:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #eef6ff;
  --text: #152033;
  --muted: #617086;
  --line: #dde6f1;
  --blue: #1f6bff;
  --blue-dark: #155bd4;
  --green: #16b95a;
  --teal: #0aa4b8;
  --orange: #ef8b00;
  --purple: #7437c9;
  --radius-lg: 30px;
  --radius-md: 20px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1120px, calc(100% - 32px));
  margin: 18px auto 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.brand,
.nav-links,
.hero-actions,
.footer-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.55rem;
}

.brand-logo {
  display: block;
  flex: 0 0 auto;
  height: 40px;
  width: auto;
  max-width: 168px;
  object-fit: contain;
}

.nav-links {
  gap: 1.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a:hover,
.footer-links a:hover {
  color: var(--blue);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  font-weight: 600;
}

.nav-cta {
  padding: 0 18px;
  background: var(--blue);
  color: #ffffff;
}

.nav-cta--soon {
  background: var(--surface-soft);
  color: var(--muted);
  cursor: default;
}

.section-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 90px);
  padding: 72px 0 52px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 20px;
  font-size: clamp(2.35rem, 5.5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.06em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

h3 {
  margin-bottom: 10px;
  letter-spacing: -0.025em;
}

p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-text {
  max-width: 620px;
  font-size: 1.2rem;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 14px;
}

.button {
  padding: 0 22px;
  border: 1px solid transparent;
}

.button-primary {
  background: var(--blue);
  color: #ffffff;
}

.button-primary:hover,
.nav-cta:hover {
  background: var(--blue-dark);
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover {
  border-color: rgba(33, 117, 255, 0.45);
  color: var(--blue);
}

.trial-note {
  max-width: 520px;
  font-size: 0.94rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero-badges span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.dashboard-card,
.question-card,
.signup-card,
.feature-card,
.confidence-card,
.price-card,
.preview-section,
.trial-section,
.faq-grid article {
  border: 1px solid var(--line);
  background: var(--surface);
}

.dashboard-card {
  position: relative;
  overflow: hidden;
  padding: 18px;
  border-radius: var(--radius-lg);
}

.dashboard-card::before {
  position: absolute;
  inset: auto -90px -140px auto;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(33, 117, 255, 0.11);
  content: "";
}

.dashboard-top {
  display: flex;
  gap: 7px;
  margin-bottom: 16px;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--blue);
}

.window-dot.purple {
  background: var(--purple);
}

.window-dot.green {
  background: var(--green);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metric-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}

.metric-card span,
.metric-card small {
  display: block;
  color: var(--muted);
}

.metric-card strong {
  display: block;
  margin: 8px 0 4px;
  font-size: 1.75rem;
}

.chart-card {
  position: relative;
  min-height: 220px;
  margin: 14px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
}

.plane-watermark {
  position: absolute;
  top: 38px;
  right: 56px;
  color: rgba(33, 117, 255, 0.11);
  font-size: 8.5rem;
}

.chart-line {
  position: absolute;
  right: 34px;
  bottom: 58px;
  left: 34px;
  height: 76px;
  border-top: 4px solid var(--blue);
  border-radius: 50%;
}

.chart-line::after {
  position: absolute;
  top: 18px;
  right: 2px;
  left: 0;
  height: 55px;
  border-top: 3px solid rgba(22, 185, 90, 0.75);
  border-radius: 50%;
  content: "";
}

.chart-labels {
  position: absolute;
  top: 18px;
  right: 20px;
  display: flex;
  gap: 10px;
  color: var(--muted);
  font-size: 0.76rem;
}

.chart-labels span::before {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 4px;
  border-radius: 50%;
  background: var(--blue);
  content: "";
}

.chart-labels span + span::before {
  background: var(--green);
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.action-card {
  min-height: 86px;
  border: 0;
  border-radius: 16px;
  color: #ffffff;
  font: inherit;
  font-weight: 800;
}

.action-card.blue {
  background: var(--blue);
}

.action-card.green {
  background: var(--green);
}

.action-card.teal {
  background: var(--teal);
}

.action-card.orange {
  background: var(--orange);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 90px;
}

.proof-strip span {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  color: var(--muted);
  text-align: center;
}

.confidence-section {
  padding: 8px 0 72px;
}

.confidence-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr 0.9fr;
  gap: 16px;
}

