/* ============================================================
   Exami UI — modern glass / gradient design system (light + dark)
   ============================================================ */
:root{
  --bg:#f4f5fb; --bg-soft:#eceefa; --surface:#ffffff; --card:rgba(255,255,255,.78); --card-solid:#fff;
  --ink:#0e1124; --ink-2:#2b3050; --muted:#646c8a; --line:rgba(17,20,45,.09); --line-2:rgba(17,20,45,.14);
  --brand:#6d5dfc; --brand-2:#a855f7; --brand-3:#ec4899; --cyan:#06b6d4;
  --grad:linear-gradient(135deg,#6d5dfc 0%,#a855f7 55%,#ec4899 100%);
  --grad-soft:linear-gradient(135deg,rgba(109,93,252,.12),rgba(236,72,153,.10));
  --brand-soft:rgba(109,93,252,.10);
  --ok:#10b981; --ok-soft:rgba(16,185,129,.12); --warn:#f59e0b; --warn-soft:rgba(245,158,11,.14); --bad:#ef4444; --bad-soft:rgba(239,68,68,.12);
  --radius:20px; --radius-sm:12px;
  --shadow:0 1px 2px rgba(20,20,60,.04),0 8px 30px rgba(40,40,110,.07);
  --shadow-lg:0 30px 80px -20px rgba(70,50,180,.35);
  --glow:0 10px 30px -8px rgba(109,93,252,.55);
  --font:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-head:"Kanit","IBM Plex Sans Thai",system-ui,sans-serif;
  color-scheme:light;
}
html[data-theme=dark]{
  --bg:#070915; --bg-soft:#0d1022; --surface:#10142a; --card:rgba(18,22,44,.72); --card-solid:#12162d;
  --ink:#eef0ff; --ink-2:#c9cdf0; --muted:#949cc4; --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.14);
  --brand-soft:rgba(129,115,255,.16);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 40px rgba(0,0,0,.35);
  --shadow-lg:0 30px 90px -20px rgba(109,93,252,.45);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}
body::before{content:"";position:fixed;inset:-20vh -20vw;z-index:-2;pointer-events:none;
  background:radial-gradient(40vw 40vw at 10% 0%,rgba(109,93,252,.16),transparent 60%),
             radial-gradient(35vw 35vw at 95% 10%,rgba(236,72,153,.12),transparent 60%),
             radial-gradient(40vw 40vw at 60% 110%,rgba(6,182,212,.10),transparent 60%)}
html[data-theme=dark] body::before{opacity:1.6}
::selection{background:rgba(109,93,252,.3)}
a{color:var(--brand);text-decoration:none} a:hover{text-decoration:underline}
html[data-theme=dark] a{color:#a89dff}
img{max-width:100%}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:600;line-height:1.25;margin:.2em 0 .5em;letter-spacing:-.005em}
h1{font-size:clamp(1.6rem,2.6vw,2.1rem)} h2{font-size:1.4rem} h3{font-size:1.12rem}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em;background:var(--brand-soft);padding:1px 6px;border-radius:6px}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:800px}
.muted{color:var(--muted)} .small{font-size:.875rem} .tiny{font-size:.78rem}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.between{justify-content:space-between} .center-x{justify-content:center}
.grow{flex:1}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.grid-2{display:grid;gap:18px;grid-template-columns:1fr 1fr} @media(max-width:800px){.grid-2{grid-template-columns:1fr}}
.grid-3{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)} @media(max-width:900px){.grid-3{grid-template-columns:1fr}}
.stack>*+*{margin-top:12px}
.mt{margin-top:16px}.mt2{margin-top:32px}.mb{margin-bottom:16px}
.hidden{display:none!important}
[x-cloak]{display:none!important}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 72%,transparent);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:18px;height:66px}
.logo{font-family:var(--font-head);font-weight:700;font-size:1.35rem;color:var(--ink)!important;display:flex;align-items:center;gap:10px;letter-spacing:.01em}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:11px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:1rem;box-shadow:var(--glow)}
.nav-links{display:flex;gap:2px;align-items:center;flex:1}
