@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --ink: #19111f;
  --muted: #695f70;
  --cream: #fbf8ff;
  --white: #ffffff;
  --purple: #6d28d9;
  --purple-dark: #3b126f;
  --purple-mid: #8b5cf6;
  --lavender: #ede5ff;
  --lavender-soft: #f6f1ff;
  --lilac: #d8c3ff;
  --yellow: #f7df62;
  --pink: #f1c8ff;
  --border: rgba(59, 18, 111, 0.15);
  --shadow: 0 22px 60px rgba(65, 25, 115, 0.12);
  --radius: 28px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 5%, rgba(216,195,255,.38), transparent 24rem),
    radial-gradient(circle at 95% 22%, rgba(241,200,255,.35), transparent 24rem),
    var(--cream);
  font-family: "DM Sans", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

button, input, select { font: inherit; }

a { color: inherit; }

.page-glow {
  position: fixed;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
  opacity: .35;
}
.glow-one { background: #c4a7ff; top: 10%; left: -180px; }
.glow-two { background: #f0bcff; right: -200px; top: 50%; }

.site-header {
  width: min(1180px, calc(100% - 32px));
  margin: 18px auto 0;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: sticky;
  top: 14px;
  z-index: 50;
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 22px;
  background: rgba(255,255,255,.78);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 35px rgba(67, 35, 99, .08);
}

.brand {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-image-wrap {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--purple-dark);
}
.brand-image {
  width: 34px;
  height: 34px;
  object-fit: contain;
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.08; }
.brand-copy strong { font-family: "Space Grotesk", sans-serif; font-size: 1rem; }
.brand-copy small { color: var(--muted); font-size: .72rem; margin-top: 4px; }

nav { display: flex; align-items: center; gap: 20px; }
nav a {
  text-decoration: none;
  font-size: .88rem;
  font-weight: 600;
  color: #4f4358;
}
nav a:hover { color: var(--purple); }
.nav-home {
  padding: 9px 13px;
  border-radius: 999px;
  background: var(--lavender);
  color: var(--purple-dark) !important;
}
.mobile-menu {
  display: none;
  border: 0;
  background: var(--lavender);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
}

main { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }

.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  align-items: center;
  gap: 42px;
  padding: 76px 0 58px;
}
.eyebrow {
  margin: 0 0 10px;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--purple);
}
.hero h1, .section-heading h2, .worksheet-copy h2, .brain-card h2 {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -.045em;
}
.hero h1 {
  margin: 0;
  font-size: clamp(3.5rem, 7vw, 6.7rem);
  line-height: .92;
}
.hero h1 em {
  color: var(--purple);
  font-style: normal;
}
.hero-lead {
  max-width: 660px;
  margin: 24px 0;
  font-size: 1.13rem;
  color: var(--muted);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0; }
.primary-button, .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 13px 18px;
  border-radius: 14px;
  font-weight: 800;
}
.primary-button { background: var(--purple); color: white; box-shadow: 0 12px 30px rgba(109,40,217,.24); }
.secondary-button { background: white; border: 1px solid var(--border); color: var(--purple-dark); }

.hero-note {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  max-width: 570px;
  background: #fff;
  border: 1px solid var(--border);
  padding: 15px 17px;
  border-radius: 18px;
  box-shadow: 0 12px 35px rgba(69, 34, 105, .08);
}
.hero-note p { margin: 0; }
.spark { color: var(--purple); font-size: 1.25rem; }

.hero-visual {
  min-height: 520px;
  position: relative;
  display: grid;
  place-items: center;
}
.orbit {
  position: absolute;
  border: 1px dashed rgba(109,40,217,.35);
  border-radius: 50%;
  animation: spin 18s linear infinite;
}
.orbit-one { width: 430px; height: 430px; }
.orbit-two { width: 560px; height: 360px; transform: rotate(-18deg); animation-duration: 27s; }
.planet {
  width: 260px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 28% 22%, #aa86ff, transparent 16%),
    linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: #fff;
  display: grid;
  place-content: center;
  text-align: center;
  box-shadow: 0 30px 70px rgba(73, 28, 132, .32);
}
.planet span { font-size: .78rem; letter-spacing: .2em; }
.planet strong { font: 700 2.4rem/1 "Space Grotesk", sans-serif; }
.planet small { margin-top: 8px; opacity: .82; }

.mini-card {
  position: absolute;
  background: white;
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: 14px;
  font-weight: 800;
  box-shadow: var(--shadow);
}
.card-maths { top: 13%; left: 4%; transform: rotate(-8deg); }
.card-science { top: 6%; right: 6%; transform: rotate(7deg); }
.card-humanities { bottom: 17%; left: 2%; transform: rotate(5deg); }
.card-english { bottom: 4%; right: 13%; transform: rotate(-5deg); }
.card-tech { top: 47%; right: -2%; transform: rotate(8deg); }

