/* ==========================================================================
   De Novo NoMo — Component Styles
   ========================================================================== */

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-info);
  outline-offset: 2px;
}

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

.btn svg,
.btn i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Primary */
.btn-primary {
  background: var(--color-primary-700);
  color: #fff;
  border-color: var(--color-primary-700);
}

.btn-primary:hover {
  background: var(--color-primary-900);
  border-color: var(--color-primary-900);
}

.btn-primary:active {
  background: #0b1f36;
}

/* Secondary */
.btn-secondary {
  background: var(--color-bg-subtle);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-200);
}

.btn-secondary:active {
  background: var(--color-primary-100);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-bg-subtle);
}

.btn-ghost:active {
  background: var(--color-primary-100);
}

/* Danger */
.btn-danger {
  background: var(--color-error);
  color: #fff;
  border-color: var(--color-error);
}

.btn-danger:hover {
  background: #c41e2a;
  border-color: #c41e2a;
}

.btn-danger:active {
  background: #a91b24;
}

/* Sizes */
.btn-sm {
  padding: 4px 10px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

/* Icon-only button */
.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  padding: 4px;
  width: 28px;
  height: 28px;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3,
.card-header h4 {
  margin: 0;
}

.card-body {
  flex: 1;
}

.card-footer {
  padding-top: var(--space-4);
  margin-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ==========================================================================
   Forms
   ========================================================================== */

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

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.form-label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-default);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-primary-300);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-info);
  box-shadow: 0 0 0 3px rgba(38, 128, 194, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid {
  border-color: var(--color-error);
}

.form-input.is-invalid:focus,
.form-select.is-invalid:focus,
.form-textarea.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(225, 45, 57, 0.15);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23829ab1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: 0.875rem;
}

.form-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-sm);
  accent-color: var(--color-primary-700);
  cursor: pointer;
}

.form-error {
  font-size: 0.75rem;
  color: var(--color-error);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ==========================================================================
   Modals
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 42, 67, 0.45);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-modal);
  box-shadow: var(--shadow-lg);
  max-width: 560px;
  width: 90%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: translateY(8px) scale(0.98);
  transition: transform 0.2s ease;
}

.modal-overlay.is-active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-default);
  color: var(--color-text-muted);
  transition: background 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.table th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-bg-subtle);
  white-space: nowrap;
}

.table tbody tr:hover {
  background: var(--color-primary-50);
}

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

.table tbody tr:nth-child(even):hover {
  background: var(--color-primary-50);
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ==========================================================================
   Badges
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: 999px;
  white-space: nowrap;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-success {
  background: #e6f7f0;
  color: #1a7a5c;
}

.badge-warning {
  background: #fdf3d7;
  color: #946200;
}

.badge-error {
  background: #fde2e4;
  color: #b91c28;
}

.badge-info {
  background: #dbeafe;
  color: #1a5fa0;
}

/* ==========================================================================
   Tabs
   ========================================================================== */

.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  gap: 0;
  overflow-x: auto;
}

.tab-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease;
  margin-bottom: -1px;
}

.tab-item:hover {
  color: var(--color-text);
}

.tab-item.is-active {
  color: var(--color-accent-500);
  border-bottom-color: var(--color-accent-500);
}

.tab-item svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Dropdown
   ========================================================================== */

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 180px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1) 0;
  z-index: 500;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
}

.dropdown-menu.is-right {
  left: auto;
  right: 0;
}

.dropdown.is-open .dropdown-menu,
.dropdown-menu.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 14px;
  font-size: 0.875rem;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.1s ease;
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--color-bg-subtle);
}

.dropdown-item.is-danger {
  color: var(--color-error);
}

.dropdown-item.is-danger:hover {
  background: #fde2e4;
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-1) 0;
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ==========================================================================
   Toast
   ========================================================================== */

.toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 420px;
  pointer-events: auto;
  animation: toastSlideIn 0.3s ease;
}

.toast.is-leaving {
  animation: toastSlideOut 0.25s ease forwards;
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-error   { border-left: 3px solid var(--color-error); }
.toast-info    { border-left: 3px solid var(--color-info); }

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}

.toast-success .toast-icon { color: var(--color-success); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-error   .toast-icon { color: var(--color-error); }
.toast-info    .toast-icon { color: var(--color-info); }

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 2px;
}

.toast-message {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.toast-dismiss {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 0.15s ease;
}

.toast-dismiss:hover {
  color: var(--color-text);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(24px);
  }
}

/* ==========================================================================
   Tooltip
   ========================================================================== */

.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
  color: #fff;
  background: var(--color-primary-900);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  z-index: 600;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0.15s ease;
  pointer-events: none;
}

.tooltip::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-primary-900);
  z-index: 600;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0.15s ease;
  pointer-events: none;
}

.tooltip:hover::after,
.tooltip:hover::before {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Avatar
   ========================================================================== */

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-200);
  color: var(--color-primary-900);
  font-size: 0.8125rem;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
  user-select: none;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-sm {
  width: 24px;
  height: 24px;
  font-size: 0.6875rem;
}

.avatar-lg {
  width: 48px;
  height: 48px;
  font-size: 1.1rem;
}

.avatar-group {
  display: flex;
}

.avatar-group .avatar {
  border: 2px solid var(--color-bg);
  margin-left: -8px;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

/* ==========================================================================
   Loading — Spinner
   ========================================================================== */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-primary-100);
  border-top-color: var(--color-primary-700);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 1.5px;
}

.spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Loading — Skeleton
   ========================================================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-primary-50) 0%,
    var(--color-primary-100) 50%,
    var(--color-primary-50) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease infinite;
  border-radius: var(--radius-default);
  height: 16px;
}

.skeleton-text {
  height: 12px;
  margin-bottom: var(--space-2);
  width: 100%;
}

.skeleton-heading {
  height: 22px;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.skeleton-card {
  height: 140px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--color-primary-100);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary-700);
  border-radius: 999px;
  transition: width 0.4s ease;
}

.progress-fill-success { background: var(--color-success); }
.progress-fill-warning { background: var(--color-warning); }
.progress-fill-error   { background: var(--color-error); }
.progress-fill-accent  { background: var(--color-accent-500); }

.progress-bar-lg {
  height: 10px;
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-5);
  text-align: center;
  color: var(--color-text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.empty-state p {
  font-size: 0.875rem;
  max-width: 360px;
}