body { background: #fbfcfc; }
.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(212, 225, 227, 0.9); background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(16px); }
.nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-links, .nav-actions { display: flex; align-items: center; gap: 6px; }
.nav-links a { border-radius: var(--r-sm); padding: 8px 11px; color: var(--ink-600); font-size: 0.875rem; font-weight: 700; text-decoration: none; }
.nav-links a:hover { background: var(--surface-soft); color: var(--ink-950); }
.nav-panel, .menu-toggle { display: none; }

.landing-hero { position: relative; overflow: hidden; padding-block: clamp(56px, 8vw, 108px); background: linear-gradient(135deg, #fbfdfd 0%, #f5fafa 55%, #ebf4f4 100%); }
.landing-hero::before, .landing-hero::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.landing-hero::before { width: min(40vw, 560px); aspect-ratio: 1; right: -12vw; top: -25vw; border: 1px solid rgba(49, 132, 154, 0.12); box-shadow: 0 0 0 40px rgba(49, 132, 154, 0.035), 0 0 0 80px rgba(49, 132, 154, 0.018); }
.landing-hero::after { width: 200px; height: 200px; left: -110px; bottom: -130px; background: rgba(212, 155, 72, 0.08); }
.hero-layout { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr); align-items: center; gap: clamp(36px, 6vw, 80px); }
.hero-copy { max-width: 680px; }
.hero-copy h1 { margin: 14px 0 20px; font-size: clamp(2.2rem, 4.8vw, 3.4rem); }
.hero-copy h1 span { color: var(--brand-600); }
.hero-copy .lead { max-width: 580px; margin-bottom: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 20px; color: var(--ink-600); font-size: 0.82rem; font-weight: 700; }
.hero-proof b { margin-right: 4px; color: var(--success-600); }

.study-preview { position: relative; border: 1px solid #c9dadd; border-radius: 24px; background: #fff; box-shadow: 0 30px 70px rgba(18, 53, 64, 0.16); overflow: hidden; }
.study-preview::after { content: ""; position: absolute; z-index: -1; width: 72%; height: 54%; right: -18%; bottom: -18%; border-radius: 28px; background: var(--accent-100); rotate: -8deg; }
.preview-top { display: flex; align-items: center; justify-content: space-between; min-height: 58px; border-bottom: 1px solid var(--line); background: #fff; padding: 0 18px; }
.preview-brand { display: flex; align-items: center; gap: 8px; color: var(--ink-800); font-size: 0.84rem; font-weight: 850; }
.preview-brand i { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 7px; background: var(--brand-700); color: #fff; font-size: 0.58rem; font-style: normal; }
.preview-status { border-radius: 999px; background: var(--success-100); color: var(--success-600); padding: 5px 8px; font-size: 0.69rem; font-weight: 800; }
.preview-layout { display: grid; grid-template-columns: 56px minmax(0, 1fr); min-height: 390px; background: #f6f9f9; }
.preview-rail { display: grid; align-content: start; justify-items: center; gap: 17px; border-right: 1px solid var(--line); background: #12333d; padding-top: 24px; }
.preview-rail i { width: 21px; height: 21px; display: block; border-radius: 7px; background: #315461; }
.preview-rail i.active { background: #70a7b5; box-shadow: 0 0 0 5px rgba(112, 167, 181, 0.16); }
.preview-content { padding: 26px; }
.preview-head { display: flex; justify-content: space-between; gap: 14px; }
.preview-head span, .preview-label { display: block; color: var(--brand-600); font-size: 0.66rem; font-weight: 850; letter-spacing: 0.1em; }
.preview-head strong { display: block; margin-top: 5px; font-size: 1rem; }
.preview-head > b { height: max-content; border-radius: 9px; background: var(--accent-100); color: var(--warning-600); padding: 7px 8px; font-size: 0.72rem; }
.preview-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }
.preview-metrics > div { border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 13px; }
.preview-metrics span, .preview-metrics small { display: block; color: var(--ink-600); font-size: 0.69rem; }
.preview-metrics strong { display: block; margin: 5px 0 1px; color: var(--ink-950); font-size: 1.45rem; line-height: 1; }
.preview-question { margin-top: 18px; border: 1px solid var(--line); border-radius: 15px; background: #fff; padding: 17px; }
.preview-question > strong { display: block; margin: 9px 0 16px; color: var(--ink-800); font-size: 0.92rem; line-height: 1.5; }
.preview-choice { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 9px; margin-top: 7px; padding: 8px; color: var(--ink-600); font-size: 0.76rem; }
.preview-choice i { width: 12px; height: 12px; border: 1px solid #b7c7ca; border-radius: 50%; }
.preview-choice span { width: 20px; height: 20px; display: grid; place-items: center; border-radius: 6px; background: var(--surface-muted); color: var(--brand-700); font-size: 0.66rem; font-weight: 850; }

