/* Color scheme, after the SMT course site turned inside out: a white ground,
   the site's blue for rules, accents, and buttons, and its green for text
   selection and link hover. Nothing below carries a literal color. */
:root {
  --bg:      #ffffff;
  --fg:      #111111;
  --fg-dim:  #555566;
  --blue:    #2424e0;
  --blue-fg: #ffffff;              /* text on blue: hovered and active buttons */
  --hi:      #00ff00;              /* highlighter: text selection, link hover */
  --hi-fg:   #000000;
  /* Status, softened. --x is the mark, --x-tint fills a chip. */
  --yes:     #6fca8d;  --yes-tint:  #e3f6e9;
  --cond:    #f2c94c;  --cond-tint: #fdf3cf;
  --no:      #f08a94;  --no-tint:   #fde3e5;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font: 14px/1.6 'Roboto Mono', monospace;
  color: var(--fg);
  background: var(--bg);
}
::selection { background: var(--hi); color: var(--hi-fg); }
a { color: var(--blue); text-decoration: underline; }
a:hover { background: var(--hi); color: var(--hi-fg); text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
[hidden] { display: none !important; }

main { max-width: 1440px; margin: 0 auto; padding: 2rem 2rem 3rem; }
h1 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1.5rem; }
h2 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.25rem; }
.step { display: block; font-size: 0.72rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--blue); margin-bottom: 0.2rem; }
.hint { font-size: 0.78rem; color: var(--fg-dim); margin-bottom: 0.9rem; }

/* Three columns: the short steps, the uses, and the policy they build,
   which runs from below the title to the bottom of the longer step column. */
.layout {
  display: grid; gap: 2rem 2.5rem; align-items: start;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr) minmax(0, 1.25fr);
  grid-template-areas: "title title title" "left mid right";
}
.col { display: flex; flex-direction: column; gap: 2rem; min-width: 0; }
#left { grid-area: left; } #mid { grid-area: mid; } #right { grid-area: right; }
.top {
  grid-area: title; display: flex; justify-content: space-between; align-items: flex-start; gap: 1.5rem;
  padding-bottom: 1.25rem; border-bottom: 1px solid var(--blue);
}
.top h1 { margin-bottom: 0.4rem; }
.lede { font-size: 0.8rem; color: var(--fg-dim); max-width: 78ch; }
.top > .pill { flex-shrink: 0; text-decoration: none; color: var(--fg); }
#policyBox { grid-area: policy; }
#s1 { grid-area: s1; } #s2 { grid-area: s2; } #s3 { grid-area: s3; } #s4 { grid-area: s4; } #s5 { grid-area: s5; }
/* The step columns set the height; contain: size keeps the right column from
   adding to it. The policy takes what step 5 leaves and scrolls inside. */
@media (min-width: 701px) {
  #right { align-self: stretch; contain: size; }
  #policyBox { flex: 1; min-height: 0; display: flex; flex-direction: column; }
  #policyBox .policy-text { flex: 1; overflow-y: auto; }
}

/* Pills, as in the course site's nav */
.pills { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.pill {
  border: 1px solid var(--blue); border-radius: 50px;
  padding: 0.3rem 0.8rem; font-size: 0.78rem; white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}
.pill:hover, .pill[aria-pressed="true"], .pill[aria-checked="true"] { background: var(--blue); color: var(--blue-fg); }
.pill[aria-pressed="true"], .pill[aria-checked="true"] { font-weight: 700; }
.pill:disabled { opacity: 0.4; pointer-events: none; }

/* Policy */
.policy { border: 1px solid var(--blue); border-radius: 16px; padding: 1.1rem 1.25rem 0.9rem; background: var(--bg); }
.policy-text { position: relative; font-size: 0.85rem; line-height: 1.7; overflow: hidden; }
.policy-text p + p, .policy-text p + ul, .policy-text ul + p { margin-top: 0.7rem; }
.policy-text ul { padding-left: 1.2rem; margin-top: 0.3rem; }
.policy-text .empty { color: var(--fg-dim); }
@media (max-width: 700px) {
  .policy.collapsed .policy-text { max-height: 10.2em; }
  .policy.collapsed.overflows .policy-text::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 3.4em;
    background: linear-gradient(rgba(255, 255, 255, 0), var(--bg));
  }
}
.policy-actions { display: flex; gap: 0.4rem; align-items: center; margin-top: 0.8rem; flex-wrap: wrap; }
.policy-actions .status { font-size: 0.75rem; color: var(--fg-dim); margin-left: auto; }

/* Step 1 */
.levels { display: grid; gap: 0.5rem; }
.level {
  text-align: left; border: 1px solid var(--blue); border-radius: 14px;
  padding: 0.6rem 0.9rem; display: grid; gap: 0.15rem;
  transition: background 0.15s ease, color 0.15s ease;
}
.level:hover { background: var(--blue); color: var(--blue-fg); }
.level:hover span { color: var(--blue-fg); }
.level[aria-checked="true"], .level[aria-checked="true"]:hover { background: var(--tint); color: var(--fg); }
.level[aria-checked="true"] span { color: var(--fg); }
.level strong { font-size: 0.85rem; display: flex; align-items: center; gap: 0.5rem; }
.level strong i { width: 10px; height: 10px; border-radius: 50%; background: var(--tone); flex-shrink: 0; }
.level span { font-size: 0.74rem; color: var(--fg-dim); line-height: 1.5; }
.level.red { --tone: var(--no); --tint: var(--no-tint); }
.level.yellow { --tone: var(--cond); --tint: var(--cond-tint); }
.level.green { --tone: var(--yes); --tint: var(--yes-tint); }
.core-note { font-size: 0.75rem; color: var(--fg-dim); margin-top: 0.7rem; }

