/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --gray-900: #1a1a1a;
  --gray-600: #4a4a4a;
  --gray-400: #9a9a9a;
  --gray-100: #f5f5f5;
  --white: #ffffff;
  --accent: #7B3FA0;
  --accent-light: #f3eefa;
  --font-sans: -apple-system, 'Inter', 'Helvetica Neue', sans-serif;
  --max-w: 1100px;
  --radius: 8px;
}

body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #ebebeb;
  z-index: 100;
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--black);
}
.site-logo span { color: var(--accent); }
.site-nav { display: flex; gap: 2rem; }
.site-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--black); }
.nav-toggle { display: none; background: none; border: none; font-size: 20px; cursor: pointer; }

/* ===== HERO ===== */
.hero {
  padding: 120px 2rem 100px;
  border-bottom: 1px solid #ebebeb;
}
.hero-inner { max-width: var(--max-w); margin: 0 auto; }
.hero-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 2rem;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  color: var(--black);
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: 18px;
  color: var(--gray-600);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block;
  background: var(--black);
  color: var(--white);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--gray-900); }
.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--black);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid #ddd;
  transition: border-color 0.2s;
}
.btn-secondary:hover { border-color: var(--black); }

/* ===== PILLARS ===== */
.pillars {
  padding: 100px 2rem;
  border-bottom: 1px solid #ebebeb;
}
.pillars-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}
.pillar-icon { font-size: 32px; margin-bottom: 1rem; }
.pillar h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--black);
}
.pillar p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.pillar a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.pillar a:hover { text-decoration: underline; }

/* ===== PULLQUOTE ===== */
.pullquote {
  padding: 100px 2rem;
  background: var(--gray-100);
  border-bottom: 1px solid #ebebeb;
}
.pullquote-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.pullquote blockquote {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--black);
  margin-bottom: 1.5rem;
}
.pullquote cite {
  font-size: 14px;
  color: var(--gray-400);
  font-style: normal;
}

/* ===== CTA ===== */
.community-cta {
  padding: 120px 2rem;
  border-bottom: 1px solid #ebebeb;
}
.cta-inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}
.cta-inner h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}
.cta-inner p {
  font-size: 17px;
  color: var(--gray-600);
  margin-bottom: 2rem;
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 60px 2rem;
  border-top: 1px solid #ebebeb;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}
.footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--black);
}
.footer-logo span { color: var(--accent); }
.footer-inner p {
  color: var(--gray-400);
  font-size: 14px;
  margin: 0.75rem 0;
}
.footer-nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}
.footer-nav a {
  font-size: 14px;
  color: var(--gray-600);
}
.footer-nav a:hover { color: var(--black); }
.footer-copy { color: var(--gray-400); font-size: 13px; }

/* ===== SCIENCE PAGE ===== */
.page-header {
  padding: 120px 2rem 100px;
  border-bottom: 1px solid #ebebeb;
}
.page-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.page-header h1 {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--black);
  margin-bottom: 1.25rem;
}
.page-sub {
  font-size: 18px;
  color: var(--gray-600);
  max-width: 580px;
  line-height: 1.7;
}

.science-section {
  padding: 100px 2rem;
  border-bottom: 1px solid #ebebeb;
}
.science-section.alt {
  background: var(--gray-100);
}
.science-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 5rem;
  align-items: start;
}
.science-inner:has(.science-text:only-child) {
  grid-template-columns: 1fr;
}
.science-text h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.75px;
  margin-bottom: 1.5rem;
  color: var(--black);
}
.science-text p {
  font-size: 16px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.science-text p:last-child { margin-bottom: 0; }

/* Comparison cards */
.science-aside {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.5rem;
}
.science-card {
  background: var(--white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius);
  padding: 1.5rem;
}
.science-card-accent {
  border-color: var(--accent);
  background: var(--accent-light);
}
.science-card-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-400);
  margin-bottom: 0.5rem;
}
.science-card-value {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 0.35rem;
}
.science-card-value.danger { color: #c0392b; }
.science-card-value.safe   { color: #27ae60; }
.science-card-note {
  font-size: 13px;
  color: var(--gray-400);
}

/* Safety limits box */
.safety-limits {
  background: var(--white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius);
  padding: 2rem;
  margin-top: 2rem;
}
.safety-limits h3 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}
.limits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}
.limit-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}
.limit-label {
  font-size: 13px;
  color: var(--gray-400);
  margin-top: 0.25rem;
}
.limits-note {
  font-size: 13px;
  color: var(--gray-400);
  line-height: 1.6;
  margin: 0;
}

/* Pathogen list */
.pathogen-list {
  list-style: none;
  margin: 1.5rem 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.pathogen-list li {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.6;
  padding-left: 1.5rem;
  position: relative;
}
.pathogen-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.pathogen-list li strong { color: var(--black); }

