/* FunScience shared styles. Layout: app bar + unit nav, then 3D stage left / field-guide panel right; stacks on phones. */
@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Bricolage+Grotesque:opsz,wght@12..96,600;12..96,800&family=DM+Mono:wght@400;500&display=swap');

:root{
  --bg:#ECF0E4; --surface:#FAFCF5; --surface-2:#F2F5EC; --ink:#1B2A21; --muted:#56675B; --line:#CBD4C3;
  --forest:#2D6A44; --forest-ink:#FFFFFF; --sun:#C98A12; --matter:#22807F;
  --stage-top:#CFE3EA; --stage-bottom:#E9F0DF;
  --producer:#3B934B; --primary:#B48A10; --secondary:#C65A22; --tertiary:#A8343F; --decomposer:#73559A; --source:#C98A12; --abiotic:#4D7EA8;
  --good:#2D7A3E; --bad:#B23A3A; --warn:#A36A00;
  --display:'Bricolage Grotesque','Trebuchet MS',system-ui,sans-serif;
  --body:'Atkinson Hyperlegible','Segoe UI',system-ui,sans-serif;
  --mono:'DM Mono',ui-monospace,'Cascadia Mono',Menlo,monospace;
  --r:14px;
}
@media (prefers-color-scheme: dark){ :root{
  --bg:#0F1712; --surface:#17221B; --surface-2:#1C2920; --ink:#E5EEDF; --muted:#9DB1A3; --line:#2D3C32;
  --forest:#6FBF86; --forest-ink:#0F1712; --sun:#F0B53A; --matter:#57C4BF;
  --stage-top:#132029; --stage-bottom:#16231A;
  --producer:#6CC27B; --primary:#E2BC3E; --secondary:#EE8A4F; --tertiary:#E46A74; --decomposer:#B095D8; --source:#F0B53A; --abiotic:#7FB0DA;
  --good:#6FC783; --bad:#EE7474; --warn:#F0B53A; color-scheme:dark }}

*{box-sizing:border-box}
html,body{margin:0;background:var(--bg)}
body{color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--forest)}
h1,h2,h3{font-family:var(--display);text-wrap:balance;margin:0;line-height:1.1}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
.wrap{max-width:1320px;margin:0 auto;padding-inline:16px;padding-block:0 40px}

/* app bar */
.appbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.crumbs{display:flex;align-items:center;gap:8px;min-width:0;font-weight:700}
.crumbs a{text-decoration:none}
.crumbs .logo{font-family:var(--display);font-weight:800;font-size:1.1rem;color:var(--forest);display:inline-flex;align-items:center;gap:7px}
.crumbs .logo img{width:22px;height:22px}
.crumbs .sep{color:var(--line)}
.crumbs .unitlink{color:var(--muted)}
.userchip{display:flex;align-items:center;gap:8px;font-size:.9rem;min-width:0}
.userchip .who{display:flex;flex-direction:column;line-height:1.2;text-align:right;min-width:0}
.userchip .who small{color:var(--muted);font-size:.78rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.userchip img{width:30px;height:30px;border-radius:50%}
.unitnav{display:flex;gap:6px;overflow-x:auto;padding-block:10px 4px;scrollbar-width:thin}
.unitnav a{flex:none;border:1px solid var(--line);background:var(--surface);padding:7px 13px;border-radius:999px;text-decoration:none;color:var(--ink);font-weight:700;font-size:.88rem;display:inline-flex;align-items:center;gap:6px}
.unitnav a[aria-current="page"]{background:var(--forest);color:var(--forest-ink);border-color:var(--forest)}
.unitnav a .done{width:16px;height:16px;border-radius:50%;background:var(--good);color:var(--bg);font-size:.66rem;display:inline-grid;place-items:center}
.unitnav a[aria-current="page"] .done{background:var(--forest-ink);color:var(--forest)}

.pagehead{padding-block:14px 12px;display:grid;gap:4px}
.pagehead h1{font-size:clamp(1.6rem,3.4vw,2.3rem);font-weight:800;letter-spacing:-.02em}
.pagehead .lede{max-width:72ch;color:var(--muted);margin:0}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* layout */
.split{display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:16px;align-items:start}
@media (max-width:920px){.split{grid-template-columns:1fr}}

