.course-cover {
  position: relative;
  min-height: 570px;
  padding: clamp(36px, 7vw, 82px);
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, transparent 0 61%, rgba(255,255,255,.035) 61% 62%, transparent 62%),
    linear-gradient(45deg, #0b0b0b, #222 72%);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(240px, .65fr);
  align-items: center;
}
.course-cover::before {
  position: absolute;
  top: -130px;
  right: 16%;
  width: 360px;
  height: 680px;
  border: 1px solid rgba(255,255,255,.06);
  content: "";
  transform: rotate(34deg);
  pointer-events: none;
}
.course-cover > * { position: relative; z-index: 1; }
.course-cover h1 { max-width: 780px; }
.course-description { max-width: 720px; margin: 24px 0 34px; color: #c1bebe; font-size: 1.08rem; }
.cover-mark {
  width: 280px;
  height: 280px;
  border: 1px solid var(--accent);
  color: var(--ink);
  background: rgba(13,13,13,.72);
  box-shadow: 24px 24px 0 rgba(96,33,39,.32);
  display: grid;
  place-items: center;
  transform: rotate(-6deg);
}
.cover-mark span { padding: 24px; font: 400 clamp(1.3rem, 3vw, 2.3rem)/1 var(--display); text-align: center; overflow-wrap: anywhere; }
.ghost-dark { --button-ink: var(--ink) !important; }

.intro-grid { display: grid; grid-template-columns: 1fr 1fr; padding: 80px 34px; align-items: start; gap: 70px; }
.intro-grid h2 { margin: .2em 0; font-size: clamp(2rem, 4vw, 3.25rem); }
.intro-grid > p { padding-top: 30px; color: var(--muted); font-size: 1.08rem; }
.assignment-switcher { margin-bottom: 1px; border: 1px solid var(--line); background: var(--line); display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1px; }
.assignment-switch { --hover-lightness: 40%; position: relative; z-index: 0; min-height: 74px; padding: 15px 18px; overflow: visible; background: transparent; color: var(--ink); display: grid; align-content: center; gap: 2px; isolation: isolate; }
.assignment-switch::before { position: absolute; z-index: -1; inset: 0; border: 1px solid transparent; background: var(--surface); content: ""; transform: rotate(0); transition: transform .14s cubic-bezier(.2,.8,.2,1), background-color .12s ease, border-color .12s ease; }
.assignment-switch > .random-hover-content { display: grid; align-content: center; gap: 2px; }
.assignment-switch > .random-hover-content > span { color: var(--accent-soft); font-size: .62rem; font-weight: 800; letter-spacing: .13em; }
.assignment-switch > .random-hover-content > strong { font: 400 1rem/1.25 var(--display); }
.assignment-switch:hover, .assignment-switch:focus-visible { color: #fff; }
.assignment-switch:hover::before, .assignment-switch:focus-visible::before { border-color: hsl(var(--random-hue, 354) 60% var(--hover-lightness)); background: hsl(var(--random-hue, 354) 60% var(--hover-lightness)); transform: rotate(var(--random-angle, 3deg)); }
.assignment-switch.active::before { border-color: var(--accent); background: var(--accent-deep); box-shadow: inset 0 -3px 0 var(--accent); }
.assignment-switch.active:hover::before, .assignment-switch.active:focus-visible::before { border-color: hsl(var(--random-hue, 354) 60% var(--hover-lightness)); background: hsl(var(--random-hue, 354) 60% var(--hover-lightness)); }

.archive-meta {
  margin-bottom: 1px;
  padding: 30px 34px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--surface-strong);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 42px;
}
.archive-meta h2 { margin: .4em 0; }
.archive-meta p, .archive-meta small { color: #aaa7a7; }
.archive-meta > div:last-child { min-width: 195px; display: grid; gap: 3px; }
.archive-meta > div:last-child small:not(:first-child) { margin-top: 11px; }

.work-roster { overflow: hidden; border: 1px solid var(--line); background: var(--surface); box-shadow: var(--shadow); }
.work-row { min-height: 102px; padding: 14px 21px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: minmax(190px,.9fr) 180px minmax(220px,1.5fr) 90px; align-items: center; gap: 22px; }
.work-row:last-child { border-bottom: 0; }
.work-row:not(.work-head):hover { background: #2a292a; }
.work-head { min-height: auto; background: #0d0d0d; color: var(--muted); font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.work-thumb { width: 160px; aspect-ratio: 16/9; border: 1px solid var(--line); border-radius: 0; object-fit: cover; filter: saturate(.7); transition: filter .18s ease; }
.work-row:hover .work-thumb { filter: saturate(1); }
.student-cell { width: fit-content; display: flex; align-items: center; gap: 12px; }
.student-cell > .random-hover-content { display: flex; align-items: center; gap: 12px; }
.student-cell .random-hover-content > img { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; object-fit: cover; filter: grayscale(1); transition: filter .15s ease, border-color .15s ease; }
.student-cell:hover .random-hover-content > img, .student-cell:focus-visible .random-hover-content > img { border-color: currentColor; filter: grayscale(0); }
.student-cell b, .student-cell small { display: block; }
.work-title { font: 400 1.15rem var(--display); }
.work-row.missing { opacity: .5; }

