/* =========================================================================
   Électrosoudage PE/PEHD — Préparation ATG B527.9
   Design system — application d'autoformation
   ========================================================================= */

:root{
  /* Acier / structure */
  --steel-900:#0d1a2d; --steel-800:#122439; --steel-700:#1a3a6c;
  --steel-600:#26518c; --steel-500:#3f6fb0; --steel-100:#e9f0f9;
  /* Gaz / accents */
  --gas:#ffc21f; --gas-deep:#f5a300; --flame:#e8761a;
  /* Sémantique */
  --ok:#2e8b45; --ok-bg:#e7f5ec;
  --warn:#c9820a; --warn-bg:#fdf3e0;
  --danger:#d13b3b; --danger-bg:#fdecec;
  --info:#2a63c9; --info-bg:#e9f0fc;
  --tip:#0f8a8a; --tip-bg:#e4f6f5;
  /* Encre / surfaces */
  --ink:#18212e; --muted:#5b6a7d; --faint:#8a99ab;
  --line:#dbe3ee; --line-strong:#c3cedd;
  --bg:#eaeff5; --card:#ffffff; --card-2:#f6f9fc;
  /* Divers */
  --radius:14px; --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(16,32,55,.06), 0 1px 3px rgba(16,32,55,.08);
  --shadow:0 6px 22px rgba(16,32,55,.10);
  --shadow-lg:0 18px 50px rgba(13,26,45,.22);
  --sidebar-w:288px;
  --maxw:940px;
  --font:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:var(--font); color:var(--ink); background:var(--bg);
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:var(--steel-600); text-decoration:none}
img{max-width:100%; display:block}
button{font-family:inherit}

/* ---------------------------------------------------------------- Layout */
.app{display:flex; min-height:100vh}

/* -------------------------------------------------------------- Sidebar */
.sidebar{
  width:var(--sidebar-w); flex:0 0 var(--sidebar-w);
  background:linear-gradient(180deg,var(--steel-900),var(--steel-800));
  color:#dce6f2; position:fixed; inset:0 auto 0 0; height:100vh;
  display:flex; flex-direction:column; z-index:40;
}
.brand{padding:20px 20px 16px; border-bottom:1px solid rgba(255,255,255,.08)}
.brand .logo{display:flex; align-items:center; gap:11px}
.brand .mark{
  width:42px; height:42px; border-radius:11px; flex:0 0 42px;
  background:linear-gradient(145deg,var(--gas),var(--gas-deep));
  display:grid; place-items:center; box-shadow:0 4px 12px rgba(245,163,0,.35);
}
.brand .mark svg{width:26px; height:26px}
.brand h1{font-size:15px; margin:0; line-height:1.25; color:#fff; font-weight:700}
.brand .sub{font-size:11.5px; color:var(--gas); font-weight:600; letter-spacing:.3px; margin-top:2px}

.progress-wrap{padding:15px 20px; border-bottom:1px solid rgba(255,255,255,.08)}
.progress-wrap .lbl{display:flex; justify-content:space-between; font-size:12px; color:#9db2cc; margin-bottom:7px}
.progress-wrap .lbl b{color:var(--gas)}
.pbar{height:8px; border-radius:99px; background:rgba(255,255,255,.12); overflow:hidden}
.pbar>i{display:block; height:100%; width:0;
  background:linear-gradient(90deg,var(--gas),var(--flame)); border-radius:99px; transition:width .5s ease}