/* 3D stage */
.stage{position:relative;width:100%;height:min(68vh,620px);min-height:340px;border-radius:var(--r);overflow:hidden;background:linear-gradient(180deg,var(--stage-top),var(--stage-bottom));border:1px solid var(--line);user-select:none;-webkit-user-select:none}
.stage canvas{display:block;width:100%;height:100%;touch-action:none;outline:none}
.stage.hovering canvas{cursor:pointer}
.stage .labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.lbl{position:absolute;left:0;top:0;transform:translate(-50%,-100%);white-space:nowrap;font-size:.74rem;font-weight:700;padding:3px 8px;border-radius:999px;background:var(--surface);color:var(--ink);border:1px solid var(--line);display:flex;align-items:center;gap:5px;pointer-events:auto;cursor:pointer;box-shadow:0 2px 6px rgb(0 0 0 / .12);transition:opacity .2s}
.lbl i{width:8px;height:8px;border-radius:50%;display:inline-block;flex:none}
.lbl.sel{border-color:var(--ink);box-shadow:0 0 0 2px var(--sun)}
.lbl em{font-style:normal;font-family:var(--mono);font-weight:500;font-size:.68rem;color:var(--bad)}
.lbl.dim{opacity:.55}
.lbl.gone{opacity:.75;text-decoration:line-through}
.stage .overlay-top{position:absolute;top:10px;left:10px;right:10px;display:flex;flex-wrap:wrap;gap:6px;pointer-events:none}
.stage .overlay-top>*{pointer-events:auto}
.pill{border:1px solid var(--line);background:var(--surface);padding:6px 11px;border-radius:999px;font-size:.85rem;font-weight:700;cursor:pointer}
.pill[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.stage .hint{position:absolute;left:10px;bottom:10px;font-family:var(--mono);font-size:.72rem;color:var(--muted);background:var(--surface);padding:4px 9px;border-radius:8px;border:1px solid var(--line);max-width:calc(100% - 180px)}
.stage .tools{position:absolute;right:10px;bottom:10px;display:flex;gap:6px}
.stage .tools button{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:5px 9px;font-size:.78rem;cursor:pointer;font-weight:700}
.nogl{position:absolute;inset:0;display:grid;place-items:center;padding:24px;text-align:center;color:var(--muted)}
.toast{position:absolute;left:50%;top:56px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:8px 14px;border-radius:10px;font-weight:700;font-size:.9rem;pointer-events:none;opacity:0;transition:opacity .25s;white-space:nowrap;max-width:90%;overflow:hidden;text-overflow:ellipsis}
.toast.show{opacity:1}

/* panel */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:14px;min-width:0}
.panel h2{font-size:1.45rem}
.panel h3{font-size:1rem;font-family:var(--body);font-weight:700}
.panel p{margin:0}
.role{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:.82rem;padding:3px 10px;border-radius:999px;border:1.5px solid currentColor;width:fit-content}
.role i{width:9px;height:9px;border-radius:50%;background:currentColor}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{border:1px solid var(--line);background:var(--surface-2);border-radius:999px;padding:4px 10px;font-size:.85rem;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.chip i{width:8px;height:8px;border-radius:50%}
.chip.static{cursor:default}
.note{background:var(--surface-2);border-radius:10px;padding:10px 12px;font-size:.92rem}
.note b.k{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--forest);display:block;margin-bottom:2px}
.legend{display:grid;gap:6px}
.legend div{display:flex;align-items:center;gap:8px;font-size:.92rem}
.legend i{width:12px;height:12px;border-radius:50%;flex:none}
details.check{border:1px dashed var(--line);border-radius:10px;padding:10px 12px}
details.check summary{cursor:pointer;font-weight:700}
details.check p{margin-top:8px}
.impact{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.impact li{display:grid;grid-template-columns:auto 1fr;gap:8px;align-items:start;font-size:.92rem}
.tag{font-family:var(--mono);font-size:.68rem;padding:2px 7px;border-radius:6px;white-space:nowrap;border:1px solid currentColor;margin-top:2px}
.tag.c{color:var(--bad)} .tag.d{color:var(--secondary)} .tag.u{color:var(--good)} .tag.x{color:var(--muted)}
.btn{border:1px solid var(--line);background:var(--surface-2);border-radius:10px;padding:8px 14px;font-weight:700;cursor:pointer;text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.btn.primary{background:var(--forest);color:var(--forest-ink);border-color:var(--forest)}
.btn.small{padding:5px 10px;font-size:.85rem;border-radius:8px}
.btn:disabled{opacity:.5;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.stat{background:var(--surface-2);border-radius:10px;padding:8px 10px;min-width:0}
.stat span{display:block;font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.stat strong{font-family:var(--display);font-size:1.45rem;font-variant-numeric:tabular-nums}
.ctl{display:grid;gap:4px}
.ctl label{display:flex;justify-content:space-between;font-weight:700;font-size:.9rem}
.ctl output{font-family:var(--mono);font-weight:500}
input[type=range]{width:100%;accent-color:var(--forest)}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{flex:1;border:0;background:var(--surface-2);padding:7px 6px;cursor:pointer;font-weight:700;font-size:.88rem}
.seg button+button{border-left:1px solid var(--line)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.box{margin-top:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.tablewrap{overflow-x:auto}
table.data{border-collapse:collapse;width:100%;font-size:.9rem}
table.data th,table.data td{padding:7px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
table.data th{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:500}
table.data td.n{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--mono)}

