/* Allentronics palette, light: the logo's orange and charcoal on a warm cream
   ground. Orange text uses a deeper shade so it stays readable on white. AI is
   blue so the brand orange is never read as "this was a bot". */
:root {
  --bg: #faf5ee;
  --panel: #ffffff;
  --panel-2: #f6eee3;
  --line: #e7dacb;
  --text: #2a2119;
  --muted: #76685a;
  --accent: #ee8a2a;      /* fills: buttons, bubbles, highlights */
  --accent-ink: #b45f0e;  /* orange text on light backgrounds */
  --accent-2: #b45f0e;
  --on-accent: #1f1306;
  --human: #0f8a5f;
  --human-bg: #e8f6ef;
  --human-line: #a9dcc5;
  --ai: #3b5bdb;
  --ai-bg: #edf1ff;
  --ai-line: #bcc8f4;
  --warn: #a35c00;
  --warn-bg: #fff4e3;
  --warn-line: #f0c78f;
  --danger: #c0392b;
  --danger-bg: #fdeeec;
  --danger-line: #f0b6ae;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: radial-gradient(1200px 600px at 50% -10%, #fde9d2 0%, var(--bg) 60%) fixed, var(--bg);
  color: var(--text);
  font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0 0 .4em; line-height: 1.2; font-weight: 650; }
h1 { font-size: 1.7rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.02rem; }
p { margin: 0 0 1em; }
a { color: var(--accent-ink); }
code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; font-size: .9em; }

.muted { color: var(--muted); } .small { font-size: .85rem; } .tiny { font-size: .76rem; }
.center { text-align: center; } .hidden { display: none !important; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 24px 20px 40px; }
.narrow { max-width: 520px; margin: 0 auto; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 1px 2px rgba(42,33,25,.04), 0 6px 20px rgba(42,33,25,.05); }
.card + .card { margin-top: 16px; }
.stack > * + * { margin-top: 14px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > * { flex: 1 1 160px; }
.row > .shrink { flex: 0 0 auto; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 760px) { .grid2, .grid3 { grid-template-columns: 1fr; } }

button, .btn {
  font: inherit; font-weight: 600; color: var(--on-accent); background: var(--accent);
  border: 1px solid transparent; border-radius: 10px; padding: 10px 17px; cursor: pointer;
  text-decoration: none; display: inline-block; transition: filter .15s, opacity .15s;
}
button:hover:not(:disabled), .btn:hover { filter: brightness(1.1); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.ghost, .btn.ghost { background: transparent; border-color: var(--line); color: var(--text); }
button.danger { background: transparent; border-color: var(--danger-line); color: var(--danger); }
button.big, .btn.big { font-size: 1.12rem; padding: 15px 30px; border-radius: 12px; }
button.small, .btn.small { font-size: .82rem; padding: 6px 11px; border-radius: 8px; }

input, select, textarea {
  font: inherit; color: var(--text); background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input[type="range"], input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); }
input[type="radio"] { width: 16px; height: 16px; padding: 0; }
input[type="checkbox"] { width: 17px; height: 17px; padding: 0; }
label { display: block; font-size: .82rem; color: var(--muted); margin-bottom: 6px; }
.field { margin-bottom: 14px; }
.error { color: var(--danger); font-size: .9rem; min-height: 1.2em; margin-top: 8px; }
.ok { color: var(--human); }
.warnbox {
  border: 1px solid var(--warn-line); background: var(--warn-bg); color: var(--warn);
  border-radius: 10px; padding: 12px 14px; font-size: .9rem;
}
.pill {
  display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted);
}
.pill.human { color: var(--human); border-color: var(--human-line); background: var(--human-bg); }
.pill.ai { color: var(--ai); border-color: var(--ai-line); background: var(--ai-bg); }
.pill.warn { color: var(--warn); border-color: var(--warn-line); background: var(--warn-bg); }
.pill.on { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }

/* ------------------------------------------------------------ console shell */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand h1 { margin: 0; }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav button { background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; font-size: .86rem; }
.nav button.on { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.nav .num { display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: rgba(42,33,25,.1); font-size: .7rem; margin-right: 6px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 10px 0 4px; }
.step { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.step .n { color: var(--accent-ink); font-weight: 700; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; }
.step.done { border-color: var(--human-line); }
.step.done .n::after { content: " ✓"; color: var(--human); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr 1fr; } }

.list-item { display: flex; gap: 14px; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.list-item:last-child { border-bottom: 0; }
.list-item .title { font-weight: 650; }

.drop {
  border: 1.5px dashed var(--line); border-radius: 12px; padding: 16px; text-align: center; background: var(--panel-2);
  cursor: pointer; transition: border-color .15s;
}
.drop:hover, .drop.drag { border-color: var(--accent); }
.drop.filled { border-style: solid; border-color: var(--human-line); background: var(--human-bg); }
.drop .file { font-weight: 650; }

.persona-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.persona { display: grid; grid-template-columns: 20px 1fr; gap: 8px; align-items: start; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); cursor: pointer; }
.persona .name { font-weight: 650; font-size: .92rem; }
.persona.off { opacity: .45; }