.nav{flex:1; overflow-y:auto; padding:10px 12px 24px}
.nav::-webkit-scrollbar{width:8px}
.nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14); border-radius:8px}
.nav-item{
  display:flex; align-items:center; gap:11px; width:100%; text-align:left;
  padding:9px 12px; margin:2px 0; border:0; background:transparent; cursor:pointer;
  color:#c4d3e6; border-radius:10px; font-size:13.5px; line-height:1.25; transition:.15s;
}
.nav-item:hover{background:rgba(255,255,255,.07); color:#fff}
.nav-item.active{background:rgba(255,194,31,.14); color:#fff; box-shadow:inset 3px 0 0 var(--gas)}
.nav-item .ni-num{
  flex:0 0 26px; height:26px; border-radius:8px; display:grid; place-items:center;
  background:rgba(255,255,255,.09); font-size:12px; font-weight:700; color:#9db2cc;
}
.nav-item.active .ni-num{background:var(--gas); color:var(--steel-900)}
.nav-item.done .ni-num{background:var(--ok); color:#fff}
.nav-item .ni-txt{flex:1}
.nav-item .ni-check{opacity:0; color:var(--ok); font-size:14px}
.nav-item.done .ni-check{opacity:1}
.nav-sep{font-size:10.5px; text-transform:uppercase; letter-spacing:1.3px; color:#6f849e; padding:14px 14px 5px; font-weight:700}
.nav-item.exam{background:rgba(232,118,26,.15); color:#ffd9b0; margin-top:6px}
.nav-item.exam .ni-num{background:var(--flame); color:#fff}
.nav-item.exam:hover{background:rgba(232,118,26,.28)}
.nav-dl{display:flex; align-items:center; gap:9px; margin:0 12px 14px; padding:11px 14px; border-radius:10px;
  background:rgba(255,194,31,.14); color:#ffd98a; font-size:13px; font-weight:600; text-decoration:none;
  border:1px solid rgba(255,194,31,.25); transition:.15s; flex:0 0 auto}
.nav-dl:hover{background:rgba(255,194,31,.24); color:#fff}

/* ---------------------------------------------------------------- Main */
.main{flex:1; margin-left:var(--sidebar-w); min-width:0}
.topbar{
  position:sticky; top:0; z-index:30; background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--line);
  display:flex; align-items:center; gap:14px; padding:11px 26px;
}
.topbar .burger{display:none; border:0; background:transparent; font-size:22px; cursor:pointer; color:var(--steel-700)}
.topbar .crumb{font-size:13px; color:var(--muted); flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.topbar .crumb b{color:var(--ink)}
.topbar .tb-prog{display:flex; align-items:center; gap:9px; font-size:12.5px; color:var(--muted)}
.topbar .tb-prog .mini{width:120px; height:7px; background:var(--line); border-radius:99px; overflow:hidden}
.topbar .tb-prog .mini>i{display:block; height:100%; background:linear-gradient(90deg,var(--gas),var(--flame)); width:0; transition:width .5s}

.view{max-width:var(--maxw); margin:0 auto; padding:30px 26px 90px}

/* ---------------------------------------------------------- Section hero */
.hero{
  border-radius:var(--radius); padding:26px 28px; margin-bottom:24px; color:#fff; position:relative; overflow:hidden;
  background:linear-gradient(135deg,var(--steel-700),var(--steel-800));
  box-shadow:var(--shadow);
}
.hero::after{content:""; position:absolute; right:-40px; top:-40px; width:220px; height:220px;
  background:radial-gradient(circle,rgba(255,194,31,.22),transparent 70%)}
.hero .kicker{display:inline-block; font-size:11.5px; font-weight:700; letter-spacing:1.2px; text-transform:uppercase;
  color:var(--steel-900); background:var(--gas); padding:4px 11px; border-radius:99px; margin-bottom:12px}
.hero h2{margin:0 0 6px; font-size:27px; line-height:1.15; position:relative}
.hero p{margin:0; color:#c6d6ec; font-size:15px; max-width:60ch; position:relative}

/* ------------------------------------------------------------- Blocks */
.block{margin:22px 0}
.lead{font-size:17px; color:var(--ink); background:var(--card); border-left:4px solid var(--gas);
  padding:15px 20px; border-radius:0 var(--radius-sm) var(--radius-sm) 0; box-shadow:var(--shadow-sm)}
.h-block{font-size:13px; text-transform:uppercase; letter-spacing:1px; color:var(--steel-600);
  font-weight:700; margin:30px 0 12px; display:flex; align-items:center; gap:9px}
.h-block::before{content:""; width:20px; height:3px; border-radius:3px; background:var(--gas)}

/* cards */
.cards{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px}
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:17px 18px; box-shadow:var(--shadow-sm); transition:.18s}
.card:hover{box-shadow:var(--shadow); transform:translateY(-2px); border-color:var(--line-strong)}
.card h4{margin:0 0 7px; font-size:15.5px; color:var(--steel-700); display:flex; align-items:center; gap:8px}
.card h4 .dot{width:9px; height:9px; border-radius:3px; background:var(--gas); flex:0 0 9px}
.card p, .card ul{margin:0; font-size:14px; color:var(--muted)}
.card ul{padding-left:18px}

