/* Build With AI by Duke — workbook on grid paper, game-style progress */
:root{
  --paper:#FBFAF6; --card:#FFFFFF; --ink:#16182B; --muted:#5D6078; --line:#E4E2D8; --grid:rgba(31,59,179,.06);
  --blue:#1F3BB3; --blue-soft:#E8EDFF; --hl:#FFE45C; --hl-ink:#16182B; --coral:#E8512F; --coral-soft:#FFEAE4;
  --mint:#17885C; --mint-soft:#E1F5EA; --code:#14162A; --code-fg:#E9ECFF; --shadow:#16182B;
  --fd:"Bricolage Grotesque","Avenir Next",system-ui,sans-serif;
  --fb:"Figtree",-apple-system,"Helvetica Neue",Arial,sans-serif;
  --fm:"JetBrains Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --paper:#101225; --card:#181B33; --ink:#EEF0FF; --muted:#A3A7C6; --line:#2A2E4D; --grid:rgba(140,160,255,.05);
  --blue:#93A6FF; --blue-soft:#232A55; --coral:#FF8A6E; --coral-soft:#3A2220; --mint:#4FD39C; --mint-soft:#15382B;
  --code:#0A0B18; --shadow:#000; color-scheme:dark}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--fb);font-size:17px;line-height:1.65;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:28px 28px}
.wrap{max-width:900px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
h1,h2,h3,h4{font-family:var(--fd);line-height:1.12;margin:0;text-wrap:balance}
p{margin:0 0 12px}
a{color:var(--blue)}
img{max-width:100%}
:focus-visible{outline:3px solid var(--coral);outline-offset:2px;border-radius:6px}
.muted{color:var(--muted)} .small{font-size:14px} .center{text-align:center}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
code{font-family:var(--fm);font-size:.86em;background:var(--blue-soft);padding:1px 6px;border-radius:5px;word-break:break-word}
kbd{font-family:var(--fm);font-size:13px;background:var(--card);border:1.5px solid var(--ink);border-bottom-width:3px;border-radius:6px;padding:0 6px;white-space:nowrap;color:var(--ink)}
.eyebrow{font-family:var(--fm);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);display:block;margin-bottom:6px}
.tag{display:inline-block;font-family:var(--fm);font-size:12px;letter-spacing:.12em;text-transform:uppercase;background:var(--ink);color:var(--paper);padding:5px 10px;border-radius:4px}

/* HUD */
.hud{position:sticky;top:0;z-index:20;background:var(--card);border-bottom:2px solid var(--ink);padding-top:env(safe-area-inset-top)}
.hud-row{display:flex;align-items:center;gap:14px;padding-block:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-family:var(--fd);font-weight:800;font-size:16px;white-space:nowrap}
.brand em{font-style:normal;font-family:var(--fm);font-size:11px;background:var(--hl);color:var(--hl-ink);padding:2px 6px;border-radius:4px;margin-left:4px}
.logo{width:30px;height:30px;border-radius:9px;background:#16182B;color:#FFE45C;border:1.5px solid var(--ink);display:inline-grid;place-items:center;font-family:var(--fd);font-weight:800;font-size:16px}
.logo.sm{width:22px;height:22px;font-size:12px;border-radius:6px}
.hud .bar{flex:1;min-width:80px}
.bar{height:12px;border:2px solid var(--ink);border-radius:20px;overflow:hidden;background:var(--card)}
.fill{height:100%;background:var(--hl);transition:width .6s ease}
.xp{font-family:var(--fm);font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink);font-weight:600;font-size:15px;padding:6px 10px;border-radius:8px}
.nav a:hover{background:var(--blue-soft)}
.nav .muted-link{color:var(--muted)}
.dot{display:inline-grid;place-items:center;min-width:20px;height:20px;border-radius:10px;background:var(--coral);color:#fff;font-size:12px;padding:0 5px}
@media (max-width:640px){
  .hud .bar{order:3;flex-basis:100%}
  .nav{margin-left:0;order:2;width:100%;justify-content:space-between}
  .nav a{padding:6px 6px;font-size:14px}
  .xp{margin-left:auto}
}

