/* philtulip.com · Learn — shared styles for every course.
   A course can set --accent, --accent-2 and --accent-ink in its own course.css. */

@import url("/css/site.css");

:root {
  --accent: #5fd0ff;
  --accent-2: #ff8a3d;
  --accent-ink: #061018;
  --ok: #7ff5c8;
  --bad: #ff6a5c;
  --read: #d6e0ee;
}

body { font-size: 15px; }

/* ---------- Top bar ---------- */

.lbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 10px 16px;
  flex-wrap: wrap;
  padding: 8px var(--gutter);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lbar__crumbs { display: flex; align-items: center; gap: 8px; min-height: 40px; flex: 1 1 auto; }
.lbar__crumbs a { color: var(--ink-2); text-decoration: none; }
.lbar__crumbs a:hover { color: var(--accent); }
.lbar__crumbs span[aria-hidden] { color: var(--ink-3); }
.lbar__dots { display: flex; gap: 5px; list-style: none; margin: 0; padding: 0; }
.lbar__dots a {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  color: var(--ink-3);
  font-size: 11px;
  letter-spacing: 0;
  text-decoration: none;
}
.lbar__dots a:hover { border-color: var(--accent); color: var(--ink); }
.lbar__dots a.is-done { background: color-mix(in srgb, var(--ok) 18%, transparent); border-color: var(--ok); color: var(--ok); }
.lbar__dots a[aria-current="page"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
@media (max-width: 640px) { .lbar__dots { display: none; } }

/* ---------- Big titles: longest word in characters (build.mjs fitStyle) ---------- */

[data-chars="1"] { --chars: 1; }
[data-chars="2"] { --chars: 2; }
[data-chars="3"] { --chars: 3; }
[data-chars="4"] { --chars: 4; }
[data-chars="5"] { --chars: 5; }
[data-chars="6"] { --chars: 6; }
[data-chars="7"] { --chars: 7; }
[data-chars="8"] { --chars: 8; }
[data-chars="9"] { --chars: 9; }
[data-chars="10"] { --chars: 10; }
[data-chars="11"] { --chars: 11; }
[data-chars="12"] { --chars: 12; }
[data-chars="13"] { --chars: 13; }
[data-chars="14"] { --chars: 14; }
[data-chars="15"] { --chars: 15; }
[data-chars="16"] { --chars: 16; }
[data-chars="17"] { --chars: 17; }
[data-chars="18"] { --chars: 18; }
[data-chars="19"] { --chars: 19; }
[data-chars="20"] { --chars: 20; }
[data-chars="21"] { --chars: 21; }
[data-chars="22"] { --chars: 22; }
[data-chars="23"] { --chars: 23; }
[data-chars="24"] { --chars: 24; }
[data-chars="25"] { --chars: 25; }
[data-chars="26"] { --chars: 26; }
[data-chars="27"] { --chars: 27; }
[data-chars="28"] { --chars: 28; }
[data-chars="29"] { --chars: 29; }
[data-chars="30"] { --chars: 30; }

/* ---------- Lesson layout ---------- */

.lesson { max-width: 900px; margin: 0 auto; padding: clamp(24px, 5vw, 56px) var(--gutter) 40px; }

.lesson-head { margin-bottom: 28px; container-type: inline-size; }
.kicker { margin: 0; color: var(--accent); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; }
.lesson-head h1 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  /* Never wider than the column: --chars is the longest word (set by the build). An uppercase
     letter is about 0.63em wide on average; 0.7 leaves room. learn.js shrinks it more if needed. */
  font-size: min(clamp(36px, 8vw, 72px), 100cqi / (var(--chars, 10) * 0.7));
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-wrap: balance;
}
.lede { margin: 0; max-width: 62ch; font-family: var(--font-read); font-size: 20px; line-height: 1.55; color: var(--read); }
.goals {
  margin: 22px 0 0;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--panel);
}
.goals p { margin: 0 0 6px; color: var(--ink-3); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; }
.goals ul { margin: 0; padding-left: 18px; color: var(--ink-2); }
.goals li + li { margin-top: 3px; }

.block { margin: 44px 0 0; }
.block > h2 {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 34px);
  text-transform: uppercase;
  line-height: 1.05;
}
.chip {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  vertical-align: middle;
}
.chip--try { background: var(--accent); color: var(--accent-ink); }
.chip--name { background: var(--accent-2); color: #160a02; }
.chip--check { background: var(--ok); color: #03140d; }
.chip--field { border: 1px solid var(--line-2); color: var(--ink-2); }