/* figure */
figure.fig{margin:0; background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; box-shadow:var(--shadow-sm)}
figure.fig .imgbox{background:var(--card-2); display:grid; place-items:center; padding:6px}
figure.fig .imgbox.photo{padding:0}
figure.fig img{width:100%; height:auto}
figure.fig .svgbox{padding:18px 18px 6px}
figure.fig figcaption{padding:11px 16px; font-size:13px; color:var(--muted); border-top:1px solid var(--line);
  display:flex; align-items:center; gap:8px}
figure.fig figcaption::before{content:""; width:5px; height:5px; border-radius:99px; background:var(--gas); flex:0 0 5px}
.fig.wide{grid-column:1/-1}

/* gallery */
.gallery{display:grid; grid-template-columns:repeat(auto-fill,minmax(190px,1fr)); gap:13px}

/* table */
.tbl-wrap{overflow-x:auto; border-radius:var(--radius); box-shadow:var(--shadow-sm); border:1px solid var(--line)}
table.tbl{width:100%; border-collapse:collapse; background:var(--card); font-size:14px; min-width:340px}
table.tbl caption{caption-side:top; text-align:left; font-size:13px; color:var(--muted); padding:0 0 8px}
table.tbl th{background:var(--steel-700); color:#fff; text-align:left; padding:9px 13px; font-weight:600; font-size:13.5px}
table.tbl td{padding:8px 13px; border-top:1px solid var(--line); vertical-align:top}
table.tbl tbody tr:nth-child(even){background:var(--card-2)}
table.tbl tbody tr:hover{background:var(--steel-100)}

/* callout */
.callout{border-radius:var(--radius); padding:15px 18px 15px 16px; display:flex; gap:13px; align-items:flex-start;
  border:1px solid; box-shadow:var(--shadow-sm)}
.callout .ic{flex:0 0 30px; height:30px; border-radius:9px; display:grid; place-items:center; font-weight:800; color:#fff; font-size:16px}
.callout h4{margin:0 0 3px; font-size:15px}
.callout p, .callout ul{margin:0; font-size:14px}
.callout ul{padding-left:18px}
.callout.info{background:var(--info-bg); border-color:#c6d8f6; color:#1c3a6b}
.callout.info .ic{background:var(--info)}
.callout.tip{background:var(--tip-bg); border-color:#bfe6e4; color:#0a5c5c}
.callout.tip .ic{background:var(--tip)}
.callout.warn{background:var(--warn-bg); border-color:#f3ddb0; color:#7a5300}
.callout.warn .ic{background:var(--warn)}
.callout.danger{background:var(--danger-bg); border-color:#f5c4c4; color:#8f2020}
.callout.danger .ic{background:var(--danger)}

/* keypoints */
.keypoints{background:linear-gradient(135deg,var(--steel-800),var(--steel-700)); color:#eaf1fb;
  border-radius:var(--radius); padding:20px 22px; box-shadow:var(--shadow)}
.keypoints h4{margin:0 0 12px; font-size:15px; color:var(--gas); display:flex; align-items:center; gap:9px; text-transform:uppercase; letter-spacing:.6px}
.keypoints ul{margin:0; padding:0; list-style:none; display:grid; gap:9px}
.keypoints li{position:relative; padding-left:28px; font-size:14.5px}
.keypoints li::before{content:"✓"; position:absolute; left:0; top:0; width:20px; height:20px; border-radius:6px;
  background:var(--gas); color:var(--steel-900); font-size:12px; font-weight:800; display:grid; place-items:center}

