:root{
  --navy:#1a3d63; --navy-d:#123055; --navy-deep:#0d2440;
  --ivory:#f6f4ee; --ivory-d:#efece2; --card:#fdfcf9; --card2:#f3efe4;
  --gold:#e0b25c; --gold-light:#f0cd8c; --gold-deep:#a8792a;
  --ink:#20283a; --text:#4f586c; --line:rgba(26,61,99,.14); --line2:rgba(26,61,99,.24);
  --on-navy:#f2ecdb; --on-navy-muted:#9fbab5; --terracotta:#a3432c;
  --ok:#2f7d5b; --ok-bg:rgba(47,125,91,.1);
  --k-pre:#2f8f5f; --k-pre-bg:rgba(95,214,155,.22);
  --k-root:#8a6410; --k-root-bg:rgba(240,194,78,.3);
  --k-suf:#2e6aa8; --k-suf-bg:rgba(111,182,240,.24);
  --athena:#8f6a17; --thor:#b8322c; --morpheus:#6b2a63; --luna:#1f3f8c;
  --serif:'Cormorant Garamond',Georgia,'Times New Roman',serif;
  --display:'Cinzel',Georgia,serif;
  --sans:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  --shadow:0 1px 2px rgba(18,48,85,.06),0 12px 28px -14px rgba(18,48,85,.22);
  --ease:cubic-bezier(.2,.8,.25,1.15);
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ivory:#0f1d31; --ivory-d:#0c1829; --card:#152740; --card2:#1b3150;
  --ink:#f2ecdb; --text:#b9c5d4; --line:rgba(240,205,140,.16); --line2:rgba(240,205,140,.3);
  --terracotta:#e79a7f; --ok:#7fd6ab; --ok-bg:rgba(127,214,171,.12);
  --k-pre:#8fe0b6; --k-root:#f0cd8c; --k-suf:#9cc9f2;
  --athena:#e0b25c; --thor:#f08a7e; --morpheus:#d59ad0; --luna:#9db8f5;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 28px -14px rgba(0,0,0,.6); color-scheme:dark}}
:root[data-theme="dark"]{
  --ivory:#0f1d31; --ivory-d:#0c1829; --card:#152740; --card2:#1b3150;
  --ink:#f2ecdb; --text:#b9c5d4; --line:rgba(240,205,140,.16); --line2:rgba(240,205,140,.3);
  --terracotta:#e79a7f; --ok:#7fd6ab; --ok-bg:rgba(127,214,171,.12);
  --k-pre:#8fe0b6; --k-root:#f0cd8c; --k-suf:#9cc9f2;
  --athena:#e0b25c; --thor:#f08a7e; --morpheus:#d59ad0; --luna:#9db8f5;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 28px -14px rgba(0,0,0,.6); color-scheme:dark}
*,*::before,*::after{box-sizing:inherit;margin:0;padding:0}
html{height:100%}
html{background:var(--ivory)}
body{min-height:100%;background:var(--ivory);color:var(--text);font-family:var(--sans);font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:8px}
b,strong{color:var(--ink)}

.top{position:sticky;top:0;z-index:20;background:rgba(18,48,85,.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid rgba(240,205,140,.16);padding-top:env(safe-area-inset-top,0px);margin-top:calc(-1 * env(safe-area-inset-top,0px))}
.top-in{max-width:820px;margin:0 auto;height:62px;padding:0 20px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--on-navy);font-family:var(--display);font-weight:700;font-size:15px;letter-spacing:.02em;white-space:nowrap}
.brand-mark{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:14px;background:radial-gradient(circle at 35% 30%,#2a5a8a,var(--navy-deep));border:1px solid rgba(240,205,140,.55)}
.top-lesson{margin-left:auto;display:flex;align-items:center;gap:10px;color:var(--on-navy-muted);font-size:14px;font-weight:600;text-align:right;line-height:1.3}
.top-lesson img{width:40px;height:40px}
@media (max-width:520px){.brand .word{display:none}}