.nav-links a{color:var(--ink-2)!important;padding:7px 13px;border-radius:999px;font-size:.94rem;font-weight:500;position:relative}
.nav-links a:hover{background:var(--brand-soft);text-decoration:none}
.nav-links a.active{background:var(--brand-soft);color:var(--brand)!important}
html[data-theme=dark] .nav-links a.active{color:#b9b0ff!important}
.nav-right{display:flex;gap:8px;align-items:center}
.pill-badge{position:absolute;top:0;right:0;min-width:17px;height:17px;padding:0 4px;border-radius:99px;background:var(--brand-3);color:#fff;font-size:.66rem;display:grid;place-items:center;font-weight:700;box-shadow:0 0 0 2px var(--bg)}
.icon-btn{width:38px;height:38px;border-radius:12px;border:1px solid var(--line-2);background:var(--card);color:var(--ink);display:grid;place-items:center;cursor:pointer;font-size:1rem;transition:.2s}
.icon-btn:hover{transform:translateY(-1px);border-color:var(--brand)}
.menu-btn{display:none}
@media(max-width:900px){
  .menu-btn{display:grid;margin-left:auto}
  .nav-links,.nav-right{display:none}
  .nav.open .container{height:auto;flex-wrap:wrap;padding:12px 20px 16px}
  .nav.open .nav-links,.nav.open .nav-right{display:flex;flex-direction:column;align-items:stretch;width:100%}
}

/* ---------- cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.card.pad-sm{padding:16px}
.card h3{margin-top:0}
.card-link{display:block;color:inherit!important;transition:transform .25s,box-shadow .25s,border-color .25s}
.card-link:hover{text-decoration:none;transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(109,93,252,.45)}
.card.glow{position:relative}
.card.glow::after{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;opacity:.8}
.page{padding-top:34px;padding-bottom:60px}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--line-2);font-size:.82rem;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow)}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px var(--ok-soft);animation:pulse 2s infinite}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 18px;border-radius:12px;border:1px solid var(--line-2);background:var(--card-solid);color:var(--ink)!important;font:inherit;font-size:.94rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;text-decoration:none!important}
.btn:hover{transform:translateY(-1px);border-color:var(--brand);box-shadow:var(--shadow)}
.btn:active{transform:translateY(0) scale(.98)}
.btn.primary,.btn.ai{background:var(--grad);border:0;color:#fff!important;box-shadow:var(--glow);background-size:150% 150%;background-position:0 0}
.btn.primary:hover,.btn.ai:hover{background-position:100% 100%;box-shadow:0 14px 34px -8px rgba(168,85,247,.65)}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff!important}
.btn.danger{color:var(--bad)!important;border-color:rgba(239,68,68,.35);background:transparent}
.btn.danger:hover{background:var(--bad-soft);border-color:var(--bad)}
.btn.ghost{border-color:transparent;background:transparent;box-shadow:none}
.btn.ghost:hover{background:var(--brand-soft)}
.btn.glass{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);color:#fff!important;backdrop-filter:blur(8px)}
.btn.sm{padding:6px 12px;font-size:.84rem;border-radius:10px}
.btn.lg{padding:14px 28px;font-size:1.05rem;border-radius:14px}
.btn.xl{padding:17px 34px;font-size:1.12rem;border-radius:16px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.donate{background:linear-gradient(135deg,#ffdd00,#ffb800);border:0;color:#1a1300!important;font-weight:600;box-shadow:0 8px 22px -8px rgba(255,190,0,.7)}
form.inline{display:inline}

/* ---------- forms ---------- */
label{display:block;font-weight:600;font-size:.88rem;margin:0 0 6px;color:var(--ink-2)}
.field{margin-bottom:16px}