.value-strip { border-block: 1px solid var(--line); background: #fff; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.value-grid > div { display: grid; gap: 3px; min-height: 112px; align-content: center; padding: 20px 32px; }
.value-grid > div + div { border-left: 1px solid var(--line); }
.value-grid strong { font-size: 0.96rem; }
.value-grid span { color: var(--ink-600); font-size: 0.85rem; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 42px; }
.section-heading h2 { max-width: 700px; margin: 12px 0 0; }
.section-heading .lead { max-width: 420px; margin-bottom: 5px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { position: relative; min-height: 320px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 18px; background: #fff; padding: 26px; box-shadow: 0 10px 26px rgba(25, 54, 64, 0.035); transition: translate 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
.feature-card:hover { translate: 0 -5px; border-color: #b6d0d5; box-shadow: var(--shadow-sm); }
.feature-index { position: absolute; right: 22px; top: 20px; color: var(--ink-400); font-size: 0.74rem; font-weight: 850; letter-spacing: 0.08em; }
.feature-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; background: var(--surface-muted); color: var(--brand-700); font-size: 1.3rem; font-weight: 850; }
.feature-card h3 { margin: 30px 0 9px; font-size: 1.3rem; }
.feature-card p { margin: 0; color: var(--ink-600); }
.feature-link { margin-top: auto; padding-top: 24px; color: var(--brand-700); font-size: 0.8rem; font-weight: 800; }

.method-section { padding-block: clamp(70px, 9vw, 118px); background: var(--ink-950); color: #fff; }
.method-layout { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(420px, 1fr); align-items: center; gap: clamp(42px, 8vw, 110px); }
.method-copy .eyebrow { color: #8bbfca; }
.method-copy h2 { max-width: 640px; margin: 14px 0 20px; }
.method-copy > p { max-width: 560px; color: #aac1c7; font-size: 1.04rem; }
.text-link { display: inline-flex; gap: 10px; margin-top: 20px; color: #fff; font-weight: 800; text-decoration: none; }
.text-link span { color: var(--accent-500); }
.method-steps { border: 1px solid #355660; border-radius: 18px; overflow: hidden; }
.method-steps article { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 16px; align-items: start; padding: 23px; }
.method-steps article + article { border-top: 1px solid #355660; }
.method-steps article > span { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px; background: #244752; color: #b7d5dc; font-size: 0.82rem; font-weight: 850; }
.method-steps h3 { margin: 4px 0 5px; font-size: 1.05rem; }
.method-steps p { margin: 0; color: #9fb7bd; font-size: 0.9rem; }

.study-commitment { padding-block: clamp(54px, 7vw, 92px); }
.commitment-card { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(290px, 0.9fr); align-items: center; gap: 42px; border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(120deg, #f4fafa 0%, #fff 100%); padding: clamp(26px, 5vw, 56px); }
.commitment-card h2 { max-width: 650px; margin: 12px 0; }
.commitment-card p { max-width: 620px; margin: 0; color: var(--ink-600); }
.commitment-points { display: grid; gap: 10px; }
.commitment-points span { display: flex; align-items: center; gap: 10px; border: 1px solid #d4e4e7; border-radius: 12px; background: rgba(255,255,255,0.78); padding: 14px; color: var(--ink-800); font-size: 0.9rem; font-weight: 750; }
.commitment-points span::before { content: "✓"; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: var(--success-100); color: var(--success-600); font-size: 0.75rem; font-weight: 900; }

