:root {
  --ink: #172033;
  --muted: #61708f;
  --primary: #5b5cf6;
  --primary-dark: #3536aa;
  --secondary: #06b6d4;
  --orange: #ff8a3d;
  --yellow: #ffd166;
  --green: #22c55e;
  --red: #ef4444;
  --pink: #ec4899;
  --purple: #8b5cf6;
  --bg: #f6f8ff;
  --soft: #eef4ff;
  --card: #ffffff;
  --line: #e4e9f5;
  --shadow: 0 24px 70px rgba(28, 39, 84, .14);
  --shadow-soft: 0 14px 34px rgba(28, 39, 84, .10);
  --radius: 28px;
  --radius-sm: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 4%, rgba(91, 92, 246, .13), transparent 32rem),
    radial-gradient(circle at 92% 2%, rgba(6, 182, 212, .13), transparent 28rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
img, svg { max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 248, 255, .88);
  border-bottom: 1px solid rgba(228, 233, 245, .86);
  backdrop-filter: blur(18px);
}
.nav-shell {
  width: min(1220px, calc(100% - 32px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -.04em;
}
.brand-copy { display: inline-flex; align-items: baseline; gap: 1px; }
.brand small { color: var(--primary); font-size: .95em; }
.brand-mark {
  width: 50px;
  height: 50px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 950;
  font-size: 1.55rem;
  background: linear-gradient(135deg, #4f46e5, #06b6d4 55%, #22c55e);
  box-shadow: 0 14px 32px rgba(79, 70, 229, .28);
}
.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  padding: 11px 12px;
  color: #34415d;
  font-weight: 800;
  font-size: .94rem;
  border-radius: 999px;
}
.nav-links a:hover { background: #fff; color: var(--primary-dark); box-shadow: var(--shadow-soft); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 15px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}
.menu-toggle span { display: block; width: 22px; height: 2px; margin: 4px auto; background: var(--ink); border-radius: 999px; }
.menu-toggle em { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.section-pad { width: min(1220px, calc(100% - 32px)); margin: 0 auto; padding: 74px 0; }
.section-title { max-width: 780px; margin-bottom: 28px; }
.section-title.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  color: var(--primary-dark);
  font-weight: 950;
  font-size: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 6px rgba(255, 138, 61, .14); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -.045em; }
h1 { font-size: clamp(2.65rem, 6vw, 5.65rem); }
h2 { font-size: clamp(2rem, 3.7vw, 3.35rem); }
h3 { font-size: 1.2rem; }
p { color: var(--muted); margin: 12px 0 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  font-weight: 900;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--primary), var(--secondary)); box-shadow: 0 16px 34px rgba(91, 92, 246, .28); }
.btn-secondary { color: var(--primary-dark); background: #fff; box-shadow: var(--shadow-soft); }
.btn-light { background: rgba(255,255,255,.78); color: var(--primary-dark); border: 1px solid var(--line); }
.btn-ghost { color: var(--primary-dark); background: #f1f5ff; }
.btn-large { min-height: 54px; padding: 15px 22px; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, .72fr);
  align-items: center;
  gap: 38px;
  min-height: calc(100vh - 82px);
}
.hero-content, .progress-card { position: relative; z-index: 1; }
.hero-text { max-width: 760px; font-size: clamp(1.08rem, 2vw, 1.28rem); color: #485777; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.trust-row span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  color: #35415e;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
}
.hero-glow { position: absolute; border-radius: 999px; filter: blur(8px); opacity: .72; pointer-events: none; }
.hero-glow-one { width: 210px; height: 210px; right: 25%; top: 12%; background: rgba(255, 209, 102, .28); }
.hero-glow-two { width: 180px; height: 180px; right: 4%; bottom: 15%; background: rgba(236, 72, 153, .18); }
.progress-card {
  padding: 28px;
  border-radius: 34px;
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.82));
  border: 1px solid rgba(255,255,255,.9);
  box-shadow: var(--shadow);
}
.progress-card::before {
  content: "";
  position: absolute;
  inset: -10px;
  z-index: -1;
  border-radius: 42px;
  background: linear-gradient(135deg, rgba(91,92,246,.28), rgba(6,182,212,.22), rgba(34,197,94,.18));
}
.card-topline { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-weight: 900; }
.card-topline strong { color: var(--primary-dark); }
.progress-card h2 { margin-top: 18px; font-size: 2rem; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 22px 0; }
.hero-stats div, .stat {
  padding: 16px 12px;
  border-radius: 20px;
  background: #f7f9ff;
  border: 1px solid var(--line);
}
.hero-stats strong, .stat strong { display: block; color: var(--ink); font-size: 1.55rem; line-height: 1; }
.hero-stats span, .stat span, .stat { color: var(--muted); font-weight: 800; font-size: .86rem; }
.progress-track { height: 13px; overflow: hidden; border-radius: 999px; background: #e6ecfa; }
.progress-track span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--red), var(--yellow), var(--green)); }
.traffic-status { display: grid; grid-template-columns: 18px 1fr; gap: 10px 12px; margin-top: 22px; align-items: center; }
.light { width: 17px; height: 17px; border-radius: 50%; opacity: .45; }
.light.active { opacity: 1; box-shadow: 0 0 0 7px rgba(34, 197, 94, .13); }
.red { background: var(--red); } .yellow { background: var(--yellow); } .green { background: var(--green); }
.traffic-status p { margin: 0; font-size: .94rem; }
.traffic-status strong { color: var(--ink); }

