/* Mid-Terms Library — everything scoped under .mtl so the theme stays in charge. */
.mtl {
  --mtl-ink: currentColor;
  --mtl-muted: rgba(0, 0, 0, .62);
  --mtl-line: rgba(0, 0, 0, .14);
  --mtl-soft: rgba(0, 0, 0, .04);
  --mtl-accent: #1d4ed8;
  --mtl-accent-ink: #fff;
  --mtl-radius: 10px;
  --mtl-ss: #b45309;
  --mtl-ela: #7c3aed;
  --mtl-math: #0f766e;
  --mtl-sci: #15803d;
  font: inherit;
  line-height: 1.5;
  box-sizing: border-box;
  max-width: 100%;
}
.mtl *, .mtl *::before, .mtl *::after { box-sizing: inherit; }
@media (prefers-color-scheme: dark) {
  .mtl { --mtl-muted: rgba(255, 255, 255, .68); --mtl-line: rgba(255, 255, 255, .18); --mtl-soft: rgba(255, 255, 255, .06); --mtl-accent: #60a5fa; --mtl-accent-ink: #0b1220; }
}
.mtl a { color: inherit; }
.mtl [hidden] { display: none !important; }

/* buttons + fields */
.mtl-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4em;
  padding: .6em 1em; min-height: 44px; border-radius: 8px; border: 1px solid var(--mtl-line);
  background: transparent; color: inherit; font: inherit; font-weight: 600; font-size: .95em;
  cursor: pointer; text-decoration: none !important; line-height: 1.2;
}
.mtl-btn:hover { background: var(--mtl-soft); }
.mtl-btn-primary { background: var(--mtl-accent); border-color: var(--mtl-accent); color: var(--mtl-accent-ink) !important; }
.mtl-btn-primary:hover { filter: brightness(1.08); background: var(--mtl-accent); }
.mtl-mini { font: inherit; font-size: .78em; padding: .2em .6em; border: 1px solid var(--mtl-line); background: transparent; color: inherit; border-radius: 6px; cursor: pointer; }
.mtl-mini:disabled { opacity: .4; cursor: not-allowed; }
.mtl-actions { display: flex; flex-wrap: wrap; gap: .5em; margin: 1em 0; }
.mtl-actions-stack { flex-direction: column; }
.mtl-field { display: flex; flex-direction: column; gap: .25em; font-size: .9em; flex: 1 1 140px; min-width: 0; margin: 0 0 .75em; }
.mtl-field > span { font-weight: 600; color: var(--mtl-muted); }
.mtl-field input, .mtl-field select, .mtl-field textarea, .mtl-custom textarea {
  font: inherit; font-size: 1em; padding: .55em .7em; min-height: 44px; width: 100%;
  border: 1px solid var(--mtl-line); border-radius: 8px; background: transparent; color: inherit;
}
.mtl-field select option, .mtl-field select optgroup { color: #111; background: #fff; }
.mtl-row { display: flex; flex-wrap: wrap; gap: .75em; }
.mtl-check { display: flex; gap: .5em; align-items: flex-start; font-size: .92em; margin: .3em 0; cursor: pointer; }
.mtl-check input { margin-top: .3em; width: 1.05em; height: 1.05em; flex: none; }
.mtl-hint { font-size: .85em; color: var(--mtl-muted); margin: .25em 0 .75em; }
.mtl-error { color: #b91c1c; font-size: .9em; }

/* tags */
.mtl-tags { display: flex; flex-wrap: wrap; gap: .4em; margin-bottom: .6em; }
.mtl-tag { font-size: .78em; font-weight: 700; letter-spacing: .02em; padding: .25em .65em; border-radius: 999px; background: var(--mtl-soft); border: 1px solid var(--mtl-line); }
.mtl-tag-social-studies { --c: var(--mtl-ss); }
.mtl-tag-ela { --c: var(--mtl-ela); }
.mtl-tag-math { --c: var(--mtl-math); }
.mtl-tag-science { --c: var(--mtl-sci); }
.mtl-tag[class*="mtl-tag-"] { border-color: var(--c, var(--mtl-line)); color: var(--c, inherit); }
.mtl-dot { display: inline-block; width: .6em; height: .6em; border-radius: 50%; background: var(--c, var(--mtl-accent)); margin-right: .5em; vertical-align: middle; }

