:root {
  --ink: #171b27;
  --muted: #687080;
  --line: #e6e8ea;
  --cream: #f7f5ef;
  --white: #ffffff;
  --green: #d83c4d;
  --green-dark: #a91f31;
  --yellow: #ffd85a;
  --blue: #4b87ff;
  --purple: #8c6cff;
  --shadow: 0 22px 60px rgba(28, 35, 48, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "DM Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
button, a { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

.site-header {
  height: 78px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 10;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Manrope", sans-serif;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.7px;
}
.brand-accent { color: var(--green); }
.brand-mark { width: 28px; height: 28px; display: flex; align-items: end; gap: 3px; transform: rotate(-4deg); }
.brand-mark span { width: 7px; border-radius: 5px 5px 2px 2px; background: var(--ink); }
.brand-mark span:nth-child(1) { height: 12px; }
.brand-mark span:nth-child(2) { height: 21px; background: var(--green); }
.brand-mark span:nth-child(3) { height: 16px; }
.main-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; color: #4e5665; font-weight: 600; }
.main-nav a { transition: color .2s; }
.main-nav a:hover { color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.text-button { border: 0; background: transparent; color: #4e5665; font-weight: 600; }
.channel-link { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; }
.youtube-icon { width: 17px; height: 17px; display: inline-grid; place-items: center; border-radius: 5px; background: #ff3347; color: white; font-size: 7px; line-height: 1; }
.youtube-icon-light { background: white; color: #ff3347; }
.book-icon { width: 16px; height: 13px; display: inline-block; position: relative; border: 1.5px solid currentColor; border-radius: 2px 4px 4px 2px; }
.book-icon::before { content: ""; position: absolute; left: 4px; top: -1.5px; bottom: -1.5px; width: 1.5px; background: currentColor; }
.book-icon::after { content: ""; position: absolute; left: 7px; right: 2px; top: 3px; height: 1px; background: currentColor; box-shadow: 0 3px 0 currentColor; opacity: .65; }
.book-icon-light { color: white; }
.button {
  border: 0;
  border-radius: 10px;
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: 700;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button-small { min-height: 42px; padding: 0 18px; font-size: 14px; }
.button-dark { background: var(--ink); color: white; box-shadow: 0 8px 18px rgba(23,27,39,.14); }
.button-primary { background: var(--green); color: white; box-shadow: 0 10px 22px rgba(25,169,116,.22); }
.button-primary:hover { background: var(--green-dark); }
.button-ghost { background: transparent; border: 1px solid #d9dde1; color: var(--ink); }
.button-outline { background: white; border: 1px solid #cfd4d8; color: var(--ink); }
.button-light { background: white; color: var(--ink); box-shadow: 0 10px 24px rgba(0,0,0,.12); }
.menu-button { display: none; border: 0; background: transparent; width: 36px; height: 36px; padding: 7px; }
.menu-button span { display: block; height: 2px; margin: 4px 0; background: var(--ink); border-radius: 2px; }
.network-switcher {
  border-top: 1px solid #f1f2f3;
  border-bottom: 1px solid #e9ecef;
  background: rgba(247, 245, 239, 0.76);
  backdrop-filter: blur(14px);
}
.network-switcher-inner {
  max-width: 1280px;
  margin: 0 auto;
  min-height: 44px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  white-space: nowrap;
}
.network-switcher span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.network-switcher a {
  border: 1px solid #dfe4e7;
  border-radius: 999px;
  padding: 7px 12px;
  background: white;
  color: #4e5665;
  font-size: 13px;
  font-weight: 800;
  transition: border-color .2s, color .2s, background .2s;
}
.network-switcher a:hover,
.network-switcher a[aria-current="page"] {
  border-color: rgba(25, 169, 116, .32);
  background: #eef9f4;
  color: var(--green-dark);
}
.section-shell { max-width: 1180px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: 48% 52%;
  align-items: center;
  padding-top: 48px;
  padding-bottom: 80px;
}
.eyebrow, .section-kicker {
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 8px 11px; background: #eef9f4; border-radius: 30px; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3 { font-family: "Manrope", sans-serif; letter-spacing: -0.055em; }
.hero h1 { margin: 24px 0 22px; font-size: clamp(52px, 5.2vw, 76px); line-height: 1.01; font-weight: 800; }
.hero h1 span { color: var(--green); }
.hero-intro { max-width: 490px; color: var(--muted); font-size: 18px; line-height: 1.65; }
.hero-actions { display: flex; gap: 12px; margin-top: 31px; }
.hero-proof { margin-top: 38px; display: flex; align-items: center; gap: 12px; }
.student-faces { display: flex; }
.student-faces span {
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  margin-left: -6px; border: 2px solid white; color: white; font-size: 9px; font-weight: 800;
}
.student-faces span:first-child { margin-left: 0; background: #ed9b6e; }
.student-faces span:nth-child(2) { background: #6478bd; }
.student-faces span:nth-child(3) { background: #d36d7d; }
.student-faces span:nth-child(4) { background: var(--ink); }
.hero-proof p { margin: 0; color: #7c8491; font-size: 12px; line-height: 1.45; }
.hero-proof strong { color: #444c5a; font-size: 13px; }

