/* ==========================================================================
   Components — reusable UI patterns shared across every page.
   ========================================================================== */

/* ---- Brand / logo ---- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  color: var(--color-text-primary);
  text-decoration: none;
}

.brand:hover {
  color: var(--color-text-primary);
}

.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  flex-shrink: 0;
}

/* ---- Primary navigation ---- */
.nav-primary {
  display: none;
}

.nav-primary ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-lg);
}

.nav-primary a {
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--fw-medium);
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
}

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

.nav-primary a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-actions {
  display: none;
  align-items: center;
  gap: var(--space-sm);
}

@media (min-width: 900px) {
  .nav-primary,
  .nav-actions {
    display: flex;
  }
}

/* ---- Mobile nav toggle ---- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}

.nav-mobile {
  display: none;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.nav-mobile.is-open {
  display: block;
}

.nav-mobile ul {
  list-style: none;
  margin: 0;
  padding: var(--space-sm) 0;
}

.nav-mobile a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--fw-medium);
  border-radius: var(--radius-sm);
}

.nav-mobile a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav-mobile a:hover {
  background: var(--color-surface-muted);
}

@media (min-width: 900px) {
  .nav-mobile {
    display: none !important;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
  transition: background var(--motion-fast) var(--motion-ease),
    border-color var(--motion-fast) var(--motion-ease),
    color var(--motion-fast) var(--motion-ease);
  min-height: 44px;
}

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

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

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

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

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

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
  text-decoration: underline;
  padding-inline: var(--space-xs);
}

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

.btn-danger {
  background: var(--color-surface);
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
}

.btn-block {
  width: 100%;
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-subtle);
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
  height: 100%;
  transition: border-color var(--motion-normal) var(--motion-ease),
    box-shadow var(--motion-normal) var(--motion-ease),
    transform var(--motion-normal) var(--motion-ease);
}

.tool-card:hover,
.tool-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}

.tool-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-card__icon svg {
  width: 22px;
  height: 22px;
}

.tool-card h3 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-2xs);
}

.tool-card p {
  font-size: var(--fs-sm);
  margin-bottom: 0;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.feature-card h3 {
  font-size: var(--fs-md);
}

.feature-card p {
  font-size: var(--fs-sm);
  margin-bottom: 0;
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary-active);
}

.badge--accent {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.badge--neutral {
  background: var(--color-surface-muted);
  color: var(--color-text-secondary);
}

/* ---- Alert ---- */
.alert {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-muted);
  font-size: var(--fs-sm);
}

.alert svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.alert--success {
  background: var(--color-success-soft);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert--warning {
  background: var(--color-warning-soft);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert--danger {
  background: var(--color-danger-soft);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.alert--info {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-active);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-2xs);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--color-border-strong);
  margin-left: var(--space-2xs);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: var(--fw-medium);
}

/* ---- FAQ ---- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-2xs);
  cursor: pointer;
  font-weight: var(--fw-semibold);
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: var(--fs-lg);
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--motion-normal) var(--motion-ease);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 var(--space-2xs) var(--space-md);
  font-size: var(--fs-sm);
}

/* ---- Ad placeholder ---- */
.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-muted);
  color: var(--color-text-secondary);
  font-size: var(--fs-xs);
  text-align: center;
  padding: var(--space-sm);
}

/* ---- Empty tool workspace shell (structure only, no logic) ---- */
.workspace-shell {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-subtle);
}

.upload-zone {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface-muted);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  cursor: pointer;
}

.upload-zone:hover,
.upload-zone:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.upload-zone.is-dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.upload-zone__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-sm);
  color: var(--color-primary);
}

.upload-zone__hint {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-2xs);
}

.privacy-note {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

.privacy-note svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.control-group {
  margin-bottom: var(--space-md);
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-group__label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ---- Steps (How it works) ---- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-lg);
  counter-reset: step;
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.steps li {
  position: relative;
  padding-left: var(--space-2xl);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
}

.steps h3 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-2xs);
}

.steps p {
  font-size: var(--fs-sm);
  margin-bottom: 0;
}