/* The archive supplies an artistic language, not a timetable or product structure. */
:root { --heading: #34324d; --binding: #c6ab70; --sidebar: 236px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
h1, h2, h3 { color: var(--heading); font-weight: 550; overflow-wrap: anywhere; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
button, input, select, textarea { font-weight: 400; }
.button { font-weight: 550; }
.app-body, .public-body { background-color: var(--surround); background-image: radial-gradient(ellipse at 6% 12%, #ffe5ab35, transparent 30rem), radial-gradient(ellipse at 100% 100%, #cbb5dd25, transparent 48rem); background-attachment: fixed; }
.app-main { margin-top: 18px; padding-inline: 48px; padding-bottom: 30px; border-color: #cebeac; border-radius: 12px 12px 5px 5px; background: var(--surface); box-shadow: 0 3px 0 -1px #fbf3e5, 0 4px 0 #c5b9a9, 0 7px 0 -1px #f6ead8, 0 8px 0 #bbac9d, 0 18px 44px #59416f14, 0 0 40px #edbe740d; }
.app-main::before { inset: 11px; width: auto; border: 1px solid #d8c59d; border-radius: 3px; }
.app-main > :not(.paper-corner):not(dialog) { position: relative; }
.illustration-picture { display: contents; }
.illustration-picture > source { display: none; }
.paper-corner { position: absolute; top: -1px; width: 138px; height: 138px; background: url("../images/floral-corner-138.a6cac25af111.webp") center / contain no-repeat; background-image: image-set(url("../images/floral-corner-138.a6cac25af111.webp") 1x, url("../images/floral-corner-276.a7db3bec1f7c.webp") 2x); pointer-events: none; border-radius: 12px; }
.paper-corner-start { left: -1px; }
.paper-corner-end { right: -1px; transform: scaleX(-1); }
.running-head { min-height: 84px; margin-bottom: 28px; gap: 20px; border-bottom: 1px solid var(--binding); }
.masthead-brand { font: 550 1.375rem 'Literata', Georgia, serif; color: var(--heading); text-decoration: none; }
.masthead-caption { color: var(--muted); font-size: .8125rem; }
.masthead-season { font-size: .8125rem; color: var(--primary); }
.sidebar { inset-block: 24px; padding: 8px 16px 0 22px; }
.sidebar::after { right: -2px; width: 6px; border-color: #b8a8c1; background: linear-gradient(#ded3e9, #cdbfd8, #ded3e9); }
.brand { padding-inline: 6px; }
.brand a { color: var(--heading); font-weight: 550; font-size: 1.25rem; }
.brand-kicker { font-size: .6875rem; gap: 8px; }
.brand-kicker img { width: 25px; }
.brand-caption { font-size: .75rem; }
.season-label { display: flex; justify-content: space-between; gap: 12px; font-size: .6875rem; border-top-color: var(--line); }
.season-label > span { font-size: .6875rem; }
.main-nav { padding-right: 14px; }
.main-nav a { font-size: .875rem; padding-left: 9px; gap: 9px; }
.main-nav a:hover { color: var(--heading); background-color: var(--primary-soft); }
.main-nav a.active { background-color: #993e53; background-image: repeating-linear-gradient(0deg, #ffffff05 0, #ffffff05 1px, transparent 1px, transparent 3px); box-shadow: inset 0 2px 0 #bd778660, inset 0 -2px 0 #6c273d30, 0 3px 5px #7c304318; color: #fff; }
.main-nav a.active::after { right: -13px; width: 14px; clip-path: polygon(0 0,100% 0,42% 50%,100% 100%,0 100%); }

.nav-divider { font-size: .6875rem; padding-top: 8px; margin-top: 10px; border-top: 1px solid var(--line); }
.sidebar-footer { border-top-color: var(--line); font-size: .8125rem; }
.sidebar-footer strong { font-weight: 500; }
.page-colophon { margin-top: 36px; padding-top: 16px; border-top: 1px solid #d8c59d; font-size: .6875rem; }
.page-colophon::after { content: ''; position: absolute; width: 100px; height: 24px; left: calc(50% - 50px); top: 12px; background: url("../images/floral-rule.b743a0f1f262.svg") center / contain no-repeat; }
.mobile-location, .nav-backdrop { display: none; }
.page-header { padding-bottom: 22px; margin-bottom: 24px; }
.page-header .eyebrow { margin-bottom: 8px; }
.page-header .lead { font-size: .9375rem; }
.page-header h1 { margin-bottom: 8px; }

/* The home page is a continuous book spread; marginalia do not compete with lessons. */
.notebook-welcome { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 28px; }
.notebook-welcome h1 { font-size: 1.75rem; margin: 0; }
.notebook-welcome .eyebrow { font-size: .75rem; margin-bottom: 8px; }
.welcome-profile-link { display: inline-block; margin-top: 8px; font-size: .8125rem; }
.notebook-welcome > .button { flex-shrink: 0; font-size: .8125rem; }
.home-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: -4px 0 30px; }
.home-action { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-width: 0; padding: 16px 18px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--heading); text-decoration: none; }
.home-action strong, .home-action small { display: block; }
.home-action strong { font-size: .9375rem; font-weight: 550; }
.home-action small { margin-top: 5px; color: var(--muted); font-size: .75rem; line-height: 1.5; }
.home-action:hover { border-color: var(--primary); background: var(--primary-soft); }
.home-action-primary { color: #fff; background: var(--primary); border-color: var(--primary); }
.home-action-primary small { color: #f0eaf5; }
.home-action-primary:hover { color: #fff; background: var(--primary-hover); }
.home-empty { grid-column: 1 / -1; padding: 12px 0 24px; }
.home-empty h3 { margin: 0 0 8px; font-size: 1.125rem; }
.home-empty p { max-width: 55ch; color: var(--muted); font-size: .9375rem; }
.home-empty a { display: inline-flex; align-items: center; min-height: 44px; }
.home-bookshelf .bookshelf-featured { grid-column: 1 / -1; padding-bottom: 20px; border-bottom: 1px solid var(--line); align-items: center; }
.home-bookshelf .bookshelf-featured .bookshelf-copy > strong { font-size: 1.375rem; }
.home-bookshelf .bookshelf-featured .bookshelf-copy > span { font-size: .875rem; }
.home-bookshelf .bookshelf-item:not(.bookshelf-featured) .sheet-cover { width: 48px; height: 70px; padding: 6px 3px 6px 5px; }
.home-bookshelf .bookshelf-item:not(.bookshelf-featured) .cover-drawing { width: 28px; height: 26px; }
.home-bookshelf .bookshelf-item:not(.bookshelf-featured) .cover-title { display: none; }
