/*
 * Session 9 wears Session 8's clothes: dark, orange, Inter and Plex Mono.
 *
 * The board is sized in proportion to its own width (1em = 1.15% of it), so
 * the copy inside the admin page and the smart board show exactly the same
 * layout, only at different sizes.
 */

:root {
  --ink: #08080a;
  --ink-2: #0f0f13;
  --ink-3: #16161c;
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.16);
  --paper: #f4f3f1;
  --muted: rgba(244, 243, 241, 0.62);
  --faint: rgba(244, 243, 241, 0.38);
  --amber: #ff7a29;
  --amber-soft: rgba(255, 122, 41, 0.14);
  --blue: #7aa2ff;
  --blue-soft: rgba(122, 162, 255, 0.12);
  --green: #5fd39b;
  --green-soft: rgba(95, 211, 155, 0.13);
  --red: #ff6b6b;
  --red-soft: rgba(255, 107, 107, 0.13);
  --r: 16px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --sans: "Inter", -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
:root { color-scheme: dark; scrollbar-color: rgba(255,255,255,0.22) transparent; }
html, body { margin: 0; background: var(--ink); color: var(--paper); font-family: var(--sans); font-size: 16px; -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; overflow-x: hidden; }
[hidden] { display: none !important; }

/* the room behind everything, as in Session 8 */
.glow {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(60vw 60vw at 12% -10%, rgba(255, 122, 41, 0.16), transparent 60%),
    radial-gradient(50vw 50vw at 100% 110%, rgba(122, 162, 255, 0.12), transparent 60%);
}
header, main, nav, section.admin { position: relative; z-index: 2; }

h1, h2, h3 { margin: 0; font-weight: 560; letter-spacing: -0.025em; line-height: 1.1; }
h1 { font-size: 3.4em; }
h2 { font-size: 2em; }
h3 { font-size: 1.3em; }
p { margin: 0; line-height: 1.5; }
.kicker { font-family: var(--mono); font-size: 0.75em; letter-spacing: 0.16em; text-transform: uppercase; color: var(--amber); }
.lead { font-size: 1.2em; line-height: 1.45; color: var(--muted); }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: 0.85em; }

/* layout */
.wrap { padding: 1.4em; max-width: 1400px; margin: 0 auto; }
.stack { display: grid; gap: 1em; align-content: start; }
.stack > * { min-width: 0; }
.row { display: flex; gap: 0.6em; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 1em; flex-wrap: wrap; }
.cols { display: grid; gap: 1.2em; grid-template-columns: 1fr; align-items: start; }
.cols > * { min-width: 0; }
@media (min-width: 1000px) {
  .cols { grid-template-columns: 1fr 1fr; }
  .cols.wide-left { grid-template-columns: 1.6fr 1fr; }
  .cols.narrow-left { grid-template-columns: 0.85fr 1.15fr; }
}

/* the top strip */
.top {
  display: flex; align-items: center; gap: 1em; padding: 0.8em 1.4em;
  border-bottom: 1px solid var(--line); backdrop-filter: blur(8px);
}
.top .grow { flex: 1; }
.top .kicker { white-space: nowrap; }
.dot { width: 0.55em; height: 0.55em; border-radius: 50%; background: var(--faint); display: inline-block; }
.dot.on { background: var(--green); }
.dot.off { background: var(--red); }
.pill { display: inline-flex; align-items: center; gap: 0.5em; font-family: var(--mono); font-size: 0.75em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* cards */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.02));
  border: 1px solid var(--line); border-radius: var(--r); padding: 1.2em; display: grid; gap: 0.9em; min-width: 0;
}
.card.warm { border-color: rgba(255,122,41,0.45); background: linear-gradient(180deg, var(--amber-soft), rgba(255,255,255,0.02)); }
.card.cool { border-color: rgba(122,162,255,0.35); background: linear-gradient(180deg, var(--blue-soft), rgba(255,255,255,0.02)); }
.in { animation: rise 0.5s var(--ease) both; }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* buttons */
.btn {
  font: inherit; font-size: 0.95em; font-weight: 500; line-height: 1.2;
  padding: 0.7em 1.1em; border-radius: 12px;
  border: 1px solid var(--line-2); background: rgba(255,255,255,0.05); color: var(--paper);
  cursor: pointer; transition: background 0.2s var(--ease), transform 0.15s var(--ease);
  text-decoration: none; display: inline-flex; align-items: center; gap: 0.5em;
}
.btn:hover:not(:disabled) { background: rgba(255,255,255,0.1); }
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn.go { background: var(--amber); border-color: var(--amber); color: #fff; font-weight: 600; }
.btn.go:hover:not(:disabled) { background: #ff8d47; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 0.45em 0.8em; font-size: 0.85em; border-radius: 9px; }
.btn.lg { padding: 0.9em 1.5em; font-size: 1.05em; }
.btn.danger { color: var(--red); border-color: rgba(255,107,107,0.5); background: transparent; }

