/* ==========================================================================
   Rahavard Danesh — Component library
   Buttons, cards, badges, alerts, forms, tables, tabs, progress,
   toast, modal, tooltip, empty states, avatars.
   ========================================================================== */

/* ------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  line-height: 1;
  border: 1px solid transparent;
  transition: background-color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
  white-space: nowrap;
}

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

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-invert);
}
.btn--primary:hover { background-color: var(--color-primary-hover); }
.btn--primary:active { background-color: var(--color-primary-active); }

.btn--secondary {
  background-color: var(--color-primary-tint);
  color: var(--color-primary-dark);
}
.btn--secondary:hover { background-color: #E2F2DA; }

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-soft);
}
.btn--ghost:hover {
  background-color: var(--color-surface-3);
  color: var(--color-text);
}

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

.btn--danger {
  background-color: var(--color-danger);
  color: #fff;
}
.btn--danger:hover { background-color: #B01B1B; }

.btn--sm { padding: 8px 16px; font-size: var(--fs-body-sm); }
.btn--lg { padding: 16px 32px; font-size: var(--fs-body-lg); }

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

.btn--icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
}
.btn--icon:hover {
  background-color: var(--color-surface-3);
  color: var(--color-text);
}

/* ------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: box-shadow var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease);
}

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

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
}

.card__link {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-primary-dark);
}
.card__link:hover { text-decoration: underline; }

/* Stat card */
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.stat-card__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-tint);
  color: var(--color-primary-dark);
}

.stat-card__value {
  font-size: 1.75rem;
  font-weight: var(--fw-extrabold);
  line-height: 1.2;
  color: var(--color-text);
}

.stat-card__label {
  font-size: var(--fs-body-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.stat-card__trend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  margin-top: var(--space-2);
}
.stat-card__trend--up { color: var(--color-success-dark); }
.stat-card__trend--down { color: var(--color-danger); }

/* ------------------------------------------------------------------------
   Badges
   ------------------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  line-height: 1.4;
}

.badge--success { background: var(--color-primary-tint); color: var(--color-success-dark); }
.badge--danger  { background: var(--color-danger-tint); color: var(--color-danger); }
.badge--warning { background: var(--color-warning-tint); color: var(--color-warning); }
.badge--neutral { background: var(--color-surface-3); color: var(--color-text-soft); }
.badge--dark    { background: var(--color-text); color: #fff; }

.badge--dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
}

/* ------------------------------------------------------------------------
   Alerts
   ------------------------------------------------------------------------ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--fs-body-sm);
}

.alert__icon { flex-shrink: 0; margin-top: 2px; }

.alert--success { background: var(--color-primary-tint); border-color: var(--color-primary-soft); color: var(--color-success-dark); }
.alert--danger  { background: var(--color-danger-tint); border-color: #F3C2C2; color: var(--color-danger); }
.alert--warning { background: var(--color-warning-tint); border-color: #F3C2C2; color: var(--color-warning); }
.alert--info    { background: var(--color-surface-2); border-color: var(--color-border); color: var(--color-text-soft); }

/* ------------------------------------------------------------------------
   Forms
   ------------------------------------------------------------------------ */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.field__label {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
}

.field__hint {
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
}

.field__error {
  font-size: var(--fs-caption);
  color: var(--color-danger);
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  color: var(--color-text);
  transition: border-color var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}

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

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px rgba(56, 176, 0, 0.18);
}

.input[aria-invalid="true"],
.input.is-invalid {
  border-color: var(--color-danger);
}

.textarea {
  min-height: 120px;
  resize: vertical;
  line-height: var(--lh-body);
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236E756B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 12px center;
  padding-inline-end: 14px;
  padding-inline-start: 14px;
}

/* Checkbox & radio */
.check,
.radio {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-body-sm);
  cursor: pointer;
}

.check input,
.radio input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  margin: 0;
}

.toggle__track {
  position: absolute;
  inset: 0;
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
  transition: background-color var(--dur-base) var(--ease);
}

.toggle__thumb {
  position: absolute;
  top: 2px;
  inset-inline-start: 2px;
  width: 20px;
  height: 20px;
  background: #fff;
  border-radius: var(--radius-full);
  transition: transform var(--dur-base) var(--ease);
  box-shadow: var(--shadow-sm);
}

.toggle input:checked + .toggle__track { background: var(--color-primary); }
.toggle input:checked + .toggle__track + .toggle__thumb { transform: translateX(-20px); }

