.user{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--mute)}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--blue2),var(--navy));color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px}
.signout{font-size:14px;font-weight:600;color:var(--blue);padding:7px 12px;border-radius:999px;transition:.15s}
.signout:hover{background:var(--mist)}

/* ---------- buttons / inputs ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 22px;font-weight:650;color:#fff;background:linear-gradient(135deg,var(--blue2),var(--blue) 60%,var(--navy));box-shadow:0 6px 16px rgba(0,74,147,.28);transition:transform .15s,box-shadow .15s,opacity .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(0,74,147,.34)}
.btn:disabled{opacity:.6;transform:none;cursor:default}
.btn.ghost{background:var(--mist);color:var(--blue);box-shadow:none}
.btn.ghost:hover{background:#d9eafa}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.02em;border-radius:999px;padding:3px 10px}
.tag.live{background:#e5f6ec;color:var(--ok)}
.tag.live::before{content:"";width:7px;height:7px;border-radius:50%;background:#18b560;box-shadow:0 0 0 0 rgba(24,181,96,.6);animation:pulse 2s infinite}
.tag.soon{background:#eef1f6;color:var(--mute)}
@keyframes pulse{70%{box-shadow:0 0 0 7px rgba(24,181,96,0)}100%{box-shadow:0 0 0 0 rgba(24,181,96,0)}}

/* ---------- login ---------- */
.login-bg{min-height:100vh;display:grid;place-items:center;padding:24px;position:relative;overflow:hidden;
  background:radial-gradient(1200px 600px at 12% -10%,rgba(118,178,226,.55),transparent 60%),radial-gradient(900px 600px at 100% 110%,rgba(10,116,216,.7),transparent 60%),linear-gradient(160deg,#001d5c,#003c8a 55%,#0a5fb8)}
.login-bg::before{content:"";position:absolute;inset:0;opacity:.18;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000,transparent 70%);mask-image:radial-gradient(circle at 50% 40%,#000,transparent 70%)}
.rails{position:absolute;left:0;right:0;bottom:-40px;height:220px;opacity:.28;pointer-events:none}
.login-card{position:relative;width:100%;max-width:420px;background:#fff;border-radius:24px;padding:36px 34px 28px;box-shadow:0 30px 80px rgba(0,10,50,.45);animation:rise .6s cubic-bezier(.2,.8,.2,1)}
@keyframes rise{from{opacity:0;transform:translateY(18px) scale(.98)}to{opacity:1;transform:none}}
.login-card .logo{display:block;height:74px;margin:0 auto 6px}
.login-card h1{font-size:23px;margin:14px 0 4px;text-align:center;letter-spacing:-.01em}
.login-card .lead{margin:0 0 22px;text-align:center;color:var(--mute);font-size:15px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:650;color:#33445f;margin:0 0 6px}
.input{position:relative}
.input svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:#8aa0bd}
.input input{width:100%;font:inherit;padding:13px 14px 13px 44px;border:1.5px solid var(--line);border-radius:12px;background:#f8fafd;color:var(--ink);transition:.15s;outline:none}
.input input:focus{border-color:var(--blue2);background:#fff;box-shadow:0 0 0 4px rgba(10,116,216,.14)}
.login-card .btn{width:100%;margin-top:6px;padding:14px}
.err{background:#fdecea;color:var(--bad);border-radius:10px;padding:10px 12px;font-size:14px;margin-bottom:14px}
.fine{margin-top:18px;text-align:center;font-size:12.5px;color:#7b8aa1}
.login-foot{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:rgba(255,255,255,.7);font-size:12.5px}