.hint{font-weight:400;color:var(--muted);font-size:.8rem}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],input[type=datetime-local],input[type=search],select,textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line-2);border-radius:12px;font:inherit;background:var(--surface);color:var(--ink);transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(109,93,252,.18)}
textarea{min-height:90px;resize:vertical}
input[type=file]{font:inherit;color:var(--muted)}
input[type=checkbox],input[type=radio]{accent-color:var(--brand)}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;cursor:pointer;margin:8px 0;color:var(--ink)}
.check input{margin-top:4px;width:18px;height:18px;flex:none}

/* ---------- alerts, badges ---------- */
.alert{padding:13px 16px;border-radius:14px;margin-bottom:14px;border:1px solid}
.alert.ok{background:var(--ok-soft);border-color:rgba(16,185,129,.35)}
.alert.warn{background:var(--warn-soft);border-color:rgba(245,158,11,.4)}
.alert.bad{background:var(--bad-soft);border-color:rgba(239,68,68,.35)}
.alert.info{background:var(--brand-soft);border-color:rgba(109,93,252,.3)}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:.74rem;font-weight:600;background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line)}
.badge.ok{background:var(--ok-soft);color:#059669;border-color:transparent} .badge.warn{background:var(--warn-soft);color:#b45309;border-color:transparent}
.badge.bad{background:var(--bad-soft);color:#dc2626;border-color:transparent} .badge.brand{background:var(--brand-soft);color:var(--brand);border-color:transparent}
.badge.grad{background:var(--grad);color:#fff;border:0}
html[data-theme=dark] .badge.ok{color:#34d399} html[data-theme=dark] .badge.warn{color:#fbbf24} html[data-theme=dark] .badge.bad{color:#f87171} html[data-theme=dark] .badge.brand{color:#b9b0ff}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow);backdrop-filter:blur(14px)}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{font-weight:600;color:var(--muted);white-space:nowrap;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
tr:last-child td{border-bottom:0}
tbody tr,table tr{transition:background .15s} table tr:hover td{background:rgba(109,93,252,.04)}
td.num,th.num{text-align:right} td.center,th.center{text-align:center}

/* ---------- progress ---------- */
.bar{height:8px;background:var(--bg-soft);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--grad);border-radius:99px;transition:width .6s cubic-bezier(.2,.8,.2,1)}
.bar.warn>i{background:var(--warn)} .bar.bad>i{background:var(--bad)} .bar.ok>i{background:var(--ok)}

/* ---------- stats ---------- */
.stats{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.stat{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat b{display:block;font-family:var(--font-head);font-size:1.7rem;font-weight:600;line-height:1.2}
.stat span{color:var(--muted);font-size:.84rem}
.stat::after{content:"";position:absolute;right:-30px;top:-30px;width:90px;height:90px;border-radius:50%;background:var(--grad-soft)}

/* ---------- hero / landing ---------- */
.hero{position:relative;padding:70px 0 40px;overflow-x:clip}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr}.hero-art{display:none}}
.nw{white-space:nowrap}
.hero h1{font-size:clamp(2.2rem,4.6vw,3.6rem);font-weight:700;line-height:1.12;margin:18px 0 18px;letter-spacing:-.01em}
.hero .lead{font-size:clamp(1.02rem,1.5vw,1.2rem);color:var(--muted);max-width:600px;margin:0 0 30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px}
.trust div b{display:block;font-family:var(--font-head);font-size:1.6rem}
.trust div span{font-size:.84rem;color:var(--muted)}
.hero-art{position:relative;height:520px}
.float-card{position:absolute;background:var(--card);border:1px solid var(--line-2);border-radius:22px;padding:18px;box-shadow:var(--shadow-lg);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.fc-exam{left:0;top:96px;width:76%;animation:float 7s ease-in-out infinite;z-index:1}
