/* ==============================================================================
   LAUNCHFLOW UI COMPONENTS
   Modern, accessible UI primitives: Nav, Hero, Cards, Forms, Modals, Toasts
   ============================================================================== */

/* -----------------------------------------------------------------------------
   1. NAVIGATION BAR & HEADER
   ----------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 0.4rem 0.2rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface);
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

@media (max-width: 860px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg-surface-elevated);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.25rem;
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

/* -----------------------------------------------------------------------------
   2. BUTTONS
   ----------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: rgba(37, 99, 235, 0.08);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.85rem 1.85rem;
  font-size: 1.1rem;
}

/* -----------------------------------------------------------------------------
   3. HERO SECTION
   ----------------------------------------------------------------------------- */
.hero {
  padding: 6rem 0 4rem 0;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  background-color: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-full);
  margin-bottom: 1.75rem;
}

.hero-title {
  max-width: 900px;
  margin: 0 auto 1.5rem auto;
}

.hero-subtitle {
  max-width: 680px;
  margin: 0 auto 2.5rem auto;
  font-size: 1.25rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-preview {
  margin: 0 auto;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface-elevated);
  box-shadow: var(--card-shadow-hover);
  padding: 1.5rem;
  overflow: hidden;
}

/* -----------------------------------------------------------------------------
   4. CARDS & FEATURE GRID
   ----------------------------------------------------------------------------- */
.card {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(37, 99, 235, 0.3);
}

.card-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  border-radius: var(--radius-md);
  background-color: rgba(37, 99, 235, 0.08);
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.65rem;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 0;
}

/* -----------------------------------------------------------------------------
   5. PRICING CARDS
   ----------------------------------------------------------------------------- */
.pricing-card {
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
}

.pricing-card.highlighted {
  border: 2px solid var(--color-primary);
  box-shadow: 0 10px 30px -10px rgba(37, 99, 235, 0.3);
  transform: scale(1.02);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
}

.pricing-price {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 1rem 0 0.5rem 0;
  line-height: 1;
}

.pricing-period {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: normal;
}

.pricing-features {
  list-style: none;
  margin: 2rem 0;
  flex: 1 0 auto;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.pricing-features li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: bold;
}

/* -----------------------------------------------------------------------------
   6. FORMS & INPUT VALIDATION
   ----------------------------------------------------------------------------- */
.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background-color: var(--bg-surface-elevated);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  font-size: 0.825rem;
  color: var(--color-danger);
  margin-top: 0.4rem;
  display: none;
}

.form-error.is-visible {
  display: block;
}

/* Honeypot field (hidden from legitimate humans) */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* -----------------------------------------------------------------------------
   7. TOAST NOTIFICATIONS
   ----------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 300px;
  max-width: 420px;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow-hover);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  transform: translateY(20px);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.toast-success { border-left: 4px solid var(--color-accent); }
.toast-error { border-left: 4px solid var(--color-danger); }
.toast-info { border-left: 4px solid var(--color-primary); }

/* -----------------------------------------------------------------------------
   8. FOOTER
   ----------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.925rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}