/* steps */
.steps{position:relative; margin:6px 0}
.steps::before{content:""; position:absolute; left:19px; top:6px; bottom:6px; width:2px; background:var(--line-strong)}
.step{position:relative; padding:0 0 20px 56px}
.step:last-child{padding-bottom:0}
.step .num{position:absolute; left:0; top:0; width:40px; height:40px; border-radius:50%;
  background:var(--card); border:2px solid var(--steel-600); color:var(--steel-700); font-weight:800;
  display:grid; place-items:center; z-index:1; box-shadow:var(--shadow-sm); font-size:15px}
.step.checked .num{background:var(--ok); border-color:var(--ok); color:#fff}
.step .body{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:14px 16px; box-shadow:var(--shadow-sm)}
.step .body h4{margin:0 0 5px; font-size:15.5px; color:var(--steel-700); display:flex; align-items:center; gap:9px; justify-content:space-between}
.step .body h4 .t{display:flex; align-items:center; gap:9px}
.step .body p{margin:0; font-size:14px; color:var(--muted)}
.step .body img{margin-top:11px; border-radius:var(--radius-sm); border:1px solid var(--line); width:100%; max-width:360px}
.step .tick{border:1.5px solid var(--line-strong); background:var(--card); width:22px; height:22px; border-radius:6px;
  cursor:pointer; flex:0 0 22px; display:grid; place-items:center; color:transparent; font-size:13px; transition:.15s}
.step.checked .tick{background:var(--ok); border-color:var(--ok); color:#fff}

/* decoder */
.decoder{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:20px; box-shadow:var(--shadow-sm)}
.decoder .marking{display:flex; flex-wrap:wrap; gap:7px; background:#0d1a2d; padding:16px; border-radius:var(--radius-sm); justify-content:center; margin-bottom:16px}
.decoder .seg{font-family:"Consolas","SF Mono",monospace; font-size:15px; font-weight:700; color:#eaf1fb;
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12); padding:7px 11px; border-radius:8px;
  cursor:pointer; transition:.15s; position:relative}
.decoder .seg:hover{background:rgba(255,194,31,.18); border-color:var(--gas)}
.decoder .seg.active{background:var(--gas); color:var(--steel-900); border-color:var(--gas)}
.decoder .seg small{display:block; font-size:9.5px; color:var(--gas); font-weight:600; text-align:center; margin-top:2px; letter-spacing:.3px}
.decoder .seg.active small{color:var(--steel-800)}
.decoder .reveal{background:var(--card-2); border:1px dashed var(--line-strong); border-radius:var(--radius-sm); padding:15px 17px; min-height:70px}
.decoder .reveal .rt{font-size:12px; text-transform:uppercase; letter-spacing:.6px; color:var(--flame); font-weight:700; margin-bottom:4px}
.decoder .reveal .rv{font-size:16px; font-weight:700; color:var(--steel-700); margin-bottom:4px}
.decoder .reveal .rd{font-size:14px; color:var(--muted)}
.decoder .hint{font-size:12.5px; color:var(--faint); margin-top:10px; text-align:center}

/* ------------------------------------------------------------- Quiz */
.quiz{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow); margin-top:36px; overflow:hidden}
.quiz-head{background:linear-gradient(135deg,var(--steel-700),var(--steel-800)); color:#fff; padding:17px 22px; display:flex; align-items:center; gap:12px}
.quiz-head .qi{width:38px; height:38px; border-radius:10px; background:var(--gas); display:grid; place-items:center; flex:0 0 38px}
.quiz-head h3{margin:0; font-size:17px}
.quiz-head p{margin:2px 0 0; font-size:12.5px; color:#b9cae2}
.quiz-body{padding:8px 22px 22px}
.q{padding:18px 0; border-bottom:1px solid var(--line)}
.q:last-of-type{border-bottom:0}
.q .qq{font-weight:700; font-size:15.5px; margin-bottom:12px; display:flex; gap:10px}
.q .qq .qn{flex:0 0 26px; height:26px; border-radius:7px; background:var(--steel-100); color:var(--steel-700); font-size:13px; display:grid; place-items:center; font-weight:800}
.opts{display:grid; gap:9px}
.opt{display:flex; align-items:center; gap:11px; padding:11px 14px; border:1.5px solid var(--line); border-radius:10px;
  cursor:pointer; font-size:14.5px; background:var(--card); transition:.14s; text-align:left; width:100%}
.opt:hover:not(:disabled){border-color:var(--steel-500); background:var(--steel-100)}
.opt .mk{flex:0 0 24px; height:24px; border-radius:7px; border:1.5px solid var(--line-strong); display:grid; place-items:center;
  font-weight:800; font-size:12px; color:var(--muted); background:var(--card)}
.opt.correct{border-color:var(--ok); background:var(--ok-bg)}
.opt.correct .mk{background:var(--ok); border-color:var(--ok); color:#fff}
.opt.wrong{border-color:var(--danger); background:var(--danger-bg)}
.opt.wrong .mk{background:var(--danger); border-color:var(--danger); color:#fff}
.opt:disabled{cursor:default}
.explain{margin-top:11px; font-size:13.5px; padding:11px 14px; border-radius:9px; background:var(--info-bg); color:#1c3a6b;
  border-left:3px solid var(--info); display:none}
.explain.show{display:block}
.explain.ok{background:var(--ok-bg); color:#1c5c30; border-color:var(--ok)}
.q.answered .opt{pointer-events:none}

