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

[hidden] {
  display: none !important;
}

:root {
  --color-bg: #0a0a0b;
  --color-surface: #141416;
  --color-border: #27272a;
  --color-text: #fafafa;
  --color-text-muted: #a1a1aa;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, monospace;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  margin-bottom: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

/* Hero */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero {
  text-align: center;
  margin-bottom: 3rem;
}

.badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 9999px;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  background: linear-gradient(to bottom right, var(--color-text) 30%, var(--color-text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto;
}

/* Form */
.waitlist-form {
  max-width: 480px;
  margin: 0 auto 4rem;
  width: 100%;
}

.input-group {
  display: flex;
  gap: 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 0.5rem;
}

.input-group:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input[type="email"] {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--color-text);
  outline: none;
}

input[type="email"]::placeholder {
  color: var(--color-text-muted);
}

button[type="submit"] {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: white;
  background: var(--color-primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease;
  white-space: nowrap;
}

button[type="submit"]:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

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

.btn-loading {
  display: flex;
  align-items: center;
}

.spinner {
  width: 18px;
  height: 18px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border-radius: 8px;
  text-align: center;
}

.message.success {
  color: var(--color-success);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.message.error {
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.feature {
  text-align: center;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.feature h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.feature p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Footer */
footer {
  margin-top: auto;
  padding-top: 3rem;
  text-align: center;
}

footer p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 1.5rem 1rem;
  }

  header {
    margin-bottom: 3rem;
  }

  .input-group {
    flex-direction: column;
    padding: 0.75rem;
  }

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

  .features {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .feature {
    display: flex;
    align-items: center;
    text-align: left;
    gap: 1rem;
  }

  .feature-icon {
    margin: 0;
    flex-shrink: 0;
  }

  .feature h3 {
    margin-bottom: 0.125rem;
  }
}