/* D1 shared course-front frame. Colors are supplied by course.css theme tokens. */
.front-title,
.front-main > section,
.endnote {
  width: min(100%, 1180px);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
  box-sizing: border-box;
}
.front-title {
  padding-top: clamp(28px, 5vw, 62px);
  padding-bottom: 24px;
}
.front-kicker,
.front-label,
.front-unit-label {
  color: var(--ink-2);
  font: 500 11px/1.5 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}
.front-kicker { display: flex; flex-wrap: wrap; gap: 4px 10px; min-width: 0; }
.front-title h1 {
  max-width: 18ch;
  margin: 16px 0 12px;
  color: var(--ink);
  font: 750 clamp(40px, 6.2vw, 84px)/.98 var(--sans);
  letter-spacing: -.035em;
  overflow-wrap: anywhere;
}
.front-deck {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-2);
  font: 400 clamp(17px, 2vw, 20px)/1.45 var(--serif);
}
.front-drawing { padding-top: 10px; padding-bottom: 24px; }
.front-sheet {
  min-width: 0;
  padding: clamp(10px, 2vw, 22px);
  border: 1.5px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--grid-major);
}
.front-sheet > :first-child { margin-top: 0; }
.front-sheet > :last-child { margin-bottom: 0; }
.front-sheet svg,
.front-sheet img,
.front-sheet canvas { display: block; max-width: 100%; height: auto; }
.front-sheet svg { overflow: visible; }
.front-sheet a { color: inherit; }
.front-art-phone { display: none; }
.front-drawing-empty {
  min-height: 70px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--ink-2);
}
.front-drawing-empty p { margin: 0; font: 14px/1.45 var(--serif); }
.front-exam {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px 24px;
  padding-top: 20px;
  padding-bottom: 38px;
}
.front-exam-content { display: flex; align-items: flex-start; flex-wrap: wrap; gap: 16px 24px; min-width: 0; }
.front-exam-content > .exam-card { width: min(100%, 520px); min-width: 0; box-sizing: border-box; }
.front-exam-card {
  width: min(100%, 520px);
  min-width: 0;
  padding: 18px 20px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--grid-major);
  box-sizing: border-box;
}
.front-exam-card > :first-child { margin-top: 0; }
.front-exam-card > :last-child { margin-bottom: 0; }
.front-exam-card :is(h2,h3) { overflow-wrap: anywhere; }
.front-review,
.front-resume,
.front-exam-card .exam-card a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
  padding-top: 10px;
  border-top: 1px solid var(--grid-major);
  color: var(--ink);
  font: 600 14px/1.4 var(--sans);
  text-decoration: none;
  overflow-wrap: anywhere;
}
.front-review:hover,
.front-resume:hover,
.front-exam-card a:hover { color: var(--conc); text-decoration: underline; text-underline-offset: 3px; }
.front-exam-card .front-resume { margin-top: 9px; color: var(--dif); }
.front-resume[hidden] { display: none; }
.front-lessons { padding-top: 20px; padding-bottom: 46px; }
.front-section-head {
  margin-bottom: 20px;
  padding-top: 12px;
  border-top: 1.5px solid var(--ink);
}
.front-section-head h2,
.front-bibliografia > h2 {
  margin: 8px 0 0;
  color: var(--ink);
  font: 750 clamp(28px, 4vw, 44px)/1.05 var(--sans);
  letter-spacing: -.025em;
}
.front-unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}
.front-unit {
  min-width: 0;
  padding: 17px 18px 12px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--grid-major);
  box-sizing: border-box;
}
.front-unit h3 {
  margin: 9px 0 5px;
  color: var(--ink);
  font: 700 clamp(18px, 2vw, 22px)/1.15 var(--sans);
  overflow-wrap: anywhere;
}
.front-unit-desc {
  display: -webkit-box;
  min-width: 0;
  margin: 0 0 12px;
  overflow: hidden;
  color: var(--ink-2);
  font: 14px/1.4 var(--serif);
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.front-unit-lessons { border-top: 1px solid var(--grid-major); }