.home-bookshelf .bookshelf-item:not(.bookshelf-featured) .cover-imprint { font-size: .4375rem; }
.home-bookshelf .bookshelf-item { gap: 18px; }
.home-spread { display: grid; grid-template-columns: minmax(0, 1fr) 192px; gap: 40px; }
.home-main-column { min-width: 0; }
.home-margin { min-width: 0; align-self: start; padding-top: 6px; }
.margin-portal { display: block; width: 170px; height: 270px; object-fit: contain; margin: -6px auto 20px; pointer-events: none; }
.margin-teapot { display: block; width: 192px; height: 156px; object-fit: contain; margin: 0 auto 20px; pointer-events: none; }
.margin-note { padding-left: 16px; border-left: 1px solid var(--binding); }
.margin-note .eyebrow { font-size: .75rem; }
.margin-note p { color: var(--muted); font-size: .8125rem; line-height: 1.65; margin: 12px 0; }
.margin-note a, .margin-contact { font-size: .75rem; line-height: 1.6; }
.margin-metric { display: flex; align-items: baseline; gap: 9px; }
.margin-metric strong { font: 500 2.25rem/1 'Literata', Georgia, serif; color: var(--primary); }
.margin-metric span { font-size: .75rem; color: var(--muted); }
.margin-contact { display: block; margin: 22px 0 0 16px; }
.home-materials { padding-top: 20px; border-top: 2px solid var(--primary); }
.chapter-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.chapter-heading h2 { font-size: 1.375rem; margin: 0; }
.chapter-heading-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; }
.chapter-heading-links a { color: var(--link); font-size: .8125rem; white-space: nowrap; }
.bookshelf { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 26px; row-gap: 28px; }
.bookshelf-item { display: flex; align-items: flex-start; gap: 18px; min-width: 0; color: var(--text); text-decoration: none; }
.bookshelf-item:hover .bookshelf-copy > strong, .bookshelf-item:hover .book-open { color: var(--link); text-decoration: underline; text-underline-offset: 4px; }
.bookshelf-copy { display: flex; flex-direction: column; min-width: 0; gap: 7px; padding: 3px 0; }
.bookshelf-copy > strong { font: 550 1rem/1.45 'Literata', Georgia, serif; color: var(--heading); overflow-wrap: anywhere; }
.bookshelf-copy > span { font-size: .75rem; }
.bookshelf-copy > small { font-size: .6875rem; color: var(--muted); }
.bookshelf-copy .book-open { font-size: .75rem; color: var(--link); margin-top: 5px; }
.sheet-cover { --cover-color: #315f79; position: relative; width: 84px; height: 124px; flex-shrink: 0; display: flex; align-items: center; flex-direction: column; padding: 10px 9px 11px 13px; color: #fff; background-color: var(--cover-color); background-image: repeating-linear-gradient(94deg, #ffffff05 0, #ffffff05 1px, transparent 1px, transparent 3px); border-radius: 2px 5px 5px 2px; border: 1px solid #34313b30; border-left: 6px solid #203e59; box-shadow: inset 2px 0 3px #ffffff25, 2px 1px 0 #f4f0e1, 3px 2px 0 #c9cbbd, 5px 4px 7px #34313b17; }
.sheet-cover::after { content: ''; position: absolute; inset: 5px 4px 5px 5px; border: 1px solid #ead8a966; border-radius: 1px; pointer-events: none; }
.cover-imprint { font: 400 .5625rem 'Golos', sans-serif; color: #fff; }
.cover-drawing { width: 56px; height: 51px; background: url("../images/cover-geometry.702a59c9d510.svg") center / contain no-repeat; flex-shrink: 0; margin: 1px 0; }
.cover-title { text-align: center; font: 500 .6875rem/1.4 'Literata', Georgia, serif; overflow-wrap: anywhere; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; max-height: 2.8em; }
.cover-rule { width: 22px; height: 1px; background: #ead8a9; margin-top: auto; }
.cover-1, .cover-4 { --cover-color: #65517b; border-left-color: #49365d; }
.cover-2, .cover-5 { --cover-color: #8a4359; border-left-color: #67283d; }
.cover-3 { --cover-color: #526782; border-left-color: #364d69; }
.home-news { margin-top: 34px; padding-top: 24px; border-top: 1px solid #d8c59d; }
.editorial-news { display: grid; grid-template-columns: 110px minmax(0,1fr) 24px; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); color: var(--text); text-decoration: none; }
.editorial-news:first-child { padding-top: 0; }
.editorial-news-date { font-size: .75rem; color: var(--muted); padding-top: 4px; }
.pinned-label { display: block; color: var(--berry); font-size: .6875rem; margin-top: 6px; }
.editorial-news strong { display: block; font: 550 1.125rem/1.5 'Literata', Georgia, serif; color: var(--heading); margin-bottom: 6px; }
.editorial-news .news-excerpt { display: block; max-width: 80ch; font-size: .875rem; }
.editorial-news:hover strong { text-decoration: underline; text-underline-offset: 4px; color: var(--link); }
.editorial-arrow { color: var(--link); padding-top: 4px; }

/* Lessons and worksheets read as chapters and printed sheets, not a calendar. */
.student-home-spread { display: grid; grid-template-columns: minmax(0, 1fr) 216px; gap: 36px; margin-bottom: 30px; }
.student-current { min-width: 0; border-top: 3px solid var(--berry); padding-top: 18px; }
.student-current .chapter-heading h2, .student-previous .chapter-heading h2 { font: 500 .875rem 'Golos', sans-serif; color: var(--muted); }
.student-current .chapter-heading a, .student-previous .chapter-heading a { display: inline-flex; align-items: center; min-height: 44px; font-size: .8125rem; white-space: nowrap; }
.student-current .chapter-heading { margin-bottom: 14px; }
.student-current-book { display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: 26px; padding: 8px 0 20px; }
.student-current-book > .sheet-cover { width: 100px; height: 148px; transform: rotate(-3deg); margin-top: 8px; }
.student-current-book .cover-drawing { width: 68px; height: 65px; }
.student-current-copy { min-width: 0; }
.student-current-copy .eyebrow { margin-bottom: 8px; font-size: .75rem; }
.student-current h3 { margin: 0 0 8px; font-size: 1.625rem; line-height: 1.4; }
.student-current h3 a { color: var(--heading); text-decoration: none; }
.student-current h3 a:hover { color: var(--link); text-decoration: underline; }
.student-sheet-title { margin: 0 0 16px; color: var(--muted); font-size: .9375rem; }
