/* === Design Tokens === */
:root {
  --color-bg: #FAFAF8;
  --color-text: #1A1A2E;
  --color-text-secondary: #4A4A5A;
  --color-text-muted: #8A8A96;
  --color-accent: #3D5A80;
  --color-accent-hover: #2C4466;
  --color-border: #E0E0DA;
  --color-surface: #F0F0EC;
  --color-input-bg: #FFFFFF;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --radius: 8px;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === Layout === */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Hero === */
.hero {
  padding: 120px 0 0;
  text-align: center;
}

.wordmark {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -1.5px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.tagline {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  font-style: italic;
  color: var(--color-accent);
  line-height: 1.5;
}

/* === Signup === */
.signup {
  padding: 64px 0;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.signup-prompt {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.email-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}

.email-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font-sans);
  background: var(--color-input-bg);
  color: var(--color-text);
  outline: none;
}

.email-form input[type="email"]:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(61, 90, 128, 0.12);
}

.email-form button {
  padding: 12px 24px;
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background 0.2s;
}

.email-form button:hover {
  background: var(--color-accent-hover);
}

.signup-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* === Footer === */
footer {
  padding: 32px 0;
  text-align: center;
}

.founder-line {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.founder-line a {
  color: var(--color-accent);
  text-decoration: none;
}

.founder-line a:hover {
  text-decoration: underline;
}

.contact {
  font-size: 14px;
  color: var(--color-text-muted);
}

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

/* === Responsive === */
@media (max-width: 480px) {
  .hero {
    padding-top: 80px;
  }

  .wordmark {
    font-size: 42px;
  }

  .tagline {
    font-size: 18px;
  }

  .container {
    padding: 0 20px;
  }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
  }
}