:root {
  color-scheme: light;
  --paper: #fbf9f5;
  --ink: #241e2b;
  --muted: #5c555f;
  --violet: #592da6;
  --violet-deep: #42217e;
  --line: #dad4d5;
  --display: "Arial Black", Arial, system-ui, sans-serif;
  --sans: "Segoe UI", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 var(--sans); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--violet); outline-offset: 4px; }
[id] { scroll-margin-top: 25px; }
.frame { width: min(1160px, calc(100% - 88px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 5; top: .5rem; left: .5rem; transform: translateY(-160%); background: white; padding: .6rem 1rem; }
.skip-link:focus { transform: none; }
.site-header { border-bottom: 1px solid var(--line); }
.site-nav { min-height: 75px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.wordmark { display: inline-flex; align-items: center; font-size: 1.32rem; font-weight: 790; letter-spacing: -.055em; text-decoration: none; white-space: nowrap; }
.wordmark img { margin-right: 9px; object-fit: contain; }
.wordmark span { color: var(--violet); }
.site-nav nav { display: flex; gap: clamp(15px, 3vw, 36px); font-size: .9rem; font-weight: 550; }
.site-nav nav a { text-decoration: none; }
.site-nav nav a:hover, .nav-action:hover, .course-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.nav-action { color: var(--violet); text-decoration: none; font-weight: 700; font-size: .88rem; white-space: nowrap; }
.pill { display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 4px; padding: .69rem 1.12rem; text-decoration: none; white-space: nowrap; font-size: .93rem; font-weight: 680; line-height: 1.35; }
.primary { background: var(--violet); color: white; }
.primary:hover { background: var(--violet-deep); }
.hero { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: clamp(22px, 5.8vw, 92px); align-items: center; padding-block: clamp(42px, 6vw, 89px); }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--display); font-weight: 900; line-height: 1.03; letter-spacing: -.055em; }
h1 { font-size: clamp(2.52rem, 4.9vw, 5rem); margin-bottom: 21px; }
h2 { font-size: clamp(2.12rem, 3.65vw, 3.45rem); margin: 0 0 22px; }
h3 { font-weight: 680; font-size: 1.23rem; letter-spacing: -.018em; line-height: 1.2; margin: 0 0 10px; }
.hero-text { max-width: 34ch; color: var(--muted); font-size: clamp(1rem, 1.45vw, 1.13rem); margin-bottom: 24px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; }
.hero-secondary { font-size: .91rem; text-underline-offset: 4px; }
.hero-visual { display: block; width: 100%; min-width: 0; height: auto; aspect-ratio: 1.46; object-fit: cover; object-position: center 44%; background: #e8e1d8; border-radius: 2px; }
.tutor-search { max-width: 430px; }
.classroom-signin { margin: 1.1rem 0 0; }
.tutor-search label { display: block; font-weight: 700; font-size: .91rem; margin-bottom: 6px; }
.tutor-search-controls { display: flex; gap: 7px; }
.tutor-search input { border: 1px solid #bcb4c0; border-radius: 4px; padding: .66rem .7rem; min-width: 0; width: 100%; background: #fffefa; color: var(--ink); font-size: .93rem; }
.section-pad { padding-block: clamp(43px, 6vw, 80px); }
.finder-section { background: #f2eee8; border-block: 1px solid #e4ded7; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.home-links { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 11px 25px; padding-block: 26px; }
.home-links a { font-size: .91rem; color: var(--violet); text-underline-offset: 4px; }
.page-content { min-height: min(65vh, 620px); }
.page-content h1 { font-size: clamp(2.4rem, 4.55vw, 4.55rem); }
.page-intro { max-width: 54ch; margin-bottom: 27px; color: var(--muted); }
.breadcrumb { display: inline-block; margin-bottom: 20px; color: var(--violet); text-underline-offset: 4px; font-size: .88rem; }
.course-details { margin-bottom: 24px; }
.course-grid { border-top: 1px solid var(--line); }
.course-row { display: grid; grid-template-columns: .9fr 1.35fr 1fr; gap: clamp(15px, 3vw, 34px); align-items: baseline; padding: 24px 0; border-bottom: 1px solid var(--line); }