.confidence-card {
  padding: 24px;
  border-radius: var(--radius-md);
}

.confidence-card.primary {
  background: var(--surface);
}

.confidence-card span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.confidence-card .pill {
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--surface-soft);
}

.confidence-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

.confidence-card p:last-child {
  margin-bottom: 0;
}

.syllabus-section {
  padding: 52px 0 70px;
}

.subject-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.subject-grid span {
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}

.split-section,
.preview-section {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 38px;
  align-items: center;
  padding: 72px 0;
}

.sample-stack {
  display: grid;
  gap: 16px;
}

.signup-card {
  display: grid;
  gap: 10px;
  width: min(360px, 100%);
  margin-left: auto;
  padding: 18px;
  border-radius: var(--radius-md);
}

.signup-card span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signup-card small {
  color: var(--muted);
  line-height: 1.5;
}

.signup-card button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: var(--text);
  font: inherit;
  font-weight: 600;
}

.question-card {
  padding: 24px;
  border-radius: var(--radius-md);
}

.question-card:not(.is-active) {
  width: 88%;
  margin-left: auto;
  opacity: 0.82;
}

.question-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.85rem;
}

.answers {
  display: grid;
  gap: 10px;
}

.answers button {
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
  color: var(--text);
  font: inherit;
  text-align: left;
}

.answers .selected {
  border-color: rgba(22, 185, 90, 0.4);
  background: rgba(22, 185, 90, 0.1);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.feature-grid,
.pricing-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card,
.price-card,
.faq-grid article {
  padding: 26px;
  border-radius: var(--radius-md);
}

.feature-icon {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 22px;
  place-items: center;
  border-radius: 14px;
  background: var(--surface-soft);
  color: var(--blue);
  font-weight: 900;
}

.preview-section {
  margin-top: 96px;
  margin-bottom: 96px;
  padding: 30px;
  border-radius: var(--radius-lg);
}

.preview-panel {
  padding: 16px;
}

.mini-sidebar {
  display: grid;
  gap: 12px;
  padding: 22px;
  border-radius: 22px;
  background: #f8fbff;
}

.mini-sidebar span {
  padding: 16px 18px;
  border-radius: 14px;
  color: var(--muted);
}

.mini-sidebar .active {
  background: #eaf3ff;
  color: var(--blue);
  font-weight: 800;
}

.trial-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 96px;
  padding: 34px;
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.trial-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: trial;
}

.trial-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #ffffff;
  counter-increment: trial;
}

.trial-steps li::before {
  display: grid;
  grid-row: span 2;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 13px;
  background: var(--surface-soft);
  color: var(--blue);
  font-weight: 900;
  content: counter(trial);
}

.trial-steps span {
  color: var(--muted);
}

.pricing-grid {
  align-items: stretch;
}

.price-card {
  position: relative;
}

.price-card.featured {
  border-color: rgba(33, 117, 255, 0.34);
}

.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(33, 117, 255, 0.11);
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 700;
}

.price-card strong {
  display: block;
  margin-top: 22px;
  font-size: 3.4rem;
  letter-spacing: -0.06em;
}

.price-card > span {
  display: block;
  margin-bottom: 22px;
  color: var(--muted);
}

.price-card ul {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
  color: var(--muted);
  list-style: none;
}

.price-card li::before {
  margin-right: 8px;
  color: var(--green);
  font-weight: 900;
  content: "✓";
}

.faq-section {
  padding: 80px 0;
}

.faq-grid {
  grid-template-columns: repeat(2, 1fr);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  margin: 30px auto;
  padding: 28px 0 10px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin-bottom: 0;
}

.footer-company {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  gap: 18px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero,
  .split-section,
  .preview-section,
  .trial-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .proof-strip,
  .confidence-grid,
  .metrics-grid,
  .action-grid,
  .feature-grid,
  .pricing-grid,
  .faq-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .site-header {
    width: min(100% - 20px, 1120px);
  }

  .brand-logo {
    height: 32px;
    max-width: 136px;
  }

  h1 {
    font-size: 2.35rem;
  }

  .section-shell,
  .site-footer {
    width: min(100% - 24px, 1120px);
  }

  .proof-strip,
  .confidence-grid,
  .metrics-grid,
  .action-grid,
  .feature-grid,
  .pricing-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-card {
    padding: 12px;
  }

  .site-footer {
    flex-direction: column;
  }
}