/* Layout: app shell with a left module rail (desktop) / bottom tab bar (phone); content in panels on a soft field.
   Palette and radius follow the user's SAS AI Assistant V5.2 design system. */
:root{
  --bg:#f4f6fb;--panel:#ffffff;--panel2:#f5f7fc;--text:#0b1530;--muted:#57627a;--line:#e3e8f3;--line2:#d0d8ea;
  --primary:#2754c5;--primary2:#3b82f6;--accent:#0d9488;--on-primary:#ffffff;--soft:#e3ebff;
  --green:#047857;--green-bg:#e2f6ee;--red:#d12f4a;--red-bg:#fdecef;--amber:#b45309;--amber-bg:#fff4dd;
  --ink-case:#eff3fc;--radius:20px;--opt-text:#1e293b;--meta:#64748b;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 14px 34px -10px rgba(30,41,80,.16);
  --shadow-sm:0 1px 2px rgba(16,24,40,.05),0 3px 10px -4px rgba(30,41,80,.08);
  --glass:rgba(255,255,255,.74);--glow:rgba(59,130,246,.10);--glow2:rgba(124,58,237,.05);
  --cbt-head:#1b2a44;--cbt-accent:#2667b5;
  --font:"Inter","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;--mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --display:"Plus Jakarta Sans","Inter","Segoe UI",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#080e1c;--panel:#0f172b;--panel2:#141f38;--text:#eef2fb;--muted:#9eaac4;--line:#212d48;--line2:#2d3b5c;
  --primary:#7aa2ff;--primary2:#93b4ff;--accent:#2dd4bf;--on-primary:#0b1020;--soft:#162447;
  --green:#3fd3a0;--green-bg:#0f2e25;--red:#ff7d8e;--red-bg:#3a1520;--amber:#f2b64a;--amber-bg:#33270e;
  --ink-case:#121c35;--opt-text:#e2e8f0;--meta:#94a3b8;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 18px 40px -12px rgba(0,0,0,.55);--shadow-sm:0 1px 2px rgba(0,0,0,.28),0 4px 12px -6px rgba(0,0,0,.4);
  --glass:rgba(16,23,42,.72);--glow:rgba(122,162,255,.12);--glow2:rgba(167,139,250,.05);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#080e1c;--panel:#0f172b;--panel2:#141f38;--text:#eef2fb;--muted:#9eaac4;--line:#212d48;--line2:#2d3b5c;
  --primary:#7aa2ff;--primary2:#93b4ff;--accent:#2dd4bf;--on-primary:#0b1020;--soft:#162447;
  --green:#3fd3a0;--green-bg:#0f2e25;--red:#ff7d8e;--red-bg:#3a1520;--amber:#f2b64a;--amber-bg:#33270e;
  --ink-case:#121c35;--opt-text:#e2e8f0;--meta:#94a3b8;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 18px 40px -12px rgba(0,0,0,.55);--shadow-sm:0 1px 2px rgba(0,0,0,.28),0 4px 12px -6px rgba(0,0,0,.4);
  --glass:rgba(16,23,42,.72);--glow:rgba(122,162,255,.12);--glow2:rgba(167,139,250,.05);color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--text);font:15px/1.55 var(--font)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--panel)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--primary)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.muted{color:var(--muted)}
.mono,.num{font-variant-numeric:tabular-nums}
.mono{font-family:var(--mono)}

/* shell */
.shell{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:100vh}
.side{position:sticky;top:0;height:100vh;padding:20px 14px;border-right:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;gap:18px}
.brand{display:flex;gap:10px;align-items:center;padding:4px 6px}
.brand b{display:block;font-size:16px}.brand small{color:var(--muted);font-size:12px}
.wordmark{letter-spacing:-.01em;font-weight:800}.wordmark span{color:var(--primary)}
.logo{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:12px;letter-spacing:.04em;
  color:#fff;background:linear-gradient(135deg,var(--primary2),var(--primary))}
.side-nav{display:flex;flex-direction:column;gap:3px}
.nav-btn{display:flex;align-items:center;gap:10px;width:100%;text-align:left;border:0;background:transparent;padding:10px 12px;border-radius:12px;color:var(--muted);font-weight:600}
.nav-btn:hover{background:var(--panel2);color:var(--text)}
.nav-btn.on{background:var(--soft);color:var(--primary)}
.nav-btn .ico{width:22px;text-align:center}
.nav-btn .count{margin-left:auto;font-size:11px;background:var(--primary);color:var(--on-primary);border-radius:999px;padding:1px 7px}
.side-note{margin-top:auto;font-size:11.5px;color:var(--muted);padding:0 6px}
.main{min-width:0;display:flex;flex-direction:column}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);padding-block:14px;
  padding-left:max(22px,env(safe-area-inset-left,0px));padding-right:max(22px,env(safe-area-inset-right,0px));border-bottom:1px solid var(--line)}
.top h1{margin:0;font-size:20px;letter-spacing:-.01em;text-wrap:balance}
.crumb{font-size:12px;color:var(--muted)}
.crumb a{cursor:pointer;text-decoration:none}
.top-actions{display:flex;gap:8px}
.icon-btn,.avatar{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:var(--panel);font-weight:700}
.avatar{background:linear-gradient(135deg,var(--primary2),var(--primary));color:#fff;border:0}
#view{padding-block:20px 90px;padding-left:max(22px,env(safe-area-inset-left,0px));padding-right:max(22px,env(safe-area-inset-right,0px));max-width:1180px;width:100%;outline:none}
.tabbar{display:none}

/* building blocks */
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;min-width:0}
.panel.flat{box-shadow:none}
.panel.raised{box-shadow:var(--shadow)}
.panel h2,.panel h3{margin:0 0 6px;text-wrap:balance}
.panel h2{font-size:18px}.panel h3{font-size:15.5px}
.sec-title{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin:22px 0 10px}
.sec-title h2{margin:0;font-size:16px}
.eyebrow{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700}
.hero{position:relative;overflow:hidden;border-radius:var(--radius);padding:24px;color:#fff;
  background:linear-gradient(145deg,#0a1633,#173a8a 58%,#3b82f6)}
.hero h2{margin:6px 0 6px;font-size:24px;letter-spacing:-.01em;text-wrap:balance}
.hero p{margin:0;color:#e1e6ff;max-width:62ch}
.hero .orb{position:absolute;border-radius:50%;opacity:.28;pointer-events:none}
.hero .o1{width:260px;height:260px;background:#60a5fa;right:-80px;top:-90px}
.hero .o2{width:180px;height:180px;background:#3dd6b7;right:120px;bottom:-110px}
.hero-row{position:relative;display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.stat b{display:block;font-size:24px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:12.5px}
.btn{border:0;background:linear-gradient(135deg,var(--primary2),var(--primary));color:#fff;padding:10px 16px;border-radius:12px;font-weight:700;
  box-shadow:0 8px 18px rgba(88,71,214,.24);transition:transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn[disabled]{opacity:.5;cursor:default;transform:none}
.btn.ghost{background:var(--panel);color:var(--text);border:1px solid var(--line);box-shadow:none}
.btn.small{padding:7px 12px;font-size:13.5px}
.btn.light{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);box-shadow:none}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.spacer{flex:1}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;padding:3px 9px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);font-weight:600}
.chip.lv{background:var(--soft);color:var(--primary);border-color:transparent}
.chip.ok{background:var(--green-bg);color:var(--green);border-color:transparent}
.chip.bad{background:var(--red-bg);color:var(--red);border-color:transparent}
.seg{display:inline-flex;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:3px;gap:3px;flex-wrap:wrap}
.seg button{border:0;background:transparent;padding:7px 13px;border-radius:9px;font-weight:600;color:var(--muted)}
.seg button.on{background:var(--panel);color:var(--primary);box-shadow:0 1px 4px rgba(20,30,60,.12)}
.bar{height:7px;border-radius:9px;background:var(--panel2);overflow:hidden;border:1px solid var(--line)}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary2),var(--primary))}
.paper-card{cursor:pointer;transition:border-color .15s,transform .15s}
.paper-card:hover{border-color:var(--primary);transform:translateY(-1px)}
.paper-card .code{font-weight:800;color:var(--primary);font-size:13px}
.lvl-line{display:grid;grid-template-columns:78px minmax(0,1fr) 44px;gap:8px;align-items:center;font-size:12.5px;color:var(--muted);margin-top:6px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:9px}
.tile{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:12px 8px;text-align:center;font-weight:700}
.tile small{display:block;font-weight:500;color:var(--muted);font-size:11.5px}
.tile:not([disabled]):hover{border-color:var(--primary)}
.tile[disabled]{opacity:.45;cursor:default}
.tile.done{border-color:var(--green)}
.field{display:flex;flex-direction:column;gap:5px;font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.field select,.field input,textarea{border:1px solid var(--line);background:var(--panel);border-radius:11px;padding:9px 11px;text-transform:none;letter-spacing:0;font-weight:500;font-size:14.5px}
textarea{width:100%;min-height:110px}
.form{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.empty{text-align:center;padding:30px 16px;color:var(--muted)}
.empty b{display:block;color:var(--text);font-size:16px;margin-bottom:4px}