.wrap{max-width:760px;margin:0 auto;padding:26px 20px 90px}
.dots{display:flex;gap:8px;justify-content:center;margin:0 0 22px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--line2);transition:transform .25s var(--ease),background-color .25s}
.dot.on{background:var(--acc);transform:scale(1.4)}
.dot.done{background:color-mix(in srgb,var(--acc) 55%,transparent)}
.stage{animation:enter .45s var(--ease) both}
@keyframes enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.kicker{font-family:var(--serif);font-style:italic;font-weight:600;font-size:20px;color:var(--terracotta)}
h1{font-family:var(--serif);font-weight:700;font-size:clamp(34px,7vw,50px);line-height:1.05;color:var(--ink);margin:4px 0 14px}
h2{font-family:var(--serif);font-weight:700;font-size:clamp(28px,5.4vw,36px);line-height:1.1;color:var(--ink);margin:4px 0 10px}
h3{font-family:var(--display);font-weight:700;font-size:19px;color:var(--ink);letter-spacing:.01em}
p{margin:0 0 14px}
.lead{font-size:19px}
.muted{color:var(--text)}

.bigword{font-family:var(--sans);font-weight:800;font-size:clamp(34px,10vw,72px);letter-spacing:.03em;line-height:1.05;color:var(--ink);text-align:center;margin:18px 0 22px;word-break:break-word}
.seg{border-radius:10px;padding:0 .08em}
.seg.hl{color:var(--acc);background:color-mix(in srgb,var(--acc) 14%,transparent)}
.seg.hl2{color:var(--acc);background:color-mix(in srgb,var(--acc) 8%,transparent)}
.seg.hl3{color:var(--acc)}
.seg.pre{color:var(--k-pre);background:var(--k-pre-bg)}
.seg.root{color:var(--k-root);background:var(--k-root-bg)}
.seg.suf{color:var(--k-suf);background:var(--k-suf-bg)}
.k-pre{color:var(--k-pre)!important}.k-root{color:var(--k-root)!important}.k-suf{color:var(--k-suf)!important}

.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;margin:16px 0;box-shadow:var(--shadow)}
.card.soft{background:color-mix(in srgb,var(--acc) 6%,var(--card));border-color:color-mix(in srgb,var(--acc) 26%,transparent)}
.card .eyebrow{font-family:var(--serif);font-style:italic;font-weight:600;font-size:18px;color:var(--terracotta);margin-bottom:4px}

.say{display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:center;margin:20px 0}
.say img{width:72px;height:72px}
.bubble{position:relative;background:var(--card);border:1px solid color-mix(in srgb,var(--acc) 35%,transparent);border-radius:18px;padding:14px 18px;font-family:var(--serif);font-style:italic;font-weight:600;font-size:21px;line-height:1.35;color:var(--ink);box-shadow:var(--shadow)}
.bubble::before{content:"";position:absolute;left:-8px;top:50%;width:14px;height:14px;background:var(--card);border-left:1px solid color-mix(in srgb,var(--acc) 35%,transparent);border-bottom:1px solid color-mix(in srgb,var(--acc) 35%,transparent);transform:translateY(-50%) rotate(45deg)}
.bubble small{display:block;font-family:var(--sans);font-style:normal;font-weight:700;font-size:13px;color:var(--text);margin-bottom:2px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);font-weight:800;font-size:18px;line-height:1.2;text-decoration:none;padding:17px 26px;border-radius:14px;border:1px solid transparent;cursor:pointer;transition:transform .2s var(--ease),box-shadow .25s ease,background-color .2s,opacity .2s}
.btn:active{transform:translateY(1px) scale(.98)}
.btn-gold{background:linear-gradient(170deg,var(--gold-light),var(--gold));color:#2a1d05;box-shadow:0 1px 0 rgba(255,255,255,.5) inset,0 10px 24px -10px rgba(224,178,92,.75)}
.btn-gold:hover{transform:translateY(-2px)}
.btn-block{display:flex;width:100%;margin-top:18px}
.btn-ghost{background:transparent;border-color:var(--line2);color:var(--ink);font-weight:700;font-size:16px;padding:13px 20px}
.btn-ghost:hover{background:color-mix(in srgb,var(--ink) 5%,transparent)}
.btn-small{font-size:15px;padding:10px 16px;border-radius:11px}
.row-btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}