.student-sheet-score { margin: 14px 0 9px; color: var(--muted); font-size: .8125rem; }
.student-sheet-score strong { color: var(--heading); font-size: 1rem; }
.student-meter { display: block; width: 100%; max-width: 360px; height: 6px; border: 0; border-radius: 3px; background: var(--field-deep); accent-color: var(--success); overflow: hidden; }
.student-meter::-webkit-progress-bar { background: var(--field-deep); }
.student-meter::-webkit-progress-value { background: var(--success); }
.student-meter::-moz-progress-bar { background: var(--success); }
.student-current-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 20px; margin-top: 20px; }
.student-current-actions a { display: inline-flex; align-items: center; min-height: 44px; gap: 16px; font-size: .875rem; }
.student-home-margin { padding-left: 22px; border-left: 1px solid var(--binding); }
.student-home-margin > picture > img { display: block; object-fit: contain; width: 120px; height: 190px; margin: -12px auto 4px; }
.student-summary-link { display: block; color: var(--heading); text-decoration: none; padding: 10px 0 16px; }
.student-summary-link > span:first-child { display: flex; justify-content: space-between; gap: 8px; font-size: .875rem; }
.student-summary-link > strong { display: block; margin: 6px 0 3px; font: 550 2.25rem/1.3 'Literata', Georgia, serif; }
.student-summary-link small { color: var(--muted); font: 400 .875rem 'Golos', sans-serif; }
.student-summary-caption { color: var(--muted); font-size: .75rem; }
.student-summary-link:hover > span:first-child { color: var(--link); text-decoration: underline; }
.student-attendance-link { display: flex; align-items: center; gap: 10px; min-height: 48px; padding-block: 10px; border-top: 1px solid var(--line); font-size: .8125rem; text-decoration: none; }
.student-attendance-link > span:last-child { margin-left: auto; }
.student-attendance-link:hover { text-decoration: underline; }
.student-previous { border-top: 1px solid var(--binding); padding-top: 14px; }
.student-previous .chapter-heading { margin-bottom: 4px; }
.student-previous-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.student-previous-item { display: flex; align-items: flex-start; gap: 14px; min-width: 0; padding: 14px 0; text-decoration: none; color: var(--heading); }
.student-previous-item .sheet-cover { width: 44px; height: 66px; padding: 6px 3px 6px 5px; }
.student-previous-item .cover-drawing { width: 26px; height: 27px; }
.student-previous-item .cover-imprint { font-size: .375rem; }
.student-previous-item .cover-title { display: none; }
.student-previous-copy { display: flex; flex-direction: column; min-width: 0; gap: 6px; }
.student-previous-copy small { font-size: .6875rem; color: var(--muted); }
.student-previous-copy strong { font: 550 1rem/1.45 'Literata', Georgia, serif; overflow-wrap: anywhere; }
.student-previous-copy > span { font-size: .75rem; color: var(--muted); }
.student-previous-copy > .student-complete { color: var(--success); }
.student-previous-item:hover strong { text-decoration: underline; color: var(--link); }
.student-previous-arrow { display: none; }
.progress-conditions-note { margin: 12px 0 0; color: var(--muted); font-size: .875rem; }
.progress-conditions-note a { display: inline-flex; align-items: center; min-height: 44px; }
@media (max-width: 1199px) {
  .student-home-spread { grid-template-columns: minmax(0, 1fr) 180px; gap: 24px; }
  .student-current-book { grid-template-columns: 72px minmax(0, 1fr); gap: 20px; }
  .student-current-book > .sheet-cover { width: 72px; height: 110px; }
  .student-current-book .cover-drawing { width: 42px; height: 42px; }
  .student-previous-list { gap: 16px; }
  .student-previous-item { gap: 10px; }
}
@media (max-width: 767px) {
  .student-home-spread { grid-template-columns: minmax(0, 1fr); gap: 16px; margin-bottom: 22px; }
  .student-current { padding-top: 8px; }
  .student-current .chapter-heading { flex-direction: row; align-items: center; margin-bottom: 6px; }
  .student-current-book { grid-template-columns: minmax(0, 1fr); padding: 4px 0 10px; }
  .student-current-book > .sheet-cover, .student-home-margin > picture > img { display: none; }
  .student-current h3 { font-size: 1.5rem; }
  .student-current-copy .eyebrow { margin-bottom: 6px; }
  .student-sheet-title { font-size: .875rem; margin-bottom: 12px; }
  .student-current-actions { gap: 6px 16px; margin-top: 16px; }
  .student-current-actions .button { flex: 1 1 auto; justify-content: space-between; }
  .student-current-actions a { font-size: .8125rem; }
  .student-home-margin { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; padding: 0; border: 0; border-block: 1px solid var(--line); }
  .student-summary-link { padding: 14px 12px 14px 0; }
  .student-summary-link > strong { font-size: 1.75rem; }
  .student-summary-link > span:first-child { font-size: .8125rem; }
  .student-summary-caption { font-size: .6875rem; }
  .student-attendance-link { border-top: 0; border-left: 1px solid var(--line); padding-left: 12px; gap: 6px; flex-wrap: wrap; }
  .student-attendance-link .nav-icon { display: none; }
  .student-previous { border-top: 0; padding-top: 0; }
  .student-previous .chapter-heading { flex-direction: row; align-items: center; }
  .student-previous-list { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .student-previous-item { align-items: center; gap: 14px; border-bottom: 1px solid var(--line); }
  .student-previous-copy { flex: 1; }
  .student-previous-arrow { display: block; color: var(--link); }
}

.lesson-library-tools { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.lesson-library-tools label { min-width: 0; margin: 0; font-size: .8125rem; gap: 6px; }
.lesson-library-tools .lesson-library-search { flex: 1 1 250px; }
.lesson-library-tools input, .lesson-library-tools select { width: 100%; min-height: 44px; }
/* macOS native selects can ignore min-height and push their labels below the search label. */
.lesson-library-tools input, .lesson-library-tools select, .lesson-library-tools .button { height: 44px; line-height: 1.4; }
