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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  color: #000;
  background: #fff;
  font-size: 18px;
}

.container {
  max-width: 520px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  padding: 80px 0 120px;
  text-align: center;
}

.logo {
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 80px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.logo-icon {
  height: 42px;
  width: auto;
}

.hero {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 24px;
  font-weight: 400;
  color: #666;
  margin-bottom: 0;
}

.section {
  margin-bottom: 120px;
}

.section h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.section p {
  margin-bottom: 24px;
  line-height: 1.6;
}

.example {
  margin: 64px 0;
  max-width: 280px;
  margin-left: auto;
  margin-right: auto;
}

.message-thread {
  background: #f8f9fa;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
}

.message {
  margin: 12px 0;
  display: flex;
}

.message.sent {
  justify-content: flex-end;
}

.message.received {
  justify-content: flex-start;
}

.bubble {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.3;
}

.bubble.sent {
  background: #007aff;
  color: white;
}

.bubble.received {
  background: #e5e5ea;
  color: black;
}

.time-gap {
  text-align: center;
  color: #999;
  font-size: 13px;
  margin: 20px 0;
  font-style: italic;
}

.philosophy {
  font-size: 22px;
  line-height: 1.5;
  text-align: center;
  margin: 80px 0;
  font-style: italic;
  color: #333;
}

.waitlist-section {
  text-align: center;
  margin: 120px 0 80px;
}

.waitlist-section h3 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.waitlist-section p {
  color: #666;
  margin-bottom: 40px;
}

.email-form {
  max-width: 320px;
  margin: 0 auto;
  position: relative;
}

.email-input {
  width: 100%;
  padding: 16px 0;
  border: none;
  border-bottom: 2px solid #eee;
  font-size: 18px;
  background: transparent;
  transition: border-color 0.2s ease;
}

.email-input:focus {
  outline: none;
  border-bottom-color: #000;
}

.email-input::placeholder {
  color: #999;
}

.submit-btn {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: #666;
  transition: color 0.2s ease;
  padding: 4px;
}

.submit-btn:hover {
  color: #000;
}

.submit-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.error-message {
  color: #ff3b30;
  font-size: 14px;
  margin-top: 8px;
  text-align: left;
}

.footer {
  text-align: center;
  padding: 80px 0 40px;
  color: #ccc;
  font-size: 14px;
}

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

/* Success Toast Styles */
.success-toast {
  position: fixed;
  top: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #fff;
  border: 2px solid #000;
  border-radius: 8px;
  padding: 20px 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  max-width: 320px;
  width: calc(100vw - 48px);
}

.success-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.success-toast.hide {
  opacity: 0;
  transform: translateX(-50%) translateY(-20px);
}

.toast-content {
  text-align: center;
}

.toast-content > div:first-child {
  font-size: 18px;
  font-weight: 600;
  color: #000;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.toast-subtitle {
  font-size: 14px;
  color: #666;
  line-height: 1.4;
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }

  .container {
    padding: 0 20px;
  }

  .header {
    padding: 60px 0 80px;
  }

  .logo {
    margin-bottom: 60px;
  }

  .hero {
    font-size: 36px;
    margin-bottom: 24px;
  }

  .subtitle {
    font-size: 20px;
  }

  .section {
    margin-bottom: 80px;
  }

  .section h2 {
    font-size: 24px;
  }

  .philosophy {
    font-size: 20px;
    margin: 60px 0;
  }

  .waitlist-section {
    margin: 80px 0 60px;
  }

  .waitlist-section h3 {
    font-size: 24px;
  }

  .success-toast {
    top: 20px;
    max-width: calc(100vw - 40px);
  }

  .toast-content > div:first-child {
    font-size: 16px;
  }

  .toast-subtitle {
    font-size: 13px;
  }
}