/* Lab Graph Maker.
   Layout: Roji brand header, the student's labels and data table on the left, the graph on a sheet
   of graph paper with its checklist on the right (stacked on phones). The graph and the printed
   page are always dark ink on white paper, in both themes. */
:root{
  --navy:#1D5B8D; --sky:#0B7CC9; --green:#3CC47C; --green-ink:#1E8A52;
  --bg:#EEF5FB; --surface:#FFFFFF; --ink:#16324A; --muted:#557089; --line:#CFE0EE; --field:#F7FBFE; --tint:#E3EFF9;
  --on-navy:#FFFFFF; --warn-bg:#FFF1CC; --warn-ink:#7A5400; --ok-bg:#DDF5E8; --ok-ink:#15693F;
  --miss:#E2573B; --miss-bg:#FFE7E0; --miss-ink:#8F2A12;
  --card:#1D5B8D; --card-ink:#FFFFFF; --card-soft:#CFE3F3; --card-line:rgba(255,255,255,.22);
  --paper:#FFFFFF; --paper-edge:#C3D8EA;
  --title-fill:#0B7CC9; --title-stroke:#12344F;
  --shadow:0 1px 0 #d7e6f2, 0 10px 30px -18px rgba(29,91,141,.45);
  --f-display:"Luckiest Guy","Arial Rounded MT Bold","Trebuchet MS",sans-serif;
  --f-body:"Nunito",system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0E1B27; --surface:#15283A; --ink:#E6F0F8; --muted:#9BB3C8; --line:#27425A; --field:#10202F; --tint:#1B3247;
  --navy:#5CADE2; --sky:#5CADE2; --green-ink:#5FD897; --on-navy:#06121C;
  --warn-bg:#3B3013; --warn-ink:#F4CF6E; --ok-bg:#153B2A; --ok-ink:#7FE3AE;
  --miss:#FF8A70; --miss-bg:#43201A; --miss-ink:#FFC2B3;
  --card:#1A3A57; --card-ink:#E6F0F8; --card-soft:#A9C4DA; --card-line:rgba(255,255,255,.16);
  --paper:#FFFFFF; --paper-edge:#27425A;
  --title-fill:#5CADE2; --title-stroke:#06121C; --shadow:0 12px 30px -20px rgba(0,0,0,.8); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0E1B27; --surface:#15283A; --ink:#E6F0F8; --muted:#9BB3C8; --line:#27425A; --field:#10202F; --tint:#1B3247;
  --navy:#5CADE2; --sky:#5CADE2; --green-ink:#5FD897; --on-navy:#06121C;
  --warn-bg:#3B3013; --warn-ink:#F4CF6E; --ok-bg:#153B2A; --ok-ink:#7FE3AE;
  --miss:#FF8A70; --miss-bg:#43201A; --miss-ink:#FFC2B3;
  --card:#1A3A57; --card-ink:#E6F0F8; --card-soft:#A9C4DA; --card-line:rgba(255,255,255,.16);
  --paper:#FFFFFF; --paper-edge:#27425A;
  --title-fill:#5CADE2; --title-stroke:#06121C; --shadow:0 12px 30px -20px rgba(0,0,0,.8); color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%}
.wrap{max-width:1180px;margin:0 auto;padding-inline:clamp(16px,3vw,32px);padding-block:12px 40px}
button,input,select,textarea{font-family:inherit}
:focus-visible{outline:3px solid var(--green);outline-offset:2px}
p{margin:0}

/* ---------- brand header (same on every Roji tool) ---------- */
.brandbar{display:flex;justify-content:space-between;align-items:center;gap:12px;font-weight:800;color:var(--navy);font-size:.9rem}
.brandbar a{color:inherit;text-decoration:none}
.brandbar .kit{letter-spacing:.08em;text-transform:uppercase;font-size:.72rem;color:var(--muted)}
.hero{display:flex;align-items:center;margin-block:4px 10px}
.hero-text{flex:1;min-width:0;padding-bottom:clamp(8px,2vw,20px)}
.eyebrow{font-weight:800;color:var(--green-ink);letter-spacing:.08em;text-transform:uppercase;font-size:.78rem}
h1{font-family:var(--f-display);font-weight:400;font-size:clamp(2.1rem,6vw,3.8rem);line-height:.95;margin:4px 0 10px;
  color:var(--title-fill);-webkit-text-stroke:2px var(--title-stroke);paint-order:stroke fill;letter-spacing:.01em;text-wrap:balance;text-shadow:0 3px 0 var(--title-stroke)}
h1 .grades{display:inline-block;font-size:.42em;letter-spacing:.03em;-webkit-text-stroke:0;text-shadow:none;color:var(--navy);vertical-align:.35em;white-space:nowrap}
.tagline{color:var(--muted);font-weight:700;max-width:58ch}
.roji{flex:0 0 auto;width:clamp(110px,20vw,200px);display:block}
.roji img{width:100%;height:auto;display:block;filter:drop-shadow(0 8px 12px rgba(18,52,79,.18))}