.hero-visual { position: relative; height: 570px; display: grid; place-items: center; }
.orbit { position: absolute; border: 1px solid #edf0f1; border-radius: 50%; }
.orbit-one { width: 530px; height: 530px; }
.orbit-two { width: 420px; height: 420px; border-style: dashed; }
.lesson-window {
  width: 470px; min-height: 490px; background: white; border: 1px solid #e2e6e8; border-radius: 18px;
  box-shadow: var(--shadow); position: relative; z-index: 2; overflow: hidden;
}
.window-top { height: 48px; display: flex; align-items: center; justify-content: space-between; padding: 0 16px; border-bottom: 1px solid #edf0f2; }
.window-dots { display: flex; gap: 5px; }
.window-dots span { width: 6px; height: 6px; border-radius: 50%; background: #d9dee2; }
.lesson-label { color: #7c8490; font-size: 11px; font-weight: 700; }
.streak-pill { padding: 4px 8px; background: #fff6df; border-radius: 20px; font-size: 11px; font-weight: 700; }
.lesson-body { padding: 24px 34px 28px; }
.progress-line { width: 100%; height: 4px; background: #eff2f2; border-radius: 5px; overflow: hidden; }
.progress-line span { display: block; width: 68%; height: 100%; background: var(--green); border-radius: inherit; }
.question-count { margin: 22px 0 7px; color: #9299a4; text-transform: uppercase; font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.lesson-body h2 { font-size: 25px; line-height: 1.25; letter-spacing: -.04em; }
.lesson-body h2 em { font-family: "DM Sans", sans-serif; font-style: normal; color: var(--green-dark); }
.graph-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-top: 18px; }
.graph-card { height: 118px; position: relative; border: 1px solid #e3e7e9; border-radius: 10px; background: #fbfcfc; }
.graph-card.selected { border: 2px solid var(--green); background: #f6fffb; }
.option-letter { position: absolute; top: 8px; left: 9px; color: #a2a8b1; font-size: 10px; font-weight: 800; }
.correct-mark { position: absolute; top: 7px; right: 7px; width: 15px; height: 15px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: white; font-size: 9px; }
.mini-graph { position: absolute; width: 70px; height: 70px; left: 50%; top: 52%; transform: translate(-50%, -50%); background-image: linear-gradient(#edf0f1 1px, transparent 1px), linear-gradient(90deg, #edf0f1 1px, transparent 1px); background-size: 14px 14px; }
.mini-graph::before, .mini-graph::after { content: ""; position: absolute; background: #b7bec8; }
.mini-graph::before { width: 1px; height: 100%; left: 50%; }
.mini-graph::after { height: 1px; width: 100%; top: 50%; }
.graph-a { border-top: 2px solid var(--blue); border-radius: 50% 50% 0 0; transform: translate(-50%, -42%) rotate(180deg); }
.graph-b { border-top: 2px solid var(--green); border-radius: 50% 50% 0 0; transform: translate(-50%, -55%); }
.graph-c { border-left: 2px solid var(--purple); border-radius: 50%; width: 55px; }
.answer-feedback { margin-top: 20px; padding: 12px 13px; border-radius: 9px; background: #ecfaf4; display: flex; align-items: center; gap: 10px; }
.feedback-icon { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: white; font-size: 12px; }
.answer-feedback strong { font-size: 12px; }
.answer-feedback p { margin: 1px 0 0; color: #718078; font-size: 10px; }
.floating-card { position: absolute; z-index: 3; background: white; border: 1px solid #e6e9eb; border-radius: 12px; box-shadow: 0 12px 28px rgba(27,35,47,.11); }
.card-grade { right: -10px; top: 93px; padding: 13px 16px; width: 122px; }
.card-grade p { margin: 6px 0 1px; color: #8a929e; font-size: 10px; }
.card-grade strong { font-family: "Manrope"; font-size: 24px; }
.floating-icon { color: var(--green); font-weight: 800; }
.card-mastered { left: -23px; bottom: 64px; padding: 11px 15px 11px 11px; display: flex; align-items: center; gap: 9px; }
.card-mastered strong { display: block; font-size: 11px; }
.card-mastered p { margin: 1px 0 0; color: #949ba5; font-size: 9px; }
.mastery-ring { width: 39px; height: 39px; padding: 4px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--blue) 82%, #edf0f2 0); }
.mastery-ring span { width: 31px; height: 31px; border-radius: 50%; background: white; display: grid; place-items: center; font-size: 8px; font-weight: 800; }
.spark { position: absolute; width: 8px; height: 8px; border-radius: 2px; transform: rotate(45deg); }
.spark-one { background: var(--yellow); top: 47px; left: 70px; }
.spark-two { background: var(--green); right: 45px; bottom: 76px; }
.spark-three { background: var(--purple); left: 28px; top: 170px; width: 5px; height: 5px; }

.stat-strip { background: var(--cream); min-height: 122px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; padding: 20px max(24px, calc((100vw - 1080px) / 2)); }
.stat-strip div { text-align: center; border-right: 1px solid #e0ded7; }
.stat-strip div:last-child { border: 0; }
.stat-strip strong { display: block; font-family: "Manrope"; font-size: 26px; letter-spacing: -.04em; }
.stat-strip span { color: #7c807f; font-size: 12px; }
.stat-strip .star { color: #ffbd2e; margin-left: 3px; font-size: 17px; }

