:root {
  --sm-teal-500: #15c8ae;
  --sm-teal-400: #31e0c9;
  --sm-teal-300: #8cf9e8;
  --ink-950: #071218;
  --ink-900: #0d1d29;
  --ink-800: #143245;
  --ink-700: #1a425b;
  --text-100: #f3fbff;
  --text-300: #d2e4f1;
  --text-500: #9db8cb;
  --danger-400: #ff7b7b;
  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.4rem;
  --shadow-card: 0 14px 30px rgba(0, 0, 0, 0.28);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text-100);
  background:
    radial-gradient(circle at 15% -10%, rgba(21, 200, 174, 0.24), transparent 45%),
    radial-gradient(circle at 100% 0%, rgba(28, 103, 138, 0.22), transparent 42%),
    linear-gradient(165deg, var(--ink-950), #061017 65%);
  font-family: "Avenir Next", "Segoe UI", Tahoma, "Trebuchet MS", sans-serif;
  line-height: 1.45;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
    to right,
    rgba(140, 249, 232, 0.06) 1px,
    transparent 1px
  );
  background-size: 38px 38px;
  opacity: 0.18;
  z-index: -1;
}

a,
button,
input {
  font: inherit;
}

a {
  color: inherit;
}

.site-shell {
  max-width: 76rem;
  margin: 0 auto;
  padding: 0.75rem 0.8rem 2rem;
}

.site-header {
  position: sticky;
  top: 0.6rem;
  z-index: 12;
  margin-bottom: 0.9rem;
  border: 1px solid rgba(140, 249, 232, 0.18);
  border-radius: 999px;
  padding: 0.5rem 0.65rem;
  backdrop-filter: blur(12px);
  background: rgba(7, 18, 24, 0.82);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.9rem;
}

.brand {
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.top-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-300);
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.top-nav a:hover {
  color: var(--text-100);
  background: rgba(140, 249, 232, 0.12);
}

.card {
  border: 1px solid rgba(140, 249, 232, 0.16);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(13, 29, 41, 0.95), rgba(7, 22, 31, 0.98));
  box-shadow: var(--shadow-card);
}

.hero,
.section,
.site-footer {
  padding: 1.1rem;
}

.hero {
  position: relative;
  overflow: clip;
}

.hero::after {
  content: "";
  position: absolute;
  right: -5rem;
  top: -5rem;
  width: 12rem;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(49, 224, 201, 0.26), rgba(49, 224, 201, 0));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 0.28rem 0.63rem;
  border-radius: 999px;
  border: 1px solid rgba(140, 249, 232, 0.42);
  background: rgba(49, 224, 201, 0.16);
  color: var(--sm-teal-300);
  font-weight: 700;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pill {
  width: max-content;
  margin: 0.62rem 0 0;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(140, 249, 232, 0.6);
  color: #d7fff7;
  background: linear-gradient(180deg, rgba(49, 224, 201, 0.24), rgba(21, 200, 174, 0.1));
  font-size: 0.84rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  margin-top: 1rem;
  font-size: clamp(1.95rem, 9vw, 3.7rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.3rem, 5.4vw, 2rem);
}

h3 {
  font-size: 1.06rem;
}

p {
  margin: 0;
}

.subheadline {
  margin-top: 0.85rem;
  max-width: 39rem;
  color: var(--text-300);
  font-size: clamp(1rem, 4.2vw, 1.22rem);
}

.cta-row {
  margin-top: 1.3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 0.72rem 1rem;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary {
  color: #042319;
  background: linear-gradient(180deg, var(--sm-teal-400), var(--sm-teal-500));
}

.btn-secondary {
  color: var(--text-100);
  border-color: rgba(140, 249, 232, 0.36);
  background: rgba(49, 224, 201, 0.04);
}

.btn-secondary:hover {
  background: rgba(49, 224, 201, 0.13);
}

.section {
  margin-top: 1rem;
}

.features-grid {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.72rem;
}

.feature-card {
  border: 1px solid rgba(140, 249, 232, 0.18);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  background: linear-gradient(175deg, rgba(20, 50, 69, 0.92), rgba(14, 36, 51, 0.95));
}

.feature-card p {
  margin-top: 0.4rem;
  color: var(--text-300);
  font-size: 0.93rem;
}

.sync-callout {
  margin-top: 1rem;
  border: 1px solid rgba(140, 249, 232, 0.52);
  border-radius: var(--radius-md);
  background: linear-gradient(165deg, rgba(21, 200, 174, 0.16), rgba(49, 224, 201, 0.07));
  padding: 0.9rem;
}

.sync-callout p {
  margin-top: 0.35rem;
  color: #d8fff7;
}

.waitlist-form {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.62rem;
}

.waitlist-form label {
  font-weight: 600;
}

.form-row {
  display: grid;
  gap: 0.62rem;
}

input[type="email"] {
  width: 100%;
  border: 1px solid rgba(140, 249, 232, 0.22);
  border-radius: var(--radius-sm);
  background: var(--ink-900);
  color: var(--text-100);
  padding: 0.76rem 0.78rem;
}

input[type="email"]::placeholder {
  color: var(--text-500);
}

input[aria-invalid="true"] {
  border-color: var(--danger-400);
}

.error-text {
  min-height: 1.2rem;
  color: var(--danger-400);
  font-size: 0.9rem;
}

.form-note {
  color: var(--text-500);
  font-size: 0.88rem;
}

.status-text {
  min-height: 1.2rem;
  color: var(--sm-teal-300);
  font-size: 0.92rem;
}

.contact-actions {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.72rem;
}

.contact-actions p {
  color: var(--text-300);
}

.contact-actions a {
  color: #d9fff7;
  font-weight: 600;
}

.copy-btn {
  margin-left: 0.45rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(140, 249, 232, 0.35);
  background: rgba(49, 224, 201, 0.1);
  color: var(--text-100);
  font-size: 0.78rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: rgba(49, 224, 201, 0.2);
}

.site-footer {
  margin-top: 1rem;
  border: 1px solid rgba(140, 249, 232, 0.16);
  border-radius: var(--radius-lg);
  background: rgba(13, 29, 41, 0.87);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--text-500);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translate(-50%, 140%);
  border-radius: 999px;
  border: 1px solid rgba(140, 249, 232, 0.4);
  background: rgba(7, 18, 24, 0.96);
  color: var(--text-100);
  padding: 0.5rem 0.9rem;
  font-weight: 600;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--sm-teal-300);
  outline-offset: 2px;
}

@media (min-width: 48rem) {
  .site-shell {
    padding: 1.1rem 1.2rem 2.5rem;
  }

  .hero,
  .section,
  .site-footer {
    padding: 1.5rem;
  }

  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-row {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
}

@media (min-width: 90rem) {
  .site-shell {
    padding-top: 1.4rem;
  }

  .hero {
    padding: 2.1rem;
  }

  .features-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}