*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --gray-50: #f9f9f9;
  --gray-100: #f3f3f3;
  --gray-400: #9ca3af;
  --gray-600: #4b5563;
  --accent: #1a56db;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Mulish', system-ui, sans-serif;
  --max-w: 1080px;
  --radius: 16px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--black);
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,0,0,0.07);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--black);
}
.nav-cta {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  background: var(--black);
  padding: 8px 18px;
  border-radius: 100px;
  text-decoration: none;
  transition: opacity 0.18s;
}
.nav-cta:hover { opacity: 0.75; }

/* NAV BRAND */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

/* HERO */
.hero {
  position: relative;
  background: var(--black);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 28px 110px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.35;
}
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10,10,10,0.55) 0%, rgba(10,10,10,0.75) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}
.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 22px;
}
h1 {
  font-family: var(--font-serif);
  font-size: clamp(36px, 6vw, 62px);
  line-height: 1.12;
  color: var(--white);
  margin-bottom: 24px;
}
h1 .accent {
  color: rgba(255,255,255,0.55);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255,255,255,0.6);
  max-width: 580px;
  margin-bottom: 40px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 26px;
  border-radius: 100px;
  text-decoration: none;
  transition: opacity 0.18s, transform 0.18s;
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

/* GOODSELL STRIP */
.goodsell-strip {
  background: var(--black);
  padding: 0;
  overflow: hidden;
}
.goodsell-inner {
  display: flex;
  width: 100%;
}
.goodsell-img {
  width: 50%;
  height: 260px;
  object-fit: cover;
  display: block;
}
.goodsell-caption {
  text-align: center;
  font-size: 11px;
  color: rgba(255,255,255,0.25);
  padding: 10px 20px 14px;
  background: var(--black);
  letter-spacing: 0.02em;
}

/* FEATURES */
.features {
  background: var(--gray-50);
  padding: 96px 28px;
}
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 14px;
}
h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  color: var(--black);
  margin-bottom: 56px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 8px;
  line-height: 1.3;
}
.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--gray-600);
}

/* WHY WE CREATED IT */
.why-section {
  background: var(--black);
  padding: 96px 28px;
}
.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.section-label-light {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--white);
  margin-bottom: 14px;
}
.why-heading {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.2;
  color: var(--white);
  margin-bottom: 36px;
}
.pain-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.pain-list li {
  font-size: 15px;
  line-height: 1.65;
  color: rgba(255,255,255,0.5);
  padding-left: 22px;
  position: relative;
}
.pain-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: rgba(255,255,255,0.2);
  font-weight: 700;
}
.why-solution-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 36px;
}
.why-sparkle {
  font-size: 28px;
  display: block;
  margin-bottom: 16px;
}
.why-solution-card h3 {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.5vw, 26px);
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.25;
}
.why-solution-card p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
}
.solution-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.solution-list li {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.45);
  padding-left: 20px;
  position: relative;
}
.solution-list li::before {
  content: '✕';
  position: absolute;
  left: 0;
  font-size: 11px;
  color: rgba(255,255,255,0.2);
}

/* FOR RESEARCHERS */
.researcher-section {
  background: var(--white);
  padding: 96px 28px;
}
.researcher-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.researcher-text {
  max-width: 480px;
}
.researcher-text h2 {
  margin-bottom: 20px;
}
.researcher-text p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-600);
  margin-bottom: 16px;
}
.researcher-text p:last-of-type {
  margin-bottom: 36px;
}
.researcher-img-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0,0,0,0.14);
}
.researcher-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}
.btn-dark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 26px;
  border-radius: 100px;
  text-decoration: none;
  transition: opacity 0.18s, transform 0.18s;
}
.btn-dark:hover { opacity: 0.75; transform: translateY(-1px); }

/* QUOTE */
.quote-section {
  background: var(--white);
  padding: 96px 28px;
  border-top: 1px solid rgba(0,0,0,0.07);
  border-bottom: 1px solid rgba(0,0,0,0.07);
}
.quote-inner {
  max-width: 700px;
}
blockquote {
  font-family: var(--font-serif);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.45;
  color: var(--black);
  padding-left: 28px;
  border-left: 3px solid var(--black);
}

/* CTA */
.cta-section {
  position: relative;
  background: var(--black);
  padding: 96px 28px;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.cta-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.25;
}
.cta-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10,10,10,0.6) 0%, rgba(10,10,10,0.85) 100%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.cta-logo {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  margin: 0 auto 24px;
  display: block;
}
.cta-inner h2 {
  color: var(--white);
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 36px;
}

/* FOOTER */
footer {
  background: var(--black);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 28px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
footer .wordmark { color: rgba(255,255,255,0.5); font-size: 16px; }
.footer-brand { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.footer-logo { width: 22px; height: 22px; border-radius: 5px; opacity: 0.5; }
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color 0.18s;
}
.footer-links a:hover { color: rgba(255,255,255,0.8); }

/* RESPONSIVE */
@media (max-width: 860px) {
  .why-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .researcher-inner {
    grid-template-columns: 1fr;
  }
  .researcher-img-wrap {
    order: -1;
  }
  .researcher-img {
    height: 280px;
  }
  .goodsell-img {
    height: 180px;
  }
}
@media (max-width: 600px) {
  .hero { padding: 72px 20px 80px; }
  .features, .quote-section, .cta-section, .researcher-section, .why-section { padding: 72px 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}