.course-row h2 { font: 900 clamp(1.48rem, 2.25vw, 1.95rem)/1.12 var(--display); letter-spacing: -.045em; margin: 0; }
.course-row p { color: var(--muted); margin: 0; max-width: 42ch; }
.course-link { display: inline-flex; align-items: center; gap: 7px; border: 0; padding: 0; background: none; color: var(--violet); text-decoration: none; font-size: .91rem; font-weight: 680; text-align: start; }
.course-link span { font-size: 1.13em; }
.igcse-actions { display: flex; align-items: flex-start; flex-direction: column; gap: 9px; }
.room-band { background: #f0ebf5; border-block: 1px solid #e5deea; }
.room-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(25px, 7vw, 96px); align-items: start; }
.room-text, .section-intro { color: var(--muted); max-width: 51ch; margin: 0 0 20px; }
.lesson-brief { border-left: 1px solid #b5a0cc; padding-left: clamp(17px, 3vw, 32px); }
.lesson-brief .brief-title { font: 660 1.2rem/1.25 var(--sans); letter-spacing: -.02em; margin-bottom: 12px; }
.small-label { color: var(--violet); font-size: .81rem; font-weight: 700; margin: 0 0 10px; }
.lesson-brief dl, .parent-progress dl { margin: 0; }
.lesson-brief dl > div, .parent-progress dl > div { display: grid; grid-template-columns: minmax(90px, .36fr) 1fr; align-items: baseline; gap: 12px; border-top: 1px solid #dcd4e2; padding: 8px 0; }
.lesson-brief dt, .parent-progress dt { font-weight: 650; font-size: .83rem; }
.lesson-brief dd, .parent-progress dd { margin: 0; color: var(--muted); font-size: .89rem; }
.progress-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 6vw, 75px); padding-top: 22px; border-top: 1px solid var(--line); }
.progress-column > p { color: var(--muted); }
.demo-note { font-size: .77rem; margin: 8px 0 0; }
.site-footer { border-top: 1px solid var(--line); padding-block: 22px; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.footer-row p { margin: 0; font-size: .83rem; color: var(--muted); }
.footer-row .wordmark img { width: 28px; height: 30px; }
.quiz-dialog { width: min(530px, calc(100% - 26px)); max-height: calc(100dvh - 26px); overflow: auto; padding: clamp(18px, 4vw, 28px); border: 1px solid var(--line); border-radius: 6px; background: var(--paper); color: var(--ink); }
.quiz-dialog::backdrop { background: #2012329e; }
.quiz-head { display: flex; align-items: start; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.quiz-head h2 { font-size: clamp(1.7rem, 6vw, 2.5rem); margin: 0; }
.quiz-close { width: 34px; height: 34px; background: transparent; border: 1px solid var(--line); border-radius: 3px; line-height: 1; color: var(--ink); font-size: 1.4rem; }
.quiz-page #quiz-content { max-width: 545px; }
.quiz-parent-link { margin-top: 18px; }
#lesson-quiz fieldset { border: 0; border-top: 1px solid var(--line); padding: 4px 0 0; margin: 0 0 16px; }
#lesson-quiz legend { font-weight: 670; margin-bottom: 4px; }
#lesson-quiz label { display: flex; align-items: center; gap: 8px; padding: 4px 6px; }
#lesson-quiz label:has(input:checked) { background: #eee7f5; }
#lesson-quiz input { accent-color: var(--violet); }
.quiz-feedback { font-size: .86rem; margin: 5px 0 0; color: #573f73; }
.quiz-feedback:empty { display: none; }
.quiz-result { padding: 8px 10px; background: #ece1f4; margin-bottom: 12px; }
@media (max-width: 850px) {
  .frame { width: calc(100% - 52px); }
  .hero { gap: 23px; }
  .course-row { grid-template-columns: .9fr 1.1fr 1fr; }
}
@media (max-width: 650px) {
  .frame { width: calc(100% - 34px); }
  .site-nav { min-height: 0; flex-wrap: wrap; gap: 8px 14px; padding-block: 12px; }
  .site-nav nav { order: 3; flex-basis: 100%; justify-content: space-between; gap: 8px; font-size: .84rem; }
  .wordmark { font-size: 1.2rem; }
  .wordmark img { width: 30px; height: 32px; margin-right: 6px; }
  .hero, .room-grid, .progress-grid, .course-row { grid-template-columns: 1fr; }
  .hero { gap: 23px; }
  .course-row { gap: 8px; }
  .progress-grid { gap: 24px; }
  .footer-row { align-items: end; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }