:root {
  --bg: #fafafa;
  --card: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --accent: #7c3aed;
  --accent-soft: #ede9fe;
  --border: #e5e7eb;
  --shadow: 0 20px 60px rgba(17, 24, 39, 0.06);
  --bg-glow-a: rgba(124, 58, 237, 0.14);
  --bg-glow-b: rgba(236, 72, 153, 0.12);
}

[data-theme="dark"] {
  --bg: #0b0b10;
  --card: #14141c;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --accent: #a78bfa;
  --accent-soft: rgba(167, 139, 250, 0.12);
  --border: #26262f;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --bg-glow-a: rgba(167, 139, 250, 0.12);
  --bg-glow-b: rgba(236, 72, 153, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(920px, 100% - 3rem);
  margin-inline: auto;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(40rem 40rem at 15% -10%, var(--bg-glow-a), transparent 60%),
    radial-gradient(40rem 40rem at 85% 110%, var(--bg-glow-b), transparent 60%);
  pointer-events: none;
}

.nav {
  padding: 1.5rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
}

.accent {
  color: var(--accent);
}

.theme-toggle {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 0.75rem;
  cursor: pointer;
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.icon-sun {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: block;
}

[data-theme="dark"] .icon-moon {
  display: none;
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 0 4rem;
}

.eyebrow {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.title {
  font-size: clamp(3rem, 10vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
}

.subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--muted);
  line-height: 1.7;
  max-width: 34rem;
  margin-bottom: 2.75rem;
}

.subtitle strong {
  color: var(--text);
  font-weight: 600;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.6rem;
  border-radius: 0.9rem;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn svg {
  width: 1.1rem;
  height: 1.1rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 30px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(124, 58, 237, 0.45);
}

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.footer {
  padding: 2rem 0 2.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.fade-in {
  animation: fadeIn 0.8s ease both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}