/**
 * Aura Link — Global Base Styles
 * Reset, typography utilities, and shared component primitives.
 * Consumed by all three surfaces.
 */

/* ============================================================
   BOX MODEL RESET
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans-product);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-ink);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-brand);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

ul, ol { list-style: none; }

/* ============================================================
   SKIP LINK (Accessibility)
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-brand);
  color: white;
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: 0 0 var(--radius) 0;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

/* ============================================================
   SCREEN READER ONLY
   ============================================================ */
.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;
}

/* ============================================================
   FOCUS VISIBLE
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */
.h-page-title {
  font-family: var(--font-sans-product);
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  line-height: var(--leading-tight);
}
.h-section {
  font-family: var(--font-sans-product);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-ink);
}
.h-card {
  font-family: var(--font-sans-product);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}
.body-text { font-size: var(--text-base); line-height: var(--leading-normal); }
.metadata  { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.02em; }

/* Marketing / portal brand fonts */
.brand-display {
  font-family: var(--font-sans-brand);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.mono { font-family: var(--font-mono); }
.mute { color: var(--color-ink-2); }

/* ============================================================
   BUTTON COMPONENT
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--color-brand); outline-offset: 2px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn--primary   { background: var(--color-brand); color: white; }
.btn--primary:hover:not(:disabled) { background: var(--color-brand-hover); }

.btn--secondary { background: var(--color-bg-elev); color: var(--color-ink-1); border-color: var(--color-border); }
.btn--secondary:hover:not(:disabled) { background: var(--color-bg-hover); }

.btn--ghost     { background: transparent; color: var(--color-ink-1); }
.btn--ghost:hover:not(:disabled) { background: var(--color-bg-hover); }

.btn--danger    { background: var(--color-danger); color: white; }
.btn--danger:hover:not(:disabled) { background: #B91C1C; }

.btn--sm { padding: var(--space-1) var(--space-3); font-size: var(--text-sm); }
.btn--lg { padding: var(--space-3) var(--space-6); font-size: var(--text-md); }
.btn--block { width: 100%; justify-content: center; }

/* ============================================================
   CARD COMPONENT
   ============================================================ */
.card {
  background: var(--color-bg-elev);
  border: var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--border);
  gap: var(--space-3);
}
.card__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
  margin: 0;
}
.card__action { font-size: var(--text-sm); color: var(--color-brand); }
.card__body   { padding: var(--space-5); }

.card--compact .card__header { padding: var(--space-3) var(--space-4); }
.card--compact .card__body   { padding: var(--space-4); }

/* ============================================================
   FORM COMPONENTS
   ============================================================ */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.field__label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-1);
}
.field__label .required {
  color: var(--color-danger);
  margin-left: 2px;
}
.field__input,
.field__textarea,
.field__select {
  font-family: inherit;
  font-size: var(--text-base);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-ink);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}
.field__input:focus,
.field__textarea:focus,
.field__select:focus {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px var(--color-brand-soft);
}
.field__textarea { resize: vertical; min-height: 100px; }
.field__hint  { font-size: var(--text-sm); color: var(--color-ink-2); }
.field__error { font-size: var(--text-sm); color: var(--color-danger); }

.field--error .field__input,
.field--error .field__textarea,
.field--error .field__select { border-color: var(--color-danger); }
.field--error .field__input:focus,
.field--error .field__textarea:focus,
.field--error .field__select:focus { box-shadow: 0 0 0 3px var(--color-danger-soft); }

.form { display: flex; flex-direction: column; gap: var(--space-5); }
.form__row {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.form__footer {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  padding-top: var(--space-4);
  border-top: var(--border);
}

/* ============================================================
   BADGE / STATUS COMPONENT
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px var(--space-2);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.badge--success { color: var(--color-success); background: var(--color-success-soft); }
.badge--warn    { color: var(--color-warn);    background: var(--color-warn-soft); }
.badge--danger  { color: var(--color-danger);  background: var(--color-danger-soft); }
.badge--info    { color: var(--color-brand);   background: var(--color-brand-soft); }
.badge--neutral { color: var(--color-ink-2);   background: var(--color-bg-subtle); }
.badge--purple  { color: var(--color-purple);  background: var(--color-purple-soft); }

/* ============================================================
   TABLE COMPONENT
   ============================================================ */
.table-wrap {
  overflow-x: auto;
  border: var(--border);
  border-radius: var(--radius-md);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}
.table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-ink-2);
  background: var(--color-bg-subtler);
  border-bottom: var(--border);
}
.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border);
  color: var(--color-ink-1);
  vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: var(--color-bg-hover); }
.table__actions { text-align: right; width: 1%; white-space: nowrap; }