/* question */
.qwrap{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:16px;align-items:start}
.qcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;min-width:0;box-shadow:var(--shadow)}
.qhead{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.case{background:var(--ink-case);border-radius:14px;padding:14px 16px;margin-bottom:14px;font-size:14.5px}
.case .case-title{font-weight:700;margin-bottom:4px}
.stem .situ{margin:0 0 8px;font-size:.88em;font-weight:400;color:var(--text)}
.case .case-ref{margin-top:8px;font-size:12px;color:var(--muted)}
.case.long .case-body{max-height:300px;overflow:auto}
.qno{font-size:12.5px;color:var(--muted);font-weight:600}
.stem{font-size:16px;font-weight:650;margin:6px 0 12px;line-height:1.5}
.stmts{margin:0 0 12px;padding-left:24px}
.stmts li{margin:3px 0}
.ar p{margin:6px 0}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start;text-align:left;border:1.5px solid var(--line);background:var(--panel);border-radius:14px;padding:11px 13px;transition:border-color .12s,background .12s}
.opt:hover:not([disabled]){border-color:var(--primary)}
.opt .let{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--panel2);font-weight:800;font-size:13px}
.opt.sel{border-color:var(--primary);background:var(--soft)}
.opt.ok{border-color:var(--green);background:var(--green-bg)}
.opt.ok .let{background:var(--green);color:#fff}
.opt.bad{border-color:var(--red);background:var(--red-bg)}
.opt.bad .let{background:var(--red);color:#fff}
.opt[disabled]{cursor:default}
.note{display:block;margin-top:6px;font-size:13.5px;color:var(--muted);line-height:1.5}
.opt.ok .note{color:var(--text)}
.callouts{display:grid;gap:10px;margin-top:14px}
.callout{border-radius:14px;padding:12px 14px;font-size:14px;border:1px solid var(--line);background:var(--panel2)}
.callout .cap{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;margin-bottom:3px}
.callout.trap{background:var(--amber-bg);border-color:transparent}.callout.trap .cap{color:var(--amber)}
.callout.tip{background:var(--green-bg);border-color:transparent}.callout.tip .cap{color:var(--green)}
.callout.verdict.ok{background:var(--green-bg);border-color:transparent}
.callout.verdict.bad{background:var(--red-bg);border-color:transparent}
.callout .src{font-size:12px;color:var(--muted);margin-top:5px}
details.more{margin-top:10px;font-size:14px}
details.more summary{cursor:pointer;font-weight:700;color:var(--primary)}
.qside{position:sticky;top:84px;display:grid;gap:12px}
.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.pal{height:34px;border-radius:9px;border:1px solid var(--line);background:var(--panel);font-weight:700;font-size:12.5px}
.pal.cur{outline:2px solid var(--primary);outline-offset:1px}
.pal.ans{background:var(--soft);color:var(--primary);border-color:transparent}
.pal.ok{background:var(--green-bg);color:var(--green);border-color:transparent}
.pal.bad{background:var(--red-bg);color:var(--red);border-color:transparent}
.pal.mark{box-shadow:inset 0 -3px 0 var(--amber)}
.timer{font-family:var(--mono);font-size:22px;font-weight:600}
.timer.low{color:var(--red)}
.qnav{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.kbd{font-family:var(--mono);font-size:11px;border:1px solid var(--line);border-radius:5px;padding:0 5px;color:var(--muted)}

/* simulator */
.sim{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:16px;align-items:start}
.dossier{position:sticky;top:84px}
.dossier .tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:-4px 0 10px}
.dossier .tabs button{border:0;background:transparent;padding:8px 12px;font-weight:700;color:var(--muted);border-bottom:2px solid transparent}
.dossier .tabs button.on{color:var(--primary);border-bottom-color:var(--primary)}
.doc-body{max-height:62vh;overflow:auto;font-size:14px}
.sent{display:inline;border-radius:5px;padding:1px 2px;cursor:pointer;transition:background .12s}
.sent:hover{background:var(--soft)}
.sent.hl{background:var(--amber-bg);box-shadow:inset 0 -2px 0 var(--amber)}
.fig{display:flex;gap:8px;padding:7px 0;border-bottom:1px dashed var(--line)}
.steps{display:grid;gap:12px}
.step-h{display:flex;align-items:center;gap:8px;font-weight:800;font-size:13px;color:var(--primary);text-transform:uppercase;letter-spacing:.06em}
.step-n{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--soft);font-size:12px}
.finding{border:1.5px dashed var(--primary);border-radius:var(--radius);padding:16px;background:var(--panel)}
.finding dt{font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--primary);margin-top:10px}
.finding dd{margin:2px 0 0}

/* trap matrix */
.trapword{background:var(--amber-bg);color:var(--amber);border-radius:4px;padding:0 3px;font-weight:800}
.streak{font-family:var(--mono);font-size:20px}

/* tables */
.tw{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
td.num,th.num{text-align:right}
pre.txt{white-space:pre-wrap;font:inherit;margin:0}
.loading{display:grid;place-items:center;gap:10px;padding:80px 0;color:var(--muted)}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--primary);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--text);color:var(--bg);padding:10px 16px;border-radius:12px;font-weight:600;transition:.2s;z-index:50;pointer-events:none}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.modal{position:fixed;inset:0;background:rgba(10,15,30,.5);display:grid;place-items:center;z-index:40;padding:16px}
.modal .panel{max-width:440px;width:100%;max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);overflow-y:auto;overscroll-behavior:contain}
body:has(.modal){overflow:hidden} /* the page behind a popup stays still; the popup scrolls instead */