/* discover */
.pieces{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin:18px 0}
.piece{background:var(--card);border:2px solid var(--line);border-radius:18px;padding:16px 10px 14px;text-align:center;cursor:pointer;box-shadow:var(--shadow);transition:transform .2s var(--ease),border-color .2s}
.piece:hover{transform:translateY(-3px)}
.piece[aria-pressed="true"]{border-color:var(--acc)}
.piece .em{font-size:30px;line-height:1;display:block;margin-bottom:8px}
.piece .pc{font-weight:800;font-size:24px;letter-spacing:.02em;color:var(--acc);display:block}
.piece .mn{font-size:14px;font-weight:600;color:var(--text)}
.piece .seen{display:block;font-size:12px;color:var(--ok);font-weight:700;min-height:18px;margin-top:4px}
.info h3{font-family:var(--sans);font-weight:800;font-size:24px;color:var(--acc)}
.info .words{font-weight:700;color:var(--ink);margin:8px 0 0}
.info .tip{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line2);font-size:16px}
.count{text-align:center;font-size:15px;color:var(--text);font-weight:600}

/* tasks */
.task-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:800;color:var(--acc);background:color-mix(in srgb,var(--acc) 10%,transparent);border:1px solid color-mix(in srgb,var(--acc) 30%,transparent);padding:4px 12px;border-radius:999px}
.of{font-size:14px;font-weight:700;color:var(--text)}
.prompt{font-family:var(--serif);font-weight:700;font-size:clamp(24px,4.8vw,30px);line-height:1.18;color:var(--ink);margin:6px 0 8px}
.intro{font-size:17px}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:16px 0 4px}
.opts.long{grid-template-columns:1fr}
.opt{background:var(--card2);border:2px solid var(--line);border-radius:14px;padding:15px 16px;font-weight:700;font-size:18px;color:var(--ink);cursor:pointer;text-align:center;transition:transform .15s var(--ease),border-color .15s,background-color .15s,opacity .2s}
.opts.long .opt{text-align:left;font-weight:600;font-size:17px;line-height:1.45}
.opt:hover{border-color:color-mix(in srgb,var(--acc) 50%,transparent)}
.opt:active{transform:scale(.97)}
.opt.word{font-size:21px;font-weight:800;letter-spacing:.02em}
.opt.right{background:var(--ok-bg);border-color:var(--ok);color:var(--ok)}
.opt.tried{opacity:.45;border-style:dashed}
.opt.sel{border-color:var(--acc);background:color-mix(in srgb,var(--acc) 10%,var(--card2))}
.opt:disabled{cursor:default}
.fb{min-height:30px;margin-top:12px;font-size:17px;font-weight:600}
.fb .ok{color:var(--ok)}
.fb .nudge{color:var(--terracotta)}
.hintbox{margin-top:12px;font-size:16px;background:color-mix(in srgb,var(--gold) 14%,transparent);border-radius:12px;padding:10px 14px;color:var(--ink)}
.linkbtn{background:none;border:0;color:var(--text);font-size:15px;font-weight:700;text-decoration:underline;text-underline-offset:3px;cursor:pointer;padding:6px 0}

.sort-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 0;border-bottom:1px solid var(--line)}
.sort-row:last-child{border-bottom:0}
.sort-word{font-weight:800;font-size:21px;color:var(--ink);min-width:150px;letter-spacing:.01em}
.sort-word .tick{color:var(--ok);margin-left:6px}
.sort-opts{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:2px solid var(--line);background:var(--card2);border-radius:999px;padding:7px 16px;font-weight:700;font-size:16px;color:var(--ink);cursor:pointer;transition:border-color .15s,background-color .15s}
.chip[aria-pressed="true"]{border-color:var(--acc);background:color-mix(in srgb,var(--acc) 14%,var(--card2))}
.chip.pre[aria-pressed="true"]{border-color:var(--k-pre);background:var(--k-pre-bg)}
.chip.root[aria-pressed="true"]{border-color:var(--k-root);background:var(--k-root-bg)}
.chip.suf[aria-pressed="true"]{border-color:var(--k-suf);background:var(--k-suf-bg)}