.example{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;justify-content:space-between;background:var(--warn-bg);color:var(--warn-ink);
  border-radius:14px;padding:10px 14px;font-weight:700;margin-bottom:16px}
.example .btn.ghost{color:var(--warn-ink);border-color:currentColor}

/* ---------- layout ---------- */
.app{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:20px;align-items:start}
@media (max-width:900px){.app{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--surface);border-radius:18px;box-shadow:var(--shadow);padding:6px 20px 20px;min-width:0}
.grp{padding-top:14px;display:grid;gap:10px}
.grp h2,.tools h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--green-ink);margin:0;font-weight:800}
.hint{font-weight:600;font-size:.85rem;color:var(--muted)}
.hint:empty{display:none}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{font-size:.9rem;font-weight:800;border:2px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:8px 13px;min-height:44px;min-width:44px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--navy);color:var(--on-navy);border-color:var(--navy)}
.btn{display:inline-flex;align-items:center;justify-content:center;font-size:.95rem;font-weight:800;border:2px solid var(--navy);background:var(--navy);color:var(--on-navy);
  border-radius:12px;padding:9px 16px;min-height:44px;cursor:pointer;text-decoration:none}
.btn.ghost{background:transparent;color:var(--navy)}
.btn.small{font-size:.88rem;padding:6px 12px}
.btn.go{background:var(--green);border-color:var(--green);color:#06301B;font-size:1.05rem;padding-inline:22px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.actions{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- labels ---------- */
.field{display:grid;gap:4px;min-width:0}
.field>span{font-size:.82rem;font-weight:800;color:var(--muted)}
.field input,.data input{font-size:1.02rem;font-weight:700;color:var(--ink);background:var(--field);border:2px solid var(--line);border-radius:10px;padding:8px 12px;width:100%;min-width:0;min-height:44px}
.field input:focus,.data input:focus{border-color:var(--sky);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--sky) 25%,transparent)}
.field input::placeholder,.data input::placeholder{color:var(--muted);opacity:.65;font-weight:600}
.pair{display:grid;grid-template-columns:minmax(0,1fr) minmax(72px,104px);gap:10px}

/* ---------- the data table, like a lab notebook ---------- */
.trialrow{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px}
.tablebox{min-width:0}
.data{width:100%;border-collapse:separate;border-spacing:0 6px;table-layout:fixed}
.data th{font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);text-align:left;padding:0 4px 2px;vertical-align:bottom;overflow-wrap:anywhere}
.data th small{display:block;font-size:.82rem;letter-spacing:0;text-transform:none;color:var(--ink);font-weight:800}
.data th.n,.data td.n{width:26px;text-align:center}
.data th.rmc,.data td.rmc{width:38px}
.data td{padding:0 3px;vertical-align:middle}
.data td.n{font-family:var(--f-display);color:var(--muted);font-size:1rem;font-variant-numeric:tabular-nums;padding:0}
.data td.avg{font-weight:800;font-variant-numeric:tabular-nums;color:var(--navy);font-size:.95rem;padding-left:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.data th.avgc{width:64px}
.data input{padding-inline:9px;font-variant-numeric:tabular-nums}
.data input.bad{border-color:var(--miss);background:var(--miss-bg);color:var(--miss-ink)}
.rm{width:36px;height:44px;border:0;background:transparent;color:var(--muted);border-radius:10px;font-size:1.3rem;font-weight:800;cursor:pointer;padding:0}
.rm:hover{background:var(--tint)}
@media (max-width:520px){.panel{padding-inline:14px}.data input{padding-inline:6px;font-size:.95rem}.data th.avgc{width:50px}.data td.avg{padding-left:4px;font-size:.85rem}}

.opts{display:grid;gap:2px}
.opt{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:700;cursor:pointer}
.opt input{width:22px;height:22px;accent-color:var(--navy);flex:none}

/* ---------- the graph, on its own sheet of paper ---------- */
.side{min-width:0;display:grid;gap:14px}
.paper{margin:0;background:var(--paper);border:2px solid var(--paper-edge);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;line-height:0}
.paper canvas{display:block;width:100%;height:auto}