@media (max-width:980px){
  .qwrap,.sim{grid-template-columns:minmax(0,1fr)}
  .qside,.dossier{position:static}
}
@media (max-width:820px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .side{display:none}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:25;background:var(--panel);border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom,0px);padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}
  .tabbar button{flex:1;border:0;background:transparent;padding:8px 2px 9px;font-size:11px;font-weight:700;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:2px}
  .tabbar button .ico{font-size:17px}
  .tabbar button.on{color:var(--primary)}
  .top h1{font-size:17px}
  .hero h2{font-size:20px}
  .stem{font-size:15px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------- freemium, accounts and study-app touches ---------- */
.pro-badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:800;letter-spacing:.06em;padding:2px 8px;border-radius:999px;
  color:#3b2a00;background:linear-gradient(135deg,#ffd76a,#f5b301)}
.tile.locked{background:var(--panel2);color:var(--muted);border-style:dashed}
.tile.locked:hover{border-color:#f5b301;color:var(--text)}
.locked-card{border-style:dashed;background:var(--panel2)}
.pro-nav{color:var(--amber)!important}
.pro-nav.on{background:var(--amber-bg)!important}
.avatar.is-pro{box-shadow:0 0 0 2px var(--panel),0 0 0 4px #f5b301}
.btn.big{padding:13px 20px;font-size:15.5px;width:100%}
.pro-banner{display:flex;flex-wrap:wrap;align-items:center;gap:14px;justify-content:space-between;margin-top:14px;border-radius:var(--radius);padding:18px 20px;color:#fff;
  background:linear-gradient(120deg,#0a1633,#2754c5 55%,#3b82f6)}
.pro-banner h3{margin:4px 0;font-size:17px;text-wrap:balance}
.pro-banner p{margin:0;color:#e3e0ff;font-size:13.5px;max-width:64ch}
.pro-banner .eyebrow{color:#ffd76a}
.next-card{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:14px;border-left:4px solid var(--primary)}
.stat.goal{display:flex;align-items:center;gap:12px}
.ring{flex:none}
.price-card .price{font-size:44px;font-weight:800;letter-spacing:-.03em;margin:6px 0 10px;font-variant-numeric:tabular-nums}
.price-card .cur{font-size:24px;vertical-align:super;margin-right:2px}
.price-card .per{font-size:15px;color:var(--muted);font-weight:600}
ul.ticks{list-style:none;padding:0;margin:0 0 14px;display:grid;gap:10px}
ul.ticks li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:4px 8px}
ul.ticks li::before{content:"✓";grid-row:span 2;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;background:var(--green-bg);color:var(--green)}
ul.ticks li span{grid-column:2;color:var(--muted);font-size:13.5px}
ul.ticks.small li{grid-template-columns:22px minmax(0,1fr)}
.paywall{max-width:460px}
.callout.pro-note{background:var(--amber-bg);border-color:transparent}
.chip.light{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);color:#fff}
.auth{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:16px;align-items:stretch}
.auth-art{position:relative;overflow:hidden;border-radius:var(--radius);padding:30px;color:#fff;background:linear-gradient(145deg,#071025,#173a8a 55%,#3b82f6);display:flex;align-items:center}
.auth-art h2{font-size:28px;line-height:1.15;margin:10px 0;text-wrap:balance}
.auth-art p{color:#e2e7ff;max-width:52ch}
.auth-art .orb{position:absolute;border-radius:50%;opacity:.3}
.auth-art .o1{width:300px;height:300px;background:#60a5fa;right:-110px;top:-90px}
.auth-art .o2{width:200px;height:200px;background:#3dd6b7;left:-80px;bottom:-80px}
.auth-card{align-self:center}
@media (max-width:820px){.auth{grid-template-columns:minmax(0,1fr)}.auth-art{padding:22px}.auth-art h2{font-size:22px}.price-card .price{font-size:36px}}

/* go deeper: Hinglish, basic example, source PDFs, videos, AI */
.callout.hi{background:var(--soft);border-color:transparent}.callout.hi .cap{color:var(--primary)}
.callout.ex{background:var(--panel);border-style:dashed}.callout.ex .cap{color:var(--muted)}
.learn{margin-top:12px;border:1px solid var(--line);border-radius:14px;padding:10px 12px;display:grid;gap:8px;background:var(--panel)}
.learn-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center;min-width:0}
.learn-row .eyebrow{margin-right:4px}
.learn-row .lbl{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--muted);min-width:78px}
.chip-btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:999px;padding:5px 11px;font-size:12.5px;font-weight:600}
.chip-btn:hover{border-color:var(--primary)}
.chip-btn.on{background:var(--soft);color:var(--primary);border-color:transparent}
.chip-btn.ai{color:var(--primary)}
.src-link,.vid-link{display:inline-flex;gap:8px;align-items:flex-start;max-width:100%;text-decoration:none;color:var(--text);border:1px solid var(--line);
  border-radius:12px;padding:6px 10px;font-size:13px;background:var(--panel2);min-width:0}
.src-link small,.vid-link small{display:block;color:var(--muted);font-size:11.5px}
.src-link:hover,.vid-link:hover{border-color:var(--primary)}
.src-link.off{border-style:dashed;cursor:default}.src-link.off:hover{border-color:var(--line)}
.src-link{flex-direction:column;gap:0}
.vid-link .play{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font-size:10px;margin-top:1px}
.vid-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:8px}
.pdf-card{text-decoration:none;color:var(--text)}
.seg.wrap{flex-wrap:wrap}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0}
/* AI mode: the answer under the question */
.chip-btn.ai-go{color:var(--on-primary);background:linear-gradient(135deg,var(--primary),var(--primary2));border-color:transparent}
.chip-btn.ai-go[aria-expanded="true"]{box-shadow:0 0 0 3px var(--soft)}
.ai-inline{margin-top:4px;border:1px solid var(--line);border-left:3px solid var(--primary);border-radius:14px;padding:12px 14px;background:var(--panel);min-width:0}
.ai-head{display:flex;align-items:center;gap:8px;min-width:0}
.ai-badge{font-weight:800;font-size:13px;color:var(--primary)}
.ai-by{font-size:12px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ai-x{border:0;background:transparent;color:var(--muted);font-size:15px;width:30px;height:30px;border-radius:8px;cursor:pointer}
.ai-x:hover{background:var(--panel2);color:var(--text)}
.ai-thread{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.ai-q{font-weight:700;font-size:13.5px;margin-top:6px}
.ai-a{font-size:14.5px;line-height:1.6;overflow-wrap:anywhere}
.ai-a code{font-family:var(--mono);font-size:12.5px}
.ai-caret{display:inline-block;width:7px;height:1em;margin-left:2px;vertical-align:-2px;background:var(--primary);animation:aiBlink 1s steps(2) infinite}
@keyframes aiBlink{50%{opacity:0}}
@media (prefers-reduced-motion:reduce){.ai-caret{animation:none}}
.ai-note{margin:8px 0;font-size:13.5px;color:var(--muted)}
.ai-chips{margin-top:10px}
.ai-chips .chip-btn:disabled,.ai-ask :disabled{opacity:.55;cursor:default}
.ai-ask{display:flex;gap:8px;margin-top:6px;min-width:0}
.ai-foot{font-size:12px;margin-top:8px}
.ai-more{margin-top:10px;font-size:13px}
.ai-more summary{cursor:pointer;color:var(--muted);font-weight:600}
.ai-page{display:grid;gap:14px;max-width:920px}
.ai-fold>summary{cursor:pointer;list-style-position:inside}
.ai-cites{display:flex;flex-direction:column;gap:2px;margin-top:8px;font-size:12.5px}
.bad-text{color:var(--red)}
input.grow{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:9px 11px;background:var(--panel)}
.shot{display:flex;gap:10px;align-items:flex-start;margin-top:8px}
.shot img{max-width:min(320px,100%);max-height:220px;border-radius:10px;border:1px solid var(--line)}
/* accounts: sign-in portal, show password, strength meter, My account */
.auth-form{display:grid;gap:12px;margin-top:14px}
.pw-wrap{position:relative;display:flex}
.pw-wrap input{flex:1;min-width:0;padding-right:64px}
.pw-eye{position:absolute;right:6px;top:50%;transform:translateY(-50%);border:0;background:transparent;color:var(--primary);font-weight:700;font-size:12.5px;padding:6px 8px;border-radius:8px;cursor:pointer;text-transform:none;letter-spacing:0}
.pw-eye:hover,.pw-eye:focus-visible{background:var(--panel2)}
.pw-meter{font-size:12px;font-weight:600;min-height:1em;margin-top:-6px}
.pw-meter.bad{color:var(--red)}.pw-meter.mid{color:var(--amber)}.pw-meter.good{color:var(--green)}
.g-btn{display:flex;justify-content:center;min-height:44px;margin-top:14px}
.or-line{display:flex;align-items:center;gap:10px;margin:12px 0 0;color:var(--muted);font-size:12.5px}
.or-line::before,.or-line::after{content:"";flex:1;height:1px;background:var(--line)}
.link-btn{border:0;background:transparent;color:var(--primary);font-weight:600;font-size:13px;padding:2px 0;cursor:pointer;justify-self:start}
.link-btn:hover{text-decoration:underline}
.acct-av{width:56px;height:56px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:24px;font-weight:800;color:#fff;background:var(--primary);object-fit:cover}
.acct-facts{display:grid;gap:10px;margin-top:16px}
.acct-facts>div{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2)}
.acct-facts span.muted{min-width:110px;font-size:12.5px}
.btn.danger{background:var(--red);border-color:var(--red);color:#fff}
/* AI tutor connection status */
.ai-status{font-size:13.5px}
.ai-status.good{background:var(--green-bg);border-color:transparent;color:var(--green)}
.ai-status.warn{background:var(--amber-bg);border-color:transparent;color:var(--amber)}
.ai-status.bad{background:var(--red-bg);border-color:transparent;color:var(--red)}
.ai-sites{display:grid;gap:8px;margin:10px 0}
.ai-site{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2)}
.ai-site>div{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.ai-site span{font-size:12.5px}

