/* Reusable component styles shared across templates. Layered on top of
   tokens.css and base.css. Keep this the single home for buttons, inputs,
   cards, badges, and alerts — other tickets should reuse these classes
   rather than inventing one-off styles. */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  text-decoration: none;
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-alt);
  color: var(--color-text);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-alt);
  color: var(--color-text);
  text-decoration: none;
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn-danger:hover:not(:disabled) {
  background: #a3291c;
  color: var(--color-text-inverse);
  text-decoration: none;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-4);
}

.label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.input,
.textarea,
.select {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.textarea {
  resize: vertical;
  min-height: 6rem;
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

.help-text {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.error-text {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-danger);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

.card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.4;
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary-hover);
}

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

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

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

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

/* Alerts */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.alert-info {
  background: var(--color-info-light);
  border-color: var(--color-primary-light);
  color: var(--color-primary-hover);
}

.alert-success {
  background: var(--color-success-light);
  border-color: #c3e6cf;
  color: var(--color-success);
}

.alert-danger {
  background: var(--color-danger-light);
  border-color: #f1c6bf;
  color: var(--color-danger);
}

.alert-warning {
  background: var(--color-warning-light);
  border-color: #f0dba9;
  color: var(--color-warning);
}

/* Table structure with row hover and zebra striping, shared by every
   data table in the app (dashboards, review lists, admin tables). */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.table th {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  font-weight: 600;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:nth-child(even) {
  background: var(--color-surface-alt);
}

.table tbody tr:hover {
  background: var(--color-primary-light);
}

/* A .card that exists only to give a table a bordered/shadowed frame. */
.table-card {
  padding: 0;
  overflow-x: auto;
}

.table-card .table {
  margin: 0;
}

/* Icon-only action buttons for inline table row actions. */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
}

.icon-btn svg {
  width: 1rem;
  height: 1rem;
}

.icon-btn:hover {
  background: var(--color-surface-alt);
}

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

.icon-btn-primary:hover {
  background: var(--color-primary-light);
}

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

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

/* "Nothing here yet" empty states. Pair with a motif icon
   (app/static/css/motifs.css) for pages that want the mechanical/
   science illustration treatment (KAN-56); the icon is optional. */
.empty-state {
  max-width: 26rem;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

.empty-state .motif-icon {
  margin: 0 auto var(--space-3);
}

.empty-state-title {
  font-weight: 600;
  margin: 0 0 var(--space-1);
}

.empty-state-text {
  color: var(--color-text-muted);
  margin: 0;
}