.fc-ai{right:0;top:0;width:56%;animation:float 6s ease-in-out -2s infinite;z-index:3}
.fc-score{right:0;bottom:10px;width:44%;animation:float 8s ease-in-out -4s infinite;z-index:2}
.fc-chip{left:-18px;bottom:0;z-index:3;animation:float 5s ease-in-out -1s infinite;padding:10px 16px;border-radius:999px;font-weight:600;font-size:.9rem}
.mock-opt{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line-2);border-radius:12px;margin-top:8px;font-size:.92rem}
.mock-opt .l{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--bg-soft);font-weight:700;font-size:.8rem}
.mock-opt.on{border-color:var(--ok);background:var(--ok-soft)} .mock-opt.on .l{background:var(--ok);color:#fff}
.typing::after{content:"▍";animation:blink 1s steps(1) infinite;color:var(--brand)}
.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;z-index:-1;pointer-events:none}
.grid-bg{position:absolute;inset:0;z-index:-1;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%)}
.section{padding:70px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 40px}
.section-head h2{font-size:clamp(1.7rem,3.2vw,2.5rem);font-weight:700;margin-bottom:10px}
.section-head p{color:var(--muted);font-size:1.05rem;margin:0}
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);padding:10px 0}
.marquee-track{display:flex;gap:12px;width:max-content;animation:marquee 38s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.chip{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;background:var(--card);border:1px solid var(--line-2);font-weight:500;white-space:nowrap;box-shadow:var(--shadow)}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.bento>.card{grid-column:span 2;position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s}
.bento>.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.bento>.card.wide{grid-column:span 3} .bento>.card.xwide{grid-column:span 4}
@media(max-width:980px){.bento{grid-template-columns:1fr 1fr}.bento>.card,.bento>.card.wide,.bento>.card.xwide{grid-column:span 1}}
@media(max-width:600px){.bento{grid-template-columns:1fr}}
.ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:1.45rem;background:var(--grad);box-shadow:var(--glow);margin-bottom:14px}
.ico.c2{background:linear-gradient(135deg,#06b6d4,#3b82f6);box-shadow:0 10px 30px -8px rgba(6,182,212,.55)}
.ico.c3{background:linear-gradient(135deg,#10b981,#06b6d4);box-shadow:0 10px 30px -8px rgba(16,185,129,.55)}
.ico.c4{background:linear-gradient(135deg,#f59e0b,#ec4899);box-shadow:0 10px 30px -8px rgba(245,158,11,.55)}
.bento h3{font-size:1.2rem;margin-bottom:6px} .bento p{color:var(--muted);margin:0;font-size:.95rem}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
@media(max-width:800px){.steps{grid-template-columns:1fr}}
.step{counter-increment:s;position:relative;padding-top:56px}
.step::before{content:counter(s);position:absolute;top:18px;left:22px;font-family:var(--font-head);font-size:2.6rem;font-weight:700;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.9}
.cta-panel{position:relative;overflow:hidden;border-radius:28px;padding:56px 40px;text-align:center;color:#fff;background:linear-gradient(135deg,#4f46e5 0%,#9333ea 50%,#db2777 100%);box-shadow:var(--shadow-lg)}
.cta-panel h2{font-size:clamp(1.7rem,3vw,2.4rem);color:#fff}
.cta-panel p{opacity:.9;max-width:640px;margin:0 auto 24px}
.cta-panel::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:22px 22px;opacity:.5}
.cta-panel>*{position:relative}
.terminal{background:#0b0e1f;color:#e7e9ff;border-radius:18px;border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow-lg);overflow:hidden;font-size:.93rem}
.terminal-bar{display:flex;gap:7px;padding:12px 14px;background:rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.06)}
