/* ================================================================
   CommodityTrax — Shared Components
   Token-driven (tokens.css --ct-* vars). Light + dark.
   WCAG 2.2 AA. No hardcoded hexes.
   ================================================================ */

/* ================================================================
   BUTTON
   Sizes: --sm / --md / --lg
   Variants: primary / secondary / tertiary / danger
   States: default / hover / focus-visible / disabled
   Min 44px touch on primary (mobile)
   ================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ct-space-2);
  font-family: var(--ct-font);
  font-size: var(--ct-text-body-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  border: 1.5px solid transparent;
  border-radius: var(--ct-radius-sm);
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease,
              color .15s ease, opacity .15s ease, box-shadow .15s ease;
  min-height: 44px;
  padding: 0 var(--ct-space-4);
  white-space: nowrap;
  -webkit-font-smoothing: antialiased;
}

.btn--sm  { min-height: 32px; padding: 0 var(--ct-space-3); font-size: 13px; }
.btn--md  { min-height: 40px; padding: 0 var(--ct-space-4); }
.btn--lg  { min-height: 48px; padding: 0 var(--ct-space-6); font-size: var(--ct-text-body); }

/* PRIMARY — navy fill, white text */
.btn--primary {
  background: var(--ct-navy);
  color: #fff;
  border-color: var(--ct-navy);
}
.btn--primary:hover  { background: var(--ct-navy-hover); border-color: var(--ct-navy-hover); }
.btn--primary:focus  { outline: 2px solid var(--ct-navy); outline-offset: 2px; box-shadow: 0 0 0 3px rgba(27,58,91,.15); }
.btn--primary:disabled { opacity: .4; cursor: not-allowed; }

/* SECONDARY — transparent, navy border, navy text */
.btn--secondary {
  background: transparent;
  color: var(--ct-navy);
  border-color: var(--ct-navy);
}
.btn--secondary:hover  { background: var(--ct-navy); color: #fff; }
.btn--secondary:focus   { outline: 2px solid var(--ct-navy); outline-offset: 2px; }
.btn--secondary:disabled { opacity: .4; cursor: not-allowed; }

/* TERTIARY — text link style */
.btn--tertiary {
  background: transparent;
  color: var(--ct-navy);
  border-color: transparent;
  min-height: 32px;
  padding: 0;
}
.btn--tertiary:hover  { color: var(--ct-navy-hover); text-decoration: underline; }
.btn--tertiary:focus  { outline: 2px solid var(--ct-navy); outline-offset: 2px; }
.btn--tertiary:disabled { opacity: .4; cursor: not-allowed; }

/* DANGER */
.btn--danger {
  background: var(--ct-alert);
  color: #fff;
  border-color: var(--ct-alert);
}
.btn--danger:hover  { background: #b83908; border-color: #b83908; }
.btn--danger:focus  { outline: 2px solid var(--ct-alert); outline-offset: 2px; }
.btn--danger:disabled { opacity: .4; cursor: not-allowed; }

/* ================================================================
   FORM INPUTS
   ================================================================ */

.form-field     { display: flex; flex-direction: column; gap: var(--ct-space-2); }
.form-label     { font-size: var(--ct-text-body-sm); font-weight: 500; color: var(--ct-text); cursor: pointer; }
.form-helper    { font-size: var(--ct-text-caption); color: var(--ct-text-secondary); line-height: 1.4; }
.form-error     { font-size: var(--ct-text-caption); color: var(--ct-alert); line-height: 1.4; display: flex; align-items: center; gap: 4px; }

.form-input {
  font-family: var(--ct-font);
  font-size: 16px; /* prevents mobile zoom */
  color: var(--ct-text);
  background: var(--ct-surface);
  border: 1.5px solid var(--ct-border);
  border-radius: var(--ct-radius-sm);
  padding: 10px var(--ct-space-3);
  width: 100%;
  min-height: 44px;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  transition: border-color .15s ease, box-shadow .15s ease;
  appearance: none;
}
.form-input::placeholder { color: var(--ct-text-disabled); }
.form-input:focus { outline: none; border-color: var(--ct-link); box-shadow: 0 0 0 3px rgba(11,95,165,.15); }
.form-input--error { border-color: var(--ct-alert); }
.form-input--error:focus { border-color: var(--ct-alert); box-shadow: 0 0 0 3px rgba(213,67,9,.15); }
.form-input:disabled { background: var(--ct-surface-alt); color: var(--ct-text-disabled); cursor: not-allowed; }

