/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* U0U BaseLine Brand Palette
   * Background:  0d0a1b,#100a17, #0f0a18, #100919, #100b19 #100a16 #0e0918(canonical - banner matched)
   * Electric blue: #4DA3FF
   * Indigo/violet: #6A5CFF
   */
  --color-bg: #100c19;
  --color-surface: #161224;
  --color-text: #e4e4e7;
  --color-text-muted: #71717a;
  --color-primary: #6A5CFF;
  --color-primary-hover: #7d71ff;
  --color-accent: #4DA3FF;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
}

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--color-text);
}

.btn-nav {
  background: var(--color-surface);
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 500;
}

/* Hero */
.hero {
  text-align: center;
  padding: 60px 0 80px;
}

.hero-banner-card {
  background: #100c19;
  display: inline-block;
  margin-bottom: 32px;
  border: 3px solid rgba(26, 26, 31, 0.6);
  border-radius: 12px;
  padding: 4px;
}

.hero-banner {
  max-width: 600px;
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  line-height: 1.1;
}

.highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto 16px;
}

.clarification {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  opacity: 0.7;
  margin-bottom: 40px;
}

/* Buttons */
.btn-primary {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* Features / Cards */
.features {
  padding: 80px 0;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 60px;
  font-weight: 600;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
}

.feature {
  background: var(--color-surface);
  padding: 32px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.feature p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Trust */
.trust {
  text-align: center;
  padding: 50px 40px;
  background: var(--color-surface);
  border-radius: 20px;
  margin: 40px 0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.trust p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* Waitlist */
.waitlist {
  text-align: center;
  padding: 80px 0 100px;
}

.waitlist h2 {
  font-size: 2rem;
  margin-bottom: 32px;
  font-weight: 600;
}

.form-group {
  display: flex;
  gap: 12px;
  max-width: 440px;
  margin: 0 auto;
}

.form-group input[type="email"] {
  flex: 1;
  padding: 14px 20px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
}

.form-group input[type="email"]::placeholder {
  color: var(--color-text-muted);
}

.form-group input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.hidden {
  display: none;
}

.form-note {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 16px;
}

/* Footer */
footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 640px) {
  header {
    flex-direction: column;
    gap: 20px;
  }

  nav {
    gap: 20px;
  }

  .hero {
    padding: 60px 0;
  }

  .form-group {
    flex-direction: column;
  }

  .form-group input[type="email"],
  .form-group button {
    width: 100%;
  }
}