.lesson-library-tools select, .lesson-library-tools .button { -webkit-appearance: none; appearance: none; }
.lesson-library-tools select { padding-right: 34px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%2359416f' stroke-width='1.5'/%3E%3C/svg%3E"); background-position: right 10px center; background-size: 16px; background-repeat: no-repeat; }
.lesson-library-summary { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 20px; min-height: 44px; margin-bottom: 24px; color: var(--muted); font-size: .8125rem; }
.lesson-library-summary a { display: inline-flex; align-items: center; min-height: 44px; }
.page-lessons .sheet-links { gap: 8px; }
.page-lessons .sheet-link { padding: 9px 12px; border: 1px solid var(--line); border-radius: 4px; text-decoration: none; }
.page-lessons .sheet-link:hover { background: var(--primary-soft); border-color: var(--primary); }
.sheet-link-arrow { color: var(--primary); padding-left: 8px; }
.lesson-library { display: grid; gap: 30px; }
.lesson-chapter { display: grid; grid-template-columns: 76px minmax(0, 1fr); column-gap: 26px; padding: 0 0 28px; border-bottom: 1px solid var(--line); }
.lesson-chapter-index { padding-top: 2px; color: var(--berry); }
.lesson-chapter-index > span { display: block; font-size: .6875rem; color: var(--muted); }
.lesson-chapter-index > strong { font: 500 1.875rem/1.4 'Literata', Georgia, serif; }
.lesson-chapter-index > small { display: block; font-size: .6875rem; color: var(--muted); }
.lesson-chapter h2 { font-size: 1.375rem; margin: 0 0 10px; }
.lesson-chapter h2 a { color: var(--heading); text-decoration: none; }
.lesson-chapter h2 a:hover { color: var(--link); text-decoration: underline; }
.lesson-chapter p { color: var(--muted); font-size: .9375rem; }
.lesson-chapter .card-meta { justify-content: flex-start; margin-bottom: 10px; }
.sheet-links { display: flex; flex-wrap: wrap; gap: 12px 20px; }
.sheet-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: .8125rem; }
.sheet-link::before { content: ''; width: 14px; height: 18px; flex-shrink: 0; border: 1px solid #443054; border-left: 4px solid #34243f; border-radius: 1px 3px 3px 1px; background: var(--primary); box-shadow: inset 2px 0 0 #a68ab7, 2px 2px 0 var(--field-deep); }
.sheet-link small { color: var(--muted); font-size: .75rem; }
.worksheet-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
.worksheet-document { scroll-margin-top: 28px; padding: 26px 28px; border: 1px solid var(--line); border-left: 5px solid var(--primary); border-radius: 3px 6px 6px 3px; box-shadow: 3px 3px 0 #f7f2ec, 4px 4px 0 var(--line); }
.worksheet-document:target { border-color: var(--link); outline: 2px solid #285a8b25; outline-offset: 3px; }
.worksheet-document-head { display: grid; grid-template-columns: 84px minmax(0,1fr); gap: 28px; }
.worksheet-document h2 { font-size: 1.5rem; margin: 0 0 10px; }
.worksheet-document p { color: var(--muted); font-size: .9375rem; line-height: 1.65; }
.worksheet-document .eyebrow { margin-bottom: 8px; }
.worksheet-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 20px; }
.page-lesson .lesson-actions { margin-bottom: 24px; }
.lesson-publication-note { flex-basis: 100%; margin: 0; }
.worksheet-actions > a:not(.button) { font-size: .8125rem; min-height: 44px; display: inline-flex; align-items: center; }
.worksheet-switcher { display: grid; grid-template-columns: minmax(180px, .65fr) minmax(320px, 1.35fr); align-items: end; gap: 18px 28px; margin: -8px 0 26px; padding: 16px 18px; border-block: 1px solid var(--line); background: var(--field); }
.worksheet-switcher .eyebrow { margin-bottom: 4px; }
.worksheet-switcher p { margin: 0; color: var(--muted); font-size: .8125rem; }
.worksheet-switcher form { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 10px; }
.worksheet-switcher label { min-width: 0; color: var(--muted); font-size: .75rem; }
.worksheet-switcher label span { display: block; margin-bottom: 4px; }
.worksheet-switcher select { width: 100%; min-height: 44px; padding: 8px 34px 8px 10px; color: var(--text); background: var(--surface); border: 1px solid var(--control-border); border-radius: 4px; }
.worksheet-switcher .button { min-height: 44px; }
.worksheet-default-callout { display: flex; align-items: center; justify-content: space-between; gap: 18px 28px; }
.worksheet-default-callout h2 { margin-bottom: 8px; font-size: 1.25rem; }
.worksheet-default-callout p { margin-bottom: 0; }
.worksheet-default-callout .button { flex-shrink: 0; }
/* The worksheet's own epigraph: quiet book typography on the existing paper. */
.worksheet-epigraph { width: fit-content; max-width: min(100%, 30rem); margin: 20px 0 24px auto; padding: 2px 0 2px 16px; border-left: 2px solid var(--gold); overflow-wrap: anywhere; }
.worksheet-epigraph blockquote { margin: 0; font: 400 .9375rem/1.65 'Literata', Georgia, serif; color: var(--text); }
.worksheet-epigraph figcaption { margin-top: 8px; font-size: .8125rem; line-height: 1.5; color: var(--muted); }
@media (max-width: 767px) {
  .worksheet-epigraph { width: auto; margin: 16px 0 20px; padding-left: 12px; }
}
.worksheet-problems { padding-top: 24px; margin-top: 24px; border-top: 1px solid var(--line); }
.worksheet-problems h3 { font-family: 'Golos', sans-serif; font-size: .8125rem; font-weight: 500; margin-bottom: 14px; color: var(--muted); }
.printed-problems { display: flex; flex-wrap: wrap; gap: 8px; }
.printed-problem { display: flex; align-items: baseline; gap: 14px; min-width: 42px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 3px; font-size: .875rem; }
.printed-problem strong { color: var(--berry); font-weight: 550; }
.printed-problem.has-statement { width: 100%; border: 0; border-bottom: 1px solid var(--line); padding-block: 12px; line-height: 1.7; font-size: 1rem; }
.printed-problem.has-statement strong { min-width: 28px; }
.worksheet-task-part { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px; }
.worksheet-task-part + .worksheet-task-part { margin-top: .5em; }

/* The student's progress reads as an index of worksheets, with the next task close by. */
