:root {
  --bg: #f8fafc;
  --panel: #ffffff;
  --panel-2: #f1f5f9;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #0284c7;
  --accent-2: #0ea5e9;
  --ok: #16a34a;
  --watch: #d97706;
  --puffed: #dc2626;
  --border: #e2e8f0;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b1120;
  --panel: #151f32;
  --panel-2: #1c2940;
  --text: #e2e8f0;
  --muted: #8fa1b8;
  --accent: #38bdf8;
  --accent-2: #7dd3fc;
  --ok: #4ade80;
  --watch: #fbbf24;
  --puffed: #f87171;
  --border: #263349;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1120;
    --panel: #151f32;
    --panel-2: #1c2940;
    --text: #e2e8f0;
    --muted: #8fa1b8;
    --accent: #38bdf8;
    --accent-2: #7dd3fc;
    --ok: #4ade80;
    --watch: #fbbf24;
    --puffed: #f87171;
    --border: #263349;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.3);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background-color 0.2s ease, color 0.2s ease;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

h1, h2, h3 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
  color: var(--muted);
  line-height: 1.6;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Icons */
.icon {
  width: 20px;
  height: 20px;
  color: currentColor;
  flex-shrink: 0;
}

.icon--lg {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #04263a;
  box-shadow: var(--shadow);
}

.btn--secondary {
  background: var(--panel-2);
  color: var(--text);
  border-color: var(--border);
}

.btn--lg {
  padding: 13px 24px;
  font-size: 15px;
}

.btn--block {
  width: 100%;
}

.iconBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

/* Announcement strip */
.announce {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #ffffff;
}

.announce__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding: 10px 24px;
  text-align: center;
  font-size: 0.9rem;
}

.announce__badge {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.announce__text {
  font-weight: 500;
}

.earlyAdopterNote {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
}

.earlyAdopterNote .announce__badge {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  border-radius: 8px;
  flex-shrink: 0;
}

.brand__word {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 800;
  font-size: 14px;
  line-height: 1.05;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
}

.nav__links a:hover {
  color: var(--accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon--moon {
  display: none;
}

:root[data-theme="dark"] .icon--sun {
  display: none;
}

:root[data-theme="dark"] .icon--moon {
  display: block;
}

.hide-desktop {
  display: none;
}

@media (max-width: 860px) {
  .nav__links {
    position: fixed;
    inset: 68px 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 20px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.15s ease, opacity 0.15s ease;
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__links a {
    padding: 10px 0;
    width: 100%;
  }

  .hide-mobile {
    display: none;
  }

  .hide-desktop {
    display: inline-flex;
  }
}

/* Hero */
.hero {
  padding: 64px 0 40px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.08;
}

.hero__sub {
  font-size: 17px;
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0 12px;
}

.hero__note {
  font-size: 13px;
  margin: 0;
}

.hero__visual {
  display: flex;
  justify-content: center;
}

.deviceCard {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.deviceCard__row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: 10px;
  background: var(--panel-2);
}

.deviceCard__text {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.deviceCard__text strong {
  font-size: 13.5px;
  font-weight: 600;
}

.deviceCard__text span {
  font-size: 12px;
  color: var(--muted);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  flex-shrink: 0;
}

.dot--ok { background: var(--ok); }
.dot--watch { background: var(--watch); }
.dot--puffed { background: var(--puffed); }
.dot--retired { background: var(--muted); }

.badge {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.badge--ok {
  background: color-mix(in srgb, var(--ok) 15%, transparent);
  color: var(--ok);
}

.badge--watch {
  background: color-mix(in srgb, var(--watch) 15%, transparent);
  color: var(--watch);
}

.badge--puffed {
  background: color-mix(in srgb, var(--puffed) 15%, transparent);
  color: var(--puffed);
}

@media (max-width: 860px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    order: -1;
  }
}

/* Why */
.why {
  padding: 20px 0 60px;
}

.why__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.why__card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.why__card h3 {
  font-size: 17px;
  margin: 14px 0 8px;
}

.why__card p {
  font-size: 14px;
  margin: 0;
}

@media (max-width: 860px) {
  .why__inner {
    grid-template-columns: 1fr;
  }
}