.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------------------------------------- live view */
.bigclock { font-size: clamp(3.5rem, 12vw, 7rem); font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: .02em; line-height: 1; }
.bigclock.warn { color: var(--warn); } .bigclock.critical { color: var(--danger); }
.bignum { font-size: 3rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat-row { display: flex; gap: 12px; flex-wrap: wrap; }
.stat { flex: 1 1 130px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.stat .n { font-size: 1.8rem; font-weight: 750; font-variant-numeric: tabular-nums; }
.stat .k { font-size: .74rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
.chip { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px; text-align: center; font-weight: 650; font-size: .9rem; position: relative; }
.chip .sub { font-size: .72rem; color: var(--muted); font-weight: 500; }
.chip.off { opacity: .4; }
.chip.right { border-color: var(--human-line); background: var(--human-bg); }
.chip.wrong { border-color: var(--danger-line); background: var(--danger-bg); }
.roundtrack { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.roundtrack div { border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; font-size: .8rem; color: var(--muted); }
.roundtrack .now { border-color: var(--accent); color: var(--text); }
.roundtrack .done { border-color: var(--human-line); }
.pairs { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.pair { border: 1px solid var(--line); border-radius: 12px; padding: 12px; background: var(--panel-2); font-size: .9rem; animation: pop .3s ease-out both; }
.pair.ai { border-color: var(--ai-line); background: linear-gradient(180deg, var(--ai-bg), var(--panel) 70%); }
.pair.human { border-color: var(--human-line); background: linear-gradient(180deg, var(--human-bg), var(--panel) 70%); }
.findings li { margin-bottom: 6px; }
@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ------------------------------------------------------------- student chat */
.chat-shell { max-width: 720px; margin: 0 auto; height: 100dvh; display: flex; flex-direction: column; padding: 12px 16px 14px; }
.chat-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 4px 12px; border-bottom: 1px solid var(--line); }
.log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding: 16px 2px; }
.bubble { max-width: 78%; padding: 9px 14px; border-radius: 16px; overflow-wrap: anywhere; animation: pop .16s ease-out; }
.bubble.them { align-self: flex-start; background: var(--panel-2); border-bottom-left-radius: 5px; }
.bubble.mine { align-self: flex-end; background: var(--accent); color: var(--on-accent); border-bottom-right-radius: 5px; }
.typing { align-self: flex-start; display: flex; gap: 4px; padding: 12px 15px; background: var(--panel-2); border-radius: 16px; }
.typing span { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); animation: blink 1.3s infinite; }
.typing span:nth-child(2) { animation-delay: .18s; } .typing span:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 60%, 100% { opacity: .25; } 30% { opacity: 1; } }
.composer { display: flex; gap: 10px; padding-top: 12px; border-top: 1px solid var(--line); }
.composer input { flex: 1; }
.notice { border-left: 3px solid var(--accent-2); background: var(--panel-2); border-radius: 10px; padding: 14px 16px; font-size: .92rem; color: var(--muted); }
.notice strong { color: var(--text); }

/* ------------------------------------------------------------------- modal */
.modal { position: fixed; inset: 0; background: rgba(42, 33, 25, .45); display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50; }
.modal-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; max-width: 480px; width: 100%; box-shadow: 0 20px 60px rgba(42,33,25,.25); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ------------------------------------------------------------------ credit */
.credit { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 18px 16px 22px; color: var(--muted); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; }
.credit a { color: inherit; text-decoration: none; display: inline-flex; align-items: center; gap: 10px; }
.credit span { opacity: .75; }
.credit img { height: 24px; width: auto; display: block; }

/* ------------------------------------------------------------ about / guide */
.about { max-width: 920px; margin: 48px auto 0; }
.about-title { text-align: center; text-transform: uppercase; letter-spacing: .12em; font-size: .9rem; color: var(--accent-ink); margin-bottom: 16px; }
.readme { padding: clamp(18px, 4vw, 40px); line-height: 1.65; }
.readme h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 18px 0 8px; }
.readme h2 { font-size: 1.45rem; margin: 40px 0 12px; padding-bottom: 8px; border-bottom: 2px solid var(--warn-line); }
.readme h3 { font-size: 1.12rem; margin: 28px 0 10px; color: var(--accent-ink); }
.readme img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--line); }
.readme p[align="center"] { text-align: center; }
.readme hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.readme ul, .readme ol { padding-left: 1.4em; } .readme li { margin-bottom: 6px; }
.readme blockquote { margin: 16px 0; padding: 12px 16px; border-left: 3px solid var(--accent); background: var(--panel-2); border-radius: 8px; color: var(--muted); }
.readme blockquote p { margin: 0; }
.readme pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px; overflow-x: auto; }
.readme pre code { background: none; padding: 0; }
.readme table { margin: 14px 0; display: block; overflow-x: auto; }
.readme td { vertical-align: top; }
.readme table td img { margin-bottom: 6px; }