@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600&family=IBM+Plex+Serif:wght@400;500&display=swap");

:root {
  --bg: #f7f5f2;
  --surface: #ffffff;
  --ink: #1c1f24;
  --muted: #5f6672;
  --line: #e4e0da;
  --accent: #1f3b63;
  --accent-2: #2f4e76;
  --shadow: 0 12px 30px rgba(23, 30, 45, 0.08);
  --shadow-lg: 0 18px 40px rgba(23, 30, 45, 0.12);
  --radius: 18px;

  --primary: var(--accent);
  --primary-dark: var(--accent-2);
  --secondary: var(--muted);
  --text-primary: var(--ink);
  --text-secondary: var(--muted);
  --bg-light: #f9f7f3;
  --bg-white: var(--surface);
  --border: var(--line);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: radial-gradient(circle at top, #fbfaf7 0%, var(--bg) 55%, #f1efe9 100%);
}

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

a:hover,
a:focus {
  color: var(--text-primary);
}

header {
  position: static;
  padding: 32px 0 16px;
  background: transparent;
  border: none;
}

header .header-content,
header .nav,
header .header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 22px;
  box-shadow: var(--shadow);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 4rem 0;
}

h1, h2, h3, h4 {
  font-family: "IBM Plex Serif", "Georgia", serif;
  line-height: 1.2;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 3vw, 2.75rem); }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

nav a,
.nav a,
.menu a {
  color: var(--muted);
  padding: 6px 8px;
  border-radius: 12px;
}

nav a:hover,
nav a:focus,
.nav a:hover,
.nav a:focus,
.menu a:hover,
.menu a:focus {
  color: var(--text-primary);
  background: #f1efe9;
}

.btn,
button,
input[type="submit"] {
  font-family: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary,
button.primary,
input[type="submit"] {
  background: var(--accent);
  color: #ffffff;
}

.btn-secondary,
button.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text-primary);
}

.card,
.pricing-card,
.waitlist-card,
.highlight-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.badge {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-2);
}

footer {
  padding: 40px 0 60px;
  color: var(--muted);
  font-size: 0.95rem;
}

footer a {
  color: inherit;
  font-weight: 500;
}

body.platform-windows,
body.platform-ios,
body.platform-android,
body.platform-linux {
  --primary: var(--accent);
  --primary-dark: var(--accent-2);
  --secondary: var(--muted);
  --bg-light: #f9f7f3;
}

body.platform-windows .hero,
body.platform-ios .hero,
body.platform-android .hero,
body.platform-linux .hero {
  background: transparent;
}

@media (max-width: 720px) {
  header .header-content,
  header .nav,
  header .header {
    padding: 14px 16px;
  }
}