.page-progress .page-header { margin-bottom: 20px; }
.progress-overview { display: grid; grid-template-columns: minmax(0, 1fr) minmax(230px, .85fr); margin-bottom: 24px; border: 1px solid var(--line); border-top: 3px solid var(--berry); border-radius: 4px; }
.progress-overview-total, .progress-overview-next { min-width: 0; padding: 20px 24px; }
.progress-overview .eyebrow { margin-bottom: 6px; font-size: .75rem; }
.progress-overview-count { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 11px; margin: 0 0 10px; }
.progress-overview-count strong { color: var(--heading); font: 550 2.5rem/1.2 'Literata', Georgia, serif; }
.progress-overview-count span { color: var(--muted); font-size: .875rem; }
.progress-overview progress { display: block; width: min(100%, 390px); height: 8px; overflow: hidden; border: 0; border-radius: 4px; background: var(--field-deep); accent-color: var(--success); }
.progress-overview progress::-webkit-progress-bar { background: var(--field-deep); border-radius: 4px; }
.progress-overview progress::-webkit-progress-value { background: var(--success); border-radius: 4px; }
.progress-overview progress::-moz-progress-bar { background: var(--success); border-radius: 4px; }
.progress-overview-caption { margin: 10px 0 0; color: var(--muted); font-size: .75rem; }
.progress-overview-next { display: flex; align-items: flex-start; flex-direction: column; border-left: 1px solid var(--line); background: var(--field); }
.progress-overview-next strong { color: var(--heading); font: 550 1.0625rem/1.45 'Literata', Georgia, serif; overflow-wrap: anywhere; }
.progress-overview-next > span:not(.eyebrow) { margin: 2px 0 14px; color: var(--muted); font-size: .8125rem; }
.progress-overview-next .button { margin-top: auto; }
.progress-list { border-top: 2px solid var(--primary); }
.progress-entry { display: grid; grid-template-columns: 58px minmax(0, 1fr); align-items: start; gap: 20px; padding: 22px 4px; border-bottom: 1px solid var(--line); }
.progress-entry .sheet-cover { width: 58px; height: 86px; padding: 8px 5px 8px 7px; }
.progress-entry .cover-drawing { width: 35px; height: 32px; }
.progress-entry .cover-title { display: none; }
.progress-entry .cover-imprint { font-size: .5rem; }
.progress-entry-content, .progress-entry-title { min-width: 0; }
.progress-entry-content:only-child { grid-column: 1 / -1; }
.progress-entry-head { display: flex; justify-content: space-between; gap: 14px 22px; }
.progress-entry-meta { display: block; margin: 2px 0 5px; color: var(--berry); font-size: .75rem; font-weight: 550; }
.progress-entry h2 { margin: 0; font-size: 1.25rem; }
.progress-entry h2 a { color: var(--heading); text-decoration: none; }
.progress-entry h2 a:hover { color: var(--link); text-decoration: underline; }
.progress-entry-score { flex: 0 0 auto; min-width: 120px; padding-left: 16px; border-left: 1px solid var(--binding); text-align: right; }
.progress-entry-score > span { display: block; color: var(--muted); font-size: .6875rem; }
.progress-entry-score strong { display: block; color: var(--heading); font: 550 1.375rem/1.4 'Literata', Georgia, serif; white-space: nowrap; }
.progress-entry-score small { color: var(--muted); font: 400 .75rem 'Golos', sans-serif; }
.progress-entry-tasks { margin: 7px 0 14px; color: var(--muted); font-size: .75rem; }
.progress-entry-tasks strong { color: var(--heading); font-weight: 550; }
.progress-entry-bottom { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 10px 20px; }
.progress-entry .progress-remaining { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: 0; }
.progress-entry .progress-remaining > span:first-child { margin-right: 3px; color: var(--muted); font-size: .75rem; }
.progress-entry .progress-remaining a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 7px 9px; border: 1px solid var(--line); border-radius: 3px; background: var(--field); color: var(--primary); font-size: .8125rem; text-decoration: none; }
.progress-entry .progress-remaining a:hover { border-color: var(--primary); background: var(--primary-soft); }
.progress-entry-open { display: inline-flex; align-items: center; gap: 4px; min-height: 44px; margin-left: auto; font-size: .8125rem; white-space: nowrap; }
.progress-entry .tag { margin-bottom: 0; }
.progress-entry .muted { margin: 0; font-size: .875rem; }
.progress-empty { padding: 24px 4px; }
.progress-empty p { margin-bottom: 8px; }
.progress-empty a, .progress-pagination a { display: inline-flex; align-items: center; min-height: 44px; }
.progress-pagination { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 20px; }

/* Results retain a wide, undecorated working surface within the book. */
.results-toolbar { padding: 18px; border: 1px solid var(--line); background: var(--field); border-radius: 5px; margin-bottom: 20px; }
.results-primary-controls { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 12px; }
.results-primary-controls label { flex: 1 1 300px; max-width: 520px; font-size: .8125rem; }
.results-advanced { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.results-advanced label { flex: 1 1 140px; font-size: .8125rem; }
.results-summary { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 18px; margin-bottom: 14px; font-size: .8125rem; }
.results-summary strong { font-weight: 550; color: var(--heading); }
.results-summary > div { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 18px; }
.results-summary span, .results-summary small { color: var(--muted); }
.results-summary small { flex-basis: 100%; }
.results-summary > a { margin-left: auto; }
.results-table caption { padding: 10px 12px; text-align: left; background: var(--field); color: var(--muted); font-size: .75rem; }
.results-table thead tr:nth-child(2) th { top: var(--lesson-header-height, 45px); }
.results-table thead tr:nth-child(3) th { top: calc(var(--lesson-header-height, 45px) + var(--sheet-header-height, 45px)); }
.results-table .lesson-heading, .results-table .sheet-heading { font-weight: 550; font-family: 'Golos', sans-serif; }
.results-table .student-column { font-weight: 500; }
.results-table .total-column { min-width: 74px; font-size: .75rem; }
.results-table .sheet-tone-0 { --sheet-paper: #fdfaf4; --sheet-heading: #f5eddb; --sheet-hover: #f7efdf; }
.results-table .sheet-tone-1 { --sheet-paper: #faf7fd; --sheet-heading: #eee6f5; --sheet-hover: #f0e8f7; }
.results-table .sheet-tone-2 { --sheet-paper: #f7fafd; --sheet-heading: #e7eef7; --sheet-hover: #eaf0f8; }
.results-table .sheet-tone-3 { --sheet-paper: #fdf8f9; --sheet-heading: #f5e8ec; --sheet-hover: #f7ecf0; }
.results-table td[class*="sheet-tone-"] { background: var(--sheet-paper); }
.results-table th[class*="sheet-tone-"] { background: var(--sheet-heading); }
.results-table .sheet-start { border-left: 2px solid #b8abbe; }
.results-table .sheet-end { border-right: 2px solid #b8abbe; }
.results-table .sheet-heading a { display: flex; min-height: 44px; align-items: center; justify-content: center; color: var(--heading); text-underline-offset: 3px; }
.results-table .result-cell { color: var(--muted); }
.results-table .result-cell.solved { color: var(--success); }
.results-table tbody tr:hover td[class*="sheet-tone-"],
.results-table tbody tr:focus-within td[class*="sheet-tone-"] { background: var(--sheet-hover); }
.results-table tbody tr:hover .student-column { box-shadow: 2px 0 0 #b8abbe, inset 3px 0 0 var(--primary); }
.results-empty { padding: 24px; border: 1px dashed var(--control-border); }
.external-link-note { font-size: .75rem; font-weight: 400; }

/* One deliberate confirmation; cancel never changes a mark. */
.mark-dialog { position: fixed; inset: 0; margin: auto; width: min(480px, calc(100vw - 32px)); max-height: calc(100dvh - 48px); padding: 28px; border: 1px solid var(--binding); border-top: 4px solid var(--berry); border-radius: 7px; color: var(--text); background: #fff; box-shadow: 0 18px 80px #34324d40; }
.mark-dialog::backdrop { background: #34324d5c; }
.mark-dialog h2 { font-size: 1.5rem; margin-bottom: 12px; }
.mark-dialog p { font-size: .875rem; line-height: 1.6; }
.mark-dialog label { font-size: .875rem; font-weight: 500; }
.mark-dialog textarea { margin-top: 6px; min-height: 96px; }
.dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; margin-top: 24px; }
.checking-status.warning { color: var(--warning); background: var(--warning-bg); }
.checking-summary h2 { color: #fff; }
.checking-summary { background: var(--primary); }
.checking-sheet { border-radius: 4px; border-top: 3px solid #b68b43; }
.checking-selectors { background: var(--field); }
.problem-button { box-shadow: 0 2px 0 var(--line); }
.problem-button.is-solved { box-shadow: inset 0 -2px 0 #163f36; }
.problem-button span { font-weight: 500; }
.problem-button:disabled { opacity: 1; cursor: wait; }
.checking-sheet[aria-busy='true'] .problem-button { cursor: wait; }
.auth-intro .auth-vignette { width: 254px; height: 250px; margin: 0 auto 12px; }
.auth-intro { padding-top: 38px; padding-bottom: 32px; }
.auth-intro h1 { margin-top: 24px; font-size: 2rem; color: var(--heading); }
.auth-shell::before { border-color: var(--binding); }
.auth-shell { background: var(--surface); border-color: #cebeac; box-shadow: 0 4px 0 -1px #fbf3e5, 0 5px 0 #c5b9a9, 0 8px 0 -1px #f6ead8, 0 9px 0 #bbac9d, 0 24px 70px #59416f1f, 0 0 70px #e9b86620; }
.auth-intro { background: #fcf5e9; border-radius: 7px 0 0 7px; }
.auth-intro .auth-vignette { filter: drop-shadow(0 9px 15px #b2834b1c); }
.auth-brand { color: var(--heading); }
.auth-card h2 { color: var(--heading); }
.post-card { box-shadow: none; border: 0; border-bottom: 1px solid var(--line); padding: 20px 0 24px; border-radius: 0; }
.post-card h2 { font-weight: 550; }

@media (min-width: 1024px) {
  .page-results .app-main { padding-inline: 32px; }
  .page-results .running-head { min-height: 72px; margin-bottom: 20px; }
  .page-results .page-header { padding-bottom: 16px; margin-bottom: 18px; }
  .results-toolbar { display: grid; grid-template-columns: minmax(190px, 1.65fr) minmax(140px, 1fr) minmax(180px, 1fr) auto; gap: 12px; padding: 14px; margin-bottom: 14px; align-items: end; }
  .results-primary-controls, .results-advanced { display: contents; }
  .results-primary-controls label { grid-column: 1; grid-row: 1; max-width: none; }
  .results-primary-controls button[type='submit'] { grid-column: 4; grid-row: 1; }
  .results-advanced label { min-width: 0; grid-row: 1; }
  .results-advanced label:nth-child(1) { grid-column: 2; }
  .results-advanced label:nth-child(2) { grid-column: 3; }
  .results-toolbar input, .results-toolbar select, .results-toolbar .button { font-size: .8125rem; }
  .results-summary { margin-bottom: 6px; }
  .results-table caption { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
}

@media (min-width: 1024px) and (max-height: 850px) {
  .sidebar { inset-block: 16px; }
  .brand { padding-bottom: 12px; }
  .brand-kicker { margin-bottom: 8px; }
  .nav-divider { margin-top: 6px; padding-top: 4px; }
}
@media (min-width: 1024px) and (max-width: 1279px) {
  :root { --sidebar: 220px; }
  .app-main { padding-inline: 36px; margin-right: 16px; }
  .home-spread { grid-template-columns: minmax(0,1fr) 160px; gap: 24px; }
  .margin-portal { width: 150px; height: 238px; }
  .bookshelf { grid-template-columns: 1fr; }
}
@media (max-width: 1023px) {
  .app-main { margin: 0 max(16px, env(safe-area-inset-right)) 24px max(16px, env(safe-area-inset-left)); padding-inline: 36px; }
  .mobile-header { min-height: 66px; border-bottom: 0; background: var(--surround); padding-top: max(8px, env(safe-area-inset-top)); padding-left: max(14px, env(safe-area-inset-left)); padding-right: max(14px, env(safe-area-inset-right)); }
  .mobile-brand { color: var(--heading); }
  .mobile-location { display: flex; justify-content: space-between; gap: 12px; margin: 0 24px; min-height: 40px; font-size: .6875rem; color: var(--muted); }
  .mobile-location > span:first-child { color: #fff; background: var(--berry); padding: 5px 13px 9px; margin-bottom: 8px; position: relative; }