.prose-l { font-family: var(--font-read); font-size: 18.5px; line-height: 1.65; color: var(--read); max-width: 66ch; }
.prose-l p { margin: 0 0 1em; }
.prose-l ul, .prose-l ol { margin: 0 0 1em; padding-left: 1.2em; }
.prose-l li + li { margin-top: 0.3em; }
.prose-l b, .prose-l strong { color: #fff; font-weight: 600; }
.prose-l .hl { color: var(--accent); font-weight: 600; }
.prose-l .hl2 { color: var(--accent-2); font-weight: 600; }

.callout {
  margin: 18px 0;
  padding: 14px 18px;
  max-width: 66ch;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--bg-2);
  font-family: var(--font-read);
  font-size: 17px;
  color: var(--read);
}
.callout b { color: var(--accent-2); }

/* ---------- Labs ---------- */

.lab {
  margin: 18px 0 8px;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  background: var(--panel);
  overflow: hidden;
}
.lab__head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.lab__head b { color: var(--accent); font-weight: 600; }
.lab__stage { position: relative; background: #000; }
.lab__stage canvas { display: block; width: 100%; height: auto; touch-action: none; }
.lab__stage--pair { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.lab__stage--map { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 2px; }
@media (max-width: 640px) { .lab__stage--map, .lab__stage--pair { grid-template-columns: 1fr; } }
.lab__cap {
  position: absolute;
  left: 8px;
  top: 8px;
  padding: 2px 7px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 2px;
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: none;
}
.lab__cell { position: relative; }

.lab__controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 14px 20px;
  padding: 14px;
  border-top: 1px solid var(--line);
}
.ctl { display: grid; gap: 6px; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); }
.ctl output { float: right; color: var(--ink); font-weight: 600; letter-spacing: 0.02em; text-transform: none; }
.ctl--wide { grid-column: 1 / -1; }
input[type="range"] { width: 100%; accent-color: var(--accent); min-height: 28px; margin: 0; }

.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button, .btn {
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  background: var(--bg-2);
  color: var(--ink-2);
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}
.seg button:hover, .btn:hover { border-color: var(--accent); color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn--primary:hover { color: var(--accent-ink); filter: brightness(1.1); }
.btn:disabled { opacity: 0.45; cursor: default; }

.readout {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  font-size: 12px;
  color: var(--ink-3);
}
.readout b { color: var(--ink); font-weight: 600; }

.verdict {
  margin: 0;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-read);
  font-size: 17px;
  line-height: 1.5;
  color: var(--read);
  min-height: 3.2em;
}
.verdict b { color: var(--accent); }
.verdict .good { color: var(--ok); }
.verdict .warn { color: var(--hazard); }

.task {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
.task li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-family: var(--font-read);
  font-size: 17px;
  color: var(--read);
}
.task li::before { content: "○"; color: var(--ink-3); font-family: var(--font-mono); }
.task li.is-done::before { content: "●"; color: var(--ok); }
.task li.is-done { color: var(--ink-2); }

/* ---------- Term cards ---------- */

.terms {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr));
  gap: 10px;
  margin: 16px 0;
  padding: 0;
}
.terms > div {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.terms dt { font-family: var(--font-display); font-weight: 600; font-size: 18px; text-transform: uppercase; color: var(--accent); }
.terms dt small { margin-left: 6px; color: var(--ink-3); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; }
.terms dd { margin: 6px 0 0; font-family: var(--font-read); font-size: 16px; line-height: 1.5; color: var(--read); }

table.tbl { width: 100%; max-width: 760px; border-collapse: collapse; margin: 14px 0; font-size: 13px; }
.tbl th, .tbl td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { color: var(--ink-3); font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; font-size: 11px; }
.tbl td:first-child { color: var(--accent); white-space: nowrap; }
.tbl-wrap { overflow-x: auto; }

