/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-base);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  text-align: center;
}

.btn-primary {
  background: var(--color-green-600);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-green-700);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--color-white);
}

.btn-secondary {
  background: transparent;
  color: var(--color-blue-600);
  border-color: var(--color-blue-600);
}

.btn-secondary:hover {
  background: var(--color-blue-600);
  color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-blue-600);
  padding: 0.5rem 0.25rem;
}

.btn-ghost:hover {
  text-decoration: underline;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: var(--text-sm);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Cards */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card-hover:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-promo {
  background: var(--color-green-100);
  color: var(--color-green-700);
  text-transform: uppercase;
}

.badge-founding {
  background: var(--color-bg);
  border: 1px solid var(--color-warning);
  color: var(--color-muted);
  font-weight: 600;
  text-transform: none;
}

/* Forms */
.field {
  margin-bottom: var(--space-3);
}

.field label {
  display: block;
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: 0.35rem;
  color: var(--color-ink);
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-ink);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--color-blue-600);
}

.field-error {
  color: var(--color-error);
  font-size: var(--text-xs);
  margin-top: 0.3rem;
  display: none;
}

.field.has-error input,
.field.has-error textarea {
  border-color: var(--color-error);
}

.field.has-error .field-error {
  display: block;
}

.form-status {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  display: none;
}

.form-status.is-success {
  display: block;
  background: var(--color-green-100);
  color: var(--color-green-700);
}

.form-status.is-error {
  display: block;
  background: #FBEAE8;
  color: var(--color-error);
}

.honeypot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 250, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.nav-links a {
  color: var(--color-ink);
  font-weight: 500;
  font-size: var(--text-sm);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle svg {
  width: 26px;
  height: 26px;
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

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

  .nav-toggle {
    display: inline-flex;
  }
}

/* Generic modal shell (used by auth modal) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 36, 28, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-panel {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 420px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-5);
  transform: scale(0.96);
  transition: transform var(--transition-base);
}

.modal-overlay.is-open .modal-panel {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--text-xl);
  color: var(--color-muted);
  line-height: 1;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}