main.wrap{padding-block:28px 40px}
.foot{color:var(--muted);font-size:14px;text-align:center;padding-block:20px 50px}
.page-title{font-size:clamp(30px,6vw,44px);font-weight:800;letter-spacing:-.02em;margin-bottom:18px}
h2.sec{font-size:24px;margin:34px 0 14px}
.back{display:inline-block;margin-bottom:14px;font-weight:600;text-decoration:none}

/* Flash */
.flash{border:2px solid var(--ink);border-radius:12px;padding:12px 16px;margin-bottom:20px;font-weight:600;background:var(--mint-soft)}
.flash-bad{background:var(--coral-soft)}

/* Buttons & forms */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:700;font-size:15px;border:2px solid var(--ink);background:var(--card);color:var(--ink);border-radius:10px;padding:10px 18px;cursor:pointer;box-shadow:3px 3px 0 var(--shadow);text-decoration:none;transition:transform .1s,box-shadow .1s}
.btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--shadow)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--shadow)}
.btn.primary{background:var(--blue);color:#fff}
@media (prefers-color-scheme:dark){.btn.primary{background:#3D57D6}}
.btn.big{font-size:17px;padding:14px 22px;text-align:left}
.btn.wide{width:100%}
label{display:block;font-weight:600;font-size:15px;margin:14px 0 6px}
input,textarea,select{width:100%;font:inherit;font-size:16px;color:var(--ink);background:var(--card);border:2px solid var(--line);border-radius:10px;padding:10px 12px}
input:focus,textarea:focus,select:focus{border-color:var(--ink);outline:none}
textarea{resize:vertical}
form .btn{margin-top:14px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row-end{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
@media (max-width:560px){.row{grid-template-columns:1fr}}

.card{display:block;background:var(--card);border:2px solid var(--ink);border-radius:16px;padding:20px 22px;margin-bottom:16px;box-shadow:5px 5px 0 var(--shadow);color:var(--ink)}
a.card{text-decoration:none}
.card h2{font-size:24px;margin-bottom:6px}
.card h3{font-size:19px;margin-bottom:6px}
.narrow{max-width:420px;margin:40px auto}
.narrow-left{max-width:480px}
.card.highlight{background:var(--hl);color:var(--hl-ink)}
.card.highlight .muted,.card.highlight .eyebrow{color:var(--hl-ink)}
.card.danger{border-color:var(--coral)}
.card.empty{text-align:center;padding-block:34px}
.card.notice{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;background:var(--coral-soft)}
.sendable{white-space:pre-wrap;font-family:var(--fm);font-size:14px;background:var(--card);color:var(--ink);border:2px solid var(--ink);border-radius:10px;padding:14px;margin:10px 0 0}

/* Login */
.login{display:grid;grid-template-columns:1.2fr 1fr;gap:34px;align-items:center;padding-block:30px}
.login h1{font-size:clamp(38px,7vw,62px);font-weight:800;letter-spacing:-.03em;margin:16px 0}
mark{background:linear-gradient(transparent 55%,var(--hl) 55%);color:inherit;padding:0 4px}
.lede{font-size:19px;color:var(--muted);max-width:52ch}
.login-card h2{font-size:28px}
@media (max-width:760px){.login{grid-template-columns:1fr}}