.slots{display:grid;gap:14px;margin:16px 0}
.slot-label{font-size:14px;font-weight:700;color:var(--text);margin-bottom:6px}
.assembled{text-align:center;font-weight:800;font-size:48px;white-space:nowrap;overflow:hidden;letter-spacing:.02em;color:var(--ink);min-height:62px;margin:8px 0;padding:10px;border:2px dashed var(--line2);border-radius:16px}
.assembled .gap{color:var(--line2)}

.sentence{font-size:22px;line-height:2.1;margin:16px 0}
.wbtn{display:inline;background:none;border:0;border-bottom:2px dotted var(--line2);padding:0 2px;margin:0 1px;font-size:22px;font-weight:600;color:var(--ink);cursor:pointer;border-radius:4px}
.wbtn:hover{background:color-mix(in srgb,var(--acc) 10%,transparent)}
.wbtn.found{border-bottom-color:var(--terracotta);color:var(--terracotta)}
.wbtn.fixed{border-bottom:0;color:var(--ok);background:var(--ok-bg);font-weight:800}

.parts{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:14px 0 4px}
.part{text-align:center}
.part .seg{display:inline-block;font-weight:800;font-size:clamp(30px,8vw,46px);letter-spacing:.02em;padding:2px 12px}
.part .m{display:block;font-size:15px;font-weight:700;color:var(--text);margin-top:4px}
.reveal{margin-top:14px;padding:16px 18px;border-radius:14px;background:color-mix(in srgb,var(--acc) 8%,var(--card2));border:1px solid color-mix(in srgb,var(--acc) 26%,transparent);font-size:17px}

.thor{display:grid;grid-template-columns:64px 1fr;gap:14px;align-items:center;margin:10px 0 6px}
.thor img{width:64px;height:64px}
.thor .bubble{font-size:20px}

.next-row{display:flex;justify-content:flex-end;margin-top:14px}

/* paper */
.tutor{background:color-mix(in srgb,var(--navy) 5%,var(--card));border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:14px;padding:16px 18px;margin:16px 0}
.tutor .th{font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--gold-deep);margin-bottom:6px}
.tutor p{font-size:16px;line-height:1.6}
.spell{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.spell button,.spell span{border:2px solid var(--line);background:var(--card);border-radius:12px;padding:8px 14px;font-weight:800;font-size:19px;color:var(--ink);letter-spacing:.02em}
.spell button{cursor:pointer}
.spell button[aria-pressed="true"]{border-color:var(--ok);background:var(--ok-bg);color:var(--ok)}
.hidden-words{font-size:15px;color:var(--text);font-style:italic;padding:10px 0}

/* finish */
.finale{text-align:center;padding-top:6px}
.finale .em{font-size:60px;display:block;margin-bottom:6px}
.plist{display:grid;gap:8px;margin-top:6px}
.plist div{display:flex;gap:12px;align-items:baseline}
.plist b{font-weight:800;color:var(--acc);min-width:80px;font-size:19px}
details.idea{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:8px}
details.idea>summary{list-style:none;cursor:pointer;padding:14px 16px;font-weight:700;font-size:17px;color:var(--ink);display:flex;align-items:center;gap:10px}
details.idea>summary::-webkit-details-marker{display:none}
details.idea>summary::after{content:'+';margin-left:auto;color:var(--gold-deep);font-size:22px;line-height:1}
details.idea[open]>summary::after{content:'\2212'}
details.idea .mins{font-size:13px;font-weight:600;color:var(--text)}
details.idea .body{padding:0 16px 16px;font-size:16px;line-height:1.65}
.foot{text-align:center;font-size:14px;color:var(--text);margin-top:36px}
.foot a{color:var(--ink);font-weight:700}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media (max-width:560px){
  .wrap{padding:20px 16px 80px}
  .sort-word{min-width:100%}
  .say{grid-template-columns:56px 1fr}.say img{width:56px;height:56px}
  .bubble{font-size:19px}
}

