/* Copy Landing Page - LoveFrom/Jony Ive Inspired */

:root {
  /* Colors */
  --bg: #090C0E;
  --text-primary: #f5f5f5;
  --text-secondary: #888888;
  --accent: #f97316;

  /* Typography */
  --font-serif: 'Marcellus', Georgia, serif;
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-unit: 1rem;
}

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

/* Base */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--space-unit) * 3) calc(var(--space-unit) * 1.5);
}

/* Main Container */
main {
  max-width: 38rem;
  width: 100%;
  animation: fadeIn 1.2s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* The Letter */
.letter {
  margin-bottom: calc(var(--space-unit) * 5);
}

.letter .icon {
  width: 96px;
  height: 96px;
  margin-bottom: calc(var(--space-unit) * 2);
  border-radius: 12px;
  box-shadow: 0 0 0 1px var(--bg);
}

.letter h1 {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 4.5rem);
  font-weight: 400;
  line-height: 1.08;
  margin-bottom: calc(var(--space-unit) * 3);
  letter-spacing: -0.01em;
}

.letter h1 em {
  font-style: italic;
}

.letter p {
  font-family: var(--font-sans);
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  color: rgba(245, 245, 245, 0.72);
  margin-bottom: calc(var(--space-unit) * 2.25);
  letter-spacing: -0.008em;
  font-weight: 400;
  line-height: 1.7;
  max-width: 60ch;
}

.letter p:last-child {
  margin-bottom: 0;
}

.letter em {
  font-style: italic;
  color: var(--text-primary);
}

/* Signup Section */
.signup {
  padding-top: calc(var(--space-unit) * 2);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  animation: fadeIn 1.2s ease-out 0.3s backwards;
}

.signup-intro {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: calc(var(--space-unit) * 1.25);
  letter-spacing: 0.01em;
}

/* Signup Form */
.signup-form {
  display: flex;
  gap: 0.75rem;
}

.signup-form input[type="email"] {
  flex: 1;
  padding: 0.875rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  box-shadow: inset 2px 2px 4px rgba(0,0,0,0.2);
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.signup-form input[type="email"]::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.signup-form input[type="email"]:focus {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.signup-form button {
  background-color: #141414;
  border-radius: 12px;
  padding: 0.875rem 1.5rem;
  border: none;
  color: #f5f5f5;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  box-shadow:
    3px 3px 8px #050505,
    -3px -3px 8px #1a1a1a,
    inset 1px 1px 1px rgba(255,255,255,0.04);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.signup-form button:hover {
  box-shadow:
    4px 4px 10px #050505,
    -4px -4px 10px #1e1e1e,
    inset 1px 1px 1px rgba(255,255,255,0.06);
}

.signup-form button:active {
  box-shadow:
    inset 3px 3px 8px #050505,
    inset -3px -3px 8px #1a1a1a;
  transform: scale(0.98);
}

.signup-form button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

/* Footer */
footer {
  margin-top: calc(var(--space-unit) * 5);
  text-align: center;
  animation: fadeIn 1.2s ease-out 0.5s backwards;
}

.wordmark {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  opacity: 0.6;
}

/* Selection */
::selection {
  background-color: var(--accent);
  color: var(--bg);
}

/* Focus States */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Responsive */
@media (max-width: 480px) {
  body {
    padding: calc(var(--space-unit) * 2) calc(var(--space-unit) * 1.25);
    align-items: flex-start;
    padding-top: calc(var(--space-unit) * 4);
  }

  .letter {
    margin-bottom: calc(var(--space-unit) * 4);
  }

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

  .signup-form button {
    width: 100%;
  }

  footer {
    margin-top: calc(var(--space-unit) * 4);
  }
}

/* Success Message */
.success-message {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.success-sub {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: rgba(245, 245, 245, 0.6);
}