/* ---------- checklist ---------- */
.verdict{background:var(--card);color:var(--card-ink);border-radius:18px;padding:16px 20px;display:grid;gap:8px;box-shadow:var(--shadow)}
.vhead{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--card-soft)}
.verdict .big{font-family:var(--f-display);font-size:clamp(1.5rem,4.5vw,2rem);line-height:1;padding-top:.12em;text-wrap:balance}
.checks{list-style:none;margin:4px 0 0;padding:0;display:grid}
.checks li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;align-items:start;padding:8px 0;border-top:1px solid var(--card-line);font-weight:700;font-size:.95rem;line-height:1.35}
.mark{width:26px;height:26px;border-radius:50%;border:2px solid var(--card-ink);display:grid;place-items:center;font-size:.85rem;font-weight:800;line-height:1;flex:none}
li[data-state="ok"] .mark{background:var(--green);border-color:var(--green);color:#06301B}
li[data-state="ok"] .say{color:var(--card-soft)}
li[data-state="tip"] .mark{background:var(--warn-bg);border-color:var(--warn-bg);color:var(--warn-ink)}
li[data-state="todo"] .mark{background:transparent}
.checks label{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;align-items:start;cursor:pointer;grid-column:1/-1;min-height:28px}
.checks input[type=checkbox]{width:26px;height:26px;margin:0;accent-color:var(--green)}

.tools{display:grid;gap:10px}
.toast:empty{display:none}
.toast{background:var(--ok-bg);color:var(--ok-ink);border-radius:10px;padding:8px 12px;font-weight:700;font-size:.9rem}
.copybox{min-height:70px;font-size:.8rem;font-weight:600;word-break:break-all;color:var(--ink);background:var(--field);border:2px solid var(--line);border-radius:10px;padding:9px 10px;width:100%}
.how{background:var(--surface);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow)}
.how summary{cursor:pointer;font-weight:800;color:var(--navy);min-height:28px}
.how p{margin-top:8px;max-width:65ch}
.how ul{margin:8px 0 0;padding-left:1.2em;display:grid;gap:4px}

footer.site{margin-top:28px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.85rem;font-weight:700}
footer.site a{color:var(--navy)}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* ---------- printed page (US Letter). Fixed paper colors: this is what prints. ---------- */
.sheet{display:none}
@page{size:letter;margin:.5in}
@media print{
  html{padding:0}
  body{background:#fff;color:#16324A}
  .wrap{display:none!important}
  .sheet{display:block;font-family:var(--f-body);color:#16324A;font-size:10.5pt;line-height:1.35}
  .sh-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;border-bottom:2px solid #1D5B8D;padding-bottom:6px}
  .sh-eyebrow{font-size:8.5pt;text-transform:uppercase;letter-spacing:.09em;font-weight:800;color:#4F6A82}
  .sh-title{font-family:var(--f-display);font-weight:400;font-size:20pt;line-height:1;color:#1D5B8D;margin:2px 0 0}
  .sh-name{font-weight:700;white-space:nowrap;font-size:10pt}
  .sh-name i{display:inline-block;width:1.9in;border-bottom:1.5px solid #16324A}
  .sh-graph{display:block;width:6.4in;max-width:100%;height:auto;margin:10px auto 6px;border:1px solid #C5D6E5}
  .sh-cols{display:flex;gap:.35in;align-items:flex-start;margin-top:6px}
  .sh-cols>div{flex:1;min-width:0}
  .sh-h{font-size:8.5pt;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:#4F6A82;margin:0 0 4px}
  .sh-table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
  .sh-table th{font-size:8pt;text-align:left;color:#4F6A82;padding:3px 5px;border-bottom:1.5px solid #C5D6E5;font-weight:800}
  .sh-table td{padding:3px 5px;border-bottom:1px solid #C5D6E5;font-weight:700}
  .sh-table tr{break-inside:avoid}
  .sh-list{list-style:none;margin:0;padding:0}
  .sh-list li{display:flex;gap:7px;align-items:flex-start;padding:3px 0;font-weight:600;font-size:9.5pt;break-inside:avoid}
  .sh-box{flex:none;width:11pt;height:11pt;border:1.5px solid #16324A;border-radius:2px;font-size:9pt;line-height:9pt;text-align:center;font-weight:800;margin-top:1pt}
  .sh-after{margin-top:8px!important}
  .sh-foot{margin-top:12px;display:flex;align-items:center;gap:8px;font-weight:800;color:#1D5B8D;font-size:9pt;border-top:1px solid #C5D6E5;padding-top:6px}
  .sh-foot img{width:22pt;height:22pt;border-radius:50%}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}