/* PRO previews: a blurred section with an unlock button; locked items in lists */
.pro-lock{position:relative;min-height:150px;border-radius:12px;overflow:hidden}
.pro-lock-body{filter:blur(5px);opacity:.55;pointer-events:none;user-select:none;max-height:300px;overflow:hidden}
.pro-lock-cta{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;padding:14px;
  background:linear-gradient(180deg,color-mix(in srgb,var(--panel) 30%,transparent),color-mix(in srgb,var(--panel) 85%,transparent))}
.pro-lock-cta .muted{font-size:13px;max-width:46ch}
.locked-card{cursor:pointer;opacity:.8}
.locked-card:hover{opacity:1}
.lock-tag{font-size:11px;font-weight:800;color:var(--amber);margin-left:6px;white-space:nowrap}
.nav-btn .nav-pro{margin-left:auto;font-size:10px;font-weight:800;letter-spacing:.06em;color:var(--amber);border:1px solid currentColor;border-radius:999px;padding:0 6px}
.chip-btn.locked{color:var(--muted);border-style:dashed}
.ai-lockbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:8px;padding:9px 12px;border:1px dashed var(--line);border-radius:12px;font-size:13px;color:var(--muted)}
.ai-lockbar span{flex:1;min-width:200px}
/* Home: Prelims and Mains groups */
.sec-title.wrap{flex-wrap:wrap;gap:10px}
.exam-group{margin-top:14px}
.exam-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:10px;min-width:0}
.exam-head p{margin:0;font-size:13.5px;color:var(--muted);max-width:90ch}
.exam-head p b{color:var(--text)}
.exam-tag{flex:none;font-size:11.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:999px;margin-top:1px}
.exam-tag.prelims{background:var(--soft);color:var(--primary)}
.exam-tag.mains{background:var(--amber-bg);color:var(--amber)}

/* AI question generator */
.gen-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;align-items:end}
.gen-form .field{min-width:0}
.gen-form select{width:100%;min-width:0}
.gen-status{margin-top:10px;font-size:13.5px;color:var(--muted)}
.gen-note{margin:12px 0;font-size:13.5px}
.gen-q{margin-top:12px}
.chip.ai-made{color:var(--primary);background:var(--soft)}
.gen-score{margin-top:12px;font-weight:700}

/* PRO plans */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:10px 0 12px}
.plan-card{position:relative;display:flex;flex-direction:column;gap:2px;align-items:flex-start;text-align:left;border:1.5px solid var(--line);border-radius:14px;padding:14px 14px 12px;background:var(--panel);color:var(--text);cursor:pointer;min-width:0}
.plan-card:hover{border-color:var(--primary)}
.plan-card.on{border-color:var(--primary);background:var(--soft);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 18%,transparent)}
.plan-name{font-size:14px}
.plan-price{font-size:26px;font-weight:800;letter-spacing:-.02em}
.plan-per{font-size:12.5px;color:var(--muted)}
.plan-tag{position:absolute;top:-9px;right:10px;font-size:10.5px;font-weight:800;letter-spacing:.04em;background:var(--primary);color:var(--on-primary);border-radius:999px;padding:2px 8px}
.pay-methods{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.pay-methods span{font-size:11.5px;font-weight:700;border:1px solid var(--line);border-radius:999px;padding:2px 9px;color:var(--muted);background:var(--panel2)}

/* long source names and file names wrap instead of widening the page on small phones */
.qcard,.panel,.callout,.src-link,.vid-link,.case,.finding,.stem,.opt{overflow-wrap:anywhere}
[data-tab-click]:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* Cloudflare Turnstile box */
.cf-box:not(:empty){min-height:65px;margin:4px 0}

.sets-note{font-size:13px;margin:8px 0 0}
.sets-mix{font-size:13px;margin:-4px 0 10px}

/* Question typography (user's spec): headings 20px medium, tight tracking, relaxed leading (16px on phones);
   options 14px regular (15px on phones, easier to tap); meta badges mono 12px uppercase, wide tracking */
.stem{font-size:20px;font-weight:500;letter-spacing:-.015em;line-height:1.625}
.opt{font-size:14px;font-weight:400;color:var(--opt-text)}
.qhead .chip,.meta,.cbt .timer,.src-link small{font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--meta)}
.qhead .chip.lv{color:var(--primary)}
@media (max-width:640px){
  .stem{font-size:16px;letter-spacing:0;line-height:1.5}
  .opt{font-size:15px}
}
/* Tap feedback: a quick spring press (scale .98) on everything you tap */
.btn,.opt,.chip-btn,.tile,.pal,.plan-card,.nav-btn,.paper-card,.icon-btn,.seg button,.tabbar button{
  transition:transform .28s cubic-bezier(.34,1.56,.64,1),background-color .15s,border-color .15s,box-shadow .15s,color .15s}
.btn:active,.opt:active,.chip-btn:active,.tile:active,.pal:active,.plan-card:active,.nav-btn:active,.paper-card:active,.icon-btn:active,.seg button:active,.tabbar button:active{transform:scale(.98)}
@media (prefers-reduced-motion:reduce){.btn,.opt,.chip-btn,.tile,.pal,.plan-card,.nav-btn,.paper-card,.icon-btn,.seg button,.tabbar button{transition:none}
  .btn:active,.opt:active,.chip-btn:active,.tile:active,.pal:active,.plan-card:active,.nav-btn:active,.paper-card:active,.icon-btn:active,.seg button:active,.tabbar button:active{transform:none}}