.terminal-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.terminal-bar i:nth-child(2){background:#febc2e}.terminal-bar i:nth-child(3){background:#28c840}
.terminal-body{padding:18px 20px;min-height:260px;white-space:pre-wrap;font-family:var(--font)}
.terminal .k{color:#a78bfa}.terminal .g{color:#34d399}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.2,.8,.2,1),transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- ads & footer ---------- */
.ad-slot{margin:18px auto;text-align:center;max-width:1180px;padding:0 20px;overflow:hidden}
.ad-slot:empty{display:none}
footer{border-top:1px solid var(--line);background:color-mix(in srgb,var(--bg) 60%,transparent);padding:34px 0;margin-top:40px;color:var(--muted);font-size:.9rem}
footer .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
.announce{background:var(--grad);color:#fff;text-align:center;padding:9px 16px;font-size:.9rem;font-weight:500}
.announce a{color:#fff!important;text-decoration:underline}

/* ---------- exam taking ---------- */
.q-card{margin-bottom:18px}
.q-head{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:10px}
.q-num{font-family:var(--font-head);font-weight:600;font-size:1.05rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.q-prompt{white-space:pre-wrap;font-size:1.08rem;margin-bottom:14px;font-weight:500}
.q-img{max-height:380px;border-radius:14px;border:1px solid var(--line);margin-bottom:14px}
.opt{position:relative;display:flex;gap:12px;align-items:center;padding:12px 14px;border:1.5px solid var(--line-2);border-radius:14px;margin-bottom:10px;cursor:pointer;font-weight:400;transition:.18s;background:var(--surface);color:var(--ink)}
.opt:hover{border-color:rgba(109,93,252,.6);transform:translateX(2px)}
.opt.sel{border-color:var(--brand);background:var(--brand-soft);box-shadow:0 0 0 4px rgba(109,93,252,.12)}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .letter{width:32px;height:32px;flex:none;border-radius:10px;display:grid;place-items:center;font-weight:700;font-size:.85rem;background:var(--bg-soft);color:var(--ink-2);transition:.18s}
.opt.sel .letter{background:var(--grad);color:#fff;box-shadow:var(--glow)}
.blank{display:inline-block;width:auto!important;min-width:140px;max-width:100%;padding:4px 10px!important;margin:2px 4px;border:0!important;border-bottom:2px solid var(--brand)!important;border-radius:8px 8px 0 0!important;background:var(--brand-soft)!important}
.fill-text{line-height:2.5;font-size:1.06rem;white-space:pre-wrap}
.match-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:center;margin-bottom:10px;padding:8px 10px;border-radius:12px;background:var(--bg-soft)}
@media(max-width:600px){.match-row{grid-template-columns:1fr}}
.order-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--line-2);border-radius:12px;margin-bottom:8px;background:var(--surface);transition:.2s}
.order-item b{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);flex:none}
.order-item .grow{white-space:pre-wrap}
.timer{position:sticky;top:76px;z-index:30;background:var(--card);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid var(--line-2);border-radius:16px;padding:12px 16px;margin-bottom:16px;box-shadow:var(--shadow)}
.timer-row{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.timer .clock{font-family:var(--font-head);font-size:1.25rem;font-weight:600;font-variant-numeric:tabular-nums}
.timer .clock.low{color:var(--bad);animation:pulse 1s infinite}
.qnav{display:flex;flex-wrap:wrap;gap:6px}
.qnav a{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:10px;font-size:.8rem;color:var(--ink)!important;background:var(--surface);font-weight:600;transition:.15s}
.qnav a:hover{text-decoration:none;border-color:var(--brand)}
.qnav a.done{background:var(--grad);border-color:transparent;color:#fff!important}

/* ---------- builder ---------- */
.builder-q{position:relative;border-left:0}