.front-lesson-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
  padding: 9px 0;
  border-bottom: 1px solid var(--grid);
  color: var(--ink);
  font: 600 13px/1.4 var(--sans);
  text-decoration: none;
  overflow-wrap: anywhere;
}
.front-lesson-row > span:first-child { min-width: 0; }
.front-lesson-row:hover,
.front-lesson-row:focus-visible { color: var(--conc); text-decoration: underline; text-underline-offset: 3px; }
.front-lesson-row.is-complementary { color: var(--ink-2); }
.complementary-mark {
  flex: 0 0 auto;
  color: var(--muted);
  font: 500 9px/1.25 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.front-bibliografia { padding-top: 26px; padding-bottom: 44px; border-top: 1.5px solid var(--ink); }
.front-bibliografia > h2 { font-size: 25px; }
.front-bib-group { margin-top: 17px; }
.front-bib-group h3 {
  margin: 0 0 5px;
  color: var(--ink-2);
  font: 500 10px/1.4 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}
.front-bib-group ul { margin: 0; padding: 0; list-style: none; }
.front-bib-group li {
  max-width: 95ch;
  padding: 3px 0;
  color: var(--ink-2);
  font: 13px/1.42 var(--serif);
  overflow-wrap: anywhere;
}
.endnote { padding-top: 20px; padding-bottom: 56px; color: var(--ink-2); font: 11px/1.5 var(--mono); letter-spacing: .03em; }
.fontes-card .bibliografia-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--conc);
  font: 500 11px/1.4 var(--mono);
  text-decoration: none;
}
.fontes-card .bibliografia-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.front-info-fallback { position: relative; }
.front-info-fallback > summary {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--ink-2);
  color: var(--ink-2);
  cursor: pointer;
  font: italic 600 13px/1 var(--serif);
  list-style: none;
}
.front-info-fallback > summary::-webkit-details-marker { display: none; }
.front-info-fallback > summary:hover,
.front-info-fallback[open] > summary,
.front-info-fallback > summary:focus-visible { border-color: var(--conc); color: var(--conc); }
.front-info-fallback .fontes-card {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 30;
  width: min(380px, calc(100vw - 32px));
  padding: 16px 18px 12px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--grid-major);
  color: var(--ink);
  text-transform: none;
  letter-spacing: 0;
}
.front-info-fallback .fontes-card h2 { margin: 0 0 10px; font: 600 11px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.front-info-fallback .fontes-card ul { margin: 0; padding-left: 17px; font: 14px/1.45 var(--serif); }
@media (max-width: 699px) and (orientation:portrait) {
  .front-title { padding-top: 30px; padding-bottom: 18px; }
  .front-title h1 { max-width: 15ch; font-size: clamp(39px, 11vw, 56px); }
  .front-drawing { padding-top: 8px; }
  .front-sheet { padding: 10px; }
  .front-art-desktop:has(+ .front-art-phone) { display: none; }
  .front-art-phone { display: block; min-width: 0; }
  .front-art-phone svg { width: 100%; }
  .front-exam { padding-top: 17px; padding-bottom: 28px; }
  .front-exam-card { padding: 16px; }
  .front-unit-grid { grid-template-columns: minmax(0, 1fr); }
  .front-unit { padding-inline: 14px; }
  .front-lesson-row { align-items: flex-start; }
}
@media (max-width: 351px) and (orientation:portrait) {
  .front-unit-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .front-main *, .front-title *, .endnote * { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
/* one quiet line under a lesson title: what the lesson is for (carried over from the old fronts) */
.front-lesson-desc { display: block; margin-top: 3px; font: 400 13px/1.45 var(--serif, Georgia, serif); color: var(--ink-2); max-width: 60ch; }
.front-lesson-row:hover .front-lesson-desc { color: var(--ink-2); text-decoration: none; }