.subjects { padding-top: 120px; padding-bottom: 125px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 48px; }
.section-kicker { margin-bottom: 18px; }
.section-heading h2, .learning-heading h2, .dashboard-copy h2, .testimonial-section h2, .teacher-copy h2, .final-cta h2 {
  margin: 0; font-size: clamp(40px, 4.2vw, 58px); line-height: 1.07; font-weight: 800;
}
.section-description { max-width: 380px; margin: 0 0 7px; color: var(--muted); line-height: 1.7; font-size: 15px; }
.subject-tabs { display: flex; gap: 8px; padding-bottom: 24px; overflow-x: auto; }
.subject-tab { white-space: nowrap; border: 1px solid #e0e4e6; border-radius: 30px; background: white; padding: 9px 14px; color: #687080; font-size: 12px; font-weight: 700; }
.subject-tab.active { background: var(--ink); border-color: var(--ink); color: white; }
.subject-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.subject-card { border: 1px solid #e4e7e8; border-radius: 15px; overflow: hidden; background: white; transition: transform .25s, box-shadow .25s, opacity .25s; }
.subject-card:hover { transform: translateY(-5px); box-shadow: 0 16px 35px rgba(25,31,43,.09); }
.subject-card.hidden { display: none; }
.subject-art { height: 150px; position: relative; overflow: hidden; }
.subject-content { padding: 18px 18px 16px; }
.subject-tag { color: #8b929d; text-transform: uppercase; font-size: 9px; font-weight: 800; letter-spacing: .1em; }
.subject-content h3 { margin: 8px 0 7px; font-size: 21px; letter-spacing: -.04em; }
.subject-content p { min-height: 50px; color: #757d89; font-size: 12px; line-height: 1.55; }
.card-meta { padding-top: 13px; border-top: 1px solid #eef0f1; display: flex; align-items: center; gap: 9px; color: #9aa1aa; font-size: 10px; }
.card-arrow { margin-left: auto; color: var(--ink); font-size: 15px; transition: transform .2s; }
.subject-card:hover .card-arrow { transform: translateX(3px); }
.art-maths { background: #ecf8f3; }
.shape { position: absolute; display: block; }
.cube { width: 64px; height: 64px; left: 34px; top: 47px; background: #42c594; transform: rotate(29deg); box-shadow: inset -12px -10px 0 rgba(0,0,0,.07); }
.cone { width: 0; height: 0; border-left: 28px solid transparent; border-right: 28px solid transparent; border-bottom: 67px solid #ffca4b; right: 30px; top: 38px; transform: rotate(15deg); }
.sphere { width: 24px; height: 24px; border-radius: 50%; background: #6c8eff; right: 76px; bottom: 20px; }
.art-biology { background: #eef5ff; }
.cell { position: absolute; border-radius: 50%; background: #72a4ff; border: 8px solid #adc9ff; box-shadow: inset 0 0 0 8px #dbe8ff; }
.cell::after { content: ""; position: absolute; width: 10px; height: 10px; left: 50%; top: 50%; transform: translate(-50%,-50%); border-radius: 50%; background: #547fd5; }
.cell-one { width: 70px; height: 70px; top: 37px; left: 40px; }
.cell-two { width: 42px; height: 42px; top: 28px; right: 40px; border-width: 5px; box-shadow: inset 0 0 0 5px #dbe8ff; }
.cell-three { width: 34px; height: 34px; bottom: 25px; right: 65px; border-width: 4px; box-shadow: inset 0 0 0 4px #dbe8ff; }
.art-physics { background: #f1efff; }
.atom-ring { position: absolute; left: 50%; top: 50%; width: 120px; height: 46px; margin: -23px 0 0 -60px; border: 2px solid #9c84ee; border-radius: 50%; }
.ring-two { transform: rotate(60deg); }.ring-three { transform: rotate(-60deg); }
.atom-core { position: absolute; width: 16px; height: 16px; border-radius: 50%; background: #7258d6; left: 50%; top: 50%; transform: translate(-50%,-50%); box-shadow: 52px 0 0 -4px #ffbf44, -25px 40px 0 -4px #4fbf91; }
.art-chemistry { background: #fff5e9; }
.flask { position: absolute; width: 70px; height: 74px; left: 50%; bottom: 21px; transform: translateX(-50%); border: 3px solid #e59b3b; border-top: 0; border-radius: 7px 7px 25px 25px; overflow: hidden; }
.flask::before { content: ""; position: absolute; width: 28px; height: 35px; left: 18px; top: -25px; border-left: 3px solid #e59b3b; border-right: 3px solid #e59b3b; }
.flask span { position: absolute; left: 0; right: 0; bottom: 0; height: 38px; background: #ffc65d; border-radius: 50% 50% 0 0; }
.bubble { position: absolute; border: 2px solid #e9a746; border-radius: 50%; }
.bubble-one { width: 12px; height: 12px; top: 25px; right: 80px; }
.bubble-two { width: 7px; height: 7px; top: 50px; right: 60px; }
.art-english { background: #fff0f3; }
.quote-mark { position: absolute; left: 40px; top: 15px; color: #ee829b; font-family: Georgia; font-size: 90px; line-height: 1; }
.paper-line { position: absolute; height: 5px; background: #f5bac7; border-radius: 4px; left: 90px; }
.line-one { top: 56px; width: 100px; }.line-two { top: 75px; width: 80px; }.line-three { top: 94px; width: 93px; }
.art-computing { background: #edf9f7; }
.code-chip { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); width: 105px; height: 70px; display: grid; place-items: center; border-radius: 13px; background: #39b99d; color: white; font-family: monospace; font-weight: 800; font-size: 23px; box-shadow: 9px 10px 0 #c4eee5; }
.code-dot { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: #78d2c0; }
.dot-one { left: 36px; top: 31px; }.dot-two { right: 32px; bottom: 27px; }
.art-history { background: #f6f0e9; display: flex; align-items: end; justify-content: center; gap: 17px; padding-bottom: 26px; }
.history-column { width: 20px; height: 66px; background: #c7aa87; border-radius: 2px; box-shadow: 0 -8px 0 #ad8f6e, 0 8px 0 #ad8f6e; }
.art-history::before, .art-history::after { content: ""; position: absolute; left: 58px; right: 58px; height: 8px; background: #ad8f6e; border-radius: 2px; }
.art-history::before { top: 36px; }.art-history::after { bottom: 13px; }
.art-business { background: #eef3ff; }
.bar { position: absolute; bottom: 31px; width: 24px; border-radius: 4px 4px 0 0; background: #7293e9; }
.bar-one { height: 35px; left: 62px; }.bar-two { height: 62px; left: 103px; }.bar-three { height: 83px; left: 144px; }
.trend-line { position: absolute; width: 125px; height: 2px; background: #ffbd49; left: 57px; top: 75px; transform: rotate(-25deg); }
.trend-line::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: #ffbd49; right: -2px; top: -4px; }
.show-more { display: flex; margin: 30px auto 0; }
.focused-subject-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
.focused-subject-grid .subject-art { height: 230px; }
.focused-subject-grid .subject-content { padding: 25px 27px 24px; }
.focused-subject-grid .subject-content h3 { font-size: 30px; }
.focused-subject-grid .subject-content p { min-height: 0; max-width: 470px; font-size: 14px; }
.focused-subject-grid .cube { width: 88px; height: 88px; left: 90px; top: 73px; }
.focused-subject-grid .cone { right: 105px; top: 62px; border-left-width: 40px; border-right-width: 40px; border-bottom-width: 94px; }
.focused-subject-grid .sphere { width: 34px; height: 34px; right: 190px; bottom: 35px; }
.focused-subject-grid .atom-ring { width: 180px; height: 70px; margin: -35px 0 0 -90px; }
.focused-subject-grid .atom-core { width: 22px; height: 22px; box-shadow: 78px 0 0 -5px #ffbf44, -38px 60px 0 -5px #4fbf91; }
.course-actions { margin-top: 20px; padding-top: 16px; border-top: 1px solid #eef0f1; display: flex; justify-content: space-between; gap: 12px; }
.course-actions a { color: var(--green-dark); font-size: 12px; font-weight: 700; }

.qualification-section { padding: 120px 0 125px; border-top: 1px solid #f0f2f2; }
.qualification-tabs { display: flex; gap: 8px; margin-bottom: 25px; overflow-x: auto; }
.qualification-tab { white-space: nowrap; border: 1px solid #e0e4e6; border-radius: 30px; background: white; padding: 9px 14px; color: #687080; font-size: 12px; font-weight: 700; }
.qualification-tab.active { background: var(--ink); border-color: var(--ink); color: white; }
.qualification-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.qualification-card { min-height: 205px; padding: 19px; border: 1px solid #e3e7e8; border-radius: 13px; background: white; transition: transform .2s, box-shadow .2s, border-color .2s; }
.qualification-card:hover { transform: translateY(-4px); border-color: #cfd8d4; box-shadow: 0 13px 28px rgba(28,37,33,.08); }
.qualification-card.hidden { display: none; }
.featured-qualification { background: #fbfaf5; border-color: #e8e1c9; }
.qualification-card-head { display: flex; align-items: center; justify-content: space-between; }
.level-pill, .code-pill { display: inline-flex; align-items: center; min-height: 24px; border-radius: 20px; font-size: 8px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.level-pill { padding: 0 8px; color: var(--green-dark); background: #eaf8f1; }
.olevel-pill { color: #8168cb; background: #f1edff; }
.advanced-pill { color: #9a7025; background: #fff5db; }
.code-pill { padding: 0 9px; color: white; }
.maths-code { background: var(--green); }
.physics-code { background: var(--purple); }
.qualification-card h3 { margin: 19px 0 8px; font-size: 17px; letter-spacing: -.035em; }
.qualification-card p { min-height: 58px; color: #7a828d; font-size: 11px; line-height: 1.55; }
.qualification-card a { display: inline-block; margin-top: 12px; color: var(--green-dark); font-size: 10px; font-weight: 700; }
.qualification-note { max-width: 720px; margin: 24px auto 0; color: #9aa1a8; text-align: center; font-size: 10px; line-height: 1.6; }