/* Home */
.home-hero{display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center;margin-bottom:26px}
.home-hero h1{font-size:clamp(34px,7vw,56px);font-weight:800;letter-spacing:-.03em;margin:14px 0 8px}
.home-hero .btn{margin-top:10px;max-width:100%}
@media (max-width:640px){.home-hero{grid-template-columns:1fr}.home-hero .ring{order:-1}}
.ring{--pct:0;width:120px;height:120px;border-radius:50%;display:grid;place-content:center;text-align:center;
  background:radial-gradient(closest-side,var(--card) 74%,transparent 75%),conic-gradient(var(--blue) calc(var(--pct)*1%),var(--line) 0);border:2px solid var(--ink);flex:none}
.ring b{font-family:var(--fd);font-size:26px;font-variant-numeric:tabular-nums;line-height:1}
.ring span{font-size:12px;color:var(--muted)}
.ring.big{width:160px;height:160px}.ring.big b{font-size:36px}
.howto{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:10px}
.howto div{border:2px dashed var(--blue);border-radius:12px;padding:12px 14px;background:var(--card)}
.howto b{display:block;font-family:var(--fd)}
.howto span{font-size:14px;color:var(--muted);line-height:1.4;display:block}
@media (max-width:640px){.howto{grid-template-columns:1fr}}
@media (max-width:480px){.map{grid-template-columns:1fr 1fr;gap:10px}.lvl{min-height:108px;padding:12px}.lvl-n{font-size:26px}.lvl-t{font-size:15px}}
.part-h{font-family:var(--fm);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--coral);margin:28px 0 10px;font-weight:600}
.map{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}
.map.single{margin-top:22px}
.lvl{display:flex;flex-direction:column;gap:2px;min-height:118px;padding:14px;border:2px solid var(--ink);border-radius:14px;background:var(--card);color:var(--ink);text-decoration:none;box-shadow:4px 4px 0 var(--shadow);transition:transform .15s,box-shadow .15s;position:relative}
a.lvl:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--shadow)}
.lvl-n{font-family:var(--fd);font-weight:800;font-size:30px;line-height:1;color:var(--blue)}
.lvl-t{font-weight:700;line-height:1.3;flex:1}
.lvl-s{font-family:var(--fm);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.lvl-cleared{background:var(--mint-soft)}
.lvl-cleared .lvl-s{color:var(--mint);font-weight:600}
.lvl-cleared::after{content:"✓";position:absolute;top:10px;right:12px;width:26px;height:26px;border-radius:50%;background:var(--mint);color:#fff;display:grid;place-items:center;font-weight:800}
.lvl-started{background:var(--hl);color:var(--hl-ink)}
.lvl-started .lvl-s,.lvl-started .lvl-n{color:var(--hl-ink)}
.lvl-locked{opacity:.5;box-shadow:none;border-style:dashed}
.lvl-locked::after{content:"🔒";position:absolute;top:10px;right:12px;font-size:16px}
.lvl-cert .lvl-n{color:var(--coral)}

/* Lesson opener */
.lesson .opener{padding:26px 0 30px;border-bottom:2px dashed var(--line);margin-bottom:26px}
.opener .part{font-family:var(--fm);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--coral)}
.opener .num{font-family:var(--fd);font-weight:800;font-size:clamp(90px,20vw,150px);line-height:.85;letter-spacing:-.05em;margin-top:14px}
.opener .num span{color:var(--blue)}
.opener h1{font-size:clamp(32px,6.5vw,52px);font-weight:800;letter-spacing:-.025em;margin-top:12px}
.opener .hook{font-size:19px;color:var(--muted);margin-top:12px;max-width:60ch}
.learn{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:16px 20px;box-shadow:5px 5px 0 var(--shadow);margin-top:20px}
.learn .eyebrow{color:var(--coral)}
.learn ul{margin:0;padding-left:20px}
.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.meta span{font-family:var(--fm);font-size:12px;background:var(--ink);color:var(--paper);padding:3px 10px;border-radius:5px}
.meta span.y{background:var(--hl);color:var(--hl-ink)}