/* Select */
.form-select {
  font-family: var(--ct-font);
  font-size: 16px;
  color: var(--ct-text);
  background: var(--ct-surface);
  border: 1.5px solid var(--ct-border);
  border-radius: var(--ct-radius-sm);
  padding: 10px 36px 10px var(--ct-space-3);
  width: 100%;
  min-height: 44px;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  transition: border-color .15s ease, box-shadow .15s ease;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23586273' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 36px;
}
.form-select:focus { outline: none; border-color: var(--ct-link); box-shadow: 0 0 0 3px rgba(11,95,165,.15); }
.form-select--error { border-color: var(--ct-alert); }
.form-select:disabled { background-color: var(--ct-surface-alt); color: var(--ct-text-disabled); cursor: not-allowed; }

/* ================================================================
   LINKS
   ================================================================ */

a.c-link { color: var(--ct-link); text-decoration: none; transition: color .15s ease; }
a.c-link:hover { text-decoration: underline; }

/* ================================================================
   FOCUS VISIBLE (keyboard-only focus ring)
   ================================================================ */

:focus:not(:focus-visible) { outline: none; }
:focus-visible { outline: 2px solid var(--ct-link); outline-offset: 2px; }

/* ================================================================
   CARD
   surface bg, radius-md, shadow-sm
   Optional left-accent border (--accent-left: 4px solid var(--ct-navy))
   ================================================================ */

.c-card {
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-md);
  overflow: hidden;
  box-shadow: var(--ct-shadow-sm);
}
.c-card--accent { border-left: 4px solid var(--ct-navy); }

.c-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ct-space-3);
  padding: var(--ct-space-4) var(--ct-space-6);
  border-bottom: 1px solid var(--ct-border);
}
.c-card__title {
  font-size: 18px; font-weight: 600; color: var(--ct-text); line-height: 1.4; margin: 0;
}
.c-card__body  { padding: var(--ct-space-6); }
.c-card__footer {
  padding: var(--ct-space-3) var(--ct-space-6);
  border-top: 1px solid var(--ct-border);
  background: var(--ct-surface-alt);
}
.c-card__footer-text {
  font-size: var(--ct-text-caption); color: var(--ct-text-secondary); line-height: 1.4; margin: 0;
}

/* ================================================================
   RISK PILL — the signature element
   Props: data-tier="clear|watch|alert|stale"
   Icon shape + text label + tint background. Never color alone.
   SVG icons inlined for zero-dependency rendering.
   ================================================================ */

.risk-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--ct-font);
  font-size: var(--ct-text-caption);
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1;
  padding: 4px 10px;
  border-radius: var(--ct-radius-pill);
  border: 1px solid transparent;
  white-space: nowrap;
  vertical-align: middle;
}

.risk-pill svg { flex-shrink: 0; width: 13px; height: 13px; }

/* CLEAR */
.risk-pill[data-tier='clear'] {
  background: var(--ct-clear-tint);
  color: var(--ct-clear);
  border-color: rgba(0,114,178,.2);
}

/* WATCH */
.risk-pill[data-tier='watch'] {
  background: var(--ct-watch-tint);
  color: #7A5500;
  border-color: rgba(229,160,0,.2);
}

/* ALERT */
.risk-pill[data-tier='alert'] {
  background: var(--ct-alert-tint);
  color: #922C06;
  border-color: rgba(213,67,9,.2);
}

/* STALE / no data */
.risk-pill[data-tier='stale'] {
  background: var(--ct-surface-alt);
  color: var(--ct-text-secondary);
  border-color: var(--ct-border);
}

/* Dark mode */
[data-theme='dark'] .risk-pill[data-tier='clear'] {
  background: var(--ct-clear-tint-dark);
  color: #9ECBFF;
  border-color: rgba(69,137,255,.25);
}
[data-theme='dark'] .risk-pill[data-tier='watch'] {
  background: var(--ct-watch-tint-dark);
  color: #F1C21B;
  border-color: rgba(241,194,27,.25);
}
[data-theme='dark'] .risk-pill[data-tier='alert'] {
  background: var(--ct-alert-tint-dark);
  color: #FF9DA0;
  border-color: rgba(250,77,86,.25);
}
[data-theme='dark'] .risk-pill[data-tier='stale'] {
  background: var(--ct-surface-alt);
  color: var(--ct-text-secondary);
  border-color: var(--ct-border);
}

/* ================================================================
   PROVENANCE FOOTER
   Named source + freshness date. IBM Plex Mono, secondary text.
   Source icon via inline SVG.
   ================================================================ */

.provenance {
  display: flex;
  align-items: center;
  gap: var(--ct-space-2);
  font-family: var(--ct-font-mono);
  font-size: var(--ct-text-caption);
  color: var(--ct-text-secondary);
  line-height: 1.4;
}
.provenance__icon { flex-shrink: 0; width: 13px; height: 13px; }
.provenance__source { font-weight: 500; }
.provenance__sep { color: var(--ct-border-strong); }
.provenance__date { }