.final-cta { padding-block: clamp(62px, 8vw, 96px); background: var(--accent-100); }
.cta-box { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.cta-box .eyebrow { color: var(--warning-600); }
.cta-box h2 { max-width: 690px; margin: 12px 0 8px; }
.cta-box p { margin: 0; color: var(--ink-600); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.cta-actions .button-secondary { border-color: rgba(145, 96, 30, 0.2); background: rgba(255,255,255,0.68); }

.site-footer { background: #0c2129; color: #d8e7e9; padding-block: 50px 26px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 0.75fr 0.75fr; gap: 44px; }
.site-footer .brand { color: #fff; }
.site-footer p { max-width: 310px; margin: 15px 0 0; color: #93aab1; font-size: 0.88rem; }
.site-footer strong { color: #fff; font-size: 0.85rem; }
.site-footer a:not(.brand) { display: block; width: max-content; margin-top: 10px; color: #9bb1b7; font-size: 0.86rem; text-decoration: none; }
.site-footer a:not(.brand):hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; margin-top: 44px; border-top: 1px solid #29414a; padding-top: 22px; color: #78939b; font-size: 0.8rem; }

@media (max-width: 960px) {
  .hero-layout, .method-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 720px; }
  .study-preview { width: min(100%, 620px); }
  .section-heading { align-items: start; flex-direction: column; }
  .section-heading .lead { max-width: 600px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 230px; }
  .commitment-card { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 720px) {
  .nav { min-height: 66px; }
  .nav-links, .nav-actions > a { display: none; }
  .menu-toggle { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 11px; background: #fff; color: var(--ink-800); font-size: 1.05rem; }
  .nav-panel { position: fixed; inset: 67px 0 auto; display: none; gap: 6px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-lg); padding: 14px 16px 22px; }
  .nav-panel.open { display: grid; }
.nav-panel a { min-height: 46px; display: flex; align-items: center; border-radius: 10px; padding: 11px 13px; color: var(--ink-800); font-weight: 750; text-decoration: none; }
.nav-panel .button { margin-top: 4px; color: #fff; }

  .landing-hero { padding-block: 44px 56px; }
  .hero-copy h1 { font-size: clamp(2.2rem, 9.4vw, 2.8rem); }
  .hero-copy .lead { font-size: 1rem; }
  .hero-actions { display: grid; }
  .study-preview { border-radius: 18px; }
  .preview-layout { grid-template-columns: 44px minmax(0, 1fr); min-height: 352px; }
  .preview-content { padding: 18px; }
  .value-grid { grid-template-columns: 1fr; }
  .value-grid > div { min-height: auto; padding: 18px 0; }
  .value-grid > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .method-steps article { padding: 18px; }
  .cta-box { align-items: start; flex-direction: column; }
  .cta-actions { width: 100%; display: grid; }
  .cta-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { align-items: start; flex-direction: column; gap: 5px; margin-top: 32px; }
}

[data-theme="dark"] .study-preview,
[data-theme="dark"] .preview-top,
[data-theme="dark"] .preview-metrics > div,
[data-theme="dark"] .preview-question,
[data-theme="dark"] .value-strip,
[data-theme="dark"] .feature-card,
[data-theme="dark"] .commitment-card,
[data-theme="dark"] .commitment-points span,
[data-theme="dark"] .menu-toggle,
[data-theme="dark"] .nav-panel { background: var(--surface); border-color: var(--line); }
[data-theme="dark"] .commitment-card { background: linear-gradient(120deg, var(--surface-muted), var(--surface)); }
[data-theme="dark"] .method-section,
[data-theme="dark"] .site-footer { background: #0b1114; }

@media (max-width: 390px) {
  .hero-proof { display: grid; gap: 7px; }
  .preview-top { padding-inline: 13px; }
  .preview-status { display: none; }
  .preview-metrics { grid-template-columns: 1fr; }
  .preview-question { margin-top: 12px; }
}