/* ---------- Tokens ---------- */

:root {
  /* Spacing */
  --space-0: 0;
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 8px;
  --space-4: 12px;
  --space-5: 16px;
  --space-6: 24px;
  --space-7: 48px;

  /* Type */
  --text-1: 0.75rem;
  --text-2: 0.875rem;
  --text-3: 1rem;
  --text-4: 1.125rem;
  --text-5: 1.5rem;

  /* Palette — grays (light → dark) */
  --gray-0: #fff;
  --gray-1: #fafafa;
  --gray-2: #f0f0f0;
  --gray-3: #eee;
  --gray-4: #ccc;
  --gray-5: #999;
  --gray-6: #555;
  --gray-7: #222;

  /* Palette — blues (light → dark) */
  --blue-1: #eef3ff;
  --blue-2: #d6e2f5;
  --blue-3: #1a4fbf;
  --blue-4: #0d2f7a;

  /* Palette — one-offs */
  --brown-1: #8a6a3a;

  /* Magnitude scale (pill bg + text, scale 0–4) */
  --mag-bg-0:   #eee;
  --mag-text-0: #555;
  --mag-bg-1:   #e8f4ea;
  --mag-text-1: #2c6e3b;
  --mag-bg-2:   #fff5d6;
  --mag-text-2: #7a5b00;
  --mag-bg-3:   #ffe1c2;
  --mag-text-3: #8a4500;
  --mag-bg-4:   #ffd0d0;
  --mag-text-4: #8a1a1a;

  /* Depth viz bands */
  --depth-shallow:      #ffd0d0;
  --depth-intermediate: #ffe9c2;
  --depth-deep:         #d6e2f5;

  /* Semantic aliases */
  --color-text:          var(--gray-7);
  --color-text-muted:    var(--gray-6);
  --color-bg:            var(--gray-0);
  --color-bg-subtle:     var(--gray-1);
  --color-bg-hover:      var(--gray-2);
  --color-bg-row-active: var(--blue-1);
  --color-border:        var(--gray-4);
  --color-border-strong: var(--gray-5);
  --color-border-subtle: var(--gray-3);
  --color-link:          var(--blue-3);
  --color-link-hover:    var(--blue-4);
}

/* ---------- Base ---------- */

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.45;
  max-width: 960px;
  margin-top: 0;
  margin-right: auto;
  margin-bottom: 0;
  margin-left: auto;
  padding-top: var(--space-6);
  padding-right: var(--space-6);
  padding-bottom: var(--space-7);
  padding-left: var(--space-6);
}

h1 {
  font-size: var(--text-5);
  font-weight: 600;
  margin-top: 0;
  margin-right: 0;
  margin-bottom: var(--space-2);
  margin-left: 0;
}
h2 {
  font-size: var(--text-4);
  font-weight: 600;
  margin-top: var(--space-6);
  margin-right: 0;
  margin-bottom: var(--space-3);
  margin-left: 0;
}

a {
  color: var(--color-link);
  text-decoration: underline;
}
a:hover {
  color: var(--color-link-hover);
}

button,
input {
  font: inherit;
  color: inherit;
}
input[type="number"],
input[type="text"] {
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  background: var(--color-bg);
  height: 32px;
  padding-top: 0;
  padding-right: var(--space-3);
  padding-bottom: 0;
  padding-left: var(--space-3);
  box-sizing: border-box;
}
input[type="number"]:focus,
input[type="text"]:focus,
button:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 1px;
}
button {
  background: var(--color-bg-subtle);
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  height: 32px;
  padding-top: 0;
  padding-right: var(--space-4);
  padding-bottom: 0;
  padding-left: var(--space-4);
  box-sizing: border-box;
}
button:hover:not([disabled]) {
  background: var(--color-bg-hover);
}

header {
  margin-bottom: var(--space-5);
}

section {
  margin-bottom: var(--space-5);
}

/* ---------- Layout primitives ---------- */

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

/* ---------- Stats ---------- */

.stats {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.stat {
  display: flex;
  gap: var(--space-2);
}
.stat .label::after {
  content: ": ";
}
.stat .value {
  font-weight: 600;
}

/* ---------- Toolbar (form controls row) ---------- */

.toolbar {
  display: flex;
  align-items: flex-end;
  gap: var(--space-5);
  flex-wrap: wrap;
  padding-top: var(--space-3);
  padding-right: 0;
  padding-bottom: var(--space-3);
  padding-left: 0;
}
.toolbar__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.toolbar button {
  cursor: pointer;
}
.toolbar__status {
  align-self: flex-end;
  padding-bottom: var(--space-3);
}