.soft-bg {
  width: 100%;
  max-width: none;
  padding-left: max(16px, calc((100% - 1220px) / 2));
  padding-right: max(16px, calc((100% - 1220px) / 2));
  background: linear-gradient(135deg, rgba(91,92,246,.08), rgba(6,182,212,.08));
  border-block: 1px solid rgba(228,233,245,.9);
}
.grade-groups { display: grid; gap: 22px; }
.grade-band {
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.78);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255,255,255,.9);
}
.grade-band:nth-child(1) { background: linear-gradient(135deg, rgba(255, 209, 102, .22), rgba(255,255,255,.86)); }
.grade-band:nth-child(2) { background: linear-gradient(135deg, rgba(6, 182, 212, .18), rgba(255,255,255,.86)); }
.grade-band:nth-child(3) { background: linear-gradient(135deg, rgba(139, 92, 246, .18), rgba(255,255,255,.86)); }
.grade-band-head { display: flex; justify-content: space-between; gap: 16px; align-items: end; margin-bottom: 18px; }
.grade-band-head h3 { font-size: 1.55rem; }
.grade-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.grade-card, .feature-card, .course-card, .panel-link, .testimonial-grid article, .faq-item, .panel-card, .unit-card, .lesson-card, .teacher-box, .sample-question {
  border: 1px solid rgba(228,233,245,.92);
  background: rgba(255,255,255,.92);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
}
.grade-card {
  position: relative;
  overflow: hidden;
  padding: 18px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
}
.grade-card::after { content: ""; position: absolute; right: -34px; top: -34px; width: 92px; height: 92px; border-radius: 50%; background: var(--grade-color, rgba(91,92,246,.16)); opacity: .28; }
.grade-card strong { font-size: 2rem; line-height: 1; letter-spacing: -.06em; }
.grade-card p { margin-bottom: 12px; }
.grade-meta { display: grid; gap: 7px; margin-top: auto; color: var(--muted); font-weight: 800; font-size: .9rem; }
.grade-meta span { display: flex; justify-content: space-between; gap: 8px; padding-top: 7px; border-top: 1px dashed var(--line); }

.feature-grid, .course-grid, .panel-grid, .testimonial-grid, .panel-layout { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.feature-card { padding: 22px; }
.feature-card .icon, .course-card .icon, .panel-link .icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 14px; border-radius: 16px; background: linear-gradient(135deg, rgba(91,92,246,.14), rgba(6,182,212,.14)); font-size: 1.35rem; }
.course-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.course-card { padding: 24px; display: flex; flex-direction: column; min-height: 238px; }
.course-card .meta { color: var(--primary-dark); font-weight: 950; margin-top: 14px; }
.course-card .btn { margin-top: auto; align-self: flex-start; }

.quiz-showcase {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 28px;
  align-items: stretch;
}
.quiz-copy {
  padding: 34px;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, #4338ca, #0ea5e9 58%, #10b981);
  box-shadow: var(--shadow);
}
.quiz-copy .eyebrow, .quiz-copy p { color: rgba(255,255,255,.86); }
.quiz-copy .eyebrow::before { background: #fff; box-shadow: 0 0 0 6px rgba(255,255,255,.16); }
.quiz-copy .btn { margin-top: 22px; background: #fff; color: var(--primary-dark); }
.quiz-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.quiz-steps article { padding: 24px; border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow-soft); border: 1px solid var(--line); }
.quiz-steps span { display: inline-flex; color: var(--primary-dark); font-weight: 950; margin-bottom: 12px; }
.panel-link { padding: 26px; min-height: 245px; display: flex; flex-direction: column; }
.panel-link .btn { margin-top: auto; align-self: flex-start; }
.testimonials { padding-top: 40px; }
.testimonial-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.testimonial-grid article { padding: 26px; }
.testimonial-grid p { color: #35415d; font-size: 1.02rem; }
.testimonial-grid strong { display: block; margin-top: 18px; color: var(--primary-dark); }
.faq-list { display: grid; gap: 12px; max-width: 940px; }
.faq-item { overflow: hidden; }
.faq-question { width: 100%; display: flex; justify-content: space-between; gap: 16px; padding: 20px 22px; border: 0; background: #fff; color: var(--ink); font-weight: 950; text-align: left; }
.faq-answer { display: none; padding: 0 22px 20px; }
.faq-item.open .faq-answer { display: block; }

