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

:root {
  --bettair-navy: #0d1f3c;
  --bettair-blue: #1a3a6b;
  --bettair-accent: #00b4d8;
  --bettair-cyan: #48cae4;
  --bettair-light: #f0f7ff;
  --bettair-white: #ffffff;
  --bettair-gray: #6b7a99;
  --bettair-muted: #f4f7fc;
  --bettair-warn: #f4a261;
  --bettair-green: #2ec4b6;
  --bettair-border: rgba(0,100,200,0.1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bettair-white);
  color: var(--bettair-navy);
  overflow-x: hidden;
}

/* ── NAV ── */

/* ── HERO ── */
.bettair-hero {
  min-height: 100vh;
  background: var(--bettair-white);
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.bettair-hero-bg-circle {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle at center, #e8f6fb 0%, #f5fbfe 50%, transparent 75%);
  pointer-events: none;
}

.bettair-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  width: 100%;
}

.bettair-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,180,216,0.08);
  border: 1px solid rgba(0,180,216,0.25);
  color: var(--bettair-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 28px;
}

.bettair-hero-tag::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--bettair-accent);
  border-radius: 50%;
  animation: bettair-pulse 2s infinite;
}

@keyframes bettair-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.4); }
}

.bettair-hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  font-weight: 800;
  color: var(--bettair-navy);
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
}
.bettair-hero-title em {
  font-style: normal;
  color: var(--bettair-accent);
}

.bettair-hero-subtitle {
  font-size: 1.05rem;
  color: var(--bettair-gray);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 460px;
  font-weight: 300;
}

.bettair-hero-chips {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.bettair-chip {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  color: var(--bettair-blue);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 50px;
}
.bettair-chip span { font-size: 1rem; }

/* ── HERO VISUAL ── */
.bettair-hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bettair-hero-img-wrap {
  position: relative;
  width: 480px;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bettair-hero-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 20px 50px rgba(0,100,180,0.12));
  animation: bettair-device-float 5s ease-in-out infinite;
}

@keyframes bettair-device-float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-14px); }
}

.bettair-hero-stat-badge {
  position: absolute;
  z-index: 3;
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: 0 8px 28px rgba(0,30,80,0.1);
  font-size: 0.78rem;
  color: var(--bettair-gray);
  line-height: 1.3;
  animation: bettair-float 4s ease-in-out infinite;
}

.bettair-hero-stat-badge strong {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bettair-accent);
  margin-bottom: 2px;
}

.bettair-hero-stat-badge:nth-child(2) { top: 60px; right: 0; animation-delay: 0s; }
.bettair-hero-stat-badge:nth-child(3) { bottom: 80px; left: -10px; animation-delay: 1.6s; }
.bettair-hero-stat-badge:nth-child(4) { top: 45%; right: -10px; animation-delay: 0.9s; }

@keyframes bettair-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ── STATS BAR ── */
.bettair-stats-bar {
  background: var(--bettair-muted);
  border-top: 1px solid var(--bettair-border);
  border-bottom: 1px solid var(--bettair-border);
}

.bettair-stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.bettair-stat-item {
  padding: 36px 20px;
  text-align: center;
  border-right: 1px solid var(--bettair-border);
}
.bettair-stat-item:last-child { border-right: none; }

.bettair-stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--bettair-navy);
  letter-spacing: -1px;
}
.bettair-stat-num span { color: var(--bettair-accent); }

.bettair-stat-label {
  font-size: 0.8rem;
  color: var(--bettair-gray);
  margin-top: 6px;
  font-weight: 400;
  line-height: 1.4;
}

/* ── SHARED SECTION ── */
.bettair-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 60px;
}

.bettair-section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--bettair-accent);
  margin-bottom: 14px;
}

.bettair-section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--bettair-navy);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 18px;
}

.bettair-section-body {
  font-size: 1rem;
  color: var(--bettair-gray);
  line-height: 1.8;
  font-weight: 300;
}

/* ── ABOUT DEVICE ── */
.bettair-about {
  background: var(--bettair-white);
  border-top: 1px solid var(--bettair-border);
}

.bettair-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.bettair-device-showcase {
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  border-radius: 28px;
  padding: 50px 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.bettair-device-showcase::after {
  content: '';
  position: absolute;
  bottom: -60px; right: -60px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,180,216,0.12), transparent 70%);
  pointer-events: none;
}

.bettair-device-showcase img {
  width: 280px;
  object-fit: contain;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 12px 30px rgba(0,50,120,0.12));
}

.bettair-cartridge-badge {
  position: absolute;
  bottom: 20px; right: 20px;
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--bettair-navy);
  box-shadow: 0 6px 20px rgba(0,30,80,0.08);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 3;
}