/* ============== App shell (dashboard, login, header) ============== */
header.top-bar{position:sticky;top:0;z-index:30;background:linear-gradient(180deg,var(--navy),var(--navy-d));border-bottom:1px solid rgba(240,205,140,.18);height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 max(4vw,18px);padding-top:env(safe-area-inset-top,0px);margin-top:calc(-1 * env(safe-area-inset-top,0px))}
.brand{display:flex;gap:10px;align-items:center;color:var(--on-navy);text-decoration:none}
.brand .mark{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-size:15px;background:radial-gradient(circle at 35% 30%,#2a5a8a,var(--navy-deep));border:1px solid rgba(240,205,140,.55);color:var(--gold-light)}
.brand .word{font-family:var(--display);font-weight:700;font-size:16px;letter-spacing:.01em}
.brand .word small{font-weight:400;opacity:.8;font-size:13px}
#signout{background:transparent;border:1px solid rgba(240,205,140,.4);color:var(--on-navy);font-weight:700;font-size:14px;padding:9px 16px;border-radius:10px;cursor:pointer;font-family:var(--sans)}
#signout:hover{background:rgba(240,205,140,.1)}
[hidden]{display:none!important}
main.shell{max-width:1080px;margin:0 auto;padding:32px 20px 90px;min-height:calc(100vh - 160px)}
body{background:var(--ivory);color:var(--text);font-family:var(--sans);margin:0}

/* login */
.login{max-width:460px;margin:40px auto;padding:40px 34px;background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);text-align:center}
.login .sigil{font-size:42px;color:var(--gold-deep)}
.login .eyebrow{font-family:var(--serif);font-style:italic;font-weight:600;color:var(--terracotta);font-size:18px;display:block;margin:10px 0 2px}
.login h1{font-family:var(--serif);font-weight:700;font-size:clamp(30px,7vw,40px);margin:6px 0 12px;color:var(--ink)}
.login>p{line-height:1.6;color:var(--text)}
.login form{text-align:left;margin-top:22px}
.login label{display:block;font-weight:700;margin-bottom:8px;color:var(--ink);font-size:14px}
.login input{width:100%;padding:14px 15px;border:1px solid var(--line2);border-radius:12px;font:inherit;font-size:17px;background:var(--card2);color:var(--ink)}
.login input:focus-visible{outline:3px solid var(--gold);outline-offset:1px}
.login button[type=submit]{display:flex;width:100%;align-items:center;justify-content:center;gap:8px;margin-top:16px;background:linear-gradient(170deg,var(--gold-light),var(--gold));color:#2a1d05;font-weight:800;font-size:17px;padding:14px 20px;border:0;border-radius:12px;cursor:pointer;box-shadow:0 10px 22px -10px rgba(224,178,92,.75)}
#error{color:#a23b3b;min-height:1.4em;font-size:14px;font-weight:600;margin-top:10px}

/* dashboard welcome + stat */
.welcome{background:linear-gradient(160deg,var(--navy),var(--navy-d));border-radius:22px;padding:38px 36px;color:var(--on-navy);position:relative;overflow:hidden}
.welcome .eyebrow{font-family:var(--serif);font-style:italic;font-weight:600;color:var(--gold-light);font-size:18px}
.welcome h1{font-family:var(--serif);font-weight:700;color:var(--on-navy);font-size:clamp(28px,5vw,40px);margin:8px 0 10px}
.welcome p{max-width:620px;line-height:1.6;color:var(--on-navy-muted)}
.stat{display:inline-flex;align-items:center;gap:9px;margin-top:16px;background:rgba(255,255,255,.08);padding:10px 18px;border-radius:11px;border:1px solid rgba(240,205,140,.2)}
.stat strong{font-family:var(--display);font-size:24px;color:var(--gold-light)}
.stat span{color:var(--on-navy-muted);font-size:14px}

.section-head{margin:42px 0 16px}
.section-head h2{font-family:var(--serif);font-weight:700;color:var(--ink);font-size:26px;margin:0}
.section-head p{margin:6px 0 0;color:var(--text);font-size:15px}

/* teacher cards */
.teachers{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.teacher{border-radius:18px;padding:20px 18px;background:var(--card);border:1px solid var(--line);border-top:4px solid var(--colour);box-shadow:var(--shadow)}
.teacher .icon{font-size:28px;display:block}
.teacher h3{font-family:var(--display);font-weight:700;font-size:18px;margin:10px 0 4px;color:var(--ink)}
.teacher p{font-size:13.5px;line-height:1.5;color:var(--text);margin:0}