/* Mock test in the computer-based-test layout of SSC-run exams */
/* exam screen: the SSC computer-based test layout, full width with the app rail and tab bar hidden */
body.cbt-on .side,body.cbt-on .top,body.cbt-on .tabbar{display:none}
body.cbt-on .shell{grid-template-columns:minmax(0,1fr)}
body.cbt-on #view{padding:0;max-width:none}
.cbt{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh;background:var(--bg)}
.cbt-head{position:sticky;top:0;z-index:25;display:flex;align-items:center;gap:16px;color:#fff;background:var(--cbt-head);
  padding:calc(8px + env(safe-area-inset-top,0px)) max(16px,env(safe-area-inset-right,0px)) 8px max(16px,env(safe-area-inset-left,0px))}
.cbt-brand{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.cbt-brand b{font-size:15px;letter-spacing:.02em}
.cbt-brand span{font-size:12.5px;opacity:.82;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cbt-cand{display:flex;align-items:center;gap:9px}
.cbt-cand .acct-av{width:34px;height:34px;font-size:14px;background:rgba(255,255,255,.18)}
.cbt-cand small,.cbt-time small{display:block;font-size:10.5px;opacity:.75;text-transform:uppercase;letter-spacing:.06em}
.cbt-cand b{font-size:13.5px;font-weight:600}
.cbt-time{text-align:right}
.cbt-time .timer{display:inline-block;font-family:var(--mono);font-size:17px;color:#fff;background:rgba(255,255,255,.12);padding:2px 9px;border-radius:6px;letter-spacing:.04em}
.cbt-time .timer.low{background:#c62f3f}
.cbt-palclose{display:none;align-self:flex-end;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;padding:6px 12px;font-weight:600}
.cbt-palbtn{display:none;width:38px;height:38px;border-radius:8px;border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;font-size:18px}
.cbt-sub{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:var(--panel);border-bottom:1px solid var(--line);font-size:13px;
  padding:6px max(16px,env(safe-area-inset-right,0px)) 6px max(16px,env(safe-area-inset-left,0px))}
.cbt-sec{padding:5px 12px;border-radius:6px;background:var(--cbt-accent);color:#fff;font-weight:600;font-size:12.5px}
.cbt-instant{display:inline-flex;align-items:center;gap:6px;color:var(--muted);cursor:pointer}
.cbt-body{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 300px;align-items:start}
.cbt-q{min-width:0;min-height:100%;background:var(--panel);border-right:1px solid var(--line);padding:14px max(20px,env(safe-area-inset-left,0px)) 96px}
.cbt-qhead{display:flex;align-items:center;gap:8px;padding-bottom:10px;margin-bottom:12px;border-bottom:2px solid var(--line)}
.cbt-qhead b{font-size:16px}
.cbt-q .qcard{border:0;box-shadow:none;padding:0;background:transparent}
.cbt .opts{gap:4px}
.cbt .opt{border:0;border-radius:8px;background:transparent;padding:9px 10px;grid-template-columns:26px minmax(0,1fr)}
.cbt .opt:hover:not([disabled]){background:var(--panel2)}
.cbt .opt .let{width:24px;height:24px;border-radius:50%;border:2px solid var(--meta);background:transparent;font-size:11px}
.cbt .opt.sel{background:var(--soft)}
.cbt .opt.sel .let{background:var(--primary);border-color:var(--primary);color:var(--on-primary)}
.cbt .opt.ok{background:var(--green-bg)}.cbt .opt.bad{background:var(--red-bg)}
.cbt .opt.ok .let{border-color:var(--green)}.cbt .opt.bad .let{border-color:var(--red)}
.cbt-side{min-width:0;display:flex;flex-direction:column;gap:12px;background:var(--panel2);padding:14px max(16px,env(safe-area-inset-right,0px)) 96px 16px}
.cbt-who{display:flex;align-items:center;gap:10px}
.cbt-who .acct-av{width:40px;height:40px;font-size:16px}
.cbt-legend{display:grid;gap:7px;font-size:12px;color:var(--muted)}
.cbt-legend span{display:flex;align-items:center;gap:8px}
.cbt-legend i.pal{display:inline-grid;place-items:center;flex:none;width:30px;height:26px;font-style:normal;font-size:11.5px}
.cbt-palhead{background:var(--cbt-accent);color:#fff;font-weight:600;font-size:13px;padding:7px 10px;border-radius:6px}
.cbt-choose{margin:0}
.cbt-side .palette{gap:8px}
.cbt-side .pal{height:36px}
.btn.cbt-submit{width:100%;justify-content:center;background:var(--cbt-accent);color:#fff}
.cbt-actions{position:fixed;left:0;right:0;bottom:0;z-index:24;display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--panel);border-top:1px solid var(--line);
  box-shadow:0 -6px 18px rgba(20,30,60,.06);padding:10px max(16px,env(safe-area-inset-right,0px)) calc(10px + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
.btn.cbt-save{background:#1f9d55;color:#fff}
/* palette shapes and colours follow the exam's legend */
.pal.cbt-nv{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:6px}
.pal.cbt-na{background:#e0533d;color:#fff;border-color:transparent;border-radius:6px 6px 50% 50%/6px 6px 40% 40%}
.pal.cbt-ans{background:#21a366;color:#fff;border-color:transparent;border-radius:50% 50% 6px 6px/40% 40% 6px 6px}
.pal.cbt-mk{background:#7c4ddb;color:#fff;border-color:transparent;border-radius:50%}
.pal.cbt-amk{background:#7c4ddb;color:#fff;border-color:transparent;border-radius:50%;position:relative}
.pal.cbt-amk::after{content:"";position:absolute;right:-1px;bottom:-1px;width:10px;height:10px;border-radius:50%;background:#21a366;border:2px solid var(--panel)}
.pal.cbt-sol-ok{background:#21a366;color:#fff;border-color:transparent;border-radius:6px}
.pal.cbt-sol-bad{background:#e0533d;color:#fff;border-color:transparent;border-radius:6px}
.pal.cbt-sol-nv{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:6px}
.cbt .pal.cur{outline:2px solid var(--primary);outline-offset:2px}
.cbt-instr{width:100%;max-width:880px;margin:0 auto;padding:22px max(16px,env(safe-area-inset-right,0px)) 40px max(16px,env(safe-area-inset-left,0px))}
.cbt-instr h2{margin:0 0 12px;font-size:19px}
.cbt-rules{margin:0;padding-left:20px;display:grid;gap:10px;font-size:14px}
.cbt-rules .cbt-legend{margin-top:8px;font-size:12.5px;color:var(--text)}
.cbt-agree{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--panel);margin:16px 0}
.modal .panel.cbt-instr-card{max-width:660px;max-height:86vh;overflow:auto}
/* desktop: one fixed screen like the exam terminal; the question and the palette scroll on their own, buttons stay put */
@media (min-width:821px){
  .cbt{height:100vh;height:100dvh;overflow:hidden}
  .cbt-head{position:static}
  .cbt-body{min-height:0;overflow:hidden;align-items:stretch}
  .cbt-q,.cbt-side{overflow:auto;padding-bottom:20px}
  .cbt-instr{flex:1;overflow:auto}
  .cbt-actions{position:static;box-shadow:none}
}
@media (max-width:820px){
  .cbt-body{grid-template-columns:minmax(0,1fr)}
  .cbt-q{border-right:0;padding:12px max(16px,env(safe-area-inset-left,0px)) 132px max(16px,env(safe-area-inset-left,0px))}
  .cbt-side{position:fixed;top:0;right:0;bottom:0;width:min(330px,88vw);z-index:30;overflow:auto;transform:translateX(105%);transition:transform .2s ease;
    box-shadow:-12px 0 32px rgba(0,0,0,.22);padding-top:calc(14px + env(safe-area-inset-top,0px))}
  .cbt.pal-open .cbt-side{transform:none}
  .cbt-palbtn{display:inline-grid;place-items:center}
  .cbt-palclose{display:block}
  .cbt-exam{display:none}
  .cbt.pal-open::after{content:"";position:fixed;inset:0;z-index:29;background:rgba(10,15,30,.45)}
  .cbt-cand div{display:none}
  .cbt-head{gap:10px}
  .cbt-actions .btn{flex:1 1 auto;padding-inline:10px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){.cbt-side{transition:none}}