.emoji-status { position: relative; font-size: 1.35rem; line-height: 1; cursor: help; outline: none; display: inline-grid; place-items: center; }
.emoji-status::after {
  position: absolute;
  z-index: 30;
  bottom: calc(100% + 11px);
  left: 50%;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  background: #090909;
  box-shadow: var(--shadow);
  color: #fff;
  content: attr(data-tooltip);
  font: 700 .68rem/1.25 var(--sans);
  letter-spacing: .04em;
  opacity: 0;
  visibility: hidden;
  white-space: nowrap;
  pointer-events: none;
  transform: translate(-50%, 4px);
  transition: opacity .14s ease, transform .14s ease;
}
.emoji-status::before { position: absolute; z-index: 30; bottom: calc(100% + 5px); left: 50%; border: 6px solid transparent; border-top-color: var(--line-strong); content: ""; opacity: 0; visibility: hidden; pointer-events: none; transform: translateX(-50%); }
.emoji-status:hover, .emoji-status:focus-visible { z-index: 31; }
.emoji-status:hover::after, .emoji-status:focus-visible::after { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.emoji-status:hover::before, .emoji-status:focus-visible::before { opacity: 1; visibility: visible; }

.submit-editor { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, .7fr); align-items: start; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.submit-editor > .panel { border: 0; box-shadow: none; }
.screenshot-preview { width: 100%; aspect-ratio: 16/9; border: 1px solid var(--line); border-radius: 0; background: #0b0b0b; object-fit: cover; }

.public-work { margin-bottom: 1px; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); align-items: center; gap: 1px; border: 1px solid var(--line); background: var(--line); box-shadow: var(--shadow); }
.work-hero-image { width: 100%; max-height: 680px; aspect-ratio: 16/10; border: 0; background: #0c0c0c; object-fit: contain; filter: saturate(.78); }
.public-work-copy { height: 100%; padding: clamp(30px, 5vw, 58px); background: var(--surface-strong); display: flex; align-items: flex-start; flex-direction: column; justify-content: center; }
.public-work-copy h1 { font-size: clamp(2.2rem, 4vw, 4.2rem); }
.work-author { margin-bottom: 14px; color: var(--ink); display: flex; align-items: center; gap: 12px; }
.work-author > .random-hover-content { display: flex; align-items: center; gap: 12px; }
.work-author img { width: 48px; height: 48px; border: 1px solid var(--line); border-radius: 50%; object-fit: cover; filter: grayscale(1); transition: filter .15s ease, border-color .15s ease; }
.work-author span, .work-author strong, .work-author small { display: block; }
.work-author small { color: var(--accent-soft); font-size: .65rem; letter-spacing: .08em; }
.work-author:hover img, .work-author:focus-visible img { border-color: currentColor; filter: grayscale(0); }
.login-callout { margin-top: 34px; padding: 25px 28px; border: 1px solid var(--accent-deep); background: #211719; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.submission-table td:last-child { min-width: 120px; }
.submission-title-link { color: var(--accent-soft); font-family: var(--display); font-size: 1.05rem; }
.text-link { color: var(--accent-soft); text-decoration: underline; text-decoration-color: var(--accent-deep); text-underline-offset: 3px; }

