@font-face {
  font-family: "Atkinson";
  src: url("./fonts/atkinson-regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson";
  src: url("./fonts/atkinson-bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-top: #f8fbff;
  --bg-mid: #f3f7fc;
  --bg-bottom: #edf2f8;
  --page-max-width: 78rem;
  --surface: rgba(255, 255, 255, 0.95);
  --surface-alt: rgba(255, 255, 255, 0.9);
  --border: rgba(227, 232, 238, 0.8);
  --border-strong: rgba(181, 240, 255, 0.75);
  --text: #16191f;
  --text-strong: #05070c;
  --text-soft: #3f4751;
  --text-muted: #55606c;
  --brand-100: #d6f5ff;
  --brand-200: #b5f0ff;
  --brand-300: #5ce1ff;
  --brand-500: #1ebfff;
  --brand-600: #06a3ff;
  --brand-700: #0090ff;
  --brand-950: #0e385d;
  --shadow-lg: 0 24px 64px rgba(13, 93, 155, 0.08);
  --shadow-md: 0 16px 32px rgba(22, 25, 31, 0.07);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-pill: 999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Atkinson", "Graphik", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(0, 144, 255, 0.16), transparent 32%),
    radial-gradient(circle at 86% 8%, rgba(94, 58, 237, 0.08), transparent 36%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 50%, var(--bg-bottom) 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

.page-shell {
  min-height: 100vh;
  padding: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-top: 0.25rem;
}

.site-nav {
  width: min(100%, var(--page-max-width));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.25rem;
  border: 1px solid rgba(227, 232, 238, 0.7);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
}

.brand-logo {
  width: 3rem;
  height: 3rem;
  padding: 0.25rem;
}

.brand-copy {
  display: grid;
  gap: 0.125rem;
  line-height: 1.1;
}

.brand-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-strong);
}

.brand-subtitle {
  font-size: 0.65rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 5.5rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-pill);
  background: rgba(214, 245, 255, 0.8);
  color: var(--brand-700);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero {
  width: min(100%, var(--page-max-width));
  margin: 0 auto;
  padding: 3.75rem 0 1.5rem;
  display: grid;
  gap: 1.5rem;
  align-items: start;
  grid-template-columns: minmax(0, 0.92fr) minmax(28rem, 1.08fr);
}

.surface-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.surface-panel {
  border: 1px solid rgba(227, 232, 238, 0.7);
  border-radius: var(--radius-lg);
  background: var(--surface-alt);
  box-shadow: var(--shadow-md);
}

.hero-copy,
.signup {
  padding: clamp(1.75rem, 4vw, 3rem);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 12ch;
  color: var(--text-strong);
  font-size: clamp(2.8rem, 6vw, 4.9rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

h2 {
  color: var(--text-strong);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.05;
}

.intro,
.signup-copy,
.signup-help,
.footer-card {
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

.intro {
  max-width: 34rem;
  margin-top: 1.5rem;
}

.signup {
  display: grid;
  gap: 1rem;
  background:
    linear-gradient(135deg, rgba(237, 251, 255, 0.92), rgba(255, 255, 255, 0.95) 52%),
    var(--surface);
}

.signup-frame {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 750px;
  border: 0;
  border-radius: var(--radius-lg);
}

.signup-form {
  display: grid;
  gap: 0.875rem;
  margin-top: 0.5rem;
}

.signup-form input {
  width: 100%;
  min-height: 3.4rem;
  padding: 0 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.94);
  color: var(--text-strong);
  font: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.signup-form input::placeholder {
  color: rgba(85, 96, 108, 0.75);
}

.signup-form input:focus-visible,
.signup-form button:focus-visible,
.signup-help a:focus-visible,
.footer-card a:focus-visible,
.brand:focus-visible {
  outline: 2px solid var(--brand-300);
  outline-offset: 3px;
}

.signup-form button {
  min-height: 3.4rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--brand-500);
  color: var(--brand-950);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
  box-shadow: 0 12px 24px rgba(30, 191, 255, 0.24);
}

.signup-form button:hover {
  transform: translateY(-1px);
  background: var(--brand-300);
}

.privacy-note {
  padding: 1rem 1.1rem;
  color: #30363f;
  font-size: 0.95rem;
  line-height: 1.65;
}

.signup-help {
  font-size: 0.95rem;
}

.signup-help a,
.footer-card a {
  color: var(--brand-700);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.site-footer {
  width: min(100%, var(--page-max-width));
  margin: 0 auto;
  padding: 0 0 1rem;
}

.footer-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  font-size: 0.95rem;
}

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

@media (max-width: 860px) {
  .hero {
    padding-top: 2.25rem;
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 14ch;
  }

  .footer-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 0.75rem;
  }

  .site-nav {
    padding: 0.9rem 1rem;
  }

  .brand-subtitle {
    font-size: 0.58rem;
    letter-spacing: 0.18em;
  }

  .brand-mark {
    min-width: auto;
    padding: 0.65rem 0.85rem;
  }

  .hero-copy,
  .signup {
    padding: 1.5rem;
  }

  .intro,
  .signup-copy,
  .signup-help {
    font-size: 1rem;
  }

  .signup-frame {
    height: 980px;
  }
}

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

  .signup-form button {
    transition: none;
  }

  .signup-form button:hover {
    transform: none;
  }
}