/* ==========================================================================
   Site styling for the hub and the lesson pages.
   Same palette as the Workshop app so the whole thing feels like one place.
   Mobile first: everything is readable on a phone held one-handed, and the
   layout only widens when there is room.
   ========================================================================== */

:root {
  --bg: #15181c;
  --panel: #1e2329;
  --panel-edge: #2b323b;
  --ink: #e8ecef;
  --ink-dim: #8a949e;
  --orange: #ff7a1a;
  --orange-dim: #b35008;
  --green: #45d483;
  --blue: #4db8ff;
  --purple: #c9a0ff;
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --link: #ffa45c;   /* light orange: readable on --bg and --panel, visited or not */
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* Links in running text. Without this the browser's blue (purple once
   visited) lands on the dark background. Nav items, tiles and buttons set
   their own colour further down. */
a { color: var(--link); text-underline-offset: 2px; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

/* ---- header and navigation ---------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--panel-edge);
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

/* The Maker Lab Kids lockup (gear + wordmark image). Its background is
   transparent and the gear outline is dark, so it sits on a white tab. */
.mlk-lockup {
  display: inline-flex;
  background: #fff;
  border-radius: 8px;
  padding: 3px 8px;
  line-height: 0;
}
.mlk-lockup img { height: 34px; width: auto; display: block; }
@media (max-width: 480px) {
  .mlk-lockup img { height: 26px; }
}

.wordmark {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.wordmark small {
  display: block;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  font-size: 10px;
  margin-top: 2px;
  text-transform: none;
}

.site-nav { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-color: var(--panel-edge); }
.site-nav a.active { color: var(--bg); background: var(--orange); }

/* ---- page shell ---------------------------------------------------------- */

.page { max-width: 780px; margin: 0 auto; padding: 20px 16px 60px; }

h1 { font-size: 27px; line-height: 1.25; margin-bottom: 8px; }
h2 { font-size: 15px; letter-spacing: 0.1em; text-transform: uppercase;
     color: var(--orange); margin-bottom: 10px; }

.eyebrow {
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px;
}
.subtitle { color: var(--ink-dim); font-size: 16px; margin-bottom: 20px; }

.card {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}
.card ul, .card ol { margin-left: 20px; }
.card li { margin-bottom: 7px; }
.card li:last-child { margin-bottom: 0; }

.card.goal { border-left: 4px solid var(--green); }
.card.goal p { font-size: 17px; font-weight: 600; }
.card.sense { border-left: 4px solid var(--blue); }
.card.teacher { border-left: 4px solid var(--purple); }
.card.teacher summary {
  cursor: pointer; font-size: 15px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--purple); font-weight: 700;
}
.card.teacher p { margin-top: 10px; }

code {
  font-family: var(--mono); font-size: 0.92em;
  background: #12151a; padding: 2px 6px; border-radius: 5px;
}

pre.program {
  font-family: var(--mono); font-size: 14px; line-height: 1.7;
  background: #12151a; border: 1px solid var(--panel-edge);
  border-radius: 9px; padding: 12px 14px; margin: 12px 0;
  overflow-x: auto; white-space: pre; color: var(--green);
}

.copy-button {
  font: inherit; font-size: 13px; font-weight: 700;
  color: var(--bg); background: var(--orange);
  border: none; border-radius: 9px; padding: 11px 18px; cursor: pointer;
}
.hint { font-size: 13px; color: var(--ink-dim); margin-top: 10px; }

table.watch { width: 100%; border-collapse: collapse; font-size: 14px; }
table.watch th {
  text-align: left; color: var(--ink-dim); font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding-bottom: 8px; border-bottom: 1px solid var(--panel-edge);
}
table.watch td { padding: 9px 0; border-bottom: 1px solid #262c34; vertical-align: top; }
table.watch td:first-child { padding-right: 16px; font-weight: 600; width: 42%; }
table.watch td:last-child { color: var(--ink-dim); }