.syllabus-section { padding: 120px 0; background: #f5f7f6; }
.syllabus-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.syllabus-card { padding: 31px; border: 1px solid #dfe5e2; border-radius: 18px; background: white; box-shadow: 0 14px 34px rgba(31,44,38,.05); }
.syllabus-card-top { display: flex; align-items: center; justify-content: space-between; color: #929b98; font-size: 11px; }
.syllabus-code { display: inline-grid; place-items: center; min-width: 56px; height: 29px; border-radius: 20px; color: white; background: var(--green); font-weight: 800; letter-spacing: .08em; }
.physics-syllabus .syllabus-code { background: var(--purple); }
.additional-syllabus .syllabus-code, .advanced-maths-syllabus .syllabus-code, .further-maths-syllabus .syllabus-code { background: #327fcb; }
.advanced-physics-syllabus .syllabus-code { background: #7158d3; }
.syllabus-card h3 { margin: 24px 0 20px; font-size: 28px; letter-spacing: -.045em; }
.topic-chips { display: flex; flex-wrap: wrap; gap: 8px; min-height: 128px; align-content: start; }
.topic-chips span { padding: 8px 10px; border-radius: 7px; background: #f3f6f5; color: #67716e; font-size: 11px; font-weight: 600; }
.physics-syllabus .topic-chips span { background: #f5f3ff; color: #746d92; }
.additional-syllabus .topic-chips span, .advanced-maths-syllabus .topic-chips span, .further-maths-syllabus .topic-chips span { background: #eff6fd; color: #587894; }
.advanced-physics-syllabus .topic-chips span { background: #f3f0ff; color: #716991; }
.syllabus-links { margin-top: 25px; padding-top: 19px; border-top: 1px solid #edf0ef; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.syllabus-links .button { min-height: 42px; padding: 0 15px; font-size: 11px; }
.syllabus-links > a:not(.button) { color: var(--green-dark); font-size: 11px; font-weight: 700; }

.resource-section { padding-top: 120px; padding-bottom: 125px; }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.resource-card { min-height: 235px; padding: 22px; border: 1px solid #e2e6e7; border-radius: 14px; background: white; transition: transform .2s, box-shadow .2s, border-color .2s; }
.resource-card:hover { transform: translateY(-4px); border-color: #cbd5d1; box-shadow: 0 14px 30px rgba(25,35,31,.08); }
.official-resource { background: #f5fcf8; border-color: #d9eee4; }
.resource-badge { display: inline-block; padding: 5px 7px; border-radius: 5px; background: #e7f7ef; color: var(--green-dark); text-transform: uppercase; font-size: 8px; font-weight: 800; letter-spacing: .09em; }
.resource-badge.independent { background: #f1f3f5; color: #77808b; }
.resource-card h3 { margin: 20px 0 10px; font-size: 20px; letter-spacing: -.04em; }
.resource-card p { color: #78818b; font-size: 12px; line-height: 1.65; }
.resource-card strong { display: block; margin-top: 20px; color: var(--green-dark); font-size: 11px; }
.resource-note { max-width: 790px; margin: 25px auto 0; color: #969da5; text-align: center; font-size: 10px; line-height: 1.6; }

.video-section { padding: 120px 0; background: var(--ink); color: white; }
.video-heading { align-items: center; }
.video-heading .section-kicker { color: #6bd2ab; }
.video-heading .section-description { color: #afb6c0; margin-bottom: 18px; }
.featured-video { display: grid; grid-template-columns: 62% 38%; overflow: hidden; border: 1px solid #343a48; border-radius: 18px; background: #202634; }
.video-frame { aspect-ratio: 16 / 9; background: #0f1219; }
.video-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.featured-video-copy { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.featured-video-copy h3 { margin: 20px 0 12px; font-size: 30px; }
.featured-video-copy p { color: #aeb6c1; font-size: 13px; line-height: 1.7; }
.featured-video-copy a { margin-top: 16px; color: #74d8b2; font-size: 12px; font-weight: 700; }
.video-card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 18px; }
.video-card { overflow: hidden; border: 1px solid #343a48; border-radius: 12px; background: #202634; transition: transform .2s, border-color .2s; }
.video-card:hover { transform: translateY(-4px); border-color: #596174; }
.video-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; opacity: .85; }
.video-card span { display: block; margin: 15px 16px 6px; color: #72d4ae; text-transform: uppercase; font-size: 8px; font-weight: 800; letter-spacing: .09em; }
.video-card h3 { margin: 0 16px 17px; font-size: 15px; letter-spacing: -.025em; }

.learning-section { background: #f5f7f6; padding: 120px 0; }
.learning-heading { text-align: center; max-width: 620px; margin: 0 auto 70px; }
.learning-heading p:last-child { color: var(--muted); margin: 20px auto 0; max-width: 450px; line-height: 1.65; }
.feature-showcase { display: grid; grid-template-columns: 40% 60%; align-items: center; max-width: 1030px; margin: 0 auto; }
.feature-list { padding-right: 65px; }
.feature-item { width: 100%; display: flex; gap: 18px; text-align: left; border: 0; border-top: 1px solid #dde2e1; padding: 23px 0; background: transparent; color: #9aa19f; }
.feature-item:last-child { border-bottom: 1px solid #dde2e1; }
.feature-item.active { color: var(--ink); }
.feature-number { font-size: 11px; font-weight: 800; padding-top: 3px; }
.feature-item strong { display: block; font-family: "Manrope"; font-size: 17px; letter-spacing: -.025em; }
.feature-item small { display: block; margin-top: 6px; color: #8b9391; font-size: 12px; }
.feature-stage { height: 460px; position: relative; overflow: hidden; background: white; border: 1px solid #e0e5e3; border-radius: 18px; box-shadow: 0 22px 50px rgba(32,47,41,.08); }
.stage-label { position: absolute; top: 20px; left: 22px; color: #9aa2a0; text-transform: uppercase; font-size: 9px; font-weight: 800; letter-spacing: .12em; }
.pendulum-demo { position: absolute; top: 55px; left: 0; right: 0; height: 260px; background: radial-gradient(circle at 50% 0%, #f2f8f5, transparent 65%); }
.pendulum-anchor { position: absolute; left: 50%; top: 20px; width: 14px; height: 14px; border-radius: 50%; transform: translateX(-50%); background: var(--ink); }
.pendulum-line { position: absolute; left: 50%; top: 32px; width: 2px; height: 167px; background: #8c9498; transform-origin: top; transform: rotate(25deg); }
.pendulum-ball { position: absolute; left: calc(50% + 64px); top: 178px; width: 51px; height: 51px; border-radius: 50%; background: var(--green); box-shadow: inset -8px -6px 0 rgba(0,0,0,.09), 0 10px 18px rgba(25,169,116,.2); }
.angle-arc { position: absolute; left: calc(50% - 1px); top: 40px; width: 64px; height: 64px; border-top: 1px dashed #b7bebc; border-right: 1px dashed #b7bebc; border-radius: 0 100% 0 0; }
.angle-label { position: absolute; left: calc(50% + 40px); top: 80px; color: #9da5a3; font-size: 11px; }
.force-arrow { position: absolute; left: calc(50% + 89px); top: 229px; width: 2px; height: 52px; background: #f5a623; }
.force-arrow::after { content: ""; position: absolute; left: -4px; bottom: -2px; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 7px solid #f5a623; }
.force-label { position: absolute; left: calc(50% + 103px); top: 256px; color: #be8a35; font-size: 10px; }
.stage-question { position: absolute; left: 25px; right: 25px; bottom: 25px; padding: 17px; border-radius: 11px; background: #f7f9f8; }
.stage-question p { margin-bottom: 12px; font-size: 12px; font-weight: 700; }
.stage-question div { display: flex; gap: 7px; }
.choice { padding: 7px 10px; border: 1px solid #dfe4e2; border-radius: 6px; background: white; color: #7b8381; font-size: 10px; }
.choice.active { border-color: var(--green); color: var(--green-dark); background: #effaf5; }