.bettair-about-features {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bettair-feature-pill {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  transition: all 0.22s;
}
.bettair-feature-pill:hover {
  background: var(--bettair-white);
  box-shadow: 0 6px 24px rgba(0,30,80,0.09);
  transform: translateX(5px);
  border-color: rgba(0,180,216,0.3);
}

.bettair-feature-icon {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--bettair-accent), var(--bettair-cyan));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.bettair-feature-text strong {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--bettair-navy);
  margin-bottom: 1px;
}
.bettair-feature-text span {
  font-size: 0.79rem;
  color: var(--bettair-gray);
  line-height: 1.4;
}

/* ── MEASURES ── */
.bettair-measures-wrap {
  background: var(--bettair-muted);
  border-top: 1px solid var(--bettair-border);
}

.bettair-measures-head {
  text-align: center;
  margin-bottom: 56px;
}
.bettair-measures-head .bettair-section-body { margin: 0 auto; max-width: 520px; }

.bettair-pollutants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 14px;
  margin-bottom: 56px;
}

.bettair-pollutant-card {
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  border-radius: 16px;
  padding: 22px 14px;
  text-align: center;
  transition: all 0.22s;
  cursor: default;
}
.bettair-pollutant-card:hover {
  border-color: var(--bettair-accent);
  box-shadow: 0 6px 22px rgba(0,180,216,0.12);
  transform: translateY(-4px);
}

.bettair-pollutant-sym {
  font-family: 'Syne', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--bettair-blue);
  margin-bottom: 7px;
}
.bettair-pollutant-name {
  font-size: 0.72rem;
  color: var(--bettair-gray);
  font-weight: 500;
}
.bettair-pollutant-card.bettair-pm .bettair-pollutant-sym { color: var(--bettair-warn); }
.bettair-pollutant-card.bettair-env .bettair-pollutant-sym { color: var(--bettair-green); }

/* ── SPECS TABLE ── */
.bettair-specs-wrap {
  overflow-x: auto;
  border-radius: 20px;
  border: 1px solid var(--bettair-border);
  box-shadow: 0 8px 32px rgba(0,30,80,0.06);
  background: var(--bettair-white);
}

table.bettair-specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.bettair-specs-table thead {
  background: var(--bettair-navy);
}
.bettair-specs-table thead th {
  padding: 15px 20px;
  color: rgba(255,255,255,0.65);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-align: left;
}
.bettair-specs-table thead th:first-child { color: var(--bettair-accent); }

.bettair-specs-table tbody tr {
  border-bottom: 1px solid rgba(0,100,200,0.06);
  transition: background 0.14s;
}
.bettair-specs-table tbody tr:last-child { border-bottom: none; }
.bettair-specs-table tbody tr:hover { background: rgba(0,180,216,0.04); }

.bettair-specs-table td {
  padding: 13px 20px;
  color: var(--bettair-navy);
}
.bettair-specs-table td:first-child {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--bettair-blue);
  font-size: 0.92rem;
}

/* ── USE CASES ── */
.bettair-usecases-wrap {
  background: var(--bettair-white);
  border-top: 1px solid var(--bettair-border);
}

.bettair-usecases-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 18px;
}

.bettair-usecase-card {
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  border-radius: 20px;
  padding: 30px 26px;
  transition: all 0.22s;
}
.bettair-usecase-card:hover {
  background: var(--bettair-white);
  border-color: rgba(0,180,216,0.35);
  box-shadow: 0 10px 32px rgba(0,30,80,0.09);
  transform: translateY(-4px);
}

.bettair-usecase-emoji {
  font-size: 1.9rem;
  margin-bottom: 16px;
  display: block;
}
.bettair-usecase-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--bettair-navy);
  margin-bottom: 9px;
}
.bettair-usecase-desc {
  font-size: 0.83rem;
  color: var(--bettair-gray);
  line-height: 1.6;
  font-weight: 300;
}

/* ── TECH ── */
.bettair-tech-wrap {
  background: var(--bettair-muted);
  border-top: 1px solid var(--bettair-border);
}

.bettair-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.bettair-tech-diagram {
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  border-radius: 24px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 32px rgba(0,30,80,0.06);
}

.bettair-tech-node {
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  border-radius: 12px;
  padding: 13px 18px;
  display: flex;
  align-items: center;
  gap: 13px;
  transition: transform 0.2s, border-color 0.2s;
}
.bettair-tech-node:hover { transform: translateX(5px); border-color: rgba(0,180,216,0.4); }