/* library */
.mtl-hero { margin: 0 0 1.25em; }
.mtl-kicker { text-transform: uppercase; letter-spacing: .08em; font-size: .78em; font-weight: 700; color: var(--mtl-muted); margin: 0 0 .25em; }
.mtl-hero-title { margin: 0 0 .35em; font-size: clamp(1.6em, 4vw, 2.3em); line-height: 1.15; }
.mtl-lede { margin: 0 0 .5em; font-size: 1.05em; }
.mtl-lede a { color: var(--mtl-accent); }
.mtl-filters { display: flex; flex-wrap: wrap; gap: .75em; padding: 1em; border: 1px solid var(--mtl-line); border-radius: var(--mtl-radius); background: var(--mtl-soft); margin-bottom: .5em; }
.mtl-field-grow { flex: 2 1 220px; }
.mtl-filters .mtl-field { margin: 0; }
.mtl-count { font-size: .9em; color: var(--mtl-muted); margin: .5em 0 1em; }
.mtl-course { margin: 0 0 2em; }
.mtl-course-title { font-size: 1.25em; margin: 0 0 .6em; }
.mtl-course-title small { font-size: .7em; font-weight: 500; color: var(--mtl-muted); margin-left: .35em; }
.mtl-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .6em; }
.mtl-card {
  display: flex; flex-direction: column; gap: .2em; padding: .85em 1em; border: 1px solid var(--mtl-line);
  border-radius: var(--mtl-radius); text-decoration: none !important; color: inherit; transition: border-color .15s, transform .15s;
}
.mtl-card:hover, .mtl-card:focus-visible { border-color: var(--mtl-accent); transform: translateY(-1px); }
.mtl-card-kind { font-weight: 700; }
.mtl-card-meta { font-size: .85em; color: var(--mtl-accent); font-weight: 600; }
.mtl-card-units { font-size: .8em; color: var(--mtl-muted); line-height: 1.35; }
.mtl-empty { padding: 2em; text-align: center; color: var(--mtl-muted); }

/* exam page */
.mtl-crumbs { font-size: .88em; color: var(--mtl-muted); margin: 0 0 1em; }
.mtl-crumbs span { margin: 0 .35em; }
.mtl-crumbs a { color: var(--mtl-accent); }
.mtl-exam-intro { margin-bottom: 1.25em; }
.mtl-related { margin-top: 2em; padding-top: 1em; border-top: 1px solid var(--mtl-line); }
.mtl-related h2 { font-size: 1.15em; }
.mtl-related ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .35em 1em; }
.mtl-related a { color: var(--mtl-accent); font-weight: 600; }
.mtl-related span { font-size: .82em; color: var(--mtl-muted); }

/* the paper (screen) */
.mtl-paper, .mtl-key {
  background: #fff; color: #111; border: 1px solid rgba(0, 0, 0, .12); border-radius: var(--mtl-radius);
  padding: clamp(1em, 4vw, 2.25em); margin: 0 0 1.25em; box-shadow: 0 1px 3px rgba(0, 0, 0, .06);
  font-size: 1rem; line-height: 1.45;
}
.mtl-key { background: #fffbea; }
.mtl-paper-head { border-bottom: 2px solid #111; padding-bottom: .75em; margin-bottom: 1em; }
.mtl-paper-title { font-size: 1.3em; font-weight: 800; line-height: 1.25; margin-bottom: .35em; }
.mtl-version { display: inline-block; font-size: .7em; padding: .1em .5em; border: 1.5px solid #111; border-radius: 4px; vertical-align: middle; margin-left: .3em; }
.mtl-paper-sub { color: #444; margin-bottom: .5em; }
.mtl-fields { display: flex; flex-wrap: wrap; gap: .5em 1.5em; margin: .6em 0; }
.mtl-fields span { display: flex; align-items: flex-end; gap: .35em; flex: 1 1 140px; }
.mtl-fields span:first-child { flex-grow: 2; }
.mtl-fields i { flex: 1; border-bottom: 1px solid #111; height: 1.1em; min-width: 50px; }
.mtl-directions, .mtl-covers { margin: .4em 0 0; font-size: .92em; }
.mtl-section { font-size: 1.08em; margin: 1.1em 0 .6em; padding: 0; border: 0; color: #111; }
.mtl-questions, .mtl-written, .mtl-key-list { margin: 0; padding-left: 1.8em; }
.mtl-q, .mtl-w { margin: 0 0 1em; break-inside: avoid; page-break-inside: avoid; position: relative; }
.mtl-stem { font-weight: 600; margin-bottom: .3em; }
.mtl-choices { list-style: none; margin: 0; padding: 0 0 0 .25em; display: grid; gap: .15em; }
.mtl-letter { display: inline-block; min-width: 1.6em; font-weight: 700; }
.mtl-lines i { display: block; border-bottom: 1px solid #999; height: 1.9em; }
.mtl-key-list li { margin-bottom: .35em; }
.mtl-exp { display: block; font-size: .88em; color: #555; font-style: italic; }
.mtl-edit { float: right; display: inline-flex; gap: .3em; margin-left: .5em; }
.mtl-paper .mtl-mini { color: #111; border-color: rgba(0, 0, 0, .2); background: #fff; }