/* ── Class register: one instrument on every course (anatomy: specimen/register.html) ── */
.register { max-width: 980px; }
.reg-title { font: 750 26px/1.1 var(--sans); letter-spacing: -.01em; margin: 0 0 6px; }
.reg, .reg-rows { list-style: none; margin: 0; padding: 0; }
.reg-unit { margin-top: 26px; }
.reg-unit-head { display: flex; align-items: baseline; gap: 12px; padding-bottom: 6px; border-bottom: 1.5px solid var(--ink); }
.reg-unit-n { font: 500 12px/1 var(--mono); color: var(--ink-2); letter-spacing: .06em; }
.reg-unit-head h3 { margin: 0; font: 650 17px/1.25 var(--sans); }
.reg-row { position: relative; isolation: isolate; display: grid; grid-template-columns: 3rem minmax(0, 1fr) auto; gap: 0 16px; padding: 13px 4px 13px 14px; border-bottom: 1px solid var(--grid-major); color: var(--ink); text-decoration: none; --tone: var(--ink-2); --tone-wash: var(--paper-2); }
.reg-row[data-tone]::before { content: ""; position: absolute; z-index: 2; left: 0; top: 0; bottom: -1px; width: 3px; background: var(--tone); pointer-events: none; }
.reg-row::after { content: ""; position: absolute; z-index: 0; inset: 0 0 1px; background: var(--tone-wash); clip-path: inset(0); opacity: 0; transition: opacity .18s ease-out; pointer-events: none; }
.reg-row > * { position: relative; z-index: 1; }
[data-tone="conc"] { --tone: var(--conc); --tone-wash: var(--conc-wash); } [data-tone="dif"] { --tone: var(--dif); --tone-wash: var(--dif-wash); } [data-tone="mix"] { --tone: var(--mix, var(--dif)); --tone-wash: var(--mix-wash, var(--dif-wash)); }
.reg-n { font: 500 21px/1.1 var(--mono); font-variant-numeric: tabular-nums; }
.reg-body { min-width: 0; }
.reg-t { font: 620 17px/1.3 var(--sans); }
.reg-does { display: block; margin-top: 4px; max-width: 62ch; font: 400 15px/1.45 var(--serif, Georgia, serif); color: var(--ink-2); }
.reg-time { display: flex; align-items: center; gap: 6px; align-self: start; padding-top: 4px; font: 12px/1 var(--mono); color: var(--ink-2); white-space: nowrap; }
.reg-clock { width: 16px; height: 16px; flex: none; }
.reg-clock-rim { fill: none; stroke: currentColor; stroke-width: 1; }
.reg-clock-fill { fill: none; stroke: currentColor; stroke-width: 8; stroke-dasharray: var(--clock-fill) 100; opacity: 0; transition: opacity .18s ease-out; }
@keyframes reg-wash-pass { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0); } }
@keyframes reg-clock-wind { from { stroke-dasharray: 0 100; } to { stroke-dasharray: var(--clock-fill) 100; } }
.reg-parts { display: inline-flex; gap: 3px; margin-left: 9px; vertical-align: middle; }
.reg-parts i { width: 11px; height: 3px; background: var(--grid-major); }
.reg-parts i.on { background: var(--ink); }
.reg-row.is-complementary .reg-n { color: transparent; -webkit-text-stroke: .8px var(--ink-2); }
.reg-row.is-complementary .reg-t { font-weight: 480; color: var(--ink-2); }
.reg-n-none::before { content: "·"; color: var(--ink-2); -webkit-text-stroke: 0; }
.reg-n { transition: color .18s ease-out, -webkit-text-stroke-color .18s ease-out; }
.reg-row:focus-visible::after { animation: reg-wash-pass .18s ease-out forwards; opacity: 1; }
.reg-row:focus-visible .reg-n { color: var(--tone); }
.reg-row:focus-visible .reg-clock-fill { animation: reg-clock-wind .18s ease-out forwards; opacity: .5; }
.reg-row.is-complementary:focus-visible::after { background: transparent; outline: 1px dashed var(--tone); outline-offset: -2px; }
.reg-row.is-complementary:focus-visible .reg-n { color: transparent; -webkit-text-stroke-color: var(--tone); }
.reg-row:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
@media (hover: hover) {
  .reg-row[href]:hover::after { animation: reg-wash-pass .18s ease-out forwards; opacity: 1; }