/* a choice: columns, Yes/No, decisions, reasons */
.pick {
  font: inherit; font-size: 0.92em; line-height: 1.2; cursor: pointer;
  padding: 0.55em 0.95em; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(255,255,255,0.03); color: var(--paper);
  transition: all 0.2s var(--ease);
}
.pick:hover:not(:disabled) { border-color: var(--amber); }
.pick.on { background: var(--amber); border-color: var(--amber); color: #fff; font-weight: 600; }
.pick:disabled { cursor: default; }
.picks { display: flex; gap: 0.45em; flex-wrap: wrap; }

input, textarea {
  font: inherit; color: var(--paper); width: 100%;
  background: rgba(255,255,255,0.04); border: 1px solid var(--line-2);
  border-radius: 14px; padding: 0.9em 1em; outline: none;
}
input:focus, textarea:focus { border-color: var(--amber); background: rgba(255,255,255,0.07); }
textarea { min-height: 34vh; line-height: 1.5; resize: vertical; }
::placeholder { color: var(--faint); }
button:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* the data: one table that scrolls, header fixed */
.scroll { overflow: auto; border: 1px solid var(--line); border-radius: var(--r); background: rgba(0,0,0,0.25); }
.table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 0.82em; }
.table th, .table td { text-align: left; padding: 0.5em 0.8em; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table th { color: var(--amber); font-weight: 500; position: sticky; top: 0; background: var(--ink-2); z-index: 1; }
.table td.yes { color: var(--red); font-weight: 600; }
.table tr:hover td { background: rgba(255,255,255,0.03); }
/* what each column means: folded until opened */
details.legend { padding: 0.9em 1.2em; }
details.legend summary { cursor: pointer; list-style: none; display: flex; align-items: center; gap: 0.6em; }
details.legend summary::-webkit-details-marker { display: none; }
details.legend summary::before { content: "▸"; color: var(--amber); transition: transform 0.2s var(--ease); display: inline-block; }
details.legend[open] summary::before { transform: rotate(90deg); }
.legend-list { display: grid; gap: 0.6em 2em; grid-template-columns: 1fr; margin-top: 0.9em; }
@media (min-width: 900px) { .legend-list { grid-template-columns: 1fr 1fr; } }
body.board .legend-list { grid-template-columns: 1fr 1fr 1fr; }
.legend-list div { display: grid; gap: 0.1em; }
.legend-list b { font-weight: 600; color: var(--amber); }
.legend-list span { color: var(--muted); font-size: 0.9em; }

/* day one? */
.dayone { display: grid; gap: 0.5em; }
.dq {
  display: grid; grid-template-columns: 1fr auto; gap: 0.8em; align-items: center;
  padding: 0.65em 0.9em; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,0.02);
}
.dq .name b { font-weight: 600; }
.dq .name span { display: block; color: var(--muted); font-size: 0.85em; }
.dq.right { border-color: rgba(95,211,155,0.55); background: var(--green-soft); }
.dq.wrong { border-color: rgba(255,107,107,0.55); background: var(--red-soft); }
.dq .verdict { grid-column: 1 / -1; font-size: 0.88em; font-weight: 600; }
.dq.right .verdict { color: var(--green); }
.dq.wrong .verdict { color: var(--red); }