/* ---- lesson index -------------------------------------------------------- */

.lesson-grid { display: grid; gap: 10px; margin-bottom: 20px; }

.lesson-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--panel-edge);
  border-left: 4px solid var(--orange);
  border-radius: 12px; padding: 14px 16px;
}
.lesson-card:hover { border-color: var(--orange); }
.lesson-number {
  font-family: var(--mono); font-size: 12px; color: var(--orange); font-weight: 700;
}
.lesson-title { display: block; font-size: 19px; font-weight: 800; margin: 2px 0; }
.lesson-sub { display: block; font-size: 13px; color: var(--ink-dim); }
.lesson-goal { display: block; font-size: 13px; margin-top: 8px; }

/* ---- hub tiles ----------------------------------------------------------- */

.tile-grid { display: grid; gap: 12px; margin: 22px 0; }
.tile {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--panel-edge);
  border-radius: 14px; padding: 18px;
}
.tile:hover { border-color: var(--orange); }
.tile-primary { border-color: var(--orange); background: #241a12; }
.tile-title { display: block; font-size: 21px; font-weight: 800; margin-bottom: 6px; }
.tile-note { display: block; font-size: 14px; color: var(--ink-dim); }
.tile-go { display: block; margin-top: 12px; font-weight: 700; color: var(--orange); }

.plain-list { margin-left: 20px; }
.plain-list a { color: var(--ink); }

/* ---- page turns ---------------------------------------------------------- */

.page-turns { display: flex; justify-content: space-between; gap: 10px; margin-top: 24px; }
.page-turn {
  flex: 1; text-decoration: none; color: var(--ink);
  background: var(--panel); border: 1px solid var(--panel-edge);
  border-radius: 10px; padding: 13px 14px; font-size: 13px; font-weight: 700;
}
.page-turn:last-child { text-align: right; }
.page-turn:hover { border-color: var(--orange); }

/* ---- wider screens ------------------------------------------------------- */

@media (min-width: 720px) {
  h1 { font-size: 34px; }
  .lesson-grid { grid-template-columns: repeat(2, 1fr); }
  .tile-grid { grid-template-columns: repeat(3, 1fr); }
  .page { padding: 30px 20px 80px; }
}

/* ---- cheat sheet --------------------------------------------------------- */

.sheet-title { margin-bottom: 4px; }
.sheet-note { font-size: 12px; color: var(--ink-dim); margin-bottom: 8px; }
.sheet-columns { display: grid; gap: 12px; margin-top: 16px; }
.sheet .card h2 { margin-bottom: 8px; }
.sheet table.watch td { padding: 5px 0; font-size: 13px; }
.sheet table.watch td:first-child { font-family: var(--mono); width: 38%; font-weight: 400; }

@media (min-width: 720px) {
  .sheet-columns { grid-template-columns: repeat(2, 1fr); }
}

/* ---- printing -----------------------------------------------------------
   Lesson pages get printed for the table and the cheat sheet gets taped to
   it. Dark themes waste toner and read badly on paper, so print flips to
   ink-on-white and drops anything that is only useful on screen.
   ------------------------------------------------------------------------- */

@media print {
  html, body { background: #fff; color: #000; font-size: 11pt; }
  .no-print, .site-nav, .site-header, .page-turns, .copy-button { display: none !important; }
  .page { max-width: none; padding: 0; }
  .card {
    background: #fff; border: 1px solid #999; border-radius: 0;
    padding: 10px 12px; margin-bottom: 10px;
    break-inside: avoid; page-break-inside: avoid;
  }
  .card.goal, .card.sense, .card.teacher { border-left: 3px solid #000; }
  h1 { font-size: 20pt; }
  h2 { color: #000; font-size: 10pt; }
  .subtitle, .sheet-note, .hint, .lesson-sub { color: #444; }
  pre.program { background: #f2f2f2; color: #000; border: 1px solid #999; }
  table.watch td:last-child { color: #333; }
  .sheet-columns { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  /* Teacher notes are collapsed on screen; on paper they should be readable. */
  details.teacher > summary { color: #000; }
  details.teacher > p { display: block; }
  details.teacher > summary::after { content: " (printed for the grown-up)"; font-weight: 400; }
  a { color: #000; text-decoration: none; }
}