.page-hero {
  background: linear-gradient(135deg, rgba(91, 92, 246, .13), rgba(6, 182, 212, .11));
  border-bottom: 1px solid var(--line);
}
.page-hero .section-pad { padding-top: 52px; padding-bottom: 52px; }
.breadcrumb, .breadcrumb a { color: var(--muted); font-weight: 850; }
.grade-dashboard { display: grid; grid-template-columns: 1fr 360px; gap: 22px; align-items: start; }
.lesson-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.lesson-card { padding: 20px; text-align: left; border: 2px solid transparent; color: var(--ink); }
.lesson-card.active { border-color: rgba(91,92,246,.42); background: linear-gradient(135deg, rgba(91,92,246,.12), #fff); }
.units-wrap { display: grid; gap: 16px; margin-top: 20px; }
.unit-card { overflow: hidden; }
.unit-toggle { width: 100%; padding: 20px; display: flex; align-items: center; justify-content: space-between; gap: 14px; border: 0; background: #fff; text-align: left; }
.unit-toggle h3 { font-size: 1.15rem; }
.unit-content { display: none; padding: 0 20px 20px; }
.unit-card.open .unit-content { display: block; }
.action-row, .level-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.level-btn.active { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; }
.test-box, .sample-question {
  margin-top: 16px;
  padding: 22px;
  border-radius: 20px;
  background: #f7faff;
  border: 1px solid var(--line);
}
.option-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.option-grid button {
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 13px 14px;
  background: #fff;
  color: var(--ink);
  font-weight: 850;
  text-align: left;
}
.option-grid button.correct { border-color: rgba(34,197,94,.55); background: rgba(34,197,94,.12); color: #166534; }
.option-grid button.wrong { border-color: rgba(239,68,68,.55); background: rgba(239,68,68,.10); color: #991b1b; }
.feedback { font-weight: 900; color: var(--primary-dark); }
.side-stack { display: grid; gap: 16px; position: sticky; top: 100px; }
.teacher-box, .sample-question { padding: 22px; }
.daily-goal { display: grid; gap: 10px; }
.status-pill { display: inline-flex; align-items: center; gap: 8px; width: fit-content; padding: 9px 12px; border-radius: 999px; background: rgba(34,197,94,.12); color: #166534; font-weight: 950; }

.panel-layout { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.panel-card { padding: 26px; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.task-list, .admin-list { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 12px; }
.task-list li, .admin-list li { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 14px; border-radius: 16px; background: #f7f9ff; color: #35415d; font-weight: 850; }
.form-grid { display: grid; gap: 12px; margin-top: 16px; }
.form-grid input, .form-grid select { width: 100%; border: 1px solid var(--line); border-radius: 16px; padding: 13px 14px; background: #fff; color: var(--ink); }

.site-footer {
  margin-top: 30px;
  padding: 42px max(16px, calc((100% - 1220px) / 2));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  background: #101827;
  color: #fff;
}
.site-footer p { color: rgba(255,255,255,.72); max-width: 720px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.site-footer nav a { color: rgba(255,255,255,.88); font-weight: 850; }
.copyright { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; }
.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  max-width: 360px;
  padding: 14px 16px;
  border-radius: 18px;
  background: #101827;
  color: #fff;
  box-shadow: var(--shadow);
  transform: translateY(18px);
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 1060px) {
  .nav-shell { flex-wrap: wrap; padding: 12px 0; }
  .menu-toggle { display: inline-block; margin-left: auto; }
  .nav-actions { margin-left: 0; }
  .nav-links {
    order: 5;
    display: none;
    width: 100%;
    padding: 12px;
    border-radius: 22px;
    background: #fff;
    box-shadow: var(--shadow-soft);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .nav-links.open { display: grid; }
  .hero, .quiz-showcase, .grade-dashboard { grid-template-columns: 1fr; min-height: auto; }
  .side-stack { position: static; }
  .grade-cards, .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .section-pad { width: min(100% - 24px, 1220px); padding: 48px 0; }
  .brand { font-size: 1.12rem; }
  .brand-mark { width: 44px; height: 44px; border-radius: 15px; }
  .nav-actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }
  .nav-actions .btn { padding-inline: 10px; }
  .hero-stats, .grade-cards, .feature-grid, .course-grid, .panel-grid, .testimonial-grid, .panel-layout, .lesson-grid, .quiz-steps { grid-template-columns: 1fr; }
  .progress-card, .quiz-copy, .grade-band { padding: 20px; border-radius: 24px; }
  .grade-band-head { display: block; }
  .option-grid, .stat-grid { grid-template-columns: 1fr; }
  .task-list li, .admin-list li { align-items: stretch; flex-direction: column; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer nav { justify-content: flex-start; }
}