/* find patterns */
.finder { display: grid; gap: 0.9em; }
.frows { display: grid; gap: 0.45em; }
.frow { display: grid; grid-template-columns: minmax(9em, 15em) 1fr minmax(9em, auto) auto; gap: 0.8em; align-items: center; padding: 0.35em 0.5em; border-radius: 10px; border: 1px solid transparent; }
.frow.hl { border-color: rgba(255,122,41,0.6); background: var(--amber-soft); }
.frow .v { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.frow .col-name { color: var(--muted); font-weight: 400; }
.frow.chosen { border-color: rgba(255,122,41,0.6); background: var(--amber-soft); }
.frow .num { font-family: var(--mono); font-size: 0.85em; color: var(--muted); white-space: nowrap; }
.frow .num b { color: var(--paper); font-size: 1.15em; }
.track { height: 0.8em; background: rgba(255,255,255,0.07); border-radius: 999px; overflow: hidden; }
.track i { display: block; height: 100%; background: var(--amber); border-radius: 999px; transition: width 0.45s var(--ease); }
.frow.sub { padding-left: 2em; }
.frow.sub .v { font-weight: 400; color: var(--muted); }
.frow.sub .track i { background: var(--blue); }
.group { display: grid; gap: 0.2em; padding: 0.4em 0; border-bottom: 1px solid var(--line); }
.sign-btn { font-size: 0.8em; padding: 0.35em 0.7em; }
.sign-btn.on { background: var(--amber); border-color: var(--amber); color: #fff; }
@media (max-width: 640px) {
  .frow { grid-template-columns: 1fr auto; }
  .frow .track { grid-column: 1 / -1; order: 3; }
  .frow.sub { padding-left: 0.8em; }
}

/* a theory */
.says { font-size: 1.35em; line-height: 1.35; }
.who { font-family: var(--mono); font-size: 0.78em; letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue); }
.feedback { border-radius: 12px; padding: 0.8em 1em; line-height: 1.5; }
.feedback.right { background: var(--green-soft); border: 1px solid rgba(95,211,155,0.5); }
.feedback.wrong { background: var(--red-soft); border: 1px solid rgba(255,107,107,0.5); }
.feedback.right b.tag { color: var(--green); }
.feedback.wrong b.tag { color: var(--red); }
.feedback.plain { background: var(--blue-soft); border: 1px solid rgba(122,162,255,0.35); }
.feedback { display: grid; gap: 0.5em; }

/* hints for the teacher only: the right choice outlined green, the wrong red */
.pick.hint-right { box-shadow: 0 0 0 3px var(--green); }
.pick.hint-wrong { box-shadow: 0 0 0 2px rgba(255,107,107,0.75); }

/* chosen warning signs */
.sign-line { display: flex; gap: 0.8em; align-items: center; flex-wrap: wrap; padding: 0.6em 0.8em; border-radius: 12px; border: 1px solid rgba(255,122,41,0.5); background: rgba(255,122,41,0.08); }
.sign-no { font-family: var(--mono); font-size: 0.75em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); }
.sign-text { flex: 1; font-weight: 600; }

/* how the class voted on a theory */
.votes { display: grid; gap: 0.7em; }
.vote { border: 1px solid var(--line); border-radius: 12px; padding: 0.7em 0.9em; display: grid; gap: 0.4em; background: rgba(255,255,255,0.02); }
.vote.right { border-color: rgba(95,211,155,0.6); background: var(--green-soft); }
.vote-head { display: flex; justify-content: space-between; gap: 1em; }
.vote-label { font-weight: 600; }
.vote.right .vote-label { color: var(--green); }
.vote-n { font-family: var(--mono); color: var(--muted); white-space: nowrap; }
.vote .track i { background: var(--blue); }
.vote.right .track i { background: var(--green); }
.vote-names { font-size: 0.85em; color: var(--muted); }
.vote-why { font-size: 0.9em; color: var(--muted); }