/* ================================================================
   DATA TABLE
   Sticky header + frozen first column + right-aligned numbers.
   1px row rules + row hover. Responsive collapse at ~640px.
   ================================================================ */

.c-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-md);
  background: var(--ct-surface);
}

.c-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--ct-text-table);
  line-height: var(--ct-lh-table);
  white-space: nowrap;
}

.c-table thead { position: sticky; top: 0; z-index: 2; }

.c-table th {
  background: var(--ct-surface-alt);
  font-size: 13px;
  font-weight: 600;
  color: var(--ct-text-secondary);
  text-align: left;
  padding: 10px var(--ct-space-4);
  border-bottom: 1px solid var(--ct-border);
  white-space: nowrap;
}

/* Frozen first column */
.c-table th:first-child,
.c-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--ct-surface);
  border-right: 1px solid var(--ct-border);
}
.c-table th:first-child { z-index: 3; }

.c-table tbody tr { border-bottom: 1px solid var(--ct-border); }
.c-table tbody tr:last-child { border-bottom: none; }
.c-table tbody tr:hover { background: var(--ct-surface-alt); }

.c-table td {
  padding: 10px var(--ct-space-4);
  color: var(--ct-text);
  vertical-align: middle;
}

/* Right-aligned numbers */
.c-table .tnum { text-align: right; font-variant-numeric: lining-nums tabular-nums; }

/* Sortable header (indicator only — state managed via data attrs) */
.c-table th[data-sortable] { cursor: pointer; user-select: none; }
.c-table th[data-sortable]:hover { color: var(--ct-text); }

/* Mobile: stacked cards */
@media (max-width: 640px) {
  .c-table-wrap { overflow: visible; }

  .c-table, .c-table thead, .c-table tbody,
  .c-table th, .c-table td, .c-table tr { display: block; }
  .c-table thead { display: none; }
  .c-table tbody tr {
    border: 1px solid var(--ct-border);
    border-radius: var(--ct-radius-md);
    padding: var(--ct-space-4);
    margin-bottom: var(--ct-space-3);
    background: var(--ct-surface);
  }
  .c-table tbody tr:hover { background: var(--ct-surface-alt); }
  .c-table td:first-child {
    position: static;
    border-right: none;
    background: transparent;
    padding-top: 0;
    font-weight: 600;
    font-size: var(--ct-text-body-sm);
    color: var(--ct-text);
  }
  .c-table td { padding: 3px 0; display: flex; justify-content: space-between; align-items: center; gap: var(--ct-space-4); border-bottom: 1px solid var(--ct-border); }
  .c-table td:last-child { border-bottom: none; }
  .c-table td[data-label]::before {
    content: attr(data-label);
    font-size: var(--ct-text-caption);
    font-weight: 600;
    color: var(--ct-text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* ================================================================
   SKELETON LOADER
   Animated pulse. Respects prefers-reduced-motion.
   Error state fallback. No infinite skeleton.
   ================================================================ */

@keyframes skeleton-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}

.skeleton {
  display: block;
  background: var(--ct-surface-alt);
  border-radius: var(--ct-radius-sm);
}
.skeleton--text    { height: 14px; width: 100%; }
.skeleton--heading { height: 22px; width: 60%; }
.skeleton--badge   { height: 22px; width: 64px; border-radius: var(--ct-radius-pill); }
.skeleton--rect    { height: 80px; width: 100%; }
.skeleton--chart   { height: 120px; width: 100%; }
.skeleton--animate { animation: skeleton-pulse 1.6s ease-in-out infinite; }

@media (prefers-reduced-motion: reduce) {
  .skeleton--animate { animation: none; }
}

/* ================================================================
   EMPTY STATE
   Centered icon + heading + explanation + optional action.
   Mirror existing "No commodity data yet" style.
   ================================================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--ct-space-12) var(--ct-space-8);
  gap: var(--ct-space-4);
}

.empty-state__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--ct-surface-alt);
  color: var(--ct-text-secondary);
  margin-bottom: var(--ct-space-2);
}
.empty-state__icon svg { width: 28px; height: 28px; stroke-width: 1.5; flex-shrink: 0; }

.empty-state__heading {
  font-size: 18px; font-weight: 600; color: var(--ct-text); line-height: 1.4; margin: 0;
}
.empty-state__body {
  font-size: var(--ct-text-body-sm); color: var(--ct-text-secondary);
  line-height: var(--ct-lh-body-sm); max-width: 320px; margin: 0;
}
.empty-state__action { margin-top: var(--ct-space-2); }