/* Step 3: one dashed tray per medium, its name set into the top edge */
.legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; font-size: 0.75rem; color: var(--fg-dim); margin-bottom: 1rem; }
.legend span { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend i { width: 10px; height: 10px; border-radius: 50%; }
/* Packed in two columns with one gap across and down. The legend pill sits
   above each box's border, so the gap is measured to the pill's top. */
.media { columns: 2; column-gap: 1.25rem; }
.medium { break-inside: avoid; margin-bottom: 1.25rem; }
.media.inactive { opacity: 0.4; pointer-events: none; }
.medium { border: 1.5px dashed var(--blue); border-radius: 24px; padding: 0.4rem 0.8rem 0.8rem; min-width: 0; width: 100%; }
.medium legend {
  margin: 0 auto; padding: 0.15rem 0.8rem; border: 1px solid var(--blue); border-radius: 50px;
  background: var(--bg); font-size: 0.8rem; font-weight: 700;
}
.medium.core legend { background: var(--blue); color: var(--blue-fg); }
.medium.core legend::after { content: ' · core'; font-weight: 400; }
.medium .tally { font-size: 0.7rem; color: var(--fg-dim); text-align: center; margin-bottom: 0.6rem; }
.uses { display: flex; flex-direction: column; gap: 0.35rem; }
.use {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem;
  border: 1px solid var(--blue); border-radius: 50px;
  padding: 0.2rem 0.3rem 0.2rem 0.75rem; font-size: 0.76rem; text-align: left;
}
.use.yes { background: var(--yes-tint); }
.use.cond { background: var(--cond-tint); border-radius: 16px; padding-bottom: 0.4rem; }
.use.no { background: var(--no-tint); }
.use .label { flex: 1; min-width: 0; }
.use .label abbr { text-decoration: none; cursor: help; border-bottom: 1px dotted var(--fg-dim); }
.tri { display: inline-flex; gap: 3px; }
.tri button {
  width: 19px; height: 19px; border-radius: 50%; border: 2px solid var(--c); background: var(--bg);
  color: transparent; font-size: 10px; font-weight: 700; line-height: 1; display: grid; place-items: center;
}
.tri button:hover { background: var(--blue); border-color: var(--blue); }
.tri button[aria-checked="true"] { background: var(--c); color: var(--fg); }
.tri .yes { --c: var(--yes); } .tri .cond { --c: var(--cond); } .tri .no { --c: var(--no); }
.use input {
  flex-basis: 100%; border: 1px solid var(--blue); border-radius: 8px; background: var(--bg);
  padding: 0.3rem 0.5rem; font-size: 0.74rem; margin-right: 0.3rem;
}

/* Steps 4 and 5 */
.sub { font-size: 0.8rem; font-weight: 700; margin: 0.9rem 0 0.45rem; }
#s4 .sub:first-of-type { margin-top: 0.4rem; }
.pills.disabled { opacity: 0.4; pointer-events: none; }
#when .pill { white-space: normal; text-align: left; border-radius: 16px; }
#extra {
  display: block; width: 100%; resize: vertical; border: 1px solid var(--blue); border-radius: 12px;
  background: var(--bg); padding: 0.6rem 0.8rem; font-size: 0.8rem; line-height: 1.6;
}
#extra::placeholder, .use input::placeholder { color: var(--fg-dim); }

footer { margin-top: 3rem; padding-top: 0.8rem; border-top: 1px solid var(--blue); font-size: 0.72rem; display: flex; justify-content: flex-end; }
footer button { text-decoration: underline; color: var(--blue); }
footer button:hover { background: var(--blue); color: var(--blue-fg); text-decoration: none; }

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    grid-template-areas: "title title" "s1 right" "s2 right" "s3 right" "s4 right";
  }
  #left, #mid { display: contents; }
}
@media (max-width: 700px) {
  main { padding: 1.5rem 16px 2.5rem; }
  .top { flex-direction: column; gap: 0.8rem; }
  .layout { grid-template-columns: 1fr; grid-template-areas: "title" "policy" "s1" "s2" "s3" "s4" "s5"; }
  .col { display: contents; }
  .media { columns: 1; }
}
@media print {
  main > footer, .layout > :not(#right), #s5 { display: none !important; }
  .layout, #right { display: block; contain: none; }
  .policy { border: 0; padding: 0; }
  .policy.collapsed .policy-text { max-height: none; }
  .policy-text::after, .policy-actions { display: none !important; }
}

/* Reference syllabi page */
.refs-page { max-width: 960px; }
.refs-page .top { margin-bottom: 2rem; }
.top-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-content: flex-end; }
.top-actions .pill, .add-link { text-decoration: none; color: var(--fg); }
.add-link { display: inline-block; margin-bottom: 1rem; }
.refs { display: grid; gap: 1rem; }
.syllabus { border: 1px solid var(--blue); border-radius: 16px; padding: 1rem 1.25rem; }
.syllabus h2 a { color: var(--fg); }
.syllabus .faculty { font-size: 0.8rem; color: var(--fg-dim); }
.syllabus blockquote { margin-top: 0.8rem; padding-left: 0.9rem; border-left: 1.5px dashed var(--blue); font-size: 0.8rem; line-height: 1.7; }
.syllabus blockquote p + p { margin-top: 0.6rem; }
@media (max-width: 700px) {
  .top-actions { justify-content: flex-start; }
}