/* the teacher's side panel on the admin page */
.admin-grid { display: grid; gap: 1em; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 1100px) { .admin-grid { grid-template-columns: minmax(0, 1fr) 360px; } }
.notes { position: sticky; top: 5.2em; display: grid; gap: 0.8em; max-height: calc(100vh - 6em); overflow: auto; }
.notes .card { gap: 0.6em; }
.notes h4 { margin: 0; font-size: 0.95em; }
.notes p { font-size: 0.92em; }
.note-right { color: var(--green); }
.note-wrong { color: var(--red); }
.ended { padding: 0.8em 1em; border-radius: 12px; border: 1px solid rgba(255,107,107,0.5); background: var(--red-soft); }

/* numbers */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(9em, 1fr)); gap: 0.8em; }
.tile { border: 1px solid var(--line); border-radius: 14px; padding: 0.9em 1em; background: rgba(255,255,255,0.03); }
.tile .n { font-size: 2.4em; font-weight: 560; letter-spacing: -0.03em; line-height: 1; }
.tile .l { color: var(--muted); font-size: 0.85em; margin-top: 0.35em; }
.tile.good .n { color: var(--green); }
.tile.bad .n { color: var(--red); }
.big { font-size: 4em; font-weight: 560; letter-spacing: -0.04em; color: var(--amber); line-height: 1; }
.marks { display: grid; gap: 0.4em; }
.mark { display: grid; grid-template-columns: 1fr auto; gap: 1em; padding: 0.6em 0.9em; border-radius: 10px; background: rgba(255,255,255,0.03); border: 1px solid var(--line); }
.mark.full { border-color: rgba(95,211,155,0.45); }
.mark.none { border-color: rgba(255,107,107,0.4); }
.mark b { font-family: var(--mono); }

/* people on the board */
.people { display: grid; gap: 0.8em; grid-template-columns: repeat(auto-fill, minmax(15em, 1fr)); }
.person { border: 1px solid var(--line); border-radius: 14px; padding: 0.9em 1em; display: grid; gap: 0.6em; background: rgba(255,255,255,0.03); }
.person .name { font-weight: 600; font-size: 1.1em; display: flex; gap: 0.5em; align-items: center; }
.ticks { display: flex; gap: 0.35em; flex-wrap: wrap; }
.ticks span { font-family: var(--mono); font-size: 0.72em; letter-spacing: 0.06em; padding: 0.3em 0.6em; border-radius: 999px; border: 1px solid var(--line-2); color: var(--muted); }
.ticks span.done { border-color: rgba(95,211,155,0.6); color: var(--green); }
.names { display: flex; gap: 0.5em; flex-wrap: wrap; }
.name-chip { font-family: var(--mono); font-size: 0.85em; padding: 0.4em 0.9em; border-radius: 999px; border: 1px solid var(--line-2); display: inline-flex; gap: 0.5em; align-items: center; }
.url { font-family: var(--mono); color: var(--amber); font-size: 3.2em; letter-spacing: -0.01em; }

/* results table on the board */
.results { width: 100%; border-collapse: collapse; }
.results th, .results td { text-align: left; padding: 0.6em 0.8em; border-bottom: 1px solid var(--line); vertical-align: top; }
.results th { font-family: var(--mono); font-size: 0.75em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); font-weight: 500; }
.results td.n { font-family: var(--mono); font-size: 1.15em; white-space: nowrap; }
.results td.good { color: var(--green); }
.results td.bad { color: var(--red); }
.results tr.ref td { background: var(--blue-soft); }

/* the four checks */
.checks { display: grid; gap: 1em; grid-template-columns: repeat(2, 1fr); }
.check .num { font-family: var(--mono); color: var(--amber); font-size: 0.85em; }
.check.dim { opacity: 0.28; }
.term { font-family: var(--mono); font-size: 0.85em; color: var(--blue); }
ol.steps { margin: 0; padding-left: 1.3em; display: grid; gap: 0.45em; }
.kinds { display: grid; gap: 0.8em; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 800px) { .checks, .kinds { grid-template-columns: 1fr; } }