/* ============================================================
   TABS COMPONENT
   ============================================================ */
.tabs { display: flex; flex-direction: column; }
.tabs__list {
  display: flex;
  gap: 0;
  border-bottom: var(--border);
  overflow-x: auto;
}
.tabs__tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-2);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.tabs__tab:hover { color: var(--color-ink); }
.tabs__tab[aria-selected="true"] {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
}
.tabs__panel { padding-top: var(--space-5); }
.tabs__panel[hidden] { display: none; }

/* ============================================================
   TOAST / NOTIFICATION
   ============================================================ */
#toasts {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-toast);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elev);
  border: var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  pointer-events: auto;
  min-width: 260px;
  max-width: 400px;
  animation: toast-in var(--transition-default) var(--ease-out-cubic);
}
.toast--success { border-left: 3px solid var(--color-success); }
.toast--warn    { border-left: 3px solid var(--color-warn); }
.toast--danger  { border-left: 3px solid var(--color-danger); }
.toast--info    { border-left: 3px solid var(--color-brand); }

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

/* ============================================================
   MODAL / DIALOG
   ============================================================ */
dialog.modal {
  padding: 0;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  background: var(--color-bg-elev);
  max-width: 560px;
  width: calc(100% - var(--space-8));
}
dialog.modal::backdrop {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}
.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: var(--border);
}
.modal__title { font-size: var(--text-xl); font-weight: 600; }
.modal__close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-ink-2);
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}
.modal__close:hover { color: var(--color-ink); }
.modal__body   { padding: var(--space-6); }
.modal__footer {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding: var(--space-4) var(--space-6);
  border-top: var(--border);
}

/* ============================================================
   STAT CARD
   ============================================================ */
.stat-card {
  background: var(--color-bg-elev);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.stat-card__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-2);
}
.stat-card__value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1;
}
.stat-card__delta {
  font-size: var(--text-sm);
  font-weight: 500;
}
.stat-card__delta--up   { color: var(--color-success); }
.stat-card__delta--down { color: var(--color-danger); }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-16) var(--space-8);
  text-align: center;
  color: var(--color-ink-2);
}
.empty-state__icon { color: var(--color-ink-3); }
.empty-state__title { font-size: var(--text-xl); font-weight: 600; color: var(--color-ink); }
.empty-state__desc  { font-size: var(--text-base); max-width: 360px; }

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: center;
  padding: var(--space-4) 0;
}
.pagination__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-2);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  border: var(--border);
  background: var(--color-bg-elev);
  color: var(--color-ink-1);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}
.pagination__btn:hover { background: var(--color-bg-hover); }
.pagination__btn[aria-current="page"] {
  background: var(--color-brand);
  color: white;
  border-color: var(--color-brand);
}
.pagination__btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============================================================
   AVATAR
   ============================================================ */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-brand-soft);
  color: var(--color-brand);
  font-weight: 600;
  font-size: var(--text-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.avatar--sm  { width: 28px; height: 28px; font-size: var(--text-xs); }
.avatar--md  { width: 36px; height: 36px; }
.avatar--lg  { width: 48px; height: 48px; font-size: var(--text-md); }
.avatar--xl  { width: 64px; height: 64px; font-size: var(--text-xl); }
.avatar img  { width: 100%; height: 100%; object-fit: cover; }

/* ============================================================
   LOADING / SKELETON
   ============================================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-subtle) 25%,
    var(--color-bg-hover) 50%,
    var(--color-bg-subtle) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius);
}
@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-brand);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   DROPDOWN MENU
   ============================================================ */
.menu {
  position: relative;
  display: inline-block;
}
.menu__list {
  position: absolute;
  top: calc(100% + var(--space-1));
  right: 0;
  min-width: 180px;
  background: var(--color-bg-elev);
  border: var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-dropdown);
  padding: var(--space-1) 0;
  list-style: none;
}
.menu__list[hidden] { display: none; }
.menu__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-ink-1);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  text-decoration: none;
  transition: background var(--transition-fast);
}
.menu__item:hover { background: var(--color-bg-hover); }
.menu__item--danger { color: var(--color-danger); }
.menu__divider { height: 1px; background: var(--color-border); margin: var(--space-1) 0; }

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress {
  height: 6px;
  background: var(--color-bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  background: var(--color-brand);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}
.progress__bar--success { background: var(--color-success); }
.progress__bar--warn    { background: var(--color-warn); }
.progress__bar--danger  { background: var(--color-danger); }

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--color-ink-2); }
.text-brand  { color: var(--color-brand); }
.text-danger { color: var(--color-danger); }
.text-success{ color: var(--color-success); }

.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2       { gap: var(--space-2); }
.gap-3       { gap: var(--space-3); }
.gap-4       { gap: var(--space-4); }

.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }

.w-full { width: 100%; }
.hidden { display: none; }
.visually-hidden { @extend .sr-only; }