/* ---------- home (app store) ---------- */
.hero{background:radial-gradient(900px 400px at 85% -20%,rgba(118,178,226,.55),transparent 60%),linear-gradient(150deg,#001d5c,#003c8a 60%,#0a5fb8);color:#fff;padding:46px 0 96px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;opacity:.12;background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 70%);mask-image:linear-gradient(90deg,transparent,#000 70%)}
.hero .wrap{position:relative}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--sky)}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.1;margin:10px 0 12px;letter-spacing:-.02em}
.hero p{margin:0;max-width:640px;color:#cfe0f5;font-size:18px}
.search{margin-top:26px;position:relative;max-width:520px}
.search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:19px;height:19px;color:#8aa0bd}
.search input{width:100%;font:inherit;padding:14px 16px 14px 46px;border:0;border-radius:14px;background:#fff;color:var(--ink);box-shadow:0 10px 30px rgba(0,10,50,.3);outline:none}
.featured{margin-top:-62px;position:relative;background:#fff;border-radius:24px;box-shadow:var(--shadow-lg);padding:26px;display:grid;grid-template-columns:auto 1fr auto;gap:26px;align-items:center;border:1px solid var(--line)}
.featured .icon{width:112px;height:112px;border-radius:26px;box-shadow:0 14px 30px rgba(0,60,140,.35)}
.featured h2{margin:6px 0 6px;font-size:26px;letter-spacing:-.01em}
.featured p{margin:0 0 12px;color:var(--mute);max-width:620px}
.stats{display:flex;flex-wrap:wrap;gap:8px}
.stat{font-size:13px;font-weight:600;color:var(--blue);background:var(--mist);border-radius:999px;padding:5px 12px}
.featured .btn{padding:15px 30px;font-size:16px}
.sec{display:flex;align-items:end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:44px 0 16px}
.sec h3{margin:0;font-size:22px;letter-spacing:-.01em}
.sec small{color:var(--mute);font-size:14px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;color:#33445f;border-radius:999px;padding:6px 14px;font-size:14px;font-weight:600;transition:.15s}
.chip:hover{border-color:var(--blue2);color:var(--blue)}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;padding-bottom:20px}
.app{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);text-align:left;display:flex;flex-direction:column;gap:12px;transition:transform .18s,box-shadow .18s,border-color .18s;color:inherit;position:relative}
.app:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#c9daef}
.app .top{display:flex;align-items:flex-start;justify-content:space-between}
.tile{width:56px;height:56px;border-radius:15px;display:grid;place-items:center;color:#fff;box-shadow:0 8px 18px rgba(0,40,120,.22)}
.tile svg{width:28px;height:28px}
.app h4{margin:2px 0 0;font-size:17px;letter-spacing:-.005em}
.app p{margin:0;color:var(--mute);font-size:14.5px;flex:1}
.app .cat{font-size:12.5px;color:#8091aa;font-weight:600}
.empty{padding:30px;text-align:center;color:var(--mute);display:none}
.cta{margin:20px 0 56px;border-radius:24px;padding:30px 32px;color:#fff;background:linear-gradient(135deg,#0a5fb8,#002c81);display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.cta h3{margin:0 0 4px;font-size:21px}
.cta p{margin:0;color:#cfe0f5;max-width:640px}
.cta .btn{background:#fff;color:var(--blue);box-shadow:none}
/* modal */
.scrim{position:fixed;inset:0;background:rgba(2,16,48,.55);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:20px;z-index:50}
.scrim.on{display:flex}
.sheet{background:#fff;border-radius:24px;max-width:600px;width:100%;max-height:90vh;overflow:auto;padding:28px;box-shadow:0 30px 80px rgba(0,10,50,.5);animation:rise .35s cubic-bezier(.2,.8,.2,1)}
.sheet .head{display:flex;gap:16px;align-items:center;margin-bottom:14px}
.sheet h4{margin:0;font-size:22px}
.sheet .x{margin-left:auto;border:0;background:var(--mist);color:var(--blue);width:36px;height:36px;border-radius:50%;font-size:20px;line-height:1}
.sheet h5{margin:18px 0 6px;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute)}
.sheet p{margin:0;color:#2b3b55}
.mock{background:#f5f8fc;border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-size:14.5px}
.mock .q{font-weight:650;color:var(--blue);margin-bottom:6px}
.mock .a{color:#2b3b55}

/* ---------- Q&A app ---------- */
.ask-hero{margin-top:22px;border-radius:26px;padding:30px 30px 30px;color:#fff;position:relative;overflow:hidden;
  background:radial-gradient(700px 300px at 90% -30%,rgba(118,178,226,.55),transparent 60%),linear-gradient(150deg,#001d5c,#003c8a 60%,#0a5fb8);box-shadow:var(--shadow-lg)}
.ask-hero h1{margin:0 0 6px;font-size:clamp(24px,4vw,34px);letter-spacing:-.02em;display:flex;align-items:center;gap:14px;line-height:1.15}
.ask-hero h1 img{width:50px;height:50px;border-radius:14px;box-shadow:0 8px 20px rgba(0,0,0,.3);flex:none}
.ask-hero .sub{margin:0 0 20px;color:#cfe0f5;max-width:700px}
.askform{display:flex;gap:10px;background:#fff;border-radius:16px;padding:7px;box-shadow:0 14px 34px rgba(0,10,50,.35)}
.askform input{flex:1;min-width:0;font:inherit;font-size:17px;border:0;outline:none;padding:12px 14px;color:var(--ink);background:transparent}