.dashboard-section { padding-top: 130px; padding-bottom: 140px; display: grid; grid-template-columns: 36% 64%; align-items: center; gap: 40px; }
.dashboard-copy > p:not(.section-kicker) { max-width: 350px; margin: 22px 0; color: var(--muted); line-height: 1.7; font-size: 14px; }
.check-list { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 13px; color: #535c69; font-size: 13px; }
.check-list span { width: 20px; height: 20px; display: inline-grid; place-items: center; margin-right: 9px; border-radius: 50%; background: #eaf8f2; color: var(--green); font-size: 10px; font-weight: 800; }
.dashboard-frame { display: flex; height: 470px; overflow: hidden; border: 1px solid #e2e6e7; border-radius: 16px; background: #f5f7f7; box-shadow: var(--shadow); }
.dashboard-sidebar { width: 54px; background: white; border-right: 1px solid #e7eaea; padding: 16px 0; display: flex; flex-direction: column; align-items: center; gap: 17px; }
.mini-brand { width: 22px; height: 23px; display: flex; align-items: end; gap: 2px; margin-bottom: 15px; }
.mini-brand i { width: 5px; border-radius: 3px 3px 1px 1px; background: var(--ink); }
.mini-brand i:first-child { height: 10px; }.mini-brand i:nth-child(2) { height: 18px; background: var(--green); }.mini-brand i:last-child { height: 14px; }
.side-icon { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 7px; color: #a3abb3; font-size: 13px; }
.side-icon.active { background: #ecf8f3; color: var(--green); }
.side-bottom { margin-top: auto; border: 1px solid #e6e9ea; border-radius: 50%; }
.dashboard-main { padding: 24px 26px; flex: 1; min-width: 0; }
.dashboard-top { display: flex; align-items: center; justify-content: space-between; }
.dashboard-top small { color: #9da4ac; font-size: 9px; }
.dashboard-top h3 { margin: 4px 0 0; font-size: 18px; letter-spacing: -.03em; }
.avatar { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: #efb184; color: white; font-size: 9px; font-weight: 800; }
.today-card { height: 165px; margin-top: 20px; border-radius: 12px; background: #ecf8f3; overflow: hidden; display: grid; grid-template-columns: 55% 45%; }
.today-card > div:first-child { padding: 21px 23px; }
.today-tag { color: var(--green-dark); font-size: 8px; font-weight: 800; letter-spacing: .12em; }
.today-card h4 { margin: 8px 0 3px; font-family: "Manrope"; font-size: 18px; line-height: 1.15; letter-spacing: -.04em; }
.today-card p { color: #81918a; font-size: 9px; }
.today-card button { border: 0; border-radius: 6px; background: var(--green); color: white; padding: 7px 10px; font-size: 9px; font-weight: 700; }
.today-illustration { position: relative; }
.tile { position: absolute; width: 47px; height: 47px; display: grid; place-items: center; border-radius: 9px; color: white; font-family: "Manrope"; font-weight: 800; box-shadow: 0 8px 13px rgba(0,0,0,.08); }
.tile-a { top: 28px; left: 35px; background: #47be92; transform: rotate(-8deg); }
.tile-b { top: 37px; right: 45px; background: #ffcc54; transform: rotate(8deg); }
.tile-c { bottom: 28px; left: 84px; background: #6b91ef; transform: rotate(5deg); }
.tile-d { bottom: 18px; right: 25px; background: #9c7dea; transform: rotate(-5deg); }
.dashboard-row { display: grid; grid-template-columns: 58% 42%; gap: 12px; margin-top: 13px; }
.progress-panel, .streak-panel { min-width: 0; border: 1px solid #e3e7e8; border-radius: 10px; background: white; padding: 14px; }
.panel-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 13px; }
.panel-title h4 { margin: 0; font-size: 11px; }
.panel-title span { color: var(--green); font-size: 8px; font-weight: 700; }
.progress-item { display: grid; grid-template-columns: 8px 72px 1fr 23px; align-items: center; gap: 6px; margin: 11px 0; }
.subject-dot { width: 6px; height: 6px; border-radius: 50%; }
.dot-maths { background: var(--green); }.dot-bio { background: var(--blue); }.dot-chem { background: #f2b449; }
.progress-item strong { display: block; font-size: 8px; }
.progress-item small { display: block; color: #a2a9b0; font-size: 6px; margin-top: 1px; }
.bar-line { height: 3px; border-radius: 4px; background: #eef1f1; overflow: hidden; }
.bar-line i { display: block; height: 100%; background: var(--green); }
.progress-item b { text-align: right; font-size: 7px; }
.week-row, .week-dots { display: grid; grid-template-columns: repeat(7, 1fr); text-align: center; gap: 3px; }
.week-row span { color: #a1a8ae; font-size: 7px; }
.week-dots { margin-top: 6px; }
.week-dots i { width: 17px; height: 17px; display: grid; place-items: center; margin: auto; border-radius: 50%; background: #f0f2f2; color: white; font-style: normal; font-size: 7px; }
.week-dots .done { background: var(--green); }.week-dots .today { background: #fff5da; color: #be8424; border: 1px solid #f4c05e; }
.streak-panel p { margin: 16px 0 0; padding-top: 12px; border-top: 1px solid #eef0f1; color: #a1a8af; font-size: 7px; line-height: 1.6; }
.streak-panel p strong { color: #626b75; }

.testimonial-section { padding: 120px 0; background: var(--cream); text-align: center; }
.testimonial-grid { margin-top: 55px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; text-align: left; }
blockquote { margin: 0; padding: 25px; min-height: 230px; border: 1px solid #e2e0d8; border-radius: 14px; background: white; }
.quote-icon { color: var(--green); font-family: Georgia; font-size: 35px; line-height: .5; }
blockquote p { min-height: 100px; margin: 17px 0 23px; color: #515965; font-size: 13px; line-height: 1.7; }
blockquote footer { display: flex; align-items: center; gap: 10px; }
.testimonial-avatar { width: 31px; height: 31px; border-radius: 50%; display: grid; place-items: center; color: white; font-size: 8px; font-weight: 800; }
.avatar-one { background: #d68962; }.avatar-two { background: #617cb9; }.avatar-three { background: #b56d9f; }
blockquote footer strong, blockquote footer small { display: block; }
blockquote footer strong { font-size: 10px; }
blockquote footer small { color: #a0a6ad; font-size: 8px; margin-top: 2px; }