/* student wizard */
.stepper { display: flex; gap: 0.4em; flex-wrap: wrap; }
.stepper span { font-family: var(--mono); font-size: 0.72em; letter-spacing: 0.08em; padding: 0.4em 0.8em; border-radius: 999px; border: 1px solid var(--line-2); color: var(--faint); }
.stepper span.on { border-color: var(--amber); color: var(--amber); }
.stepper span.done { color: var(--green); border-color: rgba(95,211,155,0.5); }
.wizard-nav { display: flex; justify-content: space-between; gap: 1em; padding-top: 0.4em; }
.toast { position: fixed; bottom: 1.2em; left: 50%; transform: translateX(-50%); z-index: 50; background: var(--ink-3); border: 1px solid var(--amber); padding: 0.7em 1.1em; border-radius: 12px; }

/* ================= the board ================= */
body.board { font-size: max(12px, 1.15vw); height: 100vh; overflow: hidden; display: flex; flex-direction: column; }
body.board .top { flex: 0 0 auto; }
body.board main { flex: 1; overflow: auto; padding: 1.4em 2.2em 2em; }
body.board .scroll.data { height: 52vh; }
body.board .cols { grid-template-columns: 1fr 1fr; }
body.board .cols.wide-left { grid-template-columns: 1.6fr 1fr; }
body.board .cols.narrow-left { grid-template-columns: 0.85fr 1.15fr; }
body.board .checks, body.board .kinds { grid-template-columns: repeat(2, 1fr); }
body.board .frow { grid-template-columns: 16em 1fr 12em auto; }
body.board.drive button, body.board.drive .pick { cursor: pointer; }
body.board:not(.drive) button { pointer-events: none; }

/* student laptop */
body.student .scroll.data { max-height: 60vh; }

/* ================= the admin page ================= */
body.admin { font-size: 15px; }
.bar-admin {
  position: sticky; top: 0; z-index: 10; display: flex; gap: 0.8em; align-items: center; flex-wrap: wrap;
  padding: 0.7em 1.2em; background: rgba(15,15,19,0.96); border-bottom: 1px solid var(--line-2);
}
.bar-admin .now { font-weight: 600; }
.bar-admin .next-label { color: var(--muted); font-size: 0.85em; }
.bar-admin select { font: inherit; background: var(--ink-2); color: var(--paper); border: 1px solid var(--line-2); border-radius: 10px; padding: 0.5em; }
.preview { position: relative; width: 100%; aspect-ratio: 16 / 9; border: 2px solid var(--amber); border-radius: 12px; overflow: hidden; background: var(--ink); }
.preview iframe { position: absolute; top: 0; left: 0; width: 1600px; height: 900px; border: 0; transform-origin: 0 0; }
.preview-label { font-family: var(--mono); font-size: 0.75em; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: 0.55em 0.7em; border-bottom: 1px solid var(--line); vertical-align: top; }
.admin-table th { font-family: var(--mono); font-size: 0.72em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); font-weight: 500; }
details summary { cursor: pointer; color: var(--blue); }
.pre { white-space: pre-wrap; background: rgba(255,255,255,0.03); border: 1px solid var(--line); padding: 0.8em; border-radius: 10px; }

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

.advice-sign { border-left: 3px solid var(--amber); padding-left: 0.8em; display: grid; gap: 0.2em; }

/* one card per student; opened in a panel; done when closed */
.scards { display: grid; gap: 0.7em; grid-template-columns: repeat(auto-fill, minmax(14em, 1fr)); }
.scard { font: inherit; color: var(--paper); text-align: left; cursor: pointer; display: grid; gap: 0.3em;
  padding: 0.9em 1em; border-radius: 14px; border: 1px solid var(--line-2); background: rgba(255,255,255,0.03); }
.scard:hover { border-color: var(--amber); }
.scard span { color: var(--muted); font-size: 0.85em; }
.scard.done { border-color: rgba(95,211,155,0.6); background: var(--green-soft); }
.scard .tick { color: var(--green); font-weight: 600; }
.modal-back { position: fixed; inset: 0; z-index: 40; background: rgba(4,4,6,0.72); display: grid; place-items: center; padding: 3vh 3vw; }
.modal-card { width: min(60em, 100%); max-height: 90vh; overflow: auto; background: var(--ink-2); }
body.board:not(.drive) .modal-back { pointer-events: none; }