/* ---------- Dropdown ---------- */

.dropdown {
  position: relative;
  display: inline-block;
}
.dropdown__toggle {
  text-align: left;
  min-width: 160px;
  background: var(--color-bg);
  cursor: pointer;
}
.dropdown__toggle-caret {
  float: right;
  margin-left: var(--space-3);
}
.dropdown__menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  max-height: 300px;
  overflow-y: auto;
  background: var(--color-bg);
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  padding: var(--space-2);
  min-width: 200px;
}
.dropdown__item {
  display: block;
}

/* ---------- Customizable native select (matches .dropdown) ----------
   Uses the new stylable <select> where supported (Chromium 130+) via
   `appearance: base-select`. Older browsers fall back to a plain
   `appearance: none` <select> styled to match the city dropdown.
   See: developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Customizable_select
*/

/* Fallback styling — applies in every browser */
.custom-select {
  appearance: none;
  -webkit-appearance: none;
  min-width: 160px;
  background: var(--color-bg);
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  border-radius: 0;
  padding-top: var(--space-2);
  padding-right: var(--space-6);
  padding-bottom: var(--space-2);
  padding-left: var(--space-3);
  font: inherit;
  color: inherit;
  cursor: pointer;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 12px) 50%,
    calc(100% - 7px) 50%;
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
}
.custom-select > button,
.custom-select selectedcontent {
  /* Hidden in non-supporting browsers (the <button> isn't parsed inside <select>) */
}

/* Progressive enhancement — supporting browsers only */
@supports (appearance: base-select) {
  .custom-select,
  .custom-select::picker(select) {
    appearance: base-select;
  }
  .custom-select {
    background: none;
    border: 0;
    padding: 0;
  }
  .custom-select .dropdown__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 160px;
    background: var(--color-bg);
    border-width: 1px;
    border-style: solid;
    border-color: var(--color-border);
    border-radius: 0;
    padding-top: var(--space-2);
    padding-right: var(--space-3);
    padding-bottom: var(--space-2);
    padding-left: var(--space-3);
    font: inherit;
    color: inherit;
    text-align: left;
    cursor: pointer;
  }
  .custom-select .dropdown__toggle-caret {
    float: none;
    margin-left: var(--space-3);
  }
  .custom-select::picker(select) {
    background: var(--color-bg);
    border-width: 1px;
    border-style: solid;
    border-color: var(--color-border);
    padding: var(--space-2);
    min-width: 200px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: none;
  }
  .custom-select option {
    display: block;
    padding-top: var(--space-2);
    padding-right: var(--space-3);
    padding-bottom: var(--space-2);
    padding-left: var(--space-3);
    background: var(--color-bg);
    color: inherit;
  }
  .custom-select option:hover,
  .custom-select option:focus,
  .custom-select option:checked {
    background: var(--color-bg-hover);
  }
  .custom-select option::checkmark {
    display: none;
  }

  ::picker-icon {
    display: none;
  }
}

/* ---------- Table ---------- */

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.table {
  border-collapse: collapse;
}
.table th,
.table td {
  padding-top: var(--space-3);
  padding-right: var(--space-4);
  padding-bottom: var(--space-3);
  padding-left: var(--space-4);
  text-align: left;
  white-space: nowrap;
  border-bottom-width: 1px;
  border-bottom-style: solid;
  border-bottom-color: var(--color-border-subtle);
}
.table th {
  font-weight: 600;
  border-bottom-width: 1px;
  border-bottom-style: solid;
  border-bottom-color: var(--color-border-strong);
  background: var(--color-bg-subtle);
}
.table .num {
  text-align: right;
}

/* ---------- Sortable headers ---------- */

.th--sortable {
  padding: 0 !important;
}
.th-sort {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  height: 100%;
  padding-top: var(--space-3);
  padding-right: var(--space-4);
  padding-bottom: var(--space-3);
  padding-left: var(--space-4);
  background: transparent;
  border: 0;
  font: inherit;
  font-weight: 600;
  color: inherit;
  cursor: pointer;
  text-align: inherit;
}
.num.th--sortable .th-sort {
  justify-content: flex-end;
}
.th-sort:hover {
  background: var(--color-bg-hover);
}
.th-sort__caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left-width: 5px;
  border-left-style: solid;
  border-left-color: transparent;
  border-right-width: 5px;
  border-right-style: solid;
  border-right-color: transparent;
  opacity: 0.25;
  border-top-width: 6px;
  border-top-style: solid;
  border-top-color: var(--color-text);
}
.th-sort:hover .th-sort__caret {
  opacity: 0.55;
}
.th--sortable.is-sorted .th-sort__caret {
  opacity: 1;
  border-top-color: var(--color-link);
}
.th--sortable.is-sorted.is-asc .th-sort__caret {
  border-top: 0;
  border-bottom-width: 6px;
  border-bottom-style: solid;
  border-bottom-color: var(--color-link);
}