  .mobile-location > span:first-child::after { content: ''; position: absolute; bottom: -5px; left: 0; height: 5px; width: 100%; background: var(--berry); clip-path: polygon(0 0,100% 0,100% 100%,50% 0,0 100%); }
  .mobile-location > span:last-child { padding-top: 5px; }
  .sidebar { inset: var(--mobile-header-height) auto auto 0; width: min(316px, 88vw); padding: 18px 20px max(18px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left)); background: var(--field); z-index: 40; transition: transform .18s ease; }
  .sidebar::after { right: 0; }
  .nav-backdrop:not([hidden]) { display: block; position: fixed; inset: var(--mobile-header-height) 0 0; z-index: 35; padding: 0; background: #34324d50; border: 0; }
  .nav-open { overflow: hidden; }
  .mobile-header { z-index: 45; }
  .running-head { min-height: 68px; margin-bottom: 24px; }
  .home-spread { grid-template-columns: minmax(0,1fr) 166px; gap: 28px; }
  .margin-portal { width: 156px; height: 250px; }
  .bookshelf { grid-template-columns: 1fr; }
  .notebook-welcome h1 { font-size: 1.625rem; }
  .notebook-welcome .button { font-size: .75rem; padding-inline: 12px; }
}
@media (max-width: 767px) {
  .app-main { margin: 0 max(8px, env(safe-area-inset-right)) 24px max(8px, env(safe-area-inset-left)); padding: 22px 18px 26px; }
  .app-main::before { inset: 7px; }
  .paper-corner { width: 76px; height: 76px; top: 0; }
  .paper-corner-start { left: 0; }
  .paper-corner-end { right: 0; }
  .running-head { display: none; }
  .mobile-header { padding-left: max(14px, env(safe-area-inset-left)); padding-right: max(14px, env(safe-area-inset-right)); min-height: 66px; }
  .mobile-brand { font-size: .9375rem; }
  .mobile-location { margin-inline: 18px; }
  .chapter-heading-links a, .margin-note a, .margin-contact a, .sheet-link { display: inline-flex; align-items: center; min-height: 44px; }
  .worksheet-actions > a:not(.button), .problem-actions > a { display: inline-flex; align-items: center; min-height: 44px; }
  .results-table .student-column { min-width: 112px; max-width: 132px; overflow-wrap: anywhere; }
  /* Keep only the student's name pinned: two pinned edges leave no room for tasks. */
  .results-table .total-column { position: static; }
  .page-header, .notebook-welcome { margin-top: 10px; }
  .page-header h1 { font-size: 1.625rem; }
  .notebook-welcome { align-items: flex-start; flex-direction: column; gap: 16px; margin-bottom: 20px; }
  .notebook-welcome h1 { font-size: 1.625rem; }
  .notebook-welcome > .button { width: 100%; min-height: 44px; font-size: .875rem; }
  .home-spread { display: flex; flex-direction: column; gap: 26px; }
  .home-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 24px; }
  .home-action { padding: 12px; gap: 8px; }
  .home-action-primary { grid-column: 1 / -1; }
  .home-action strong { font-size: .8125rem; }
  .home-action-primary strong { font-size: .9375rem; }
  .home-action small { font-size: .6875rem; }
  .home-action:not(.home-action-primary) > span[aria-hidden] { display: none; }
  .home-bookshelf .bookshelf-featured .bookshelf-copy > strong { font-size: 1.125rem; }
  .home-bookshelf .bookshelf-featured .sheet-cover { width: 64px; height: 100px; padding: 8px 5px 8px 7px; }
  .home-bookshelf .bookshelf-featured .cover-drawing { width: 40px; height: 35px; }
  .home-bookshelf .bookshelf-item { gap: 14px; }
  .home-bookshelf .bookshelf-copy { gap: 5px; }
  .home-materials .chapter-heading { flex-direction: row; align-items: center; gap: 12px; margin-bottom: 16px; }
  .lesson-library-tools > label { flex: 1 1 100%; }
  .lesson-library-tools > .button { width: 100%; }
  .lesson-library-tools input, .lesson-library-tools select { font-size: 16px; }
  .lesson-library-summary { margin-bottom: 18px; }
  .page-lessons .lesson-chapter { grid-template-columns: 1fr; gap: 8px; }
  .page-lessons .lesson-chapter-index { display: none; }
  .page-lessons .sheet-link { width: 100%; }
  .page-lessons .sheet-link > span:first-child { flex: 1; }
  .chapter-heading { align-items: flex-start; flex-direction: column; gap: 10px; margin-bottom: 20px; }
  .chapter-heading h2 { font-size: 1.25rem; }
  .chapter-heading-links { justify-content: flex-start; }
  .chapter-heading-links a { font-size: .75rem; }
  .home-materials { padding-top: 18px; }
  .bookshelf { grid-template-columns: 1fr; gap: 24px; }
  .bookshelf-item { gap: 20px; }
  .bookshelf-copy > strong { font-size: 1.0625rem; }
  .bookshelf-copy > span { font-size: .8125rem; }
  .bookshelf-copy > small, .bookshelf-copy .book-open { font-size: .75rem; }
  .margin-portal, .margin-teapot { display: none; }
  .home-margin { width: 100%; padding: 0; }
  .margin-note { border-left: 2px solid var(--binding); padding-left: 16px; }
  .margin-note p { margin: 8px 0; }
  .margin-note a, .margin-contact { font-size: .8125rem; }
  .margin-metric strong { font-size: 1.75rem; }
  .margin-contact { margin-top: 14px; }
  .home-news { margin-top: 26px; padding-top: 22px; }
  .editorial-news { grid-template-columns: 1fr 18px; gap: 6px 12px; padding: 18px 0; }
  .editorial-news-date { grid-column: 1 / -1; display: flex; gap: 12px; margin-bottom: 4px; }
  .pinned-label { margin: 0; }
  .editorial-news strong { font-size: 1.0625rem; }
  .editorial-news .news-excerpt { font-size: .8125rem; }
  .page-colophon { font-size: .625rem; margin-top: 28px; }
  .page-colophon::after { display: none; }
  .lesson-chapter { grid-template-columns: 45px minmax(0,1fr); gap: 16px; padding-bottom: 24px; }
  .lesson-chapter-index > strong { font-size: 1.5rem; }
  .lesson-chapter-index > small { font-size: .625rem; }
  .lesson-chapter h2 { font-size: 1.25rem; }
  .lesson-chapter p { font-size: .875rem; }
  .sheet-links { gap: 6px; flex-direction: column; }
  .sheet-link { font-size: .8125rem; }
  .worksheet-document { padding: 18px 16px; scroll-margin-top: calc(var(--mobile-header-height) + 16px); }
  .printed-problem { scroll-margin-top: calc(var(--mobile-header-height) + 16px); }
  [id^="problem-"] { scroll-margin-top: calc(var(--mobile-header-height) + 16px); }
  .worksheet-document-head { grid-template-columns: 70px minmax(0,1fr); gap: 18px; }