.teacher-section { padding-top: 120px; padding-bottom: 60px; }
.teacher-card { min-height: 410px; display: grid; grid-template-columns: 48% 52%; overflow: hidden; border-radius: 20px; background: var(--ink); color: white; }
.teacher-copy { padding: 70px 70px; }
.teacher-copy .section-kicker { color: #69d3ab; }
.teacher-copy p:not(.section-kicker) { max-width: 370px; margin: 22px 0 28px; color: #b1b7c0; line-height: 1.7; font-size: 14px; }
.teacher-art { position: relative; background: radial-gradient(circle at 50% 45%, #29344b, #171b27 65%); }
.insight-card { position: absolute; padding: 17px 18px; border-radius: 12px; background: white; color: var(--ink); box-shadow: 0 18px 35px rgba(0,0,0,.2); }
.insight-card span, .insight-card small { display: block; color: #9ba2ab; font-size: 9px; }
.insight-card strong { display: block; margin: 8px 0 6px; font-family: "Manrope"; font-size: 20px; letter-spacing: -.04em; }
.insight-card i { display: block; width: 125px; height: 5px; overflow: hidden; border-radius: 4px; background: #edf0f1; }
.insight-card i b { display: block; height: 100%; border-radius: inherit; background: var(--green); }
.insight-one { width: 190px; left: 52px; top: 73px; transform: rotate(-3deg); }
.insight-two { width: 190px; right: 46px; top: 140px; transform: rotate(4deg); }
.insight-two strong { color: #d66b6b; font-size: 14px; }
.insight-three { width: 155px; left: 102px; bottom: 53px; transform: rotate(2deg); }
.insight-three strong { color: var(--green); }
.demo-booking-card .insight-card strong { font-size: 14px; }
.demo-booking-card .insight-two strong { color: var(--green-dark); }
.demo-booking-card .insight-three { width: 180px; }

.final-cta { position: relative; overflow: hidden; padding-top: 130px; padding-bottom: 140px; text-align: center; }
.final-cta > *:not(.cta-orb) { position: relative; z-index: 2; }
.final-cta h2 { margin-bottom: 18px; }
.final-cta p:not(.section-kicker) { color: var(--muted); margin-bottom: 28px; }
.cta-orb { position: absolute; border-radius: 50%; opacity: .5; filter: blur(1px); }
.orb-left { width: 240px; height: 240px; left: -130px; top: 85px; background: #e9f8f2; }
.orb-right { width: 190px; height: 190px; right: -60px; bottom: 55px; background: #fff3cf; }

.site-footer { padding: 62px max(24px, calc((100vw - 1132px) / 2)) 24px; background: #f7f8f8; }
.footer-top { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 60px; padding-bottom: 50px; }
.footer-brand p { max-width: 270px; margin-top: 18px; color: #8b929c; font-size: 12px; line-height: 1.7; }
.footer-links { display: grid; align-content: start; gap: 11px; }
.footer-links h4 { margin-bottom: 6px; font-size: 12px; }
.footer-links a { color: #8b929c; font-size: 11px; }
.footer-links a:hover { color: var(--ink); }
.footer-bottom { padding-top: 19px; border-top: 1px solid #e1e5e6; display: flex; justify-content: space-between; color: #a1a7ae; font-size: 9px; }
.floating-demo { position: fixed; z-index: 20; right: 22px; bottom: 22px; min-height: 44px; padding: 0 15px; display: inline-flex; align-items: center; gap: 9px; border-radius: 30px; background: var(--green); color: white; box-shadow: 0 12px 28px rgba(25,169,116,.3); font-size: 12px; font-weight: 800; transition: transform .2s, background .2s; }
.floating-demo:hover { transform: translateY(-3px); background: var(--green-dark); }

.play-icon { font-size: 10px; }
.visual-hero { padding-bottom: 65px; }
.visual-stage { height: 570px; display: block; padding: 35px; }
.visual-stage canvas { width: 100%; height: 100%; border: 1px solid #e2e6e8; border-radius: 20px; background: #fbfcfc; box-shadow: var(--shadow); }
.visual-stage-toolbar { position: absolute; z-index: 4; top: 55px; left: 55px; right: 55px; display: flex; align-items: center; justify-content: space-between; }
.visual-stage-toolbar span { color: #8b939d; font-size: 9px; font-weight: 800; letter-spacing: .12em; }
.visual-stage-toolbar button { border: 1px solid #dfe4e7; border-radius: 999px; background: white; padding: 7px 13px; font-size: 10px; font-weight: 800; }
.visual-stage .card-grade { right: -5px; top: 105px; width: 145px; }
.visual-stage .card-grade strong { font-size: 18px; }

.library-section { padding-top: 120px; padding-bottom: 130px; }
.library-toolbar { margin-bottom: 30px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.search-box { min-width: 330px; height: 46px; padding: 0 16px; display: flex; align-items: center; gap: 10px; border: 1px solid #dfe4e7; border-radius: 12px; background: white; }
.search-box span { color: #89919c; font-size: 20px; }
.search-box input { width: 100%; border: 0; outline: 0; color: var(--ink); font: inherit; font-size: 13px; }
.filter-tabs { display: flex; gap: 7px; overflow-x: auto; }
.filter-tab { white-space: nowrap; border: 1px solid #dfe4e7; border-radius: 999px; background: white; padding: 9px 13px; color: #687080; font-size: 11px; font-weight: 800; }
.filter-tab.active { border-color: var(--ink); background: var(--ink); color: white; }
.animation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.animation-card { min-width: 0; overflow: hidden; border: 1px solid #e1e6e8; border-radius: 17px; background: white; transition: transform .25s, box-shadow .25s; }
.animation-card:hover { transform: translateY(-5px); box-shadow: 0 18px 38px rgba(25,31,43,.1); }
.animation-card[hidden] { display: none; }
.animation-thumb { height: 190px; position: relative; overflow: hidden; background: #edf8f4; }
.animation-card-body { padding: 20px; }
.card-label-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #8b939e; text-transform: uppercase; font-size: 8px; font-weight: 800; letter-spacing: .1em; }
.card-label-row b { padding: 5px 7px; border-radius: 20px; background: #eaf8f2; color: var(--green-dark); font-size: 7px; }
.animation-card h3 { margin: 17px 0 8px; font-size: 22px; }
.animation-card p { min-height: 58px; color: #757e89; font-size: 12px; line-height: 1.65; }
.animation-card button { width: 100%; min-height: 42px; margin-top: 10px; border: 1px solid #dfe4e7; border-radius: 9px; background: white; color: var(--ink); font-weight: 800; font-size: 11px; display: flex; align-items: center; justify-content: space-between; padding: 0 13px; }
.animation-card button:hover:not(:disabled) { border-color: var(--green); color: var(--green-dark); }
.animation-card button:disabled { cursor: default; color: #a0a7b0; background: #f8f9f9; }
.coming-card { opacity: .82; }
.coming-card .card-label-row b { background: #f2f0ff; color: #7258d6; }
.empty-state { padding: 80px 20px; text-align: center; color: #8b929d; }