/* pager */
.pager{display:flex; justify-content:space-between; gap:12px; margin-top:40px}
.btn{border:0; border-radius:11px; padding:13px 20px; font-size:14.5px; font-weight:700; cursor:pointer;
  display:inline-flex; align-items:center; gap:9px; transition:.16s; box-shadow:var(--shadow-sm)}
.btn.prev{background:var(--card); color:var(--steel-700); border:1px solid var(--line)}
.btn.prev:hover{background:var(--steel-100)}
.btn.next{background:linear-gradient(135deg,var(--steel-700),var(--steel-600)); color:#fff; margin-left:auto}
.btn.next:hover{filter:brightness(1.08); box-shadow:var(--shadow)}
.btn.gas{background:linear-gradient(135deg,var(--gas),var(--gas-deep)); color:var(--steel-900)}
.btn:disabled{opacity:.4; cursor:default}

/* ------------------------------------------------------ Home parcours */
.home-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:15px; margin-top:8px}
.pcard{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:18px; cursor:pointer;
  box-shadow:var(--shadow-sm); transition:.18s; text-align:left; display:flex; flex-direction:column; gap:9px; position:relative; overflow:hidden}
.pcard:hover{transform:translateY(-3px); box-shadow:var(--shadow); border-color:var(--steel-500)}
.pcard .pn{width:38px; height:38px; border-radius:10px; background:var(--steel-100); color:var(--steel-700);
  font-weight:800; display:grid; place-items:center; font-size:16px}
.pcard.done .pn{background:var(--ok); color:#fff}
.pcard h4{margin:0; font-size:15.5px; color:var(--steel-700)}
.pcard p{margin:0; font-size:13px; color:var(--muted)}
.pcard .pc-check{position:absolute; top:12px; right:12px; color:var(--ok); font-size:16px; opacity:0}
.pcard.done .pc-check{opacity:1}

/* ------------------------------------------------------ Exam / résultat */
.exam-intro{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:24px; box-shadow:var(--shadow-sm); text-align:center}
.exam-intro .big{font-size:44px}
.stat-row{display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin:18px 0}
.stat{background:var(--card-2); border:1px solid var(--line); border-radius:var(--radius-sm); padding:13px 20px; min-width:120px}
.stat .v{font-size:26px; font-weight:800; color:var(--steel-700)}
.stat .l{font-size:12px; color:var(--muted)}
.scorecard{text-align:center; padding:30px; border-radius:var(--radius); color:#fff; box-shadow:var(--shadow)}
.scorecard.pass{background:linear-gradient(135deg,var(--ok),#1f6b34)}
.scorecard.fail{background:linear-gradient(135deg,var(--flame),#c85a12)}
.scorecard .pct{font-size:56px; font-weight:800; line-height:1}
.scorecard .verdict{font-size:20px; font-weight:700; margin-top:6px}
.scorecard p{margin:8px 0 0; opacity:.92}

.badge-pill{display:inline-block; font-size:11px; font-weight:700; padding:3px 9px; border-radius:99px; letter-spacing:.4px}
.badge-pill.gas{background:var(--gas); color:var(--steel-900)}
.mini-bar{display:inline-block; width:90px; height:8px; background:var(--line); border-radius:99px; overflow:hidden; vertical-align:middle; margin-right:4px}
.mini-bar>i{display:block; height:100%; background:linear-gradient(90deg,var(--gas),var(--flame))}
code{background:var(--steel-100); padding:1px 5px; border-radius:4px; font-size:.9em; color:var(--steel-700)}

.toast{position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(120%);
  background:var(--steel-900); color:#fff; padding:12px 20px; border-radius:11px; box-shadow:var(--shadow-lg);
  font-size:14px; z-index:80; transition:transform .35s; display:flex; align-items:center; gap:10px}
.toast.show{transform:translateX(-50%) translateY(0)}

