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

:root {
  --color-bg: #111318;
  --color-surface: #1a1d24;
  --color-text: #f0f1f3;
  --color-text-muted: #9298a5;
  --color-teal-400: #2bb89a;
  --color-teal-500: #00997a;
  --color-teal-600: #007d63;
  --color-coral-500: #d4634a;
  --color-border: rgba(255, 255, 255, 0.08);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.15);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.15);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Geist Sans", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

a {
  color: var(--color-teal-400);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
.page {
  width: 100%;
  max-width: 640px;
  padding: 3rem 2rem;
  margin: 0 auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Brand */
.wordmark {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.wordmark span {
  color: var(--color-teal-500);
}

.tagline {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 1.5rem;
}

/* Features */
.features {
  list-style: none;
  margin-bottom: 2.5rem;
}

.features li {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  padding: 0.3rem 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.features li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-teal-500);
  flex-shrink: 0;
}

/* Signup form */
.signup {
  margin-bottom: 3rem;
}

.signup-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  display: block;
}

.signup-form {
  display: flex;
  gap: 0.5rem;
}

.signup-input {
  flex: 1;
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s;
}

.signup-input::placeholder {
  color: var(--color-text-muted);
}

.signup-input:focus {
  border-color: var(--color-teal-500);
}

.signup-btn {
  padding: 0.7rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  background: var(--color-teal-500);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: background-color 0.15s;
  white-space: nowrap;
}

.signup-btn:hover {
  background: var(--color-teal-600);
}

.signup-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.signup-message {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  min-height: 1.25rem;
}

.signup-message.success {
  color: var(--color-teal-400);
}

.signup-message.error {
  color: var(--color-coral-500);
}

/* Footer */
.footer {
  width: 100%;
  max-width: 640px;
  padding: 1.5rem 2rem;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer a {
  color: var(--color-text-muted);
}

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

.footer-links {
  display: flex;
  gap: 1rem;
  margin-top: 0.25rem;
  flex-wrap: wrap;
}

/* Privacy page */
.privacy-content {
  justify-content: flex-start;
  padding-top: 2.5rem;
}

.privacy-content h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.privacy-content .last-updated {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.privacy-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.privacy-content p {
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.privacy-content ul {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
}

.privacy-content li {
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

/* Fade in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page {
  animation: fadeIn 0.6s ease-out;
}

/* Responsive */
@media (max-width: 600px) {
  .page {
    padding: 2rem 1.25rem;
  }

  .wordmark {
    font-size: 1.65rem;
  }

  .tagline {
    font-size: 1.15rem;
  }

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

  .footer {
    padding: 1.25rem;
  }
}