:root {
  --color-primary: #1a365d;
  --color-accent: #0d9488;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-bg: #ffffff;
  --color-error: #dc2626;
  --color-btn-primary: #1f2937;
  --color-btn-primary-hover: #111827;
  --color-border: #d1d5db;
  --color-text-muted: #9ca3af;
  --font-body: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Text', system-ui, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.wordmark {
  padding: 24px 32px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

.app-icon {
  width: 120px;
  height: 120px;
  margin-bottom: 32px;
  border-radius: 22%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.subtitle {
  font-size: 19px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  max-width: 480px;
}

.form {
  width: 100%;
  max-width: 480px;
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  gap: 8px;
}

.form-row.hidden {
  display: none;
}

.form input[type="email"] {
  flex: 1;
  font-size: 16px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s;
}

.form input[type="email"]:focus {
  border-color: var(--color-primary);
}

.form button {
  font-size: 16px;
  font-weight: 500;
  padding: 12px 32px;
  background: var(--color-btn-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.form button:hover {
  background: var(--color-btn-primary-hover);
}

.form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-message {
  margin-top: 12px;
  font-size: 15px;
  min-height: 24px;
}

.form-message.success {
  color: var(--color-accent);
}

.form-message.error {
  color: var(--color-error);
}

.hint {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer {
  padding: 24px 32px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

@media (max-width: 480px) {
  .form-row {
    flex-direction: column;
  }

  .form button {
    width: 100%;
  }

  .hero {
    padding: 0 20px;
  }
}

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