  .worksheet-document .sheet-cover { width: 70px; height: 108px; padding: 9px 6px 10px 8px; }
  .worksheet-document .cover-drawing { width: 45px; height: 40px; }
  .worksheet-document .cover-title { font-size: .625rem; }
  .worksheet-document h2 { font-size: 1.25rem; }
  .worksheet-document p { font-size: .8125rem; }
  .worksheet-actions { gap: 10px 16px; }
  .worksheet-actions .button { width: 100%; }
  .lesson-actions > form { width: 100%; }
  .worksheet-switcher { grid-template-columns: minmax(0, 1fr); gap: 12px; margin-top: -4px; padding: 14px 12px; }
  .worksheet-switcher form { min-width: 0; grid-template-columns: minmax(0, 1fr); }
  .worksheet-switcher .button { width: 100%; }
  .worksheet-default-callout { align-items: flex-start; flex-direction: column; }
  .worksheet-default-callout .button { width: 100%; }
  .worksheet-problems { margin-top: 18px; padding-top: 18px; }
  .progress-overview { grid-template-columns: minmax(0, 1fr); }
  .progress-overview-total { padding: 14px 16px 8px; }
  .progress-overview-next { padding: 0 16px 8px; border: 0; background: transparent; }
  .progress-overview-next .eyebrow, .progress-overview-next strong, .progress-overview-next > span:not(.eyebrow) { display: none; }
  .progress-overview-next .button { min-height: 44px; padding: 6px 0; border: 0; background: transparent; box-shadow: none; color: var(--link); font-size: .8125rem; }
  .progress-overview-next .button:hover { background: transparent; color: var(--link); text-decoration: underline; }
  .progress-overview-count strong { font-size: 2.125rem; }
  .progress-entry { grid-template-columns: 48px minmax(0, 1fr); gap: 12px; padding-block: 20px; }
  .progress-entry .sheet-cover { width: 48px; height: 72px; padding: 6px 4px 6px 6px; }
  .progress-entry .cover-drawing { width: 28px; height: 28px; }
  .progress-entry-head { align-items: flex-start; flex-direction: column; gap: 8px; }
  .progress-entry h2 { font-size: 1.125rem; }
  .progress-entry-score { display: flex; align-items: baseline; gap: 8px; min-width: 0; padding: 0; border: 0; text-align: left; }
  .progress-entry-score strong { font-size: 1.125rem; }
  .progress-entry-tasks { margin: 4px 0 12px; }
  .progress-entry .progress-remaining { width: 100%; }
  .progress-entry .progress-remaining > span:first-child { flex-basis: 100%; }
  .progress-entry-open { margin-left: 0; }
  .results-toolbar { padding: 12px; }
  .results-primary-controls { gap: 10px; }
  .results-primary-controls label { flex-basis: 100%; }
  .results-primary-controls .button { flex: 1 1 auto; font-size: .8125rem; }
  .results-advanced { gap: 12px; }
  .results-advanced label { flex: 1 1 100%; }
  .results-summary { font-size: .75rem; }
  .results-summary small { font-size: .6875rem; }
  .results-table caption { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .page-checking .page-header { margin-bottom: 16px; }
  .page-checking .checking-selectors { padding: 12px; }
  .page-checking .checking-summary { position: sticky; top: var(--mobile-header-height); z-index: 3; }
  .checking-sheet { overflow: visible; }
  .checking-summary h2 { font-size: 1.25rem; }
  .problem-buttons { padding: 12px; gap: 10px; }
  .mark-dialog { padding: 22px; }
  .dialog-actions { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .dialog-actions .button { font-size: .8125rem; padding-inline: 10px; }
  .auth-intro .auth-vignette { display: none; }
  .auth-intro { padding-top: 30px; }
  .auth-intro h1 { font-size: 1.875rem; }
}
@media (prefers-reduced-motion: reduce) { .sidebar { transition: none; } }
@media print { .paper-corner, .home-margin, .mobile-location, .nav-backdrop { display: none !important; } .app-main::before, .page-colophon::after { display: none; } .app-main { box-shadow: none; } }

.page-worksheet .printed-problem { width: 100%; }
.problem-copy { min-width: 0; flex: 1; }
.problem-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-top: 6px; }

.results-table thead tr:nth-child(4) th { top: calc(var(--lesson-header-height, 45px) + var(--sheet-header-height, 45px) + var(--task-header-height, 40px)); }

/* A lesson owns its worksheet links, in the catalogue and home overview. */
.lesson-catalog { display: grid; }
.lesson-catalog-row { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr) minmax(10rem, .55fr); gap: 12px 24px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.lesson-catalog-row > * { min-width: 0; }
.lesson-catalog-date { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; color: var(--muted); font-size: .875rem; font-variant-numeric: tabular-nums; }
.lesson-catalog-topic h2 { margin: 0; font-size: 1.25rem; }
.lesson-catalog-topic h2 a { color: var(--heading); text-decoration: none; }
.lesson-catalog-topic h2 a:hover { color: var(--link); text-decoration: underline; }
.lesson-sheet-links { display: flex; align-items: center; flex-wrap: wrap; gap: 0; }
.lesson-sheet-links a { display: inline-flex; align-items: center; min-height: 44px; text-underline-offset: 3px; }
.lesson-sheet-separator { margin-right: 6px; }
.home-lesson-list .lesson-catalog-row { grid-template-columns: minmax(0, 1fr) auto; }
.home-lesson-list .lesson-catalog-date { grid-column: 1 / -1; }
.progress-lesson { padding: 16px 0; border-bottom: 1px solid var(--line); }
.progress-lesson-heading { margin: 0 0 12px; }
.progress-lesson-heading h2 { margin: 4px 0; font-size: 1.25rem; }
.progress-lesson .progress-entry { border-bottom: 0; }
.progress-sheet-label { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; }
@media (max-width: 767px) {
  .lesson-catalog-row, .home-lesson-list .lesson-catalog-row { grid-template-columns: minmax(0, 1fr); gap: 6px; padding: 14px 0; }
  .lesson-catalog-topic h2 { font-size: 1.125rem; }
  .lesson-catalog-topic h2 a { display: inline-flex; align-items: center; min-height: 44px; }
}

.lesson-sheet-scores { gap: 4px 16px; }
.lesson-sheet-scores a { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.lesson-sheet-scores small { color: var(--muted); font-size: .75rem; text-decoration: none; }