/* Lesson content blocks (shared with the PDF guide) */
.content{font-size:17px}
.content h3{font-size:23px;font-weight:700;margin:34px 0 12px}
.content h4{font-size:18px;font-weight:700;margin:22px 0 8px}
.content ul,.content ol{padding-left:22px;margin:0 0 14px}
.content li{margin-bottom:6px}
.content li::marker{color:var(--blue);font-weight:700}
.analogy{background:var(--blue-soft);border-radius:14px;padding:16px 18px;margin:18px 0;display:grid;grid-template-columns:42px 1fr;gap:12px}
.analogy .ic{width:38px;height:38px;border-radius:50%;background:var(--blue);color:#fff;font-family:var(--fd);font-weight:800;display:grid;place-items:center}
@media (prefers-color-scheme:dark){.analogy .ic{color:var(--ink)}}
.analogy b.h{font-family:var(--fd);font-size:18px;display:block;margin-bottom:4px}
.analogy p:last-child{margin:0}
.tip{border-left:6px solid var(--coral);background:var(--coral-soft);padding:14px 18px;border-radius:0 12px 12px 0;margin:18px 0}
.tip .lbl,.duke .lbl,.mission .lbl{font-family:var(--fm);font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;display:block;margin-bottom:6px}
.tip .lbl{color:var(--coral)}
.tip p:last-child{margin:0}
.duke{background:#16182B;color:#FBFAF6;border-radius:14px;padding:18px 22px;margin:22px 0}
@media (prefers-color-scheme:dark){.duke{background:#05060F;border:2px solid var(--line)}}
.duke .lbl{color:#FFE45C}
.duke p{font-family:var(--fd);font-weight:700;font-size:20px;line-height:1.35;margin:0}
.mission{border:2px dashed var(--blue);border-radius:14px;padding:16px 20px;margin:22px 0;background:var(--card)}
.mission .lbl{color:var(--blue)}
.mission ol:last-child,.mission p:last-child{margin-bottom:0}
.check{list-style:none;padding:0!important}
.check li{padding-left:30px;position:relative}
.check li::before{content:"";position:absolute;left:0;top:5px;width:16px;height:16px;border:2px solid var(--ink);border-radius:4px;background:var(--card)}
.snip{background:var(--code);color:var(--code-fg);border-radius:12px;margin:12px 0 16px;overflow:hidden}
.snip .top{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid rgba(255,255,255,.1);font-family:var(--fm);font-size:11px;letter-spacing:.06em;color:#9DA2C8}
.snip .dots{display:flex;gap:6px}.snip .dots i{width:10px;height:10px;border-radius:50%;background:#FF5F57;display:block}
.snip .dots i:nth-child(2){background:#FEBC2E}.snip .dots i:nth-child(3){background:#28C840}
.snip pre{margin:0;padding:14px 16px;font-family:var(--fm);font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word}
.snip .c{color:#7E86BD}.snip .y{color:#FFE45C}
.snip.light{background:var(--card);color:var(--ink);border:2px solid var(--ink)}
.snip.light .top{border-bottom-color:var(--line);color:var(--muted)}
.snip.bad .top{color:#FF9A85}
.copy{font-family:var(--fm);font-size:12px;font-weight:600;background:#FFE45C;color:#16182B;border:0;border-radius:6px;padding:4px 10px;cursor:pointer;margin-left:auto}
.steps{list-style:none;padding:0!important;counter-reset:s}
.steps>li{counter-increment:s;display:grid;grid-template-columns:38px 1fr;gap:12px;margin-bottom:14px}
.steps>li::before{content:counter(s);width:32px;height:32px;border-radius:50%;border:2px solid var(--ink);display:grid;place-items:center;font-family:var(--fd);font-weight:800;background:var(--hl);color:var(--hl-ink)}
.steps>li>div{min-width:0}
.steps>li>div>p:last-child{margin-bottom:0}
.table-wrap{overflow-x:auto;margin:12px 0 18px}
.tbl{width:100%;border-collapse:separate;border-spacing:0;border:2px solid var(--ink);border-radius:12px;overflow:hidden;font-size:15px;margin:12px 0 18px;background:var(--card)}
.table-wrap .tbl{margin:0}
.tbl th,.tbl td{text-align:left;padding:10px 12px;vertical-align:top;border-bottom:1px solid var(--line)}
.tbl th{background:var(--blue-soft);font-family:var(--fd);font-size:15px}
.tbl tr:last-child td{border-bottom:0}
.content .tbl td:first-child{font-weight:600}
.tbl td.num{font-variant-numeric:tabular-nums;font-family:var(--fm);font-size:14px}
.content .tbl{display:block;overflow-x:auto}
.recipe{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:16px 0}
.recipe div{border:2px solid var(--ink);border-radius:12px;padding:12px 8px;text-align:center;background:var(--card)}
.recipe .L{font-family:var(--fd);font-weight:800;font-size:34px;color:var(--blue);line-height:1}
.recipe .w{font-weight:700;font-size:14px;margin-top:4px}
.recipe .d{font-size:12.5px;color:var(--muted);line-height:1.35;margin-top:4px}
@media (max-width:620px){.recipe{grid-template-columns:1fr 1fr}.recipe div:last-child{grid-column:span 2}}
.diagram{display:flex;gap:8px;margin:16px 0 20px;flex-wrap:wrap}
.diagram .box{flex:1 1 120px;border:2px solid var(--ink);border-radius:12px;padding:12px;background:var(--card);text-align:center;min-width:0}
.diagram .box b{font-family:var(--fd);display:block;font-size:17px}
.diagram .box span{font-size:14px;color:var(--muted);line-height:1.4;display:block;margin-top:4px}
.diagram .box.y{background:var(--hl);color:var(--hl-ink)}.diagram .box.y span{color:var(--hl-ink)}
.diagram .box.b{background:var(--blue-soft)}
.diagram .arr{display:flex;align-items:center;font-family:var(--fd);font-weight:800;font-size:22px;color:var(--blue)}
@media (max-width:620px){.diagram .arr{display:none}.diagram{flex-direction:column}.diagram .box{flex:none!important}}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.two>div{min-width:0}
@media (max-width:620px){.two{grid-template-columns:1fr}}