/* Sections */
.section {
  padding: 72px 0;
}

.section--alt {
  background: var(--panel-2);
}

.section__title {
  font-size: clamp(24px, 3.4vw, 34px);
  text-align: center;
}

.section__sub {
  text-align: center;
  max-width: 56ch;
  margin: 0 auto 44px;
  font-size: 15.5px;
}

/* Feature grid */
.featureGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.featureCard {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.featureCard__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.featureCard h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.featureCard p {
  font-size: 14px;
  margin: 0;
}

@media (max-width: 860px) {
  .featureGrid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 861px) and (max-width: 1080px) {
  .featureGrid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Presets */
.presetGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.presetCard {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.presetCard__chem {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.presetCard h3 {
  font-size: 15.5px;
  margin-bottom: 6px;
}

.presetCard__interval {
  font-weight: 600;
  font-size: 13.5px;
  color: var(--text);
  margin: 0 0 6px;
}

.presetCard__note {
  font-size: 13px;
  margin: 0;
}

@media (max-width: 860px) {
  .presetGrid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 861px) and (max-width: 1080px) {
  .presetGrid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.step {
  text-align: center;
  padding: 0 12px;
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #04263a;
  font-weight: 800;
  font-family: "Space Grotesk", sans-serif;
  margin-bottom: 14px;
}

.step h3 {
  font-size: 16px;
}

.step p {
  font-size: 14px;
}

@media (max-width: 860px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* Pricing */
.billingToggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
}

.billingToggle__btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.billingToggle__btn.is-active {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #04263a;
  border-color: transparent;
}

.billingToggle__badge {
  font-size: 11px;
  font-weight: 700;
  background: color-mix(in srgb, #04263a 12%, transparent);
  padding: 2px 6px;
  border-radius: 999px;
}

.billingToggle__btn:not(.is-active) .billingToggle__badge {
  background: color-mix(in srgb, var(--ok) 18%, transparent);
  color: var(--ok);
}

.pricingGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.priceCard {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.priceCard--featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.priceCard__flag {
  position: absolute;
  top: -12px;
  left: 24px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #04263a;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.priceCard h3 {
  font-size: 18px;
}

.priceCard__price {
  margin: 4px 0 20px;
}

.priceCard__amount {
  font-family: "Space Grotesk", sans-serif;
  font-size: 34px;
  font-weight: 800;
}

.priceCard__suffix {
  font-size: 14px;
  color: var(--muted);
  margin-left: 4px;
}

.priceCard__features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.priceCard__features li {
  font-size: 14px;
  padding-left: 24px;
  position: relative;
}

.priceCard__features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

.priceCard__features li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 6px;
  height: 3px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

@media (max-width: 860px) {
  .pricingGrid {
    grid-template-columns: 1fr;
  }

  .priceCard--featured {
    transform: none;
  }
}

@media (min-width: 861px) and (max-width: 1080px) {
  .pricingGrid {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }
}

/* Safety */
.safety__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.safety .section__title,
.safety .section__sub {
  text-align: left;
  margin: 0 0 16px;
}

.safety__states {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.safety__state {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.safety__state .dot {
  margin-top: 5px;
}

.safety__state strong {
  font-size: 14px;
}

.safety__state p {
  font-size: 13px;
  margin: 2px 0 0;
}

@media (max-width: 860px) {
  .safety__inner {
    grid-template-columns: 1fr;
  }
}

/* FAQ */
.faq {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faqItem {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
}

.faqItem summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
}

.faqItem summary::-webkit-details-marker {
  display: none;
}

.faqItem summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 700;
}

.faqItem[open] summary::after {
  content: "\2212";
}

.faqItem p {
  margin: 10px 0 0;
  font-size: 14px;
}

/* Final CTA */
.finalCta {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 12%, var(--bg)), var(--bg));
}

.finalCta h2 {
  font-size: clamp(26px, 4vw, 38px);
}

.finalCta p {
  font-size: 16px;
  margin-bottom: 24px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.brand--footer .brand__word {
  font-size: 12px;
}

.footer__links {
  display: flex;
  gap: 20px;
  font-size: 13px;
}

.footer__links a:hover {
  color: var(--accent);
}

.footer__copy {
  font-size: 12px;
  margin: 0;
  color: var(--muted);
}