/* maker */
.mtl-maker-grid { display: grid; grid-template-columns: minmax(260px, 340px) 1fr; gap: 1.5em; align-items: start; }
.mtl-panel { border: 1px solid var(--mtl-line); border-radius: var(--mtl-radius); padding: 1.1em; position: sticky; top: 1em; max-height: calc(100vh - 2em); overflow: auto; }
.mtl-panel-title { font-size: 1em; margin: .9em 0 .5em; }
.mtl-panel-title:first-child { margin-top: 0; }
.mtl-units { border: 0; padding: 0; margin: 0 0 .5em; }
.mtl-units legend { font-size: .9em; font-weight: 600; color: var(--mtl-muted); padding: 0; margin-bottom: .2em; }
.mtl-custom { margin: 1em 0 .5em; border-top: 1px solid var(--mtl-line); padding-top: .75em; }
.mtl-custom summary { font-weight: 700; cursor: pointer; }
.mtl-custom textarea { display: block; max-width: 100%; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .85em; min-height: 140px; }
.mtl-preview-bar { display: flex; flex-wrap: wrap; align-items: center; gap: .5em 1em; margin-bottom: .75em; font-size: .92em; }
.mtl-preview-bar [data-summary] { color: var(--mtl-muted); }
.mtl-tabs { display: inline-flex; gap: .3em; margin-left: auto; }
.mtl-tab { font: inherit; font-size: .88em; font-weight: 700; min-width: 40px; min-height: 36px; padding: .25em .7em; border-radius: 6px; border: 1px solid var(--mtl-line); background: transparent; color: inherit; cursor: pointer; }
.mtl-tab.is-active { background: var(--mtl-accent); border-color: var(--mtl-accent); color: var(--mtl-accent-ink); }
.mtl-loading { color: var(--mtl-muted); }
@media (max-width: 820px) {
  .mtl-maker-grid { grid-template-columns: 1fr; }
  .mtl-panel { position: static; max-height: none; }
  .mtl-tabs { margin-left: 0; }
}

/* print: only the injected print root */
.mtl-print-root { display: none; }
@media print {
  body.mtl-printing > *:not(.mtl-print-root) { display: none !important; }
  body.mtl-printing .mtl-print-root { display: block !important; }
  body.mtl-printing { background: #fff !important; margin: 0 !important; padding: 0 !important; }
  .mtl-print-root .mtl-paper, .mtl-print-root .mtl-key {
    border: 0; box-shadow: none; border-radius: 0; padding: 0; margin: 0; background: #fff; font-size: 11.5pt; color: #000;
  }
  .mtl-print-root .mtl-paper + .mtl-paper, .mtl-print-root .mtl-key + .mtl-key { break-before: page; page-break-before: always; }
  .mtl-print-root .mtl-edit { display: none !important; }
  .mtl-print-root .mtl-exp { color: #333; }
  @page { margin: .6in; }
}