.sec2{margin:30px 0 12px}
.sec2 h2{margin:0;font-size:19px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sec2 p{margin:4px 0 0;color:var(--mute);font-size:14.5px}
.count{font-size:12.5px;font-weight:700;color:var(--blue);background:var(--mist);border-radius:999px;padding:3px 11px}

.ex{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.ex button{position:relative;text-align:left;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:14px;padding:13px 14px 13px 48px;line-height:1.35;font-size:15px;box-shadow:var(--shadow);transition:.15s}
.ex button::before{content:"?";position:absolute;left:13px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--mist);color:var(--blue);font-weight:800;font-size:14px;display:grid;place-items:center}
.ex button:hover{border-color:var(--blue2);transform:translateY(-2px);box-shadow:var(--shadow-lg)}

.docs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.docard{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);cursor:pointer;text-align:left;padding:0;display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s;color:inherit}
.docard:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.cover{position:relative;height:150px;background:#eef3fa;overflow:hidden;border-bottom:1px solid var(--line)}
.cover img{width:100%;height:100%;object-fit:cover;object-position:top;display:block}
.badge{position:absolute;left:10px;top:10px;font-size:11.5px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--blue2),var(--navy));border-radius:8px;padding:3px 9px;box-shadow:0 4px 10px rgba(0,30,100,.35)}
.pdf{position:absolute;right:10px;bottom:10px;font-size:10.5px;font-weight:800;letter-spacing:.06em;color:#c0392b;background:#fff;border-radius:6px;padding:2px 7px;box-shadow:0 2px 6px rgba(0,0,0,.18)}
.dbody{padding:11px 13px 13px;display:flex;flex-direction:column;gap:2px;flex:1}
.dissuer{font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--blue2)}
.dtitle{font-weight:700;font-size:14.5px;line-height:1.3}
.dmeta{font-size:12.5px;color:var(--mute)}
.dpages{margin-top:auto;padding-top:6px;font-size:12.5px;font-weight:700;color:#41526d}
.dnote{margin-top:6px;font-size:11.5px;font-weight:700;color:var(--warn);background:#fff4e0;border-radius:6px;padding:2px 8px;align-self:flex-start}

.entry{margin-top:22px;animation:rise .4s cubic-bezier(.2,.8,.2,1)}
.qbubble{display:flex;justify-content:flex-end;margin-bottom:10px}
.qbubble span{background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;border-radius:18px 18px 4px 18px;padding:10px 16px;max-width:85%;font-weight:550;overflow-wrap:anywhere}
.acard{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;box-shadow:var(--shadow)}
.arow{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.verdict{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;border-radius:999px;padding:4px 11px}
.verdict.ok{background:#e5f6ec;color:var(--ok)} .verdict.no{background:#fdecea;color:var(--bad)} .verdict.warn{background:#fff4e0;color:var(--warn)}
.copy{border:0;background:var(--mist);color:var(--blue);font-size:12.5px;font-weight:700;border-radius:999px;padding:5px 12px}
.copy:hover{background:#d9eafa}
.ans{font-size:17.5px;line-height:1.65;overflow-wrap:anywhere}
.ans p{margin:0 0 .6em}.ans p:last-child{margin:0}
.ans ul{margin:.2em 0 .6em;padding-left:1.2em}.ans li{margin:.2em 0}
.ans .ref{font-weight:700;color:var(--blue)}
.note{font-size:13.5px;color:var(--warn);margin-top:12px;background:#fff8ec;border-radius:10px;padding:9px 12px}
.src{margin:20px 0 10px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);font-weight:700}
.srcpills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.srcpill{border:1px solid #c9daef;background:var(--mist);color:var(--blue);font-weight:700;font-size:13px;border-radius:999px;padding:5px 12px}
.srcpill:hover{background:#d9eafa}
.pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.pg{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;cursor:pointer;transition:.18s;box-shadow:var(--shadow)}
.pg:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.pg.cited{border-color:var(--blue2);box-shadow:0 0 0 2px rgba(10,116,216,.25),var(--shadow)}
.pg img{width:100%;height:220px;object-fit:cover;object-position:top;display:block;background:#fff;border-bottom:1px solid var(--line)}
.pg .m{padding:10px 12px;font-size:12.5px;color:var(--mute)}
.pg .m b{display:block;color:var(--ink);font-size:13.5px;line-height:1.3;margin-bottom:3px}
.v{color:var(--ok);font-weight:700}.u{color:var(--warn);font-weight:700}
.skel{height:14px;border-radius:7px;background:linear-gradient(90deg,#eaf0f8,#f6f9fd,#eaf0f8);background-size:200% 100%;animation:sh 1.2s infinite;margin:10px 0}
@keyframes sh{to{background-position:-200% 0}}
.status{font-size:14px;color:var(--blue);font-weight:600}
.foot{margin:36px 0 50px;text-align:center;font-size:12.5px;color:#7b8aa1;line-height:1.6}