.projectile-thumb { background: linear-gradient(#eef9f5 70%, #e1ecdf 70%); }
.ground-line { position: absolute; left: 0; right: 0; bottom: 55px; height: 2px; background: #9fc4ad; }
.trajectory-path { position: absolute; left: 38px; bottom: 55px; width: 230px; height: 105px; border-top: 3px dashed #19a974; border-radius: 50% 50% 0 0; transform: rotate(-7deg); }
.trajectory-dot { position: absolute; z-index: 2; left: 177px; top: 45px; width: 20px; height: 20px; border-radius: 50%; background: #4b87ff; box-shadow: 0 8px 18px rgba(75,135,255,.3); }
.pendulum-thumb { background: #f3f0ff; }
.pendulum-top { position: absolute; left: 50%; top: 25px; width: 95px; height: 7px; border-radius: 4px; background: #302c40; transform: translateX(-50%); }
.pendulum-string { position: absolute; left: 50%; top: 31px; width: 3px; height: 105px; background: #8b84a7; transform-origin: top; transform: rotate(22deg); }
.pendulum-weight { position: absolute; left: calc(50% + 37px); top: 125px; width: 42px; height: 42px; border-radius: 50%; background: #8c6cff; }
.wave-thumb { background: #eff5ff; display: grid; place-items: center; }
.wave-thumb span { position: absolute; left: 20px; right: 20px; height: 70px; border-top: 3px solid #4b87ff; border-radius: 50%; }
.wave-thumb span:nth-child(2) { transform: scaleY(-1); border-color: #8c6cff; opacity: .7; }
.wave-thumb span:nth-child(3) { width: 250px; border-color: #19a974; transform: translateY(30px); }
.vector-thumb { background: #f7f7fb; }
.axis { position: absolute; left: 50%; top: 50%; height: 3px; width: 125px; transform-origin: left; }
.axis-x { background: #e45858; transform: rotate(-10deg); }.axis-y { background: #19a974; transform: rotate(-90deg); }.axis-z { background: #4b87ff; transform: rotate(38deg); }
.vector-arrow { position: absolute; left: 50%; top: 50%; width: 155px; height: 5px; background: #171b27; transform-origin: left; transform: rotate(-48deg); border-radius: 5px; }
.function-thumb { background: #fafbfb; }
.function-grid { position: absolute; inset: 0; background-image: linear-gradient(#e8ecee 1px, transparent 1px), linear-gradient(90deg,#e8ecee 1px,transparent 1px); background-size: 28px 28px; }
.function-curve { position: absolute; left: 75px; bottom: -38px; width: 180px; height: 190px; border: 4px solid #19a974; border-bottom: 0; border-radius: 50% 50% 0 0; }
.circle-thumb { background: #fff8e7; }
.unit-circle { position: absolute; left: 50%; top: 50%; width: 130px; height: 130px; border: 3px solid #e2a931; border-radius: 50%; transform: translate(-50%,-50%); }
.circle-radius { position: absolute; left: 50%; top: 50%; width: 65px; height: 3px; background: #171b27; transform-origin: left; transform: rotate(-36deg); }
.circle-point { position: absolute; left: calc(50% + 48px); top: calc(50% - 43px); width: 15px; height: 15px; border-radius: 50%; background: #4b87ff; }
.coming-thumb { background: #f3f7f5; display: flex; align-items: center; justify-content: center; gap: 50px; color: #19a974; font: 800 34px "Manrope"; }
.coming-thumb i { position: absolute; width: 165px; height: 90px; border-top: 2px dashed #9ccbb8; border-radius: 50%; }
.optics-thumb { background: #eff6ff; }
.optics-thumb span { position:absolute;left:55px;top:55px;width:10px;height:85px;background:#ffd85a;box-shadow:0 0 30px #ffd85a; }
.optics-thumb i { position:absolute;left:50%;top:30px;width:15px;height:130px;border-radius:50%;background:#83a6ff;transform:translateX(-50%); }
.optics-thumb b { position:absolute;right:45px;top:75px;width:90px;height:3px;background:#4b87ff;transform:rotate(-18deg); }
.surface-thumb { background: linear-gradient(135deg,#f2efff,#eaf8f2); }
.surface-thumb span { position:absolute;inset:30px;background:repeating-radial-gradient(ellipse at center,#8c6cff 0 2px,transparent 3px 18px);transform:skew(-15deg) rotate(-8deg); }

.subject-directory { padding: 115px 0; background: #101521; color: white; }
.subject-directory .section-kicker { color: #75dab4; }
.subject-directory .section-description { color: #a1aab7; }
.maths-directory { background: #f7f5ef; color: var(--ink); }
.maths-directory .section-kicker { color: var(--green-dark); }
.maths-directory .section-description { color: var(--muted); }
.directory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.directory-grid article { padding: 25px; min-height: 265px; border: 1px solid #303947; border-radius: 15px; background: rgba(255,255,255,.04); }
.maths-directory .directory-grid article { border-color: #e0ded8; background: white; }
.directory-grid article > span { color: #75dab4; font-size: 9px; font-weight: 800; }
.maths-directory .directory-grid article > span { color: var(--green); }
.directory-grid h3 { margin: 22px 0 10px; font-size: 20px; }
.directory-grid p { min-height: 75px; color: #9ba5b4; font-size: 11px; line-height: 1.65; }
.maths-directory .directory-grid p { color: #7a828c; }
.directory-grid article div { display: flex; flex-wrap: wrap; gap: 5px; }
.directory-grid b { padding: 6px 8px; border: 1px solid #394454; border-radius: 999px; color: #c6cdd6; font-size: 8px; }
.maths-directory .directory-grid b { border-color: #e1e4e5; color: #727a84; }

.roadmap-section { padding-top: 120px; padding-bottom: 120px; }
.roadmap-card { padding: 65px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; border-radius: 22px; background: var(--ink); color: white; }
.roadmap-card .section-kicker { color: #75dab4; }
.roadmap-card h2 { margin: 0 0 20px; font-size: clamp(38px,4vw,55px); line-height: 1.08; }
.roadmap-card p:not(.section-kicker) { color: #adb5c0; line-height: 1.7; font-size: 13px; }
.roadmap-card ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.roadmap-card li { padding: 17px; display: flex; gap: 12px; border: 1px solid #343d4b; border-radius: 12px; background: #1d2330; }
.roadmap-card li > span { color: #75dab4; font-size: 9px; font-weight: 800; }
.roadmap-card strong,.roadmap-card small { display: block; }.roadmap-card strong{font-size:11px;margin-bottom:5px}.roadmap-card small{color:#8f99a8;font-size:9px;line-height:1.5}

