:root{
  --brand:#1B3F72;--brand-dark:#122B52;
  --sky:#2F6FBE;--sky-tint:#EAF2FC;
  --amber:#E2A23A;--amber-dark:#C2841F;
  --ink:#182335;--muted:#5B6472;--line:#E1E4EA;--bg:#F6F7F9;
  --warn:#b45309;--bad:#b91c1c;--ok:#15803d;
  --radius:12px;--radius-sm:8px;
  --font-head:"Lexend",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--font-head);font-weight:600;letter-spacing:-.01em;line-height:1.2}
a{color:var(--sky)}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}

header.top{background:#fff;border-bottom:1px solid var(--line);padding:14px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;position:sticky;top:0;z-index:20}
.logo{font-family:var(--font-head);font-weight:700;font-size:1.3rem;color:var(--brand);text-decoration:none;letter-spacing:-.01em}
.logo span{color:var(--amber)}
#nav{display:flex;gap:16px;align-items:center;font-size:.9rem;flex-wrap:wrap}
#nav a{color:var(--ink);text-decoration:none;font-weight:500}
#nav a:hover{color:var(--brand)}

main{max-width:860px;margin:0 auto;padding:20px}
h1{font-size:1.6rem;margin:.5rem 0}
h2{font-size:1.2rem;margin:0 0 .75rem}
h3{font-size:1rem;margin:0 0 .25rem;font-family:var(--font-head);font-weight:600}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:0 0 16px;box-shadow:0 1px 2px rgba(24,35,53,.04)}
label{display:block;font-weight:600;font-size:.9rem;margin:.75rem 0 .25rem}
input,select,textarea{width:100%;padding:10px;border:1px solid #cbd5e1;border-radius:var(--radius-sm);font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--sky)}
textarea{min-height:80px}
input[type=checkbox],input[type=radio]{width:auto;margin-right:6px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-weight:400;margin:0;border:1px solid var(--line);border-radius:999px;padding:4px 12px;background:#fff}

button,.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:var(--radius-sm);padding:11px 18px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;margin-top:.75rem;transition:background .15s ease, transform .05s ease}
button:hover,.btn:hover{background:var(--brand-dark)}
button:active,.btn:active{transform:translateY(1px)}
button.small{padding:6px 10px;font-size:.85rem;margin:0 4px 0 0}
button.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
button.ghost:hover{background:var(--sky-tint)}
button.danger{background:#fff;color:var(--bad);border:1px solid var(--bad)}
button.danger:hover{background:#fef2f2}
.btn-amber{background:var(--amber);color:#1a1200}
.btn-amber:hover{background:var(--amber-dark)}

.row{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:640px){.row{grid-template-columns:1fr 1fr}.row.three{grid-template-columns:1fr 1fr 1fr}}
.msg{margin-top:.75rem;font-size:.9rem;min-height:1.2em}
.msg.ok{color:var(--ok)}.msg.bad{color:var(--bad)}
.banner{border-radius:10px;padding:12px 14px;margin-bottom:16px;font-weight:600}
.banner.pending{background:#fef3c7;color:var(--warn)}
.banner.approved{background:#dcfce7;color:var(--ok)}
.banner.rejected,.banner.suspended{background:#fee2e2;color:var(--bad)}
.item{border-top:1px solid var(--line);padding:12px 0}
.item:first-child{border-top:0}
.muted{color:var(--muted);font-size:.9rem}
.tag{display:inline-block;font-size:.75rem;font-weight:700;border-radius:999px;padding:2px 10px;background:var(--sky-tint);color:var(--brand)}
.hidden{display:none !important}

/* ---------- Homepage: hero ---------- */
.hero-split{display:grid;gap:28px;align-items:center;padding:28px 0 8px;grid-template-columns:1fr}
@media(min-width:760px){.hero-split{grid-template-columns:1.1fr 1fr;padding:48px 0 16px}}
.hero-copy h1{font-size:1.9rem;margin:0 0 .6rem}
@media(min-width:760px){.hero-copy h1{font-size:2.5rem}}
.hero-copy p{color:var(--muted);font-size:1.05rem;max-width:46ch;margin:0 0 1.25rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}
.hero-actions .btn{margin-top:0}
.trust-strip{display:flex;flex-wrap:wrap;gap:18px;margin-top:1.5rem;padding-top:1.2rem;border-top:1px solid var(--line);font-size:.85rem;color:var(--muted)}
.trust-strip span{display:flex;align-items:center;gap:6px}
.trust-strip svg{flex:none;color:var(--brand)}
.hero-art{display:flex;justify-content:center}
.hero-art svg{width:100%;max-width:380px;height:auto}

/* ---------- Homepage: steps ---------- */
.steps{counter-reset:step;list-style:none;padding:0;margin:0 0 8px;display:grid;gap:0}
@media(min-width:720px){.steps{grid-template-columns:repeat(4,1fr);gap:18px}}
.steps li{counter-increment:step;position:relative;padding:0 0 18px 44px;border-left:2px solid var(--line)}
@media(min-width:720px){.steps li{padding:40px 0 0;border-left:0;border-top:3px solid var(--line)}}
.steps li:last-child{border-left-color:transparent}
.steps li::before{content:counter(step);position:absolute;left:-15px;top:0;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-family:var(--font-head);font-weight:600;font-size:.85rem;display:flex;align-items:center;justify-content:center}
@media(min-width:720px){.steps li::before{left:0;top:-16px}}
.steps h3{margin:0 0 .3rem;font-size:1rem}
.steps p{margin:0;color:var(--muted);font-size:.9rem}