.markdown-editor { display: grid; gap: 11px; }
.markdown-preview-wrap { margin-top: 5px; padding-top: 18px; border-top: 1px solid var(--line); }
.markdown-preview-wrap > small { color: var(--accent-soft); font-size: .65rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.markdown-preview { min-height: 140px; margin-top: 9px; padding: 22px; border: 1px dashed var(--line-strong); background: #151515; }
.work-page-section { width: 100%; margin: 0 0 1px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.work-reading-width { width: min(900px, 100%); margin: 0 auto; padding: clamp(30px, 6vw, 64px); }
.work-description { max-width: none; padding: 0; border-top: 3px solid var(--accent); background: var(--light-panel); color: var(--light-ink); }
.work-description h2, .work-feedback h2, .work-review-editor h2 { margin: .3em 0 1.25em; }
.work-feedback { background: var(--surface-strong); }
.work-feedback .work-reading-width { width: min(960px, 100%); }
.work-feedback .comment-list { box-shadow: none; }
.work-feedback .comment { padding: 24px 26px; background: var(--surface); display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: start; gap: 38px; }
.work-feedback .comment:nth-child(even) { background: #262526; }
.work-feedback .comment-copy { margin: 0; font-size: 1rem; line-height: 1.75; }
.comment-author { min-width: 190px; color: var(--ink); display: flex; align-items: center; justify-content: flex-end; gap: 13px; text-align: right; }
.comment-author > .random-hover-content { display: flex; align-items: center; justify-content: flex-end; gap: 13px; }
.comment-author span { display: block; }
.comment-author strong, .comment-author small { display: block; }
.comment-author img { width: 52px; height: 52px; border: 1px solid var(--line); border-radius: 50%; object-fit: cover; filter: grayscale(1); transition: filter .15s ease, border-color .15s ease; }
.comment-author:hover img, .comment-author:focus-visible img { border-color: currentColor; filter: grayscale(0); }
.empty-feedback { margin: 0; padding: 30px; background: var(--surface); text-align: center; }
.work-review-editor { border-top-color: var(--accent-deep); background: var(--surface); }
.work-review-editor .work-reading-width { width: min(900px, 100%); }
.work-review-editor .review-form { max-width: 760px; }
.work-review-editor .login-callout { margin: 0 auto; border: 0; background: transparent; }
.markdown-body { font-size: 1.04rem; line-height: 1.85; overflow-wrap: anywhere; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body > :last-child { margin-bottom: 0; }
.markdown-body h1 { font-size: 2rem; }
.markdown-body h2 { font-size: 1.55rem; }
.markdown-body h3 { font-size: 1.3rem; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { margin: 1.5em 0 .55em; letter-spacing: -.02em; line-height: 1.3; }
.markdown-body p, .markdown-body ul, .markdown-body ol, .markdown-body blockquote, .markdown-body pre { margin: 1em 0; }
.markdown-body blockquote { margin-left: 0; padding: 3px 0 3px 20px; border-left: 3px solid var(--accent); color: #5c5556; }
.markdown-body code { font-size: .92em; }
.markdown-body pre { overflow: auto; padding: 18px; background: #111; color: #f5f3f3; }
.markdown-body pre code { padding: 0; background: transparent; color: inherit; }
.markdown-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.markdown-body table { font-size: .93rem; }
.markdown-body th, .markdown-body td { padding: 9px 12px; }
.work-description .markdown-body th { background: #ddd9d7; color: #4d4949; }
.work-description .markdown-body td { border-color: #d4cfcc; }

.score-summary { display: grid; grid-template-columns: minmax(220px, .65fr) minmax(0, 1.35fr); align-items: end; gap: 38px; }
.score-summary h2 { margin: .2em 0; }
.score-summary .distribution { overflow-x: auto; padding-top: 16px; justify-content: flex-end; }
.score-locked { padding: 17px 20px; border: 1px dashed var(--accent-deep); background: #211719; color: #c5b5b7; display: flex; align-items: center; gap: 12px; }
.score-locked p { margin: 0; }
.review-task-table td:nth-child(3) { min-width: 170px; }
.review-task-table .emoji-status + small { margin-top: 3px; }

.course-admin-nav { margin: -25px 0 44px; overflow: hidden; border: 1px solid var(--line); background: var(--surface-strong); box-shadow: var(--shadow); display: flex; align-items: stretch; justify-content: space-between; }
.course-admin-title { min-width: 225px; padding: 16px 21px; border-left: 4px solid var(--accent); background: #090909; display: flex; flex-direction: column; justify-content: center; }
.course-admin-title strong { font: 400 1.05rem var(--display); }
.course-admin-title small { color: var(--accent-soft); font-size: .62rem; letter-spacing: .09em; text-transform: uppercase; }
.course-admin-nav nav { overflow-x: auto; display: flex; align-items: stretch; }
.course-admin-nav nav a { position: relative; padding: 19px 18px; color: var(--muted); font-size: .74rem; font-weight: 700; white-space: nowrap; display: flex; align-items: center; }
.course-admin-nav nav a::after { position: absolute; right: 18px; bottom: 0; left: 18px; height: 2px; background: currentColor; content: ""; transform: scaleX(0); transition: transform .15s ease; }
.course-admin-nav nav a:hover, .course-admin-nav nav a.active { background: #222; color: var(--accent-soft); }
.course-admin-nav nav a:hover::after, .course-admin-nav nav a.active::after { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  .assignment-switch:hover::before, .assignment-switch:focus-visible::before { transform: none; }
}

@media (max-width: 760px) {
  .course-cover { min-height: auto; grid-template-columns: 1fr; }
  .cover-mark { width: 190px; height: 190px; margin: 45px auto 0; }
  .intro-grid, .submit-editor, .public-work, .score-summary { grid-template-columns: 1fr; }
  .intro-grid { padding: 60px 12px; gap: 20px; }
  .score-summary .distribution { justify-content: flex-start; }
  .course-admin-nav { margin-top: -12px; display: block; }
  .course-admin-title { min-width: 0; }
  .course-admin-nav nav { width: 100%; }
  .assignment-switcher { grid-template-columns: 1fr 1fr; }
  .archive-meta { grid-template-columns: 1fr; }
  .work-roster { overflow-x: auto; }
  .work-row { min-width: 720px; }
  .login-callout { align-items: flex-start; flex-direction: column; }
  .work-feedback .comment { grid-template-columns: 1fr; gap: 22px; }
  .comment-author { justify-self: end; }
}

@media (max-width: 480px) {
  .assignment-switcher { grid-template-columns: 1fr; }
}