.src-hint{font-size:12px;display:inline-flex;align-items:center;gap:4px}

/* Login portal */
.auth{min-height:min(720px,calc(100vh - 140px))}
.auth-art{flex-direction:column;justify-content:center;align-items:flex-start;padding:40px}
.auth-art>div{width:100%}
.auth-points{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}
.auth-points li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:#eef1ff}
.auth-points li span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:rgba(255,255,255,.14);font-size:13px;flex:none}
.auth-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}
.auth-stats div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:12px}
.auth-stats b{display:block;font-size:22px;letter-spacing:-.02em}
.auth-stats span{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#cdd5ff}
.auth-card{width:100%;max-width:460px;justify-self:center;padding:26px}
.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.auth-brand small{display:block;color:var(--muted);font-size:13px}
.auth-form .field input,.auth-form .field select{min-height:48px;font-size:15px;border-radius:12px}
.field input:focus,.field select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 18%,transparent)}
.auth-form .btn.big{min-height:50px;font-size:15.5px}
.auth-trust{display:flex;flex-wrap:wrap;gap:6px 14px;justify-content:center;margin-top:16px;font-size:12px;color:var(--muted)}
@media (max-width:860px){.auth{grid-template-columns:1fr;min-height:0}.auth-art{padding:24px}.auth-stats b{font-size:18px}.auth-card{max-width:none;order:-1}}
.mp-parts{display:grid;gap:10px;margin-top:12px}
.mp-part{padding:12px 14px}
.mp-part h3{font-size:15px}

/* ===================== Modern UI (2026-10-31) =====================
   Soft-glow canvas, glass rail and top bar, layered card shadows, display headings, floating phone tab bar,
   and a full-screen login. The exam CBT screen keeps its own SSC layout (only shared tokens reach it). */
::selection{background:color-mix(in srgb,var(--primary) 22%,transparent)}
body{background:radial-gradient(1100px 560px at 105% -8%,var(--glow),transparent 62%),radial-gradient(900px 520px at -12% -4%,var(--glow2),transparent 58%),var(--bg);background-attachment:fixed;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,.wordmark,.hero h2,.stat b,.price-card .price,.plan-price,.auth-art h2,.sec-title h2,.panel h2{font-family:var(--display)}
*{scrollbar-width:thin;scrollbar-color:var(--line2) transparent}

/* rail and top bar */
.side{background:var(--glass);backdrop-filter:saturate(1.4) blur(18px);-webkit-backdrop-filter:saturate(1.4) blur(18px);border-right:1px solid var(--line);padding:22px 14px 18px}
.brand{padding:4px 8px 14px;border-bottom:1px solid var(--line)}
.brand b{font-size:17px}
.logo{border-radius:13px;box-shadow:0 8px 20px -6px color-mix(in srgb,var(--primary) 60%,transparent),inset 0 1px 0 rgba(255,255,255,.3);
  background:linear-gradient(140deg,#60a5fa,#2754c5 60%,#1e3a8a)}
.wordmark span{background:linear-gradient(120deg,var(--primary),var(--primary2));-webkit-background-clip:text;background-clip:text;color:transparent}
.side-nav{gap:2px}
.nav-btn{position:relative;padding:8px 12px;border-radius:12px;font-size:14px;font-weight:600}
.nav-btn .ico{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;font-size:14px;transition:background-color .15s,color .15s}
.nav-btn:hover{background:color-mix(in srgb,var(--panel2) 80%,transparent)}
.nav-btn.on{background:linear-gradient(90deg,var(--soft),color-mix(in srgb,var(--soft) 0%,transparent));color:var(--primary)}
.nav-btn.on::before{content:"";position:absolute;left:-14px;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:linear-gradient(var(--primary2),var(--primary))}
.nav-btn.on .ico{background:var(--panel);color:var(--primary);box-shadow:var(--shadow-sm)}
.side-note{line-height:1.5}
.side-note a{color:var(--muted)}
.top{background:var(--glass);backdrop-filter:saturate(1.4) blur(16px);-webkit-backdrop-filter:saturate(1.4) blur(16px)}
.top h1{font-size:21px;font-weight:700;letter-spacing:-.02em}
.icon-btn,.avatar{border-radius:12px;box-shadow:var(--shadow-sm)}
.icon-btn:hover{border-color:var(--line2);background:var(--panel2)}
.avatar{background:linear-gradient(140deg,var(--primary2),var(--primary))}

/* surfaces */
.panel,.stat,.qcard{border-color:var(--line);box-shadow:var(--shadow-sm)}
.panel.raised,.qcard{box-shadow:var(--shadow)}
.panel h2{font-size:18px;font-weight:700;letter-spacing:-.015em}
.sec-title h2{font-size:17px;font-weight:700;letter-spacing:-.015em}
.stat{border-radius:18px;padding:16px 18px}
.stat b{font-size:26px;font-weight:800}
.paper-card,[data-card],[data-sim],.tile,.plan-card,.locked-card{transition:transform .28s cubic-bezier(.34,1.56,.64,1),box-shadow .2s,border-color .2s,background-color .15s}
.paper-card:hover,[data-card]:hover,[data-sim]:hover,.plan-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--primary) 45%,var(--line))}
.paper-card .code{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.04em;padding:2px 8px;border-radius:8px;background:var(--soft)}
.tile{border-radius:16px;box-shadow:var(--shadow-sm)}
.tile:not([disabled]):not(.locked):hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--primary) 50%,var(--line))}
.tile.done{background:linear-gradient(180deg,var(--green-bg),var(--panel));border-color:color-mix(in srgb,var(--green) 55%,var(--line))}
.next-card{border-left:0;position:relative;overflow:hidden}
.next-card::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:linear-gradient(var(--primary2),var(--primary))}
.bar{height:8px;border:0;background:color-mix(in srgb,var(--line) 70%,transparent)}
.bar i{border-radius:9px;background:linear-gradient(90deg,var(--primary),var(--primary2))}
.callout{border-radius:16px}
.empty{border:1.5px dashed var(--line2);border-radius:var(--radius);background:color-mix(in srgb,var(--panel) 60%,transparent)}

/* hero banners: layered mesh gradient with a faint grid */
.hero,.pro-banner{isolation:isolate;border-radius:24px;
  background:radial-gradient(60% 90% at 88% 0%,rgba(96,165,250,.5),transparent 60%),radial-gradient(55% 80% at 0% 100%,rgba(167,139,250,.22),transparent 60%),linear-gradient(135deg,#0a1633,#173a8a 52%,#2754c5)}
.hero{padding:28px}
.hero::after,.pro-banner::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px) 0 0/28px 28px,linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px) 0 0/28px 28px;
  -webkit-mask-image:radial-gradient(80% 90% at 80% 10%,#000,transparent 75%);mask-image:radial-gradient(80% 90% at 80% 10%,#000,transparent 75%)}
.pro-banner{position:relative;overflow:hidden}
.hero .orb{filter:blur(46px);opacity:.45}
.hero h2{font-size:27px;font-weight:800;letter-spacing:-.025em;line-height:1.2}
.hero .eyebrow{color:#bfdbfe}