.quick-dock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 10px;
  margin-bottom: 70px;
  border-radius: 22px;
  background: var(--purple-dark);
  color: white;
}
.quick-dock a {
  text-decoration: none;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  padding: 16px 12px;
  border-radius: 15px;
  font-weight: 700;
}
.quick-dock a:hover { background: rgba(255,255,255,.1); }
.quick-dock span { color: #d8c3ff; }

.section { padding: 82px 0; }
.section-heading {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: end;
  gap: 42px;
  margin-bottom: 32px;
}
.section-heading h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4.5vw, 4.1rem);
  line-height: 1;
}
.section-heading > p { margin: 0; color: var(--muted); max-width: 520px; }
.section-heading.light h2,
.section-heading.light > p { color: white; }
.section-heading.light .eyebrow { color: #d8c3ff; }

.year-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.year-tabs button {
  border: 1px solid var(--border);
  background: white;
  color: var(--purple-dark);
  padding: 10px 15px;
  border-radius: 999px;
  font-weight: 800;
  cursor: pointer;
}
.year-tabs button[aria-selected="true"] {
  background: var(--purple);
  color: white;
  border-color: var(--purple);
}
.year-panel {
  min-height: 315px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 18px;
  padding: 26px;
  border-radius: var(--radius);
  background: white;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.year-number {
  min-height: 255px;
  border-radius: 22px;
  background: linear-gradient(150deg, var(--purple), var(--purple-dark));
  color: white;
  display: grid;
  place-content: center;
  text-align: center;
}
.year-number span { font-size: .8rem; text-transform: uppercase; letter-spacing: .14em; }
.year-number strong { font: 700 6rem/1 "Space Grotesk", sans-serif; }
.year-info h3 { margin: 0 0 10px; font: 700 2rem "Space Grotesk", sans-serif; }
.year-info > p { color: var(--muted); }
.year-focus {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 18px;
}
.focus-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  background: var(--lavender-soft);
}
.focus-item strong { display: block; margin-bottom: 3px; color: var(--purple-dark); }
.focus-item span { font-size: .89rem; color: var(--muted); }

.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.subject-card {
  min-height: 330px;
  padding: 24px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: white;
  box-shadow: 0 16px 40px rgba(73, 28, 132, .07);
  transition: .25s ease;
}
.subject-card:hover { transform: translateY(-7px) rotate(-.4deg); box-shadow: var(--shadow); }
.subject-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: var(--lavender);
  color: var(--purple);
  display: grid;
  place-items: center;
  font: 700 1.5rem "Space Grotesk", sans-serif;
  margin-bottom: 22px;
}
.subject-label {
  margin: 0;
  color: var(--purple);
  font-size: .72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.subject-card h3 { font: 700 1.7rem "Space Grotesk", sans-serif; margin: 5px 0 10px; }
.subject-card p:not(.subject-label) { color: var(--muted); }
.subject-open {
  border: 0;
  background: none;
  padding: 0;
  color: var(--purple);
  font-weight: 800;
  cursor: pointer;
}

.worksheet-lab {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 38px;
  align-items: start;
}
.worksheet-copy {
  position: sticky;
  top: 110px;
}
.worksheet-copy h2 {
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  line-height: .95;
  margin: 0 0 18px;
}
.worksheet-copy > p { color: var(--muted); }
.worksheet-controls { display: grid; gap: 12px; margin-top: 24px; }
.worksheet-controls label {
  display: grid;
  gap: 6px;
  font-size: .82rem;
  font-weight: 800;
}
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: white;
  padding: 12px 13px;
  color: var(--ink);
}
.generate-button {
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  color: white;
  background: var(--purple);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(109,40,217,.25);
}

.worksheet-paper {
  min-height: 650px;
  background:
    linear-gradient(#fffdfb, #fffdfb) padding-box,
    repeating-linear-gradient(0deg, transparent, transparent 31px, rgba(109,40,217,.09) 32px) border-box;
  border: 1px solid #d8c3ff;
  border-radius: 10px;
  box-shadow: 0 30px 60px rgba(62, 29, 94, .14);
  padding: 24px 30px 38px;
  position: relative;
}
.worksheet-paper::before {
  content: "";
  position: absolute;
  left: 38px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(236,72,153,.2);
}
.paper-top {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
}
#worksheetContent { padding: 28px 8px 0 26px; }
.paper-kicker { color: var(--purple); text-transform: uppercase; letter-spacing: .12em; font-weight: 800; font-size: .72rem; }
#worksheetContent h3 { font: 700 2rem "Space Grotesk", sans-serif; margin: 6px 0 10px; }
#worksheetContent ol { padding-left: 24px; }
#worksheetContent li { margin: 13px 0; }
.worksheet-section {
  margin: 22px 0;
  padding-top: 12px;
  border-top: 1px solid rgba(59,18,111,.12);
}
.worksheet-section h4 {
  margin: 0 0 8px;
  color: var(--purple-dark);
  font: 700 1.05rem "Space Grotesk", sans-serif;
}

