:root {
  --bg-sky-top: #EAF6FF;
  --bg-sky-bottom: #FFFFFF;
  --ink: #16324F;
  --ink-soft: #4A6178;
  --accent: #2E86AB;
  --accent-dark: #21678A;
  --aqi-green: #6FCF97;
  --aqi-yellow: #F2C94C;
  --aqi-orange: #F2994A;
  --card-bg: #FFFFFF;
  --border-soft: #D9EAF5;
  --error: #C0392B;

  --font-display: "Sora", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: linear-gradient(180deg, var(--bg-sky-top) 0%, var(--bg-sky-bottom) 420px);
  background-repeat: no-repeat;
  line-height: 1.6;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

/* Hero */

.hero {
  text-align: center;
  padding-bottom: 32px;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin: 0 0 16px;
}

.headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.headline .dot {
  color: var(--accent);
  font-weight: 600;
}

.subheadline {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 3vw, 1.25rem);
  color: var(--ink-soft);
  margin: 0;
  font-weight: 400;
}

/* AQI signature gradient bar */

.aqi-bar {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--aqi-green) 0%, var(--aqi-yellow) 55%, var(--aqi-orange) 100%);
  margin: 8px 0 48px;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.aqi-marker {
  position: absolute;
  top: 50%;
  left: 12%;
  width: 14px;
  height: 14px;
  background: #FFFFFF;
  border: 3px solid var(--aqi-green);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 4px rgba(111, 207, 151, 0.18);
}

/* Value points */

.value-points {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding: 8px 0 56px;
}

.point {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #F0F8FD;
  border: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-dark);
}

.icon svg {
  width: 20px;
  height: 20px;
}

.point-text h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 4px 0 8px;
  color: var(--ink);
}

.point-text p {
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.trend-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.trend-link:hover,
.trend-link:focus-visible {
  border-bottom-color: var(--accent);
}

/* CTA / Form */

.cta-form {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 36px 28px;
  box-shadow: 0 12px 32px -20px rgba(22, 50, 79, 0.25);
}

.cta-form h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 8px;
  text-align: center;
}

.cta-sub {
  text-align: center;
  color: var(--ink-soft);
  margin: 0 0 28px;
  font-size: 0.97rem;
}

.form-embed {
  width: 100%;
}

.form-embed iframe {
  width: 100%;
  min-height: 820px;
  border: 0;
  border-radius: 12px;
  display: block;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Footer */

.footer {
  text-align: center;
  margin-top: 40px;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

/* Reduced motion */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}

/* Mobile */

@media (max-width: 480px) {
  .page {
    padding: 48px 18px 36px;
  }
  .point {
    gap: 14px;
  }
  .cta-form {
    padding: 28px 20px;
  }
}