/* controls */
.btn{border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary2));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.22),0 8px 20px -8px color-mix(in srgb,var(--primary) 70%,transparent)}
.btn:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:inset 0 1px 0 rgba(255,255,255,.22),0 12px 26px -10px color-mix(in srgb,var(--primary) 75%,transparent)}
.btn.ghost{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm);filter:none}
.btn.ghost:hover{border-color:var(--line2);background:var(--panel2)}
.btn.light{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.26);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:none}
.btn.light:hover{background:rgba(255,255,255,.2)}
.btn.danger{background:var(--red);box-shadow:none}
.btn.cbt-submit{background:var(--cbt-accent);box-shadow:none}
.btn.cbt-save{background:#1f9d55;box-shadow:none}
.chip{border-radius:999px;padding:3px 10px}
.seg{border-radius:14px;padding:4px;background:var(--panel2)}
.seg button{border-radius:10px}
.seg button.on{box-shadow:var(--shadow-sm);color:var(--primary)}
.field{text-transform:none;letter-spacing:0;font-size:13px;font-weight:600;color:var(--text);gap:6px}
.field select,.field input,textarea,input.grow{background:var(--panel2);border:1px solid var(--line);border-radius:12px;min-height:44px;transition:border-color .15s,box-shadow .15s,background-color .15s}
.field select:hover,.field input:hover,textarea:hover{border-color:var(--line2)}
.field input:focus,.field select:focus,textarea:focus,input.grow:focus{outline:none;background:var(--panel);border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 18%,transparent)}
.opt{border-radius:14px}
.opt:hover:not([disabled]){border-color:color-mix(in srgb,var(--primary) 55%,var(--line));background:color-mix(in srgb,var(--soft) 45%,var(--panel))}
.opt .let{border-radius:10px}

/* modal and toast */
.modal{background:rgba(8,12,26,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.modal .panel{border-radius:24px;box-shadow:0 30px 80px -20px rgba(8,12,30,.45);animation:popIn .26s cubic-bezier(.34,1.56,.64,1)}
#toast{border-radius:14px;padding:11px 18px;box-shadow:0 14px 34px -10px rgba(8,12,30,.45)}
@keyframes popIn{from{transform:translateY(10px) scale(.97)}}

/* phones: floating glass tab bar */
@media (max-width:820px){
  .tabbar{left:max(12px,env(safe-area-inset-left,0px));right:max(12px,env(safe-area-inset-right,0px));bottom:calc(10px + env(safe-area-inset-bottom,0px));
    padding:6px;border:1px solid var(--line);border-radius:22px;background:var(--glass);backdrop-filter:saturate(1.5) blur(18px);-webkit-backdrop-filter:saturate(1.5) blur(18px);
    box-shadow:0 14px 36px -12px rgba(15,23,42,.35)}
  .tabbar button{padding:6px 2px;border-radius:16px;gap:3px;font-size:10.5px}
  .tabbar button .ico{display:grid;place-items:center;width:42px;height:28px;border-radius:12px;transition:background-color .15s}
  .tabbar button.on .ico{background:var(--soft)}
  #view{padding-bottom:calc(110px + env(safe-area-inset-bottom,0px))}
  .g4{grid-template-columns:repeat(auto-fit,minmax(min(148px,100%),1fr))}
  .hero{padding:22px}
  .hero h2{font-size:22px}
  .top h1{font-size:18px}
}

/* login: a full-screen split portal with an animated mesh panel */
body.auth-on .side,body.auth-on .top,body.auth-on .tabbar{display:none}
body.auth-on .shell{grid-template-columns:minmax(0,1fr)}
body.auth-on #view{max-width:none;padding:0}
body.auth-on .auth{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:0;min-height:100vh;min-height:100dvh}
.auth-art{border-radius:0;padding:clamp(28px,5vw,72px);isolation:isolate;
  background:radial-gradient(42% 52% at 18% 18%,rgba(59,130,246,.6),transparent 70%),radial-gradient(36% 46% at 84% 26%,rgba(167,139,250,.3),transparent 70%),
    radial-gradient(48% 58% at 62% 92%,rgba(39,84,197,.75),transparent 70%),#071025;background-size:150% 150%;animation:mesh 20s ease-in-out infinite alternate}
.auth-art::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px) 0 0/32px 32px,linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px) 0 0/32px 32px;
  -webkit-mask-image:radial-gradient(70% 70% at 40% 40%,#000,transparent 80%);mask-image:radial-gradient(70% 70% at 40% 40%,#000,transparent 80%)}
@keyframes mesh{to{background-position:100% 100%}}
.auth-art .orb{filter:blur(60px);opacity:.4}
.auth-art>div{max-width:560px}
.auth-art h2{font-size:clamp(28px,3.4vw,46px);font-weight:800;letter-spacing:-.035em;line-height:1.08;
  background:linear-gradient(120deg,#ffffff 30%,#bfdbfe 70%,#c4b5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.auth-art p{font-size:16px;line-height:1.6;color:#d5dbf5}
.auth-points li span,.auth-stats div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.auth-stats div{border-radius:16px;padding:14px}
.auth-stats b{font-family:var(--display);font-size:24px;font-weight:800}
body.auth-on .auth-card{align-self:center;justify-self:center;width:calc(100% - 48px);max-width:440px;margin:32px 24px;padding:32px;border-radius:26px;border:1px solid var(--line);box-shadow:var(--shadow)}
.auth-back{display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;color:var(--muted);font-weight:600;font-size:13px;padding:4px 0;margin:-6px 0 14px;cursor:pointer}
.auth-back:hover{color:var(--primary)}
.auth-brand .logo{width:46px;height:46px;font-size:13px}
.auth-brand b{font-size:20px}
.auth-card .seg button{padding:9px 13px}
.auth-form .field input,.auth-form .field select{min-height:50px}
.auth-form .btn.big{min-height:52px;border-radius:14px;font-size:16px}
@media (max-width:860px){
  body.auth-on .auth{grid-template-columns:minmax(0,1fr);min-height:0;gap:16px;padding-block:16px 24px;
    padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
  body.auth-on .auth-card{width:100%;max-width:none;margin:0;padding:22px}
  body.auth-on .auth-art{border-radius:24px;padding:24px}
}
@media (prefers-reduced-motion:reduce){.auth-art{animation:none}.modal .panel{animation:none}}


/* Design fixes chosen by the user (2026-10-31): one meaning per colour (gold = PRO only, Mains in teal),
   a quiet light PRO banner so the hero is the one focal point, outline PRO tags on paper cards, line icons. */
.exam-tag.mains{background:color-mix(in srgb,var(--accent) 14%,var(--panel));color:color-mix(in srgb,var(--accent) 80%,var(--text))}
.pro-banner{background:linear-gradient(120deg,color-mix(in srgb,#f5b301 12%,var(--panel)),var(--panel) 70%);color:var(--text);
  border:1px solid color-mix(in srgb,#f5b301 40%,var(--line));box-shadow:var(--shadow-sm)}
.pro-banner::after{display:none}
.pro-banner p{color:var(--muted)}
.pro-banner .eyebrow{color:#a16207}
.pro-banner .btn,.pro-banner .btn.light{background:linear-gradient(135deg,#ffd76a,#f5b301);color:#3b2a00;border:0;box-shadow:0 8px 18px -8px rgba(245,179,1,.7)}
.paper-card .pro-badge{background:transparent;border:1px solid color-mix(in srgb,#d4a017 70%,transparent);color:#a16207;font-size:10px;padding:1px 7px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pro-banner .eyebrow,:root:not([data-theme="light"]) .paper-card .pro-badge{color:#f2c94c}}
:root[data-theme="dark"] .pro-banner .eyebrow,:root[data-theme="dark"] .paper-card .pro-badge{color:#f2c94c}
.ico svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.tabbar .ico svg{width:20px;height:20px}