/* ---------- Homepage: safety list ---------- */
.safe-list{display:grid;gap:14px;list-style:none;padding:0;margin:0}
@media(min-width:640px){.safe-list{grid-template-columns:1fr 1fr}}
.safe-list li{display:flex;gap:12px;align-items:flex-start}
.safe-list svg{flex:none;margin-top:2px;color:var(--ok)}
.safe-list p{margin:0;font-size:.95rem}

/* ---------- Footer ---------- */
footer.site{border-top:1px solid var(--line);margin-top:32px;padding:28px 20px;background:#fff}
footer.site .foot-inner{max-width:860px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:center;color:var(--muted);font-size:.85rem}
footer.site a{color:var(--muted)}

/* ---------- WhatsApp floating button ---------- */
.wa-fab{position:fixed;right:18px;bottom:18px;width:54px;height:54px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.25);z-index:50;text-decoration:none}
.wa-fab:hover{filter:brightness(1.05)}
.wa-fab svg{width:28px;height:28px}
@media print{.wa-fab{display:none}}

.sess{display:flex;gap:8px;align-items:flex-start;font-weight:400;margin:0;padding:8px 0;border-top:1px solid var(--line)}
.sess input{margin-top:5px}
.note{background:var(--sky-tint);border:1px solid #bcd7f5;border-radius:10px;padding:10px 12px;font-size:.9rem;margin:.75rem 0}
.alert{background:#fef2f2;border:1px solid #fecaca;border-radius:10px;padding:10px 12px;font-size:.9rem;margin:.75rem 0}
.tag.full{background:#fee2e2;color:var(--bad)}
.tag.good{background:#dcfce7;color:var(--ok)}
.check{display:flex;gap:8px;align-items:flex-start;font-weight:400}
.check input{margin-top:5px}
.box{border:1px solid var(--line);border-radius:10px;padding:12px;margin:12px 0}
ol.rules{padding-left:20px;margin:.5rem 0}
ol.rules li{margin:.25rem 0}
.total{font-weight:700;margin-top:.75rem}

body.classroom main{max-width:1280px}
.stagebar{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:8px 0}
.stagebar button{margin:0}
#wbTools{display:inline-flex;flex-wrap:wrap;gap:6px;align-items:center}
#stageGrid{display:grid;gap:8px}
#room{height:70vh;min-height:360px;border-radius:12px;overflow:hidden;background:#0f172a}
#stageGrid.split #room{height:42vh;min-height:260px}
@media(min-width:900px){#stageGrid.split{grid-template-columns:1fr 1fr}#stageGrid.split #room{height:70vh}}
#boardWrap{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;align-self:start}
#board{display:block;width:100%;aspect-ratio:4/3;touch-action:none;cursor:crosshair;background:#fff}
#board.locked{cursor:not-allowed}
.swatch{width:28px;height:28px;border-radius:50%;padding:0;border:2px solid #fff;box-shadow:0 0 0 1px var(--line)}
.swatch.on{box-shadow:0 0 0 3px var(--brand)}
#wbEraser.on{background:var(--brand);color:#fff}
.tag.req{background:#fef3c7;color:#92400e}
.row-inline{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.row-inline input{flex:1;min-width:140px;margin:0}
.terms-box{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:12px 0;background:var(--bg)}
.terms-box p{margin:.2rem 0 .5rem}
.steps-line{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0 0 16px;counter-reset:st}
.steps-line li{counter-increment:st;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:.85rem}
.steps-line li::before{content:counter(st) ". ";font-weight:700;color:var(--brand)}
.opts{display:grid;gap:8px;grid-template-columns:1fr}
@media(min-width:640px){.opts{grid-template-columns:1fr 1fr}}
.opt{display:flex;gap:8px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:0;font-weight:400;cursor:pointer;background:#fff}
.opt:has(input:checked){border-color:var(--brand);box-shadow:0 0 0 2px var(--sky-tint)}
.opt input{margin-top:5px}
.slots{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}
.slot{margin:0;display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:#fff;color:var(--ink);border:1px solid var(--line);border-left-width:5px;padding:8px 10px;font-weight:400;text-align:left}
.slot strong{font-size:1rem}
.slot span{font-size:.75rem;color:var(--muted)}
.slot:hover{background:var(--sky-tint)}
.slot.ok{border-left-color:#16a34a}
.slot.grp{border-left-color:#2563eb}
.slot.none{border-left-color:#d1d5db}
.slot.off{opacity:.5;cursor:not-allowed;background:var(--bg)}
.slot.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.slot.on span{color:#dbe8fb}
.legend{font-size:.8rem;color:var(--muted);margin:.5rem 0 0}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;vertical-align:middle}
.dot.ok{background:#16a34a}.dot.grp{background:#2563eb}.dot.none{background:#d1d5db}
.basket-line{display:flex;justify-content:space-between;gap:8px;align-items:center;flex-wrap:wrap}
.btn.small-btn{margin:0 0 0 4px;padding:6px 12px;font-size:.85rem}
button:disabled{opacity:.5;cursor:not-allowed}
.tiles{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));margin-bottom:16px}
.tile{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;text-decoration:none;color:var(--ink)}
.tile b{display:block;font-size:1.6rem;color:var(--brand);font-family:var(--font-head)}
.tile.warn b{color:var(--warn)}
.alloc{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:10px 0;background:#fff}

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