/* Challenge + ask boxes */
.box{border:2px solid var(--ink);border-radius:16px;padding:20px 22px;margin:30px 0;background:var(--card)}
.challenge-box{background:var(--blue-soft)}
.ask-box{border-style:dashed}

/* Quiz */
.quiz{border:2px solid var(--ink);border-radius:18px;overflow:hidden;background:var(--card);box-shadow:6px 6px 0 var(--shadow);margin:30px 0;scroll-margin-top:80px}
.qh{background:#FFE45C;color:#16182B;border-bottom:2px solid var(--ink);padding:16px 22px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.qh h2{font-size:24px;font-weight:800}
.qh span{font-family:var(--fm);font-size:12px}
.qb{padding:10px 22px 24px}
.q{border:0;border-bottom:1px dashed var(--line);padding:16px 0;margin:0;min-width:0}
.q legend{font-weight:700;font-size:17px;padding:0;margin-bottom:10px;float:left;width:100%}
.q legend span{font-family:var(--fd);color:var(--blue);margin-right:4px}
.q legend+*{clear:both}
.opt{display:grid;grid-template-columns:30px 1fr;align-items:center;gap:8px;font-weight:500;margin:8px 0 0;padding:10px 12px;border:2px solid var(--line);border-radius:10px;cursor:pointer;transition:border-color .15s,transform .1s;background:var(--card)}
.opt:hover{border-color:var(--ink);transform:translateX(2px)}
.opt input{position:absolute;opacity:0;pointer-events:none;width:1px}
.opt i{font-style:normal;width:26px;height:26px;border:2px solid var(--ink);border-radius:50%;display:grid;place-items:center;font-family:var(--fm);font-size:12px;font-weight:600}
.opt:has(input:checked){border-color:var(--blue);background:var(--blue-soft)}
.opt:has(input:checked) i{background:var(--blue);color:#fff;border-color:var(--blue)}
.opt:has(input:focus-visible){outline:3px solid var(--coral);outline-offset:2px}
.opt.right{border-color:var(--mint);background:var(--mint-soft)}
.opt.wrong{border-color:var(--coral);background:var(--coral-soft)}
.why{margin:10px 0 0;font-size:15px;padding:10px 14px;border-radius:10px;background:var(--blue-soft)}
.q-ok .why{background:var(--mint-soft)} .q-bad .why{background:var(--coral-soft)}
.result{display:flex;flex-direction:column;gap:6px;align-items:flex-start;border:2px solid var(--ink);border-radius:14px;padding:16px 18px;margin:12px 0 6px}
.result b{font-family:var(--fd);font-size:22px}
.result.win{background:var(--mint-soft)} .result.try{background:var(--coral-soft)}
.result .btn{margin-top:8px}
.pager{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:20px}