/* turn-in card */
.turnin{border:1.5px solid var(--forest);border-radius:var(--r);padding:16px;display:grid;gap:12px;background:var(--surface)}
.turnin h3{font-family:var(--display);font-size:1.15rem;font-weight:800}
.turnin .q{display:grid;gap:6px}
.turnin .q label{font-weight:700;font-size:.95rem}
.turnin textarea{width:100%;min-height:84px;border:1px solid var(--line);border-radius:10px;padding:9px 11px;background:var(--surface-2);resize:vertical;line-height:1.45}
.turnin .status{font-size:.88rem;color:var(--muted)}
.turnin .status.ok{color:var(--good);font-weight:700}
.turnin .status.err{color:var(--bad);font-weight:700}
.turnin .auto{font-family:var(--mono);font-size:.8rem;color:var(--muted);background:var(--surface-2);border-radius:8px;padding:8px 10px}

/* modal */
.modal{position:fixed;inset:0;background:rgb(10 20 14 / .55);display:grid;place-items:center;padding:16px;z-index:50}
.modal .card{background:var(--surface);border-radius:var(--r);border:1px solid var(--line);padding:22px;max-width:420px;width:100%;display:grid;gap:12px}
.modal input{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--surface-2);font-family:var(--mono);font-size:1.3rem;letter-spacing:.2em;text-transform:uppercase;text-align:center}
.err{color:var(--bad);font-weight:700;font-size:.9rem}

footer.std{margin-top:28px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem;display:flex;flex-wrap:wrap;gap:6px 18px}
footer.std code{font-family:var(--mono);font-size:.78rem}
@media (max-width:560px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.stage{height:58vh}.userchip .who{display:none}.crumbs .sep,.crumbs .unitlink{display:none}}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* review */
.review-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px;align-items:start}
@media (max-width:920px){.review-grid{grid-template-columns:1fr}}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.card{perspective:800px;height:130px;border:0;background:none;padding:0;cursor:pointer}
.card .in{position:relative;width:100%;height:100%;transition:transform .45s;transform-style:preserve-3d}
.card.flip .in{transform:rotateY(180deg)}
.card .f,.card .b{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:12px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;padding:10px;text-align:center}
.card .f{background:var(--surface);font-family:var(--display);font-weight:600;font-size:1.1rem}
.card .b{background:var(--surface-2);transform:rotateY(180deg);font-size:.84rem;line-height:1.35}
.quiz .opts{display:grid;gap:8px}
.quiz .opt{text-align:left;border:1px solid var(--line);background:var(--surface-2);border-radius:10px;padding:10px 12px;cursor:pointer}
.quiz .opt.right{border-color:var(--good);box-shadow:inset 0 0 0 2px var(--good)}
.quiz .opt.wrong{border-color:var(--bad);box-shadow:inset 0 0 0 2px var(--bad)}
.progress{height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.progress div{height:100%;background:var(--forest);transition:width .3s}
.qnum{font-family:var(--mono);font-size:.78rem;color:var(--muted)}

/* moon inset */
.inset{position:absolute;right:10px;bottom:10px;width:min(34%,220px);aspect-ratio:1;border-radius:12px;overflow:hidden;border:2px solid var(--line);background:#02040a;z-index:2}
.inset canvas{width:100%!important;height:100%!important;display:block}
.inset-title{position:absolute;left:0;right:0;top:0;padding:4px 8px;font-size:.72rem;font-weight:700;color:#e8ecf5;background:rgb(0 0 0 / .45);z-index:1}

/* shadow log */
.log-grid{display:grid;grid-template-columns:minmax(0,400px) minmax(0,1fr);gap:16px;align-items:start}
@media (max-width:920px){.log-grid{grid-template-columns:1fr}}
.fld{display:grid;gap:4px;font-weight:700;font-size:.9rem;min-width:0}
.fld input,.fld textarea{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--surface-2);font-weight:400;min-width:0;width:100%}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.compass{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;max-width:240px}
.compass button{border:1px solid var(--line);background:var(--surface-2);border-radius:8px;padding:7px 0;font-weight:700;cursor:pointer;font-family:var(--mono)}
.compass button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.compass .c{visibility:hidden}

.hintline{margin:-6px 0 0;font-size:.82rem;color:var(--muted)}

/* class shadow record */
.viz{margin-top:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:grid;gap:12px}
.viz-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:10px}
.viz-stats{display:flex;gap:16px;font-size:.92rem;color:var(--muted)}
.viz-stats strong{color:var(--ink);font-family:var(--display);font-size:1.3rem}
.viz-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:760px){.viz-grid{grid-template-columns:1fr}}
.viz-card{background:var(--surface-2);border-radius:12px;padding:12px;display:grid;gap:6px;min-width:0}
.viz-card.wide{grid-column:1/-1}
.viz-card h3{font-family:var(--body);font-size:1rem;font-weight:700;margin:0}
.viz-legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.82rem;color:var(--muted)}
.viz-note{margin:0;font-size:.82rem;color:var(--muted)}