.sim-modal { width: min(1180px, calc(100vw - 28px)); max-width: none; padding: 0; border: 0; border-radius: 20px; background: white; box-shadow: 0 30px 100px rgba(0,0,0,.3); }
.sim-modal::backdrop { background: rgba(13,17,25,.74); backdrop-filter: blur(5px); }
.sim-shell > header { min-height: 78px; padding: 16px 22px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #e7eaec; }
.sim-shell header span { color: var(--green-dark); text-transform: uppercase; font-size: 8px; font-weight: 800; letter-spacing: .12em; }
.sim-shell header h2 { margin: 5px 0 0; font-size: 24px; }
.sim-shell header button { width: 38px; height: 38px; border: 1px solid #e0e4e6; border-radius: 50%; background: white; color: var(--ink); font-size: 23px; }
.sim-workspace { display: grid; grid-template-columns: 1fr 260px; min-height: 520px; }
.sim-workspace canvas { width: 100%; height: 520px; background: #fbfcfc; }
.sim-workspace aside { padding: 24px; border-left: 1px solid #e6eaeb; background: #f8f9f9; }
.control-intro span { color: var(--green-dark); font-size: 8px; font-weight: 800; letter-spacing: .12em; }
.control-intro p { color: #8c949e; font-size: 10px; line-height: 1.5; }
.control-row { display: block; margin-top: 26px; }
.control-row > span { margin-bottom: 10px; display: flex; justify-content: space-between; gap: 12px; font-size: 10px; }
.control-row output { color: var(--green-dark); font-weight: 800; }
.control-row input { width: 100%; accent-color: var(--green); }
.sim-shell > footer { padding: 15px 22px; display: flex; align-items: center; gap: 10px; border-top: 1px solid #e7eaec; }
.sim-shell footer div { margin-right: auto; }.sim-shell footer strong{font-size:10px}.sim-shell footer p{margin:3px 0 0;color:#8b939d;font-size:9px}
.sim-shell footer button { min-width: 80px; min-height: 38px; border: 1px solid #dfe4e7; border-radius: 8px; background: white; font-weight: 800; font-size: 10px; }
.sim-shell footer button:first-of-type { border-color: var(--green); background: var(--green); color: white; }

@media (max-width: 980px) {
  .main-nav { display: none; position: absolute; top: 68px; left: 24px; right: 24px; padding: 18px; border: 1px solid #e5e8e9; border-radius: 12px; background: white; box-shadow: var(--shadow); }
  .main-nav.open { display: grid; gap: 16px; }
  .header-actions { display: none; }
  .menu-button { display: block; }
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 70px; }
  .hero-intro, .hero-copy { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-proof { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .subject-grid { grid-template-columns: repeat(2, 1fr); }
  .qualification-grid { grid-template-columns: repeat(3, 1fr); }
  .resource-grid { grid-template-columns: repeat(2, 1fr); }
  .video-card-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-showcase { grid-template-columns: 1fr; gap: 35px; }
  .feature-list { padding-right: 0; }
  .dashboard-section { grid-template-columns: 1fr; }
  .dashboard-copy { text-align: center; }
  .dashboard-copy > p:not(.section-kicker) { margin-left: auto; margin-right: auto; }
  .check-list { max-width: 340px; margin-left: auto; margin-right: auto; text-align: left; }
  .teacher-card { grid-template-columns: 1fr; }
  .teacher-art { height: 330px; }
  .animation-grid { grid-template-columns: repeat(2, 1fr); }
  .directory-grid { grid-template-columns: repeat(2, 1fr); }
  .roadmap-card { grid-template-columns: 1fr; }
  .sim-workspace { grid-template-columns: 1fr; }
  .sim-workspace aside { border-left: 0; border-top: 1px solid #e6eaeb; display: grid; grid-template-columns: repeat(3,1fr); gap: 15px; }
  .control-row { margin-top: 0; }
}

@media (max-width: 680px) {
  .site-header { height: 66px; padding: 0 18px; }
  .network-switcher-inner { padding: 0 18px; }
  .network-switcher span { display: none; }
  .section-shell { padding-left: 18px; padding-right: 18px; }
  .hero { padding-top: 45px; padding-bottom: 55px; }
  .hero h1 { font-size: 46px; }
  .hero-intro { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-visual { height: 440px; transform: scale(.76); margin: -5px -100px -55px; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); gap: 0; padding: 18px; }
  .stat-strip div { padding: 15px 5px; }
  .stat-strip div:nth-child(2) { border-right: 0; }
  .subjects, .qualification-section, .learning-section, .testimonial-section, .resource-section, .video-section { padding-top: 80px; padding-bottom: 80px; }
  .section-heading { display: block; }
  .section-description { margin-top: 22px; }
  .subject-grid { grid-template-columns: 1fr; }
  .qualification-grid { grid-template-columns: 1fr; }
  .focused-subject-grid .subject-art { height: 190px; }
  .focused-subject-grid .cube { left: 55px; top: 58px; }
  .focused-subject-grid .cone { right: 55px; top: 48px; }
  .focused-subject-grid .sphere { right: 130px; }
  .syllabus-section { padding: 80px 0; }
  .syllabus-grid, .resource-grid, .featured-video, .video-card-grid { grid-template-columns: 1fr; }
  .syllabus-links { align-items: flex-start; flex-direction: column; }
  .topic-chips { min-height: 0; }
  .featured-video-copy { padding: 26px; }
  .subject-art { height: 170px; }
  .subject-content p { min-height: 0; }
  .feature-stage { height: 420px; }
  .dashboard-section { padding-top: 80px; padding-bottom: 80px; overflow: hidden; }
  .dashboard-frame { width: 690px; transform: scale(.62); transform-origin: left top; margin-bottom: -180px; }
  .testimonial-grid { grid-template-columns: 1fr; }
  blockquote { min-height: 0; }
  blockquote p { min-height: 0; }
  .teacher-section { padding: 70px 18px 30px; }
  .teacher-copy { padding: 48px 27px; }
  .teacher-art { height: 300px; }
  .insight-one { left: 20px; }
  .insight-two { right: 16px; top: 120px; }
  .insight-three { left: 62px; bottom: 25px; }
  .final-cta { padding-top: 90px; padding-bottom: 100px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 35px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { display: grid; gap: 8px; }
  .floating-demo { right: 14px; bottom: 14px; }
  .visual-stage { height: 430px; transform: none; margin: 20px -18px -15px; padding: 18px; }
  .visual-stage-toolbar { top: 35px; left: 35px; right: 35px; }
  .visual-stage .floating-card { display: none; }
  .library-section { padding-top: 80px; padding-bottom: 80px; }
  .library-toolbar { display: grid; }
  .search-box { min-width: 0; width: 100%; }
  .animation-grid,.directory-grid { grid-template-columns: 1fr; }
  .roadmap-card { padding: 30px 22px; gap: 35px; }
  .roadmap-card ol { grid-template-columns: 1fr; }
  .sim-modal { width: calc(100vw - 12px); }
  .sim-workspace canvas { height: 360px; }
  .sim-workspace aside { grid-template-columns: 1fr; }
  .sim-shell > footer { align-items: flex-end; flex-wrap: wrap; }
  .sim-shell footer div { width: 100%; }
}