/* page viewer */
#viewer{position:fixed;inset:0;background:rgba(2,16,48,.82);backdrop-filter:blur(4px);display:none;flex-direction:column;z-index:60}
#viewer.on{display:flex}
.vbar{display:flex;align-items:center;gap:10px;padding:10px 14px;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.25)}
.vbar .ttl{flex:1;min-width:0;font-weight:700;font-size:14.5px;line-height:1.25}
.vbar .ttl small{display:block;font-weight:600;color:var(--mute);font-size:12.5px}
.vbtn{border:0;background:var(--mist);color:var(--blue);width:42px;height:42px;border-radius:50%;font-size:20px;line-height:1;flex:none;display:grid;place-items:center}
.vbtn:hover{background:#d9eafa}.vbtn:disabled{opacity:.35}
.vbody{flex:1;overflow:auto;padding:18px 12px 40px;text-align:center;-webkit-overflow-scrolling:touch}
.vbody img{width:100%;max-width:940px;background:#fff;border-radius:8px;box-shadow:0 30px 80px rgba(0,0,0,.5)}

@media (max-width:760px){
  .wrap{padding:0 14px}
  .featured{grid-template-columns:1fr;text-align:left;padding:20px}
  .featured .icon{width:84px;height:84px}
  .featured .btn{width:100%}
  .hero{padding:34px 0 84px}
  .user .who{display:none}
  .topbar .wrap{height:58px;gap:10px}
  .topbar .logo{height:32px}
  .topbar .vr,.crumb{display:none}
  .signout{padding:7px 8px}
  .back{padding:9px 13px}
  .ask-hero{margin-top:14px;border-radius:22px;padding:22px 16px 18px}
  .ask-hero h1{font-size:23px;gap:11px}
  .ask-hero h1 img{width:42px;height:42px;border-radius:12px}
  .ask-hero .sub{font-size:15px;margin-bottom:16px}
  .askform{flex-direction:column;padding:8px}
  .askform input{padding:12px 10px;font-size:16px}
  .askform .btn{width:100%}
  .ex{display:flex;overflow-x:auto;margin:0 -14px;padding:2px 14px 12px;gap:10px;scroll-snap-type:x proximity;scrollbar-width:none}
  .ex::-webkit-scrollbar,.docs::-webkit-scrollbar{display:none}
  .ex button{flex:none;width:236px;scroll-snap-align:start;font-size:14px}
  .docs{display:flex;overflow-x:auto;margin:0 -14px;padding:2px 14px 12px;gap:12px;scroll-snap-type:x proximity;scrollbar-width:none}
  .docard{flex:none;width:160px;scroll-snap-align:start}
  .cover{height:120px}
  .acard{padding:16px}
  .ans{font-size:16.5px}
  .qbubble span{max-width:92%}
  .pages{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .pg img{height:150px}
  .login-card{padding:30px 22px 22px}
  .cta{padding:24px 20px}
  .cta .btn{width:100%}
  .sec2{margin-top:24px}
}
@media (min-width:761px) and (max-width:1000px){
  .docs{grid-template-columns:repeat(3,minmax(0,1fr))}
}