:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --border: #e5e7eb;
  --card-bg: #ffffff;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --text-primary: #f8f9fa;
    --text-secondary: #a1a1b5;
    --accent: #818cf8;
    --accent-hover: #6366f1;
    --border: #2d2d44;
    --card-bg: #1a1a2e;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

.hero {
  text-align: center;
  padding: 6rem 0;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero .subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.problem {
  background-color: var(--bg-secondary);
  margin: 0 -2rem;
  padding: 5rem 2rem;
}

.problem h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.problem-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
}

.problem-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.problem-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.problem-card p {
  color: var(--text-secondary);
}

.solution-teaser {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.solution-teaser h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.solution-teaser p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.coming-soon {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 1.5rem;
}

.waitlist {
  text-align: center;
  background-color: var(--bg-secondary);
  margin: 0 -2rem;
  padding: 5rem 2rem;
}

.waitlist h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.waitlist > p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

#waitlist-form {
  max-width: 450px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

#email {
  flex: 1;
  min-width: 250px;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

#email:focus {
  border-color: var(--accent);
}

#email::placeholder {
  color: var(--text-secondary);
}

button[type="submit"] {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  background-color: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

button[type="submit"]:hover {
  background-color: var(--accent-hover);
}

button[type="submit"]:active {
  transform: scale(0.98);
}

button[type="submit"]:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-message {
  margin-top: 1rem;
  font-size: 0.95rem;
  min-height: 1.5rem;
}

.form-message.success {
  color: #10b981;
}

.form-message.error {
  color: #ef4444;
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
  header {
    padding: 1rem;
  }

  main {
    padding: 0 1rem;
  }

  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 4rem 0;
  }

  .problem {
    margin: 0 -1rem;
    padding: 3rem 1rem;
  }

  .waitlist {
    margin: 0 -1rem;
    padding: 3rem 1rem;
  }

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

  #email {
    min-width: 100%;
  }

  button[type="submit"] {
    width: 100%;
  }
}