  .reg-row[href]:hover .reg-n { color: var(--tone); }
  .reg-row[href]:hover .reg-clock-fill { animation: reg-clock-wind .18s ease-out forwards; opacity: .5; }
  .reg-row.is-complementary[href]:hover::after { background: transparent; outline: 1px dashed var(--tone); outline-offset: -2px; }
  .reg-row.is-complementary[href]:hover .reg-n { color: transparent; -webkit-text-stroke-color: var(--tone); }
  .reg-rows:has(.reg-row[href]:hover) .reg-row[href]:not(:hover)::after { opacity: 0; transition: none; animation: none; clip-path: inset(0); }
  .reg-rows:has(.reg-row[href]:hover) .reg-row[href]:not(:hover) .reg-clock-fill { opacity: 0; transition: none; }
}
@media (hover: hover) and (prefers-reduced-motion: reduce) {
  .reg-row[href]:hover::after { animation: none; clip-path: inset(0); opacity: 1; transition: none; }
  .reg-row[href]:hover .reg-n { transition: none; }
  .reg-row[href]:hover .reg-clock-fill { animation: none; stroke-dasharray: var(--clock-fill) 100; opacity: .5; }
}
@media (prefers-reduced-motion: reduce) {
  .reg-row:focus-visible::after { animation: none; clip-path: inset(0); opacity: 1; transition: none; }
  .reg-row:focus-visible .reg-n { transition: none; }
  .reg-row:focus-visible .reg-clock-fill { animation: none; stroke-dasharray: var(--clock-fill) 100; opacity: .5; }
}
.reg-fold { position: relative; display: flex; align-items: center; height: 34px; }
.reg-fold::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1.5px dashed var(--tone); }
.reg-fold-tag { position: relative; margin-left: 12px; padding: 0 8px; background: var(--paper); font: 650 12px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--tone); }
.reg-fold-date { font-weight: 400; margin-left: 6px; }
@media (max-width: 600px) and (orientation:portrait) {
  .reg-row { grid-template-columns: 2.3rem minmax(0, 1fr); gap: 0 10px; padding-left: 12px; }
  .reg-n { font-size: 17px; }
  .reg-time { grid-column: 2; padding-top: 8px; }
}
@media print { .reg-row[data-tone]::before { print-color-adjust: exact; -webkit-print-color-adjust: exact; } }
.reg-unit.is-solo { margin-top: 0; border-top: 1.5px solid var(--ink); }
.reg-unit.is-solo + .reg-unit.is-solo { margin-top: 0; }
.reg-unit:not(.is-solo) + .reg-unit.is-solo, .reg-unit.is-solo + .reg-unit:not(.is-solo) { margin-top: 26px; }

/* Frozen interaction states used only by specimen/register.html. */
.reg-states { margin: 0 0 36px; }
.reg-states-title { margin: 0 0 12px; font: 700 21px/1.2 var(--sans); }
.reg-state-list { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 24px; margin: 0; padding: 0; }
.reg-state-item { min-width: 0; }
.reg-state-sample { min-width: 0; }
.reg-state-sample.is-dark { --paper: #14171d; --paper-2: #1e2229; --ink: #e5e3da; --ink-2: #a3a6a6; --grid-major: #252a32; --conc: #dd8b6b; --conc-wash: #372824; padding-inline: 12px; background: var(--paper); color: var(--ink); }
.reg-row.is-demo-active::after { clip-path: inset(0); opacity: 1; }
.reg-row.is-demo-active .reg-n { color: var(--tone); }
.reg-row.is-demo-active .reg-clock-fill { stroke-dasharray: var(--clock-fill) 100; opacity: .5; }
.reg-row.is-demo-active.is-complementary::after { background: transparent; outline: 1px dashed var(--tone); outline-offset: -2px; }
.reg-row.is-demo-active.is-complementary .reg-n { color: transparent; -webkit-text-stroke-color: var(--tone); }
.reg-row.is-demo-focus { outline: 2px solid var(--ink); outline-offset: 2px; }
.reg-state-note { margin: 5px 0 0 14px; color: var(--ink-2); font: 400 13px/1.4 var(--serif, Georgia, serif); }
.reg-state-note strong { font: 500 11px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
@media (max-width: 600px) and (orientation:portrait) { .reg-state-list { grid-template-columns: minmax(0, 1fr); } }