.builder-q::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:4px;border-radius:0 4px 4px 0;background:var(--grad)}
.builder-q .q-tools{display:flex;gap:2px;flex-wrap:wrap}
.opt-edit{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.opt-edit input[type=text]{flex:1}
.tabs{display:inline-flex;gap:4px;padding:5px;border-radius:14px;background:var(--bg-soft);border:1px solid var(--line);margin-bottom:20px;flex-wrap:wrap}
.tabs button,.tabs a{background:none;border:0;padding:9px 16px;font:inherit;font-weight:500;cursor:pointer;color:var(--muted);border-radius:10px;transition:.2s}
.tabs .on{color:var(--ink);background:var(--card-solid);box-shadow:var(--shadow)}
.sticky-bar{position:sticky;bottom:12px;background:var(--card);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid var(--line-2);border-radius:16px;padding:10px 16px;z-index:25;margin-top:20px;box-shadow:var(--shadow-lg)}
.modal-bg{position:fixed;inset:0;background:rgba(8,10,25,.55);backdrop-filter:blur(6px);z-index:60;display:flex;align-items:flex-start;justify-content:center;padding:50px 16px;overflow:auto;animation:fade .2s}
.modal{background:var(--card-solid);border:1px solid var(--line-2);border-radius:24px;max-width:780px;width:100%;padding:26px;box-shadow:var(--shadow-lg);animation:pop .25s cubic-bezier(.2,.8,.2,1)}
.copybox{display:flex;gap:6px}
.copybox input{font-family:ui-monospace,monospace;font-size:.85rem}
.qr{background:#fff;border-radius:16px;padding:8px;display:inline-block}
.dropzone{border:2px dashed var(--line-2);border-radius:18px;padding:22px;text-align:center;background:var(--bg-soft)}

/* ---------- course ---------- */
.learn{display:grid;grid-template-columns:300px 1fr;gap:22px}
@media(max-width:900px){.learn{grid-template-columns:1fr}}
.lesson-list a{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:12px;color:var(--ink)!important;font-size:.93rem;transition:.15s}
.lesson-list a:hover{background:var(--brand-soft);text-decoration:none}
.lesson-list a.cur{background:var(--grad-soft);font-weight:600;box-shadow:inset 3px 0 0 var(--brand)}
.lesson-list .ic{width:22px;flex:none;text-align:center}
.video{position:relative;padding-top:56.25%;border-radius:18px;overflow:hidden;background:#000;box-shadow:var(--shadow-lg)}
.video iframe,.video video,.video>div{position:absolute;inset:0;width:100%;height:100%;border:0}
.prose{line-height:1.8}
.prose pre{background:#0b0e1f;color:#e2e8f0;padding:14px;border-radius:12px;overflow:auto}
.prose pre code{background:none;padding:0;color:inherit}
.prose blockquote{border-left:4px solid var(--brand);margin:0;padding:4px 14px;color:var(--muted);background:var(--brand-soft);border-radius:0 10px 10px 0}
.cover{aspect-ratio:16/9;background:var(--grad);display:grid;place-items:center;font-size:3rem;position:relative;overflow:hidden}
.cover::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.2) 1px,transparent 1px);background-size:18px 18px}
.matrix td,.matrix th{text-align:center;white-space:nowrap}
.matrix td:first-child,.matrix th:first-child{text-align:left;position:sticky;left:0;background:var(--card-solid)}
.dot{display:inline-block;width:26px;height:26px;border-radius:8px;line-height:26px;font-size:.75rem;font-weight:700}
.dot.done{background:var(--ok);color:#fff}.dot.seen{background:#fde68a;color:#78350f}.dot.none{background:var(--bg-soft);color:var(--muted)}

/* ---------- results ---------- */
.score-big{font-family:var(--font-head);font-size:3.2rem;font-weight:700;line-height:1}
.ring{position:relative;width:190px;height:190px;margin:8px auto}
.ring svg{transform:rotate(-90deg);width:100%;height:100%}
.ring .track{stroke:var(--bg-soft)} .ring .val{transition:stroke-dashoffset 1.6s cubic-bezier(.2,.8,.2,1)}
.ring .ring-label{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ring .ring-label b{font-family:var(--font-head);font-size:2.6rem;line-height:1}
