/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 0;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-weight: 600;
  font-size: var(--text-base);
  line-height: 1;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 22px 50px -22px rgba(91, 99, 211, 0.7);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: var(--color-dark);
  color: #fff;
}

.btn--secondary:hover {
  background: var(--color-dark-2);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-line-strong);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.78);
  color: var(--color-text);
  border: 1px solid var(--color-line);
}

.btn--ghost:hover {
  border-color: var(--color-line-strong);
  background: #fff;
}

.btn--on-dark {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.btn--on-dark:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.36);
}

.btn--sm {
  padding: 8px 12px;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: 16px 22px;
  font-size: var(--text-md);
  border-radius: var(--radius-lg);
}

.btn--block {
  width: 100%;
}

/* ============================================================
   Cards & surfaces
   ============================================================ */
.card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-2xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
}

.card--lg {
  padding: var(--space-8);
}

.card--inset {
  background: rgba(5, 6, 15, 0.02);
}

.card--on-dark {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  backdrop-filter: blur(12px);
}

/* ============================================================
   Inputs
   ============================================================ */
.field {
  display: grid;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.field--row {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--space-3);
}

.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-text);
  padding: 11px 13px;
  font-weight: 500;
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-soft);
  font-weight: 400;
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.textarea {
  resize: vertical;
  min-height: 96px;
  line-height: var(--leading-normal);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
  color: var(--color-text);
}

.checkbox-row input {
  width: auto;
}

.field-error {
  margin: 4px 0 0;
  color: var(--color-danger);
  font-size: var(--text-sm);
  font-weight: 500;
  min-height: 1em;
}

/* ============================================================
   Eyebrow / labels / pills
   ============================================================ */
.eyebrow {
  margin: 0;
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
}

.eyebrow--on-dark {
  color: var(--color-primary);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-line-strong);
  background: #fff;
  color: var(--color-text);
  padding: 5px 10px;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: none;
}

.pill--primary {
  border-color: rgba(124, 135, 247, 0.35);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.pill--success {
  border-color: var(--color-success-line);
  background: var(--color-success-bg);
  color: var(--color-success);
}

.pill--warning {
  border-color: var(--color-warning-line);
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.pill--danger {
  border-color: var(--color-danger-line);
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.pill--on-dark {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
}

.badge-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: var(--text-sm);
  font-weight: 700;
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

.container--wide {
  max-width: var(--container-wide);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.stack-2 > * + * { margin-top: var(--space-2); }
.stack-3 > * + * { margin-top: var(--space-3); }
.stack-4 > * + * { margin-top: var(--space-4); }
.stack-6 > * + * { margin-top: var(--space-6); }
.stack-8 > * + * { margin-top: var(--space-8); }

.divider {
  border-top: 1px solid var(--color-line);
  margin: var(--space-6) 0;
}

.muted {
  color: var(--color-text-muted);
}

.text-soft {
  color: var(--color-text-soft);
}

.empty-state {
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  color: var(--color-text-muted);
  text-align: center;
  font-size: var(--text-sm);
  background: rgba(5, 6, 15, 0.02);
}

/* ============================================================
   Brand lockup
   ============================================================ */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand-lockup img {
  width: 36px;
  height: 36px;
}

.brand-lockup .wordmark {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 400;
  letter-spacing: var(--tracking-display);
  line-height: 1;
  color: var(--color-primary-dark);
}

.brand-lockup--on-dark .wordmark {
  color: #fff;
}

.brand-lockup--on-dark img {
  filter: brightness(0) invert(1);
}

/* ============================================================
   Header / Footer
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 72px;
}

.site-footer {
  margin-top: var(--space-20);
  background: var(--color-dark-3);
  color: rgba(255, 255, 255, 0.72);
  padding: var(--space-12) 0;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__inner {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.site-footer__cols {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  font-size: var(--text-sm);
}

.site-footer__rule {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.55);
  font-size: var(--text-xs);
}

/* ============================================================
   Toast (errors only — confirmation uses inline card)
   ============================================================ */
.toast {
  position: fixed;
  right: var(--space-6);
  bottom: var(--space-6);
  z-index: 60;
  max-width: 360px;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  background: var(--color-dark);
  color: #fff;
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  animation: toastSlide var(--dur-base) var(--ease-out);
}

.toast--error {
  background: linear-gradient(180deg, #1a0d18 0%, #2a0e16 100%);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.toast[hidden] {
  display: none;
}

@keyframes toastSlide {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   Animations
   ============================================================ */
.fade-in-up {
  animation: fadeInUp 0.5s var(--ease-out) both;
}

.fade-in-up--delay-1 { animation-delay: 80ms; }
.fade-in-up--delay-2 { animation-delay: 160ms; }
.fade-in-up--delay-3 { animation-delay: 240ms; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    rgba(5, 6, 15, 0.04) 0%,
    rgba(5, 6, 15, 0.08) 40%,
    rgba(5, 6, 15, 0.04) 80%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.4s linear infinite;
  border-radius: var(--radius-md);
}

@keyframes skeletonShimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* ============================================================
   Small utilities
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.row--end {
  justify-content: flex-end;
}

.row--between {
  justify-content: space-between;
}