:root {
  --color-primary: #0f766e;
  --color-primary-hover: #0d6660;
  --color-primary-light: #ccfbf1;
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-surface: #f9fafb;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-success-light: #dcfce7;
  --color-warning: #d97706;
  --color-warning-light: #fef3c7;
  --color-error: #dc2626;
  --color-error-light: #fee2e2;

  --max-width: 800px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
header {
  border-bottom: 1px solid var(--color-border);
}

.nav-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav-links a:hover {
  color: var(--color-primary);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-decoration: none;
}

/* Main */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Hero */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

.subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Placeholder */
.placeholder {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.card h2, .card h3 {
  margin-bottom: var(--spacing-sm);
}

/* Form elements */
label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  font-size: 0.95rem;
}

label .hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

input[type="number"],
select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
}

input[type="number"]:focus,
select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
  border-color: var(--color-primary);
}

.field {
  margin-bottom: var(--spacing-md);
}

/* Toggle buttons (Yes/No, property type) */
.toggle-group {
  display: flex;
  gap: var(--spacing-sm);
}

.toggle-btn {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.toggle-btn:hover {
  border-color: var(--color-primary);
}

.toggle-btn.active {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

/* Result items */
.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.result-item:last-child {
  border-bottom: none;
}

.result-value {
  font-weight: 700;
  font-size: 1.1rem;
}

.money-big {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
}

.money-savings {
  color: var(--color-success);
  font-weight: 700;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-eligible {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-not-eligible {
  background: var(--color-surface);
  color: var(--color-text-muted);
}

.badge-expiring {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

/* CTA Banner */
.cta-banner {
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  text-align: center;
  margin: var(--spacing-lg) 0;
}

.cta-banner h2 {
  margin-bottom: var(--spacing-sm);
}

.cta-banner ul {
  text-align: left;
  max-width: 400px;
  margin: var(--spacing-md) auto;
  list-style: none;
  padding: 0;
}

.cta-banner li {
  padding: var(--spacing-xs) 0;
  padding-left: 1.5rem;
  position: relative;
}

.cta-banner li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.buy-button {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: background 0.15s;
  border: none;
  cursor: pointer;
}

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

.buy-note {
  margin-top: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: var(--spacing-xl);
}

footer .disclaimer {
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

/* Blur overlay for locked content */
.blur-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
}

/* Sticky CTA bar */
.sticky-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-top: 2px solid var(--color-primary);
  padding: 0.75rem var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 100;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
}

body:has(.sticky-cta-bar) {
  padding-bottom: 4rem;
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.6rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  main {
    padding: 0 var(--spacing-md);
  }

  nav, .nav-bar {
    padding: var(--spacing-md);
  }

  .nav-bar {
    flex-wrap: wrap;
  }

  .nav-links {
    gap: var(--spacing-sm);
    font-size: 0.8rem;
  }

  .sticky-cta-bar {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem var(--spacing-md);
  }

  .money-big {
    font-size: 1.5rem;
  }
}