/* Light theme: one dark area and one light area (user, 2026-10-31). The rail is deep exam blue, the content and the
   welcome hero stay white, so no two dark blocks sit side by side. The dark theme keeps its all-dark look. */
:root{--rail-bg:linear-gradient(180deg,#0b1f4d,#14337f);--rail-text:rgba(255,255,255,.74);--rail-strong:#ffffff;--rail-line:rgba(255,255,255,.12);
  --rail-hover:rgba(255,255,255,.08);--rail-on:rgba(255,255,255,.14);--rail-accent:#93c5fd;--rail-muted:rgba(219,234,254,.7);--rail-gold:#fcd34d;
  --hero-bg:radial-gradient(60% 120% at 100% 0%,rgba(59,130,246,.16),transparent 60%),linear-gradient(135deg,#eaf1ff,#ffffff 65%);
  --hero-text:#0b1530;--hero-muted:#46526b;--hero-eyebrow:#2754c5;--hero-line:#d6e2fb;--hero-grid:rgba(39,84,197,.07)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--rail-bg:var(--glass);--rail-text:var(--muted);--rail-strong:var(--text);--rail-line:var(--line);
  --rail-hover:color-mix(in srgb,var(--panel2) 80%,transparent);--rail-on:var(--soft);--rail-accent:var(--primary);--rail-muted:var(--muted);--rail-gold:var(--amber);
  --hero-bg:radial-gradient(60% 90% at 88% 0%,rgba(96,165,250,.5),transparent 60%),radial-gradient(55% 80% at 0% 100%,rgba(167,139,250,.22),transparent 60%),linear-gradient(135deg,#0a1633,#173a8a 52%,#2754c5);
  --hero-text:#ffffff;--hero-muted:#dbe6ff;--hero-eyebrow:#bfdbfe;--hero-line:transparent;--hero-grid:rgba(255,255,255,.06)}}
:root[data-theme="dark"]{--rail-bg:var(--glass);--rail-text:var(--muted);--rail-strong:var(--text);--rail-line:var(--line);
  --rail-hover:color-mix(in srgb,var(--panel2) 80%,transparent);--rail-on:var(--soft);--rail-accent:var(--primary);--rail-muted:var(--muted);--rail-gold:var(--amber);
  --hero-bg:radial-gradient(60% 90% at 88% 0%,rgba(96,165,250,.5),transparent 60%),radial-gradient(55% 80% at 0% 100%,rgba(167,139,250,.22),transparent 60%),linear-gradient(135deg,#0a1633,#173a8a 52%,#2754c5);
  --hero-text:#ffffff;--hero-muted:#dbe6ff;--hero-eyebrow:#bfdbfe;--hero-line:transparent;--hero-grid:rgba(255,255,255,.06)}
.side{background:var(--rail-bg);border-right-color:var(--rail-line)}
.side .brand{border-bottom-color:var(--rail-line)}
.side .brand b{color:var(--rail-strong)}
.side .brand small,.side-note,.side-note a{color:var(--rail-muted)}
.side .wordmark span{background:linear-gradient(120deg,var(--rail-accent),var(--rail-accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.side .nav-btn{color:var(--rail-text)}
.side .nav-btn:hover{background:var(--rail-hover);color:var(--rail-strong)}
.side .nav-btn.on{background:var(--rail-on);color:var(--rail-strong)}
.side .nav-btn.on::before{background:var(--rail-accent)}
.side .nav-btn.on .ico{background:var(--rail-on);color:var(--rail-strong);box-shadow:none}
.side .nav-btn.pro-nav{color:var(--rail-gold)!important}
.side .nav-btn .nav-pro{color:var(--rail-gold)}
.hero{background:var(--hero-bg);color:var(--hero-text);border:1px solid var(--hero-line)}
.hero p{color:var(--hero-muted)}
.hero .eyebrow{color:var(--hero-eyebrow)}
.hero::after{background:linear-gradient(var(--hero-grid) 1px,transparent 1px) 0 0/28px 28px,linear-gradient(90deg,var(--hero-grid) 1px,transparent 1px) 0 0/28px 28px}
.hero .orb{opacity:.25}
:root:not([data-theme="dark"]) .hero .btn.light{background:var(--panel);color:var(--primary);border:1px solid var(--hero-line);box-shadow:var(--shadow-sm);backdrop-filter:none}
:root:not([data-theme="dark"]) .hero .hero-row .btn.light:first-child{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;border:0}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .hero .btn.light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.26);box-shadow:none}
  :root:not([data-theme="light"]) .hero .hero-row .btn.light:first-child{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.26)}}
.auth-art .eyebrow{color:#bfdbfe}

/* Log-in page legal links and notices; the signed-in devices list (2026-10-31) */
.auth-legal{display:flex;flex-wrap:wrap;gap:4px 8px;justify-content:center;margin-top:10px;font-size:12px;color:var(--muted)}
.auth-legal a{color:var(--muted)}
.signed-out-note{margin-top:14px;background:var(--amber-bg);border-color:transparent;font-size:13.5px}
.bad-note{background:var(--red-bg);border-color:transparent;color:var(--text);font-size:13.5px}
.dev-list{display:grid;gap:8px}
.dev{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel2)}
.dev-ico{font-size:20px;flex:none}
.dev-main{flex:1;min-width:0;font-size:13.5px;line-height:1.5}

/* share CrackSAS */
.share-panel{max-width:440px}
.share-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.share-grid .btn{justify-content:center;text-decoration:none}
.share-copy{display:flex;gap:8px;margin-top:12px}
.share-copy input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--panel);color:var(--text);font:inherit}
@media (max-width:420px){.share-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* log-in page: public plans and prices below the split */
.auth-jump{margin-top:18px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#fff;border-radius:999px;padding:8px 16px;font:inherit;font-size:13.5px;font-weight:600;cursor:pointer}
.auth-jump:hover{background:rgba(255,255,255,.16)}
.auth-plans{grid-column:1/-1;padding-block:clamp(32px,5vw,64px);scroll-margin-top:12px}
body.auth-on .auth-plans{padding-left:max(24px,env(safe-area-inset-left,0px));padding-right:max(24px,env(safe-area-inset-right,0px));background:var(--bg);border-top:1px solid var(--line)}
.ap-head{max-width:1080px;margin:0 auto 20px}
.ap-head h2{font-family:var(--display);font-size:clamp(24px,3vw,34px);letter-spacing:-.025em;margin:4px 0 6px;text-wrap:balance}
.ap-head p{margin:0;max-width:65ch}
.ap-grid{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:16px;align-items:start}
.ap-free,.ap-pro{display:flex;flex-direction:column;gap:4px;padding:22px;min-width:0}
.ap-free .ticks{margin:14px 0 16px}
.ap-free .ticks li b{font-weight:500}
.ap-plan{cursor:default}
.ap-plan:hover{transform:none;box-shadow:none;border-color:var(--line)}
@media (max-width:860px){.ap-grid{grid-template-columns:minmax(0,1fr)}body.auth-on .auth-plans{padding-left:0;padding-right:0;border-top:0;background:transparent;padding-block:8px 0}}