.bettair-tech-node-icon {
  width: 36px; height: 36px;
  background: var(--bettair-navy);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}
.bettair-tech-node-title { font-weight: 600; font-size: 0.86rem; color: var(--bettair-navy); }
.bettair-tech-node-sub { font-size: 0.74rem; color: var(--bettair-gray); }

.bettair-tech-arrow {
  width: 2px; height: 14px;
  background: var(--bettair-accent);
  margin-left: 36px;
  opacity: 0.4;
}

.bettair-tech-badges {
  display: flex;
  gap: 10px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.bettair-badge {
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  color: var(--bettair-blue);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
  letter-spacing: 0.04em;
}

/* ── HEALTH ── */
.bettair-health-wrap {
  background: var(--bettair-white);
  border-top: 1px solid var(--bettair-border);
}

.bettair-health-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}

.bettair-health-card {
  background: var(--bettair-muted);
  border: 1px solid var(--bettair-border);
  border-radius: 20px;
  padding: 28px 24px;
  transition: all 0.22s;
}
.bettair-health-card:hover {
  background: var(--bettair-white);
  box-shadow: 0 10px 36px rgba(0,30,80,0.09);
  transform: translateY(-4px);
  border-color: rgba(0,180,216,0.3);
}

.bettair-health-organ { font-size: 1.9rem; margin-bottom: 12px; display: block; }

.bettair-health-pollutant {
  font-family: 'Syne', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  color: var(--bettair-accent);
  text-transform: uppercase;
  margin-bottom: 7px;
}
.bettair-health-effect {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--bettair-navy);
  margin-bottom: 6px;
}
.bettair-health-detail {
  font-size: 0.78rem;
  color: var(--bettair-gray);
  line-height: 1.55;
}

/* ── AWARDS ── */
.bettair-awards-wrap {
  background: var(--bettair-muted);
  border-top: 1px solid var(--bettair-border);
  padding: 80px 60px;
}

.bettair-awards-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.bettair-awards-grid {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.bettair-award-card {
  background: var(--bettair-white);
  border: 1px solid var(--bettair-border);
  border-radius: 20px;
  padding: 36px 40px;
  max-width: 300px;
  transition: all 0.22s;
  box-shadow: 0 4px 16px rgba(0,30,80,0.05);
}
.bettair-award-card:hover {
  border-color: rgba(0,180,216,0.4);
  box-shadow: 0 14px 40px rgba(0,30,80,0.1);
  transform: translateY(-5px);
}

.bettair-award-icon { font-size: 2.4rem; margin-bottom: 14px; }
.bettair-award-name {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--bettair-navy);
  margin-bottom: 8px;
}
.bettair-award-desc { font-size: 0.83rem; color: var(--bettair-gray); line-height: 1.6; }
.bettair-award-year {
  display: inline-block;
  margin-top: 14px;
  background: rgba(0,180,216,0.1);
  color: var(--bettair-accent);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px solid rgba(0,180,216,0.2);
}

/* ── FOOTER ── */
.bettair-footer {
  background: var(--bettair-navy);
  padding: 56px 60px;
}

.bettair-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.bettair-footer-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.5px;
}
.bettair-footer-logo span { color: var(--bettair-accent); }

.bettair-footer-tagline { font-size: 0.8rem; color: rgba(255,255,255,0.35); margin-top: 4px; }

.bettair-footer-links { display: flex; gap: 26px; list-style: none; }
.bettair-footer-links a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  font-size: 0.86rem;
  transition: color 0.2s;
}
.bettair-footer-links a:hover { color: var(--bettair-accent); }

.bettair-footer-contact { text-align: right; }
.bettair-footer-email { color: var(--bettair-accent); font-size: 0.88rem; text-decoration: none; font-weight: 500; }
.bettair-footer-copy { color: rgba(255,255,255,0.22); font-size: 0.76rem; margin-top: 4px; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .bettair-hero-inner,
  .bettair-about-grid,
  .bettair-tech-grid { grid-template-columns: 1fr; gap: 40px; }
  .bettair-hero-visual { display: none; }
  .bettair-section { padding: 70px 28px; }
  .bettair-nav { padding: 18px 28px; }
  .bettair-nav-links { display: none; }
  .bettair-stats-inner { grid-template-columns: repeat(2, 1fr); padding: 0 28px; }
  .bettair-health-grid { grid-template-columns: repeat(2, 1fr); }
  .bettair-awards-wrap { padding: 60px 28px; }
  .bettair-footer { padding: 50px 28px; }
  .bettair-footer-inner { flex-direction: column; align-items: flex-start; }
  .bettair-footer-contact { text-align: left; }
}

@media (max-width: 560px) {
  .bettair-health-grid { grid-template-columns: 1fr; }
  .bettair-stats-inner { grid-template-columns: 1fr 1fr; }
}