.study-studio {
  width: calc(100% + 64px);
  margin-left: -32px;
  padding-left: 32px;
  padding-right: 32px;
  background: linear-gradient(145deg, #2a0b4d, #5b21b6 55%, #7c3aed);
  border-radius: 34px;
  color: white;
}
.study-layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 18px;
}
.study-buttons { display: grid; gap: 10px; }
.study-buttons button {
  text-align: left;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: white;
  padding: 15px 16px;
  border-radius: 14px;
  cursor: pointer;
}
.study-buttons button:hover,
.study-buttons button.active { background: white; color: var(--purple-dark); }
.study-answer {
  min-height: 330px;
  background: white;
  color: var(--ink);
  border-radius: 24px;
  padding: 28px;
}
.answer-number {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--lavender);
  color: var(--purple);
  font-weight: 800;
  margin-bottom: 45px;
}
.study-answer h3 { font: 700 2.4rem/1 "Space Grotesk", sans-serif; margin: 6px 0 12px; }
.study-answer p:last-child { color: var(--muted); }

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.challenge-grid article {
  padding: 22px;
  border-radius: 20px;
  background: white;
  border: 1px solid var(--border);
}
.challenge-grid article span { color: var(--purple); font-weight: 800; }
.challenge-grid h3 { font: 700 1.3rem "Space Grotesk", sans-serif; }
.challenge-grid p { color: var(--muted); font-size: .92rem; }

.brain-card {
  padding: 34px;
  border-radius: 30px;
  background: var(--lavender);
  border: 1px solid var(--lilac);
}
.brain-card h2 { margin: 0 0 12px; font-size: clamp(2.4rem, 4.6vw, 4rem); line-height: 1; }
.brain-card > div:first-child p:last-child { color: var(--muted); }
.reset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 28px 0 14px;
}
.reset-grid button {
  border: 1px solid var(--border);
  background: white;
  border-radius: 16px;
  padding: 15px;
  text-align: left;
  font-weight: 700;
  cursor: pointer;
}
.reset-grid button:hover { border-color: var(--purple); color: var(--purple); }
.reset-result {
  background: var(--purple-dark);
  color: white;
  padding: 18px;
  border-radius: 16px;
}

footer {
  width: min(1180px, calc(100% - 32px));
  margin: 40px auto 22px;
  display: grid;
  grid-template-columns: 1.2fr 1fr auto;
  gap: 28px;
  align-items: end;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
}
footer strong { color: var(--ink); font: 700 1.2rem "Space Grotesk", sans-serif; }
footer p { margin: 6px 0 0; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
footer a { text-decoration: none; font-weight: 700; }

.subject-dialog {
  width: min(720px, calc(100% - 30px));
  border: 0;
  border-radius: 28px;
  padding: 0;
  box-shadow: 0 40px 120px rgba(27, 9, 54, .35);
}
.subject-dialog::backdrop { background: rgba(24, 10, 42, .55); backdrop-filter: blur(7px); }
.dialog-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: var(--lavender);
  cursor: pointer;
  font-size: 1.4rem;
}
.dialog-inner { padding: 36px; }
.dialog-inner .big-icon {
  width: 70px;
  height: 70px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  background: var(--purple);
  color: white;
  font: 700 1.8rem "Space Grotesk", sans-serif;
}
.dialog-inner h2 { font: 700 3rem/1 "Space Grotesk", sans-serif; margin: 20px 0 12px; }
.dialog-inner > p { color: var(--muted); }
.dialog-topics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 22px;
}
.dialog-topics div {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--lavender-soft);
}
.dialog-topics strong { display: block; color: var(--purple-dark); }
.dialog-topics span { font-size: .86rem; color: var(--muted); }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    padding: 14px;
    border-radius: 18px;
    background: white;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  nav.open { display: flex; }
  .mobile-menu { display: block; }
  .hero { grid-template-columns: 1fr; padding-top: 58px; }
  .hero-visual { min-height: 430px; }
  .quick-dock { grid-template-columns: repeat(2, 1fr); }
  .subject-grid { grid-template-columns: repeat(2, 1fr); }
  .worksheet-lab { grid-template-columns: 1fr; }
  .worksheet-copy { position: static; }
  .challenge-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  main { width: min(100% - 22px, 1180px); }
  .site-header { width: calc(100% - 22px); }
  .hero { min-height: auto; padding: 48px 0; }
  .hero h1 { font-size: clamp(3.2rem, 17vw, 5rem); }
  .hero-visual { transform: scale(.82); margin: -30px 0; }
  .quick-dock { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 16px; }
  .year-panel { grid-template-columns: 1fr; padding: 15px; }
  .year-focus { grid-template-columns: 1fr; }
  .subject-grid { grid-template-columns: 1fr; }
  .worksheet-paper { padding: 18px; min-height: 580px; }
  .worksheet-paper::before { left: 27px; }
  #worksheetContent { padding-left: 18px; }
  .study-studio { width: calc(100% + 22px); margin-left: -11px; padding-left: 11px; padding-right: 11px; border-radius: 22px; }
  .study-layout { grid-template-columns: 1fr; }
  .challenge-grid { grid-template-columns: 1fr; }
  .reset-grid { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; align-items: start; }
  .dialog-topics { grid-template-columns: 1fr; }
}