/* Research grid */
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}
.research-item {
  background: var(--white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius);
  padding: 1.5rem;
}
.research-org {
  font-size: 15px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 0.5rem;
}
.research-desc {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* Science pull quote */
.science-quote {
  padding: 100px 2rem;
  background: var(--gray-100);
  border-bottom: 1px solid #ebebeb;
}
.science-quote-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.science-quote blockquote {
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--black);
  margin-bottom: 1.5rem;
}
.science-quote cite {
  font-size: 13px;
  color: var(--gray-400);
  font-style: normal;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: white; flex-direction: column; padding: 1rem 2rem; border-bottom: 1px solid #ebebeb; gap: 1rem; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .pillars-inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero { padding: 80px 2rem 60px; }
  .page-header { padding: 80px 2rem 60px; }
  .science-section { padding: 60px 2rem; }
  .science-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .research-grid { grid-template-columns: 1fr; }
  .limits-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
}

/* ===== FAQ PAGE ===== */
.faq-section { padding: 80px 2rem; }
.faq-inner { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #ebebeb; }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 1.5rem 0;
  font-size: 17px;
  font-weight: 600;
  color: #0a0a0a;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: inherit;
}
.faq-q:hover { color: #7B3FA0; }
.faq-icon { font-size: 22px; color: #7B3FA0; flex-shrink: 0; }
.faq-a { padding: 0 0 1.5rem; }
.faq-a p { font-size: 15px; color: #4a4a4a; line-height: 1.8; margin-bottom: 0.75rem; }
.faq-a a { color: #7B3FA0; text-decoration: underline; }

/* ===== DEVICES PAGE ===== */
.devices-section { padding: 60px 2rem 100px; }
.devices-inner { max-width: 860px; margin: 0 auto; }
.devices-intro {
  font-size: 16px;
  color: #4a4a4a;
  line-height: 1.8;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #ebebeb;
}
.device-card {
  border: 1px solid #ebebeb;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 3rem;
}
.device-card.featured { border-color: #7B3FA0; }
.device-card-header {
  padding: 2rem 2.5rem 1.5rem;
  border-bottom: 1px solid #ebebeb;
}
.device-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #7B3FA0;
  background: #f3eefa;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 1rem;
}
.device-name {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.25rem;
}
.device-tagline { font-size: 15px; color: #6a6a6a; }
.device-card-body { padding: 2rem 2.5rem; }
.device-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #f0f0f0;
}
.spec-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: #9a9a9a; margin-bottom: 0.25rem; }
.spec-value { font-size: 15px; font-weight: 600; color: #1a1a1a; }
.device-desc p { font-size: 15px; color: #4a4a4a; line-height: 1.8; }
.device-card-footer {
  padding: 1.5rem 2.5rem;
  background: #fafafa;
  border-top: 1px solid #ebebeb;
}
.devices-coming {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #ebebeb;
}
.devices-coming h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.coming-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.coming-item {
  border: 1px solid #ebebeb;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.coming-name { font-size: 15px; font-weight: 700; margin-bottom: 0.4rem; }
.coming-desc { font-size: 13px; color: #6a6a6a; line-height: 1.5; margin-bottom: 0.75rem; }
.coming-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: #9a9a9a;
  border: 1px solid #e0e0e0;
  padding: 2px 8px;
  border-radius: 20px;
}
.buying-guide h3 { font-size: 20px; font-weight: 700; margin-bottom: 1.5rem; }
.guide-list { list-style: none; padding: 0; }
.guide-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid #ebebeb;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.5rem;
  align-items: start;
}
.guide-list li:last-child { border-bottom: none; }
.guide-list strong { font-size: 14px; font-weight: 700; color: #1a1a1a; padding-top: 2px; }
.guide-list span { font-size: 14px; color: #4a4a4a; line-height: 1.7; }

@media (max-width: 768px) {
  .device-specs { grid-template-columns: 1fr 1fr; }
  .coming-grid { grid-template-columns: 1fr; }
  .guide-list li { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ===== STORIES PAGE ===== */
.stories-section { padding: 60px 2rem 100px; }
.stories-inner { max-width: 860px; margin: 0 auto; }
.stories-intro {
  font-size: 16px;
  color: #4a4a4a;
  line-height: 1.8;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #ebebeb;
}
.stories-cta-block {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #ebebeb;
}
.stories-cta-text h2 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}
.stories-cta-text p {
  font-size: 15px;
  color: #4a4a4a;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}
.stories-cta-note {
  background: #f9f9f9;
  border-radius: 12px;
  padding: 1.5rem;
}
.note-icon { font-size: 24px; margin-bottom: 0.75rem; }
.stories-cta-note p { font-size: 13px; color: #6a6a6a; line-height: 1.7; }
.stories-contexts {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #ebebeb;
}
.stories-contexts h3 { font-size: 20px; font-weight: 700; margin-bottom: 1.5rem; }
.contexts-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}
.context-item {
  text-align: center;
  padding: 1.25rem 0.5rem;
  border: 1px solid #ebebeb;
  border-radius: 12px;
}
.context-icon { font-size: 28px; margin-bottom: 0.5rem; }
.context-label { font-size: 12px; color: #6a6a6a; font-weight: 500; }
.stories-share h3 { font-size: 20px; font-weight: 700; margin-bottom: 0.75rem; }
.stories-share p { font-size: 15px; color: #4a4a4a; line-height: 1.7; margin-bottom: 1.5rem; }

@media (max-width: 768px) {
  .stories-cta-block { grid-template-columns: 1fr; }
  .contexts-grid { grid-template-columns: repeat(3, 1fr); }
}