/* ---------- Checks ---------- */

.q {
  margin: 0 0 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.q__prompt { margin: 0 0 12px; font-family: var(--font-read); font-size: 18px; color: #fff; }
.q__opts { display: grid; gap: 8px; }
.q__opts button {
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  background: var(--bg-2);
  color: var(--ink);
  text-align: left;
  font: 400 15px/1.4 var(--font-read);
  cursor: pointer;
}
.q__opts button:hover:not(:disabled) { border-color: var(--accent); }
.q__opts button.is-wrong { border-color: var(--bad); color: var(--ink-3); text-decoration: line-through; }
.q__opts button.is-right { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, var(--bg-2)); }
.q__opts button:disabled { cursor: default; }
.q__why { display: none; margin: 12px 0 0; font-family: var(--font-read); font-size: 16px; color: var(--ink-2); }
.q.is-answered .q__why { display: block; }
.q__why::before { content: "✓ "; color: var(--ok); font-family: var(--font-mono); }

.lesson-status {
  margin: 18px 0 0;
  padding: 12px 16px;
  border: 1px dashed var(--line-2);
  border-radius: var(--radius);
  color: var(--ink-2);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  justify-content: space-between;
}
.lesson-status.is-done { border-style: solid; border-color: var(--ok); color: var(--ok); }

/* ---------- Pager + footer ---------- */

.pager {
  max-width: 900px;
  margin: 24px auto 0;
  padding: 0 var(--gutter) 40px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.pager a {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
}
.pager a:hover { border-color: var(--accent); }
.pager span { color: var(--ink-3); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; }
.pager b { font-family: var(--font-display); font-size: 18px; text-transform: uppercase; }
.pager a[rel="next"] { grid-column: 2; text-align: right; }
/* Narrow screens: one link per row, so a long title such as "Cinematography" always fits. */
@media (max-width: 480px) {
  .pager { grid-template-columns: minmax(0, 1fr); }
  .pager a[rel="next"] { grid-column: 1; }
}
/* Words with a hyphen ("180-degree") stay on one line in big titles. */
.nobr { white-space: nowrap; }

/* ---------- Course home ---------- */

.course-hero { padding: clamp(28px, 6vw, 64px) var(--gutter) 10px; max-width: 1000px; margin: 0 auto; container-type: inline-size; }
.course-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  /* Same rule as .lesson-head h1: the longest word always fits the column. */
  font-size: min(clamp(38px, 9.5vw, 108px), 100cqi / (var(--chars, 10) * 0.7));
  line-height: 0.9;
}
.course-hero__cover { margin: 26px 0 0; border: 1px solid var(--line-2); border-radius: 6px; overflow: hidden; aspect-ratio: 16 / 9; max-height: 420px; width: 100%; }
.course-hero__cover img { display: block; width: 100%; height: 100%; object-fit: cover; }
.course-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 22px; }
.course-actions .btn { display: inline-flex; align-items: center; text-decoration: none; min-height: 44px; padding: 0 18px; }
.course-actions [data-course-progress] { color: var(--ink-3); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }

.syllabus { max-width: 1000px; margin: 0 auto; padding: 24px var(--gutter) 60px; }
.syllabus > h2 { font-family: var(--font-display); text-transform: uppercase; font-size: 28px; margin: 0 0 14px; }
.syllabus > ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.syllabus li a {
  display: grid;
  grid-template-columns: 54px 1fr auto;
  gap: 4px 16px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 160ms, transform 160ms;
}
.syllabus li a:hover { border-color: var(--accent); transform: translateX(3px); }
.syllabus .n { grid-row: span 2; font-family: var(--font-display); font-size: 34px; font-weight: 700; color: var(--line-2); text-align: center; }
.syllabus .t { font-family: var(--font-display); font-weight: 600; font-size: 21px; text-transform: uppercase; }
.syllabus .d { grid-column: 2; color: var(--ink-2); font-family: var(--font-read); font-size: 16px; }
.syllabus .m { grid-row: 1 / span 2; grid-column: 3; color: var(--ink-3); font-size: 12px; text-align: right; }
.syllabus li.is-done .n { color: var(--ok); }
.syllabus li.is-done .m::after { content: " ✓"; color: var(--ok); }
@media (max-width: 520px) {
  .syllabus li a { grid-template-columns: 38px 1fr; }
  .syllabus .n { font-size: 24px; }
  .syllabus .m { grid-row: auto; grid-column: 2; text-align: left; }
}

.lfoot {
  border-top: 1px solid var(--line);
  padding: 22px var(--gutter) 40px;
  color: var(--ink-3);
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}
.lfoot a { color: var(--ink-2); }
.lfoot button { background: none; border: 0; padding: 0; color: var(--ink-3); font: inherit; text-decoration: underline; cursor: pointer; }

.course-about { margin-top: 40px; }
.course-about h2 { font-size: 22px; margin: 1.6em 0 0.5em; }