:root {
  --color-primary: #03363D;
  --color-accent: #BDD9D7;
  --color-bg: #F5FCFC;
  --color-surface: #FFFFFF;
  --color-text: #202125;
  --color-text-muted: #5C6B63;
  --color-border: rgba(0, 0, 0, .08);
  --color-success: #2E7D5B;
  --color-error: #C4453B;

  --font-heading: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius: 14px;
  --shadow: 0 6px 24px rgba(0, 0, 0, .06);
  --maxw: 1080px;
  --space: clamp(16px, 4vw, 40px);
  --nav-height: 76px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-block-start: var(--nav-height);
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

[id] {
  scroll-margin-top: var(--nav-height);
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  margin: 0 0 .5em;
}

p {
  margin: 0 0 1em;
}

a {
  color: inherit;
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus visibility for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.section__inner {
  max-inline-size: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space);
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  text-align: center;
  margin-block-end: clamp(24px, 4vw, 48px);
}

/* Nav */
.nav {
  position: fixed;
  inset-inline: 0;
  inset-block-start: 0;
  z-index: 50;
  block-size: var(--nav-height);
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border-block-end: 1px solid var(--color-border);
}

.nav__inner {
  inline-size: 100%;
  max-inline-size: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav__links a:not(.btn) {
  text-decoration: none;
  font-weight: 600;
  font-size: .95rem;
  color: var(--color-text);
}

.nav__links .btn {
  padding: 10px 18px;
  font-size: .9rem;
}

.nav__signup {
  display: none;
}

.nav__links .waitlist-form__input {
  padding: 10px 14px;
  font-size: .9rem;
  flex: 1 1 160px;
}

.nav__signup .success-card {
  padding: 14px 16px;
  margin-block-start: 0;
}

.nav__signup .success-card__title {
  font-size: .95rem;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: var(--color-bg);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px;
  cursor: pointer;
}

.nav__toggle-bar {
  inline-size: 20px;
  block-size: 2px;
  background: var(--color-primary);
}

@media (max-width: 699px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: absolute;
    inset-inline: var(--space);
    inset-block-start: calc(100% + 10px);
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    z-index: 10;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform .25s ease, opacity .25s ease, visibility .25s;
  }

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

  .nav__links .nav__cta {
    display: none;
  }

  .nav__signup {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
}

.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: end;
}

.brand {
  margin-left: -0.6rem;
}

.brand__footer {
  margin-left: -0.4rem;
  font-size: 1rem;
  margin-bottom: -0.2rem;
}

/* Hero */
.hero {
  padding-block: clamp(24px, 5vw, 64px);
}

.hero__inner {
  max-inline-size: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 48px);
  align-items: center;
}

@media (min-width: 900px) {
  .hero__inner {
    grid-template-columns: 1.1fr .9fr;
  }
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
}

.hero__subhead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-muted);
  max-inline-size: 42ch;
}

.hero__social-proof {
  color: var(--color-text-muted);
  font-size: .9rem;
  margin-block-start: 12px;
}

.hero__visual {
  display: flex;
  justify-content: center;
  overflow: auto;

  img {
    overflow: auto;
  }
}

.mockup-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  padding: 28px;
  inline-size: min(360px, 100%);
}

.mockup-card__dot {
  display: inline-block;
  inline-size: 10px;
  block-size: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-inline-end: 6px;
}

.mockup-card__line {
  block-size: 12px;
  border-radius: 6px;
  background: var(--color-bg);
  margin-block-start: 16px;
}

.mockup-card__line--title {
  block-size: 18px;
  inline-size: 70%;
  background: var(--color-accent);
}

.mockup-card__line--short {
  inline-size: 50%;
}

/* Buttons */
.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius);
  padding: 14px 24px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-bg);
}

.btn--primary:hover {
  opacity: .92;
}

.btn:disabled {
  opacity: .7;
  cursor: not-allowed;
}

.btn__spinner {
  display: none;
  inline-size: 16px;
  block-size: 16px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-inline-start-color: transparent;
  animation: spin .6s linear infinite;
}

.btn--loading .btn__spinner {
  display: inline-block;
}

.btn--loading .btn__label::after {
  content: '…';
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Waitlist form */
.waitlist-form__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.waitlist-form__input {
  flex: 1 1 240px;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.waitlist-form__input:invalid[aria-invalid="true"] {
  border-color: var(--color-error);
}

.waitlist-form__trust {
  font-size: .85rem;
  color: var(--color-text-muted);
  margin-block-start: 10px;
  margin-block-end: 0;
}

.waitlist-form__error {
  color: var(--color-error);
  font-size: .9rem;
  min-block-size: 1.2em;
  margin-block-start: 8px;
  margin-block-end: 0;
}

.honeypot {
  position: absolute;
  inset-inline-start: -9999px;
  block-size: 1px;
  inline-size: 1px;
  overflow: hidden;
}

/* Success card */
.success-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-block-start: 16px;
  margin-inline: auto;
  max-width: 30em;
}

.success-card__title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.25rem;
}

/* Benefit cards */
.benefits {
  padding-block: clamp(32px, 6vw, 72px);
}

.benefits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 700px) {
  .benefits__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.benefit-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  padding: 28px;
  text-align: start;
}

.benefit-card__icon {
  font-size: 1.75rem;
  margin-block-end: 12px;
}

.benefit-card__title {
  font-size: 1.1rem;
}

.benefit-card__body {
  color: var(--color-text-muted);
  margin: 0;
}

/* Steps */
.steps {
  padding-block: clamp(32px, 6vw, 72px);
}

.steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 700px) {
  .steps__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  text-align: center;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 36px;
  block-size: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-bg);
  font-weight: 700;
  margin-block-end: 12px;
}

.step__text {
  color: var(--color-text-muted);
}

/* Early access */
.early-access {
  padding-block: clamp(24px, 4vw, 48px);
}

.early-access__text {
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-primary);
  font-family: var(--font-heading);
  max-inline-size: 60ch;
  margin-inline: auto;
}

/* CTA band */
.cta-band {
  background: var(--color-surface);
  padding-block: clamp(32px, 6vw, 64px);
  text-align: center;
}

.cta-band .waitlist-form {
  max-inline-size: 520px;
  margin-inline: auto;
}

.cta-band .waitlist-form__row {
  justify-content: center;
}

.cta-band .success-card {
  text-align: start;
}

/* FAQ */
.faq {
  padding-block: clamp(32px, 6vw, 72px);
}

.faq__list {
  max-inline-size: 720px;
  margin-inline: auto;
}

.faq-item {
  border-block-end: 1px solid var(--color-border);
  padding-block: 16px;
}

.faq-item__q {
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-heading);
}

.faq-item__a {
  color: var(--color-text-muted);
  margin-block-start: 10px;
  margin-block-end: 0;
}

/* Footer */
.footer {
  padding-block: 32px;
  border-block-start: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-size: .85rem;
}

.footer__logo {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--color-primary);
}

.footer__links {
  display: flex;
  gap: 16px;
}

.footer__link {
  text-decoration: none;
}

.footer__link:hover {
  text-decoration: underline;
}