.pre{white-space:pre-wrap;word-break:break-word}
.hist{display:flex;align-items:flex-end;gap:6px;height:130px;padding-top:8px}
.hist div{flex:1;height:100%;background:var(--bg-soft);border-radius:8px 8px 4px 4px;position:relative}
.hist div i{position:absolute;bottom:0;left:0;right:0;background:var(--grad);border-radius:8px 8px 4px 4px}
.hist-l{display:flex;gap:6px}.hist-l span{flex:1;text-align:center;font-size:.7rem;color:var(--muted)}
.lb-row{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px}
.lb-row.me{background:var(--grad-soft);box-shadow:inset 0 0 0 1px rgba(109,93,252,.35)}
.lb-rank{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:700;background:var(--bg-soft);flex:none}
.lb-row:nth-child(1) .lb-rank{background:linear-gradient(135deg,#fde047,#f59e0b);color:#fff}
.lb-row:nth-child(2) .lb-rank{background:linear-gradient(135deg,#e5e7eb,#9ca3af);color:#fff}
.lb-row:nth-child(3) .lb-rank{background:linear-gradient(135deg,#fdba74,#c2410c);color:#fff}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#111427;color:#fff;padding:12px 20px;border-radius:14px;z-index:100;font-size:.92rem;box-shadow:var(--shadow-lg);animation:pop .25s;border:1px solid rgba(255,255,255,.1)}
.welcome{position:relative;overflow:hidden;border-radius:26px;padding:30px 32px;color:#fff;background:linear-gradient(135deg,#4f46e5 0%,#9333ea 55%,#db2777 100%);box-shadow:var(--shadow-lg);margin-bottom:28px}
.welcome::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);background-size:20px 20px}
.welcome>*{position:relative}
.welcome h1{color:#fff;margin:0 0 4px}
.welcome .muted{color:rgba(255,255,255,.8)}
.welcome .glass-box{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);border-radius:18px;padding:14px 16px;backdrop-filter:blur(10px);min-width:260px}
.welcome .bar{background:rgba(255,255,255,.2)} .welcome .bar>i{background:#fff}
.exam-card{display:flex;flex-direction:column;gap:10px}
.exam-card h3{margin:0;font-size:1.08rem}
.exam-card .actions{display:flex;gap:6px;margin-top:auto;flex-wrap:nowrap}.exam-card .actions .btn{padding:6px 10px}
.exam-card .meta{display:flex;gap:14px;color:var(--muted);font-size:.84rem;flex-wrap:wrap}
.auth-wrap{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100vh - 66px)}
@media(max-width:900px){.auth-wrap{grid-template-columns:1fr}.auth-art{display:none!important}}
.auth-art{position:relative;overflow:hidden;background:linear-gradient(135deg,#4338ca 0%,#7e22ce 55%,#be185d 100%);color:#fff;display:flex;flex-direction:column;justify-content:center;padding:60px}
.auth-art::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);background-size:22px 22px}
.auth-art>*{position:relative}
.auth-art h2{font-size:2.3rem;color:#fff;line-height:1.2}
.auth-form{display:flex;align-items:center;justify-content:center;padding:40px 20px}
.model-card{position:relative}
.model-card .fit{position:absolute;top:16px;right:16px}
.stars{letter-spacing:2px;color:#f59e0b}
.live-dot{display:inline-block;vertical-align:middle;width:9px;height:9px;border-radius:50%;background:var(--bad);margin-right:6px;animation:pulse 1.4s infinite}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes blink{50%{opacity:0}}
@keyframes marquee{to{transform:translateX(-50%)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
@keyframes fade{from{opacity:0}}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}}
@keyframes shimmer{to{background-position:200% 0}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

/* ---------- print ---------- */
@media print{
  .nav,footer,.ad-slot,.announce,.no-print{display:none!important}
  body{background:#fff;color:#000}
  body::before{display:none}
  .card{box-shadow:none;backdrop-filter:none;background:#fff;border-color:#ddd}
}