/* Questions */
.qa .q-body{font-weight:600;margin-bottom:10px}
.qa-open{border-color:var(--coral)}
.reply{background:var(--blue-soft);border-radius:12px;padding:12px 14px}
.reply .who{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px;margin-bottom:6px}
.reply-form{margin-top:10px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.chips a{border:2px solid var(--ink);border-radius:20px;padding:4px 12px;text-decoration:none;color:var(--ink);font-weight:600;font-size:14px;background:var(--card)}
.tk h2{font-size:30px;margin:36px 0 10px;scroll-margin-top:80px}

/* Admin */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:18px 0}
.stats div{border:2px solid var(--ink);border-radius:12px;padding:12px 14px;background:var(--card)}
.stats b{font-family:var(--fd);font-size:30px;display:block;line-height:1.1;font-variant-numeric:tabular-nums}
.stats span{font-size:13px;color:var(--muted)}
.student-list{display:grid;gap:10px;margin-bottom:24px}
.student-row{display:grid;grid-template-columns:1.2fr 1.5fr auto;gap:16px;align-items:center;margin:0;padding:14px 18px}
.student-row .who{display:flex;flex-direction:column;min-width:0}
.student-row .who b{font-size:17px}
.student-row .prog{display:flex;flex-direction:column;gap:4px;min-width:0}
@media (max-width:640px){.student-row{grid-template-columns:1fr}}
.student-head{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.student-head h1{font-size:clamp(30px,6vw,44px);font-weight:800}
.pill{font-family:var(--fm);font-size:11px;font-weight:600;padding:3px 8px;border-radius:20px;white-space:nowrap;border:1.5px solid var(--ink)}
.pill-cleared{background:var(--mint-soft);color:var(--mint);border-color:var(--mint)}
.pill-started{background:var(--hl);color:var(--hl-ink)}
.pill-locked{opacity:.55}
.answer{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:8px 0}
.actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}
.actions-grid .card{margin:0}
.add-student{margin-top:10px}

/* Certificate */
.cert{border:6px double var(--ink);border-radius:18px;padding:48px 28px;text-align:center;margin:20px auto;max-width:760px;
  background:radial-gradient(circle at 8% 10%,var(--blue-soft),transparent 35%),radial-gradient(circle at 92% 92%,var(--coral-soft),transparent 35%),var(--card)}
.cert .s{font-family:var(--fm);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.cert h1{font-size:clamp(34px,7vw,52px);font-weight:800;margin:14px 0}
.cert-name{font-family:var(--fd);font-weight:800;font-size:clamp(30px,7vw,48px);display:inline-block;border-bottom:4px solid #FFE45C;padding:0 12px;margin:8px 0 18px}
.cert-text{max-width:52ch;margin:0 auto}
.cert .sig{font-family:var(--fd);font-weight:700;font-style:italic;font-size:30px;margin-top:30px}
@media print{.hud,.foot,.btn,.flash{display:none!important}body{background:#fff}.cert{border-color:#000}}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}