.scrim{position:fixed; inset:0; background:rgba(9,18,31,.5); z-index:39; opacity:0; pointer-events:none; transition:.25s}

/* ---------------------------------------------------------- Responsive */
@media (max-width:900px){
  :root{--sidebar-w:280px}
  .sidebar{transform:translateX(-100%); transition:transform .28s; box-shadow:var(--shadow-lg)}
  body.nav-open .sidebar{transform:translateX(0)}
  body.nav-open .scrim{opacity:1; pointer-events:auto}
  .main{margin-left:0}
  .topbar .burger{display:block}
  .hero h2{font-size:22px}
  .view{padding:22px 16px 80px}
}
/* ---------------------------------------------------------- Portail d'accès */
.gate{position:fixed; inset:0; z-index:100; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--steel-900),var(--steel-800)); padding:20px}
.gate.hidden{display:none}
.gate::after{content:""; position:absolute; right:-80px; top:-80px; width:360px; height:360px;
  background:radial-gradient(circle,rgba(255,194,31,.16),transparent 70%)}
.gate-card{background:var(--card); border-radius:18px; box-shadow:var(--shadow-lg); padding:34px 32px 30px;
  max-width:430px; width:100%; text-align:center; position:relative; z-index:1}
.gate-card .mark{width:56px; height:56px; border-radius:15px; margin:0 auto 16px;
  background:linear-gradient(145deg,var(--gas),var(--gas-deep)); display:grid; place-items:center; box-shadow:0 6px 16px rgba(245,163,0,.4)}
.gate-card .mark svg{width:34px; height:34px}
.gate-card h2{margin:0 0 4px; font-size:20px; color:var(--steel-700)}
.gate-card .g-sub{margin:0 0 22px; font-size:13.5px; color:var(--muted)}
.gate-card label{display:block; text-align:left; font-size:12.5px; font-weight:700; color:var(--steel-700); margin:0 0 6px; letter-spacing:.3px}
.gate-card input{width:100%; padding:14px 16px; border:1.5px solid var(--line-strong); border-radius:11px;
  font-size:18px; letter-spacing:2px; text-align:center; font-family:"Consolas",monospace; text-transform:uppercase; color:var(--ink)}
.gate-card input:focus{outline:none; border-color:var(--gas); box-shadow:0 0 0 3px rgba(255,194,31,.25)}
.gate-card .g-btn{width:100%; margin-top:14px; border:0; border-radius:11px; padding:14px; font-size:15px; font-weight:700;
  background:linear-gradient(135deg,var(--steel-700),var(--steel-600)); color:#fff; cursor:pointer; transition:.16s}
.gate-card .g-btn:hover{filter:brightness(1.1)}
.gate-card .g-err{margin-top:12px; font-size:13.5px; color:var(--danger); min-height:18px; font-weight:600}
.gate-card .g-hint{margin-top:16px; font-size:12px; color:var(--faint); line-height:1.5}
.gate-card.shake{animation:shake .4s}
@keyframes shake{0%,100%{transform:translateX(0)}20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.gate-names{display:grid; gap:8px; margin-bottom:14px}
.gate-name{display:flex; align-items:center; gap:12px; padding:11px 14px; border:1.5px solid var(--line); border-radius:11px;
  background:var(--card); cursor:pointer; font-size:15px; font-weight:600; color:var(--ink); text-align:left; transition:.14s}
.gate-name:hover{border-color:var(--gas); background:var(--steel-100); transform:translateX(2px)}
.gate-name .av{width:32px; height:32px; border-radius:50%; flex:0 0 32px; display:grid; place-items:center; font-size:12.5px; font-weight:800;
  color:#fff; background:linear-gradient(145deg,var(--steel-600),var(--steel-800))}
.gate-link{margin-top:2px; border:0; background:transparent; color:var(--steel-600); font-size:12.5px; text-decoration:underline; cursor:pointer}
.gate-link:hover{color:var(--steel-700)}

@media print{
  .sidebar,.topbar,.pager,.quiz-body .opt .mk,.gate{display:none}
  .main{margin:0}
  .view{max-width:100%}
  .hero{color:#000; background:#fff; border:2px solid var(--steel-700)}
  .hero .kicker{color:#000}
}