:root {
  --bg: #f4f7f3;
  --surface: #ffffff;
  --surface-strong: #0c1f3f;
  --surface-soft: #e4efe9;
  --text: #11233f;
  --text-muted: #50627e;
  --line: #c9d7d0;
  --accent: #3bcf7a;
  --accent-strong: #0f9a58;
  --glow: #56c3ff;
  --warning: #cc4337;
  --shadow-level-1: 0 8px 22px rgba(12, 31, 63, 0.08);
  --shadow-level-2: 0 18px 48px rgba(12, 31, 63, 0.14);
  --shadow-level-3: 0 26px 64px rgba(12, 31, 63, 0.2);
  --shadow-level-4: 0 34px 90px rgba(12, 31, 63, 0.28);
  --radius-sm: 0.75rem;
  --radius-md: 1.125rem;
  --radius-lg: 1.75rem;
  --radius-pill: 999px;
  --shell: 76rem;
  --font-display: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(86, 195, 255, 0.15), transparent 28%),
    linear-gradient(180deg, #fcfdfb 0%, var(--bg) 100%);
  font-family: var(--font-body);
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.skip-link,
.hp-field {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--surface-strong);
  color: var(--surface);
  border-radius: var(--radius-sm);
}

.shell {
  width: min(calc(100% - 2rem), var(--shell));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(252, 253, 251, 0.92);
  border-bottom: 1px solid rgba(17, 35, 63, 0.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.75rem;
}

.brand__logo,
.footer-logo {
  width: min(14rem, 48vw);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a,
.footer-nav a,
.footer-meta a {
  text-decoration: none;
}

.site-nav a:hover,
.footer-nav a:hover,
.footer-meta a:hover {
  color: var(--accent-strong);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  padding: 0.7rem 1rem;
  border-radius: var(--radius-pill);
}

.button {
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:focus-visible,
.menu-toggle:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(86, 195, 255, 0.55);
  outline-offset: 2px;
}

.button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.button--primary {
  color: #071225;
  background: linear-gradient(135deg, #52db88, #3bcf7a);
  box-shadow: var(--shadow-level-1);
}

.button--ghost {
  color: var(--text);
  border-color: rgba(17, 35, 63, 0.14);
  background: rgba(255, 255, 255, 0.84);
}

.hero,
.section {
  padding: 5rem 0;
}

.section--soft {
  background: rgba(255, 255, 255, 0.6);
}

.hero__grid,
.split,
.site-footer__grid {
  display: grid;
  gap: 2.5rem;
}

.hero__grid,
.split {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
}

.hero__copy h1,
.section-heading h2,
.split__content h2,
.beta-modal__content h2,
.privacy-box h3,
.card h3 {
  margin: 0 0 1rem;
  line-height: 1.08;
  font-family: var(--font-display);
}

.hero__copy h1 {
  font-size: clamp(2.8rem, 6vw, 4.9rem);
}

.section-heading h2,
.split__content h2 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero__lede,
.section-heading p,
.split__content p,
.site-footer__summary,
.card p,
.privacy-box p {
  color: var(--text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.8rem 0 2rem;
}

.signal-card,
.card,
.privacy-box,
.beta-panel,
.match-board {
  background: var(--surface);
  border: 1px solid rgba(17, 35, 63, 0.08);
  box-shadow: var(--shadow-level-1);
  border-radius: var(--radius-lg);
}

.signal-card {
  padding: 1.5rem;
  background:
    radial-gradient(circle at top right, rgba(59, 207, 122, 0.12), transparent 28%),
    linear-gradient(180deg, #102549 0%, #0c1f3f 100%);
  color: #f6fbff;
  box-shadow: var(--shadow-level-3);
}

.signal-card__header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.signal-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 16px rgba(59, 207, 122, 0.9);
}

.signal-card__title {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.signal-card__list {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.network-graphic {
  width: 100%;
  height: auto;
  color: rgba(246, 251, 255, 0.85);
}

.network-graphic path {
  fill: none;
  stroke: url(#lineGlow);
  stroke-width: 4;
  stroke-linecap: round;
}

.network-graphic circle {
  fill: rgba(246, 251, 255, 0.12);
  stroke: currentColor;
  stroke-width: 3;
}

.section-heading {
  max-width: 44rem;
  margin-bottom: 2rem;
}

.card-grid {
  display: grid;
  gap: 1.25rem;
}

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

.card {
  padding: 1.5rem;
}

.card--accent {
  border-top: 4px solid var(--accent);
}

.feature-list,
.privacy-points {
  display: grid;
  gap: 0.8rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li,
.privacy-points li {
  padding: 0.9rem 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(17, 35, 63, 0.08);
  border-radius: var(--radius-md);
}

.match-board {
  padding: 1.5rem;
  background:
    linear-gradient(180deg, rgba(92, 201, 255, 0.1), rgba(255, 255, 255, 0.95)),
    var(--surface);
}

.route {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  justify-content: center;
  padding: 1.1rem;
  border-radius: var(--radius-md);
}

.route + .route {
  margin-top: 1rem;
}

.route span {
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--surface);
  box-shadow: var(--shadow-level-1);
}

.route--direct {
  border: 1px solid rgba(59, 207, 122, 0.25);
}

.route--multi {
  border: 1px solid rgba(86, 195, 255, 0.25);
}

.beta-panel {
  padding: 2rem;
}

.beta-form {
  display: grid;
  gap: 0.9rem;
}

.beta-form__row {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.beta-form__row--stacked {
  grid-template-columns: 1fr;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field label,
.checkbox {
  font-weight: 600;
}

.field input[type="email"],
.hp-field input {
  min-height: 3.25rem;
  padding: 0.8rem 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.beta-form__details {
  display: grid;
  gap: 0.75rem;
}

.checkbox {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.checkbox input {
  margin-top: 0.2rem;
}

.beta-form__note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.beta-form__status {
  min-height: 1.5rem;
  margin: 0;
  font-weight: 600;
}

.beta-form__status[data-state="success"] {
  color: var(--accent-strong);
}

.beta-form__status[data-state="error"] {
  color: var(--warning);
}

.beta-form__status[data-state="loading"] {
  color: var(--text-muted);
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(17, 35, 63, 0.08);
  background: rgba(255, 255, 255, 0.82);
}

.site-footer__grid {
  grid-template-columns: minmax(0, 1.4fr) auto auto;
  align-items: start;
}

.footer-nav,
.footer-meta {
  display: grid;
  gap: 0.65rem;
}

.beta-modal {
  width: min(calc(100% - 2rem), 36rem);
  padding: 0;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-level-4);
}

.beta-modal::backdrop {
  background: rgba(7, 18, 37, 0.55);
  backdrop-filter: blur(8px);
}

.beta-modal__frame {
  display: flex;
  justify-content: flex-end;
  margin: 0;
  padding: 0.9rem 0.9rem 0 0.9rem;
}

.beta-modal__close {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.beta-modal__content {
  padding: 0 1.5rem 1.5rem;
}

@media (max-width: 900px) {
  .hero__grid,
  .split,
  .site-footer__grid,
  .card-grid--three {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 4rem 0;
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(17, 35, 63, 0.08);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-level-2);
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.is-open {
    display: flex;
  }

  .beta-form__row {
    grid-template-columns: 1fr;
  }

  .hero__copy h1 {
    font-size: clamp(2.4rem, 12vw, 3.4rem);
  }
}