.toggle input:focus-visible + .toggle__track {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Search input */
.search {
  position: relative;
}
.search .input {
  padding-inline-start: 40px;
}
.search__icon {
  position: absolute;
  inset-inline-start: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

/* ------------------------------------------------------------------------
   Tables
   ------------------------------------------------------------------------ */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.table {
  width: 100%;
  min-width: 640px;
  font-size: var(--fs-body-sm);
}

.table th {
  text-align: start;
  font-weight: var(--fw-semibold);
  color: var(--color-text-soft);
  background: var(--color-surface-2);
  padding: 14px 16px;
  white-space: nowrap;
}

.table td {
  padding: 14px 16px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-soft);
  vertical-align: middle;
}

.table tbody tr {
  transition: background-color var(--dur-fast) var(--ease);
}
.table tbody tr:hover { background: var(--color-surface-2); }

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

.tabs__btn {
  padding: 12px 18px;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}

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

.tabs__btn.is-active {
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.tab-panel { display: none; }
.tab-panel.is-active { display: block; padding-top: var(--space-5); }

/* ------------------------------------------------------------------------
   Progress
   ------------------------------------------------------------------------ */
.progress {
  width: 100%;
  height: 8px;
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--dur-slow) var(--ease);
}

.progress__bar--bright { background: var(--color-primary-light); }
.progress__bar--danger { background: var(--color-danger); }
.progress__bar--warning { background: var(--color-warning); }

/* ------------------------------------------------------------------------
   Toast
   ------------------------------------------------------------------------ */
.toast-region {
  position: fixed;
  bottom: var(--space-5);
  inset-inline-start: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-toast);
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 280px;
  max-width: 380px;
  padding: var(--space-4);
  background: var(--color-text);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: toast-in var(--dur-base) var(--ease);
}

.toast--success { background: var(--color-success-dark); }
.toast--danger  { background: var(--color-danger); }
.toast--info    { background: var(--color-text); }

.toast__close {
  margin-inline-start: auto;
  color: inherit;
  opacity: 0.7;
}
.toast__close:hover { opacity: 1; }

.toast.is-hiding { animation: toast-out var(--dur-base) var(--ease) forwards; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(12px); }
}

/* ------------------------------------------------------------------------
   Modal
   ------------------------------------------------------------------------ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(31, 31, 31, 0.5);
  display: grid;
  place-items: center;
  padding: var(--space-5);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease),
              visibility var(--dur-base) var(--ease);
}

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

.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transform: translateY(16px) scale(0.98);
  transition: transform var(--dur-base) var(--ease);
}

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

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.modal__title { font-size: var(--fs-h4); font-weight: var(--fw-bold); }

.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* ------------------------------------------------------------------------
   Tooltip
   ------------------------------------------------------------------------ */
.tooltip {
  position: relative;
}
.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  inset-inline-start: 50%;
  transform: translateX(50%) scale(0.9);
  background: var(--color-text);
  color: #fff;
  font-size: var(--fs-caption);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.tooltip:hover::after,
.tooltip:focus-visible::after {
  opacity: 1;
  transform: translateX(50%) scale(1);
}

/* ------------------------------------------------------------------------
   Empty / error states
   ------------------------------------------------------------------------ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  padding: var(--space-8) var(--space-5);
  color: var(--color-text-muted);
}

.empty-state__icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-surface-3);
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------------------
   Avatar
   ------------------------------------------------------------------------ */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-tint);
  color: var(--color-primary-dark);
  display: grid;
  place-items: center;
  font-weight: var(--fw-bold);
  font-size: var(--fs-body-sm);
  flex-shrink: 0;
}

.avatar--sm { width: 32px; height: 32px; font-size: var(--fs-caption); }
.avatar--lg { width: 56px; height: 56px; font-size: var(--fs-h4); }

/* ------------------------------------------------------------------------
   Login role cards
   ------------------------------------------------------------------------ */
.role-card {
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}
.role-card.is-active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

/* ------------------------------------------------------------------------
   Accordion
   ------------------------------------------------------------------------ */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  text-align: start;
}

.accordion__trigger:hover { background: var(--color-surface-2); }

.accordion__trigger svg {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--dur-base) var(--ease);
}

.accordion__trigger[aria-expanded="true"] svg { transform: rotate(180deg); }

.accordion__panel {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-text-soft);
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body);
}

/* ------------------------------------------------------------------------
   Spinner / loading
   ------------------------------------------------------------------------ */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.7s linear infinite;
}

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