/* lesson list, grouped by teacher */
.teacher-group{margin-bottom:30px}
.teacher-group .group-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.teacher-group .group-head img{width:34px;height:34px;border-radius:50%;border:2px solid var(--colour)}
.teacher-group .group-head h3{font-family:var(--display);font-weight:700;font-size:17px;color:var(--colour);margin:0}
.teacher-group .group-head span{font-size:13px;color:var(--text)}
.lessons{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}
.card{border-radius:16px;padding:18px 19px;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .18s var(--ease),border-color .18s}
.card:hover{transform:translateY(-2px);border-color:var(--line2)}
.card .tag{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--gold-deep)}
.card h3{font-family:var(--serif);font-weight:700;font-size:19px;margin:6px 0 5px;color:var(--ink);line-height:1.2}
.card p{font-size:13.5px;line-height:1.5;color:var(--text);margin:0 0 12px;flex:1}
.card .done{color:var(--ok);font-weight:700;font-size:13px;margin:0 0 10px}
.card button{margin-top:auto;background:linear-gradient(170deg,var(--gold-light),var(--gold));color:#2a1d05;font-weight:800;border:0;padding:11px 16px;border-radius:10px;cursor:pointer;font-size:14.5px;font-family:var(--sans)}
.card button:hover{filter:brightness(1.05)}

/* activities placeholder */
.activity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.activity{background:var(--card2);border:1px dashed var(--line2);border-radius:14px;padding:16px 17px;color:var(--text)}
.activity strong{color:var(--ink);display:block;margin-bottom:4px;font-size:14.5px}
.activity p{margin:0;font-size:12.5px;color:var(--text);opacity:.85}

.text-button{background:none;border:0;color:var(--terracotta);font-weight:700;cursor:pointer;font-size:15px;padding:8px 0;font-family:var(--sans)}

footer.app-foot{text-align:center;color:var(--text);padding:26px;border-top:1px solid var(--line);font-size:13px;background:var(--ivory)}

@media (max-width:860px){.teachers{grid-template-columns:repeat(2,1fr)}.activity-grid{grid-template-columns:repeat(2,1fr)}.lessons{grid-template-columns:1fr}}
@media (max-width:520px){.teachers{grid-template-columns:1fr}.activity-grid{grid-template-columns:1fr}.login{padding:28px 22px}}

/* lesson view chrome */
#lesson .top-lesson{display:flex;align-items:center;justify-content:space-between;gap:14px;max-width:760px;margin:0 auto 6px;padding-top:6px}
#lesson .top-lesson .eyebrow{font-family:var(--serif);font-style:italic;font-weight:600;color:var(--terracotta);font-size:15px}
#view{max-width:760px;margin:0 auto}

/* accent colour per lesson, set via data-accent on <html> instead of inline style (CSP-safe) */
:root[data-accent="thor"]{--acc:var(--thor)}
:root[data-accent="athena"]{--acc:var(--athena)}
:root[data-accent="morpheus"]{--acc:var(--morpheus)}
:root[data-accent="luna"]{--acc:var(--luna)}

/* small utility classes replacing one-off inline styles (CSP-safe) */
.m0{margin:0}
.mt6{margin-top:6px}
.info-mean{font-weight:600;color:var(--text);font-size:18px}

/* build-task assembled word: bucketed sizes instead of a JS-computed inline font-size (CSP-safe) */
.assembled.len-s{font-size:clamp(30px,8.5vw,48px)}
.assembled.len-m{font-size:clamp(24px,6.5vw,36px)}
.assembled.len-l{font-size:clamp(19px,5vw,28px)}
.assembled.len-xl{font-size:clamp(15px,3.8vw,22px)}

/* teacher colour, set via data-teacher instead of inline style (CSP-safe) */
[data-teacher="Thor"]{--colour:var(--thor)}
[data-teacher="Athena"]{--colour:var(--athena)}
[data-teacher="Luna"]{--colour:var(--luna)}
[data-teacher="Morpheus"]{--colour:var(--morpheus)}