.row--interactive {
  cursor: pointer;
}
.row--interactive:hover {
  background: var(--color-bg-hover);
}
.row--interactive.is-expanded {
  background: var(--color-bg-row-active);
}
.row-detail td {
  padding-top: var(--space-3);
  padding-right: var(--space-4);
  padding-bottom: var(--space-3);
  padding-left: var(--space-4);
  background: var(--color-bg-subtle);
}

/* ---------- Pills (scale 0–4) ---------- */

.pill {
  display: inline-block;
  padding-top: var(--space-1);
  padding-right: var(--space-3);
  padding-bottom: var(--space-1);
  padding-left: var(--space-3);
  border-radius: 999px;
  font-weight: 600;
  font-size: var(--text-2);
}
.pill--scale-0 {
  background: var(--mag-bg-0);
  color: var(--mag-text-0);
}
.pill--scale-1 {
  background: var(--mag-bg-1);
  color: var(--mag-text-1);
}
.pill--scale-2 {
  background: var(--mag-bg-2);
  color: var(--mag-text-2);
}
.pill--scale-3 {
  background: var(--mag-bg-3);
  color: var(--mag-text-3);
}
.pill--scale-4 {
  background: var(--mag-bg-4);
  color: var(--mag-text-4);
}

/* ---------- Pagination ---------- */

.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-3);
  padding-right: 0;
  padding-bottom: var(--space-3);
  padding-left: 0;
  flex-wrap: wrap;
}
.page-btn {
  padding-top: var(--space-2);
  padding-right: var(--space-4);
  padding-bottom: var(--space-2);
  padding-left: var(--space-4);
  cursor: pointer;
}
.page-btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}
.page-info {
  font-size: var(--text-2);
}

/* ---------- Embedded media ---------- */

.detail-grid {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  align-items: flex-start;
}
.embed {
  width: 100%;
  max-width: 600px;
  height: 360px;
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  border-radius: 6px;
}

/* ---------- Depth viz ---------- */

.depth-viz {
  flex: 0 0 220px;
  font-size: var(--text-2);
}
.depth-viz__title {
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.depth-viz__surface {
  font-size: var(--text-1);
  color: var(--color-text-muted);
  border-bottom-width: 2px;
  border-bottom-style: solid;
  border-bottom-color: var(--brown-1);
  padding-bottom: var(--space-1);
  margin-bottom: 0;
}
.depth-viz__bar {
  position: relative;
  width: 80px;
  height: 320px;
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border);
  border-top: none;
  background: var(--color-bg);
}
.depth-viz__band {
  position: absolute;
  left: 0;
  right: 0;
}
.depth-viz__band--shallow {
  background: var(--depth-shallow);
}
.depth-viz__band--intermediate {
  background: var(--depth-intermediate);
}
.depth-viz__band--deep {
  background: var(--depth-deep);
}

.depth-viz__marker {
  position: absolute;
  left: -6px;
  right: -6px;
  height: 0;
  border-top-width: 2px;
  border-top-style: solid;
  border-top-color: var(--color-text);
}
.depth-viz__marker::before {
  content: "";
  position: absolute;
  left: -6px;
  top: -5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text);
}
.depth-viz__label {
  position: absolute;
  left: 90px;
  top: -9px;
  white-space: nowrap;
  font-weight: 600;
}
.depth-viz__legend {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  color: var(--color-text-muted);
}
.depth-viz__sw {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: var(--space-3);
  vertical-align: -1px;
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-border-strong);
}
.depth-viz__sw--shallow {
  background: var(--depth-shallow);
}
.depth-viz__sw--intermediate {
  background: var(--depth-intermediate);
}
.depth-viz__sw--deep {
  background: var(--depth-deep);
}
.depth-viz__blurb {
  margin-top: var(--space-3);
  margin-right: 0;
  margin-bottom: 0;
  margin-left: 0;
  color: var(--color-text-muted);
  font-size: var(--text-2);
  max-width: 200px;
}

/* ---------- Misc ---------- */

.empty {
  color: var(--color-text-muted);
  font-style: italic;
}

/* ---------- Loading spinner overlay ---------- */

.loading-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.65);
  z-index: 50;
}

.loading-overlay[hidden] {
  display: none;
}

.spinner {
  width: 36px;
  height: 36px;
  border-top-width: 3px;
  border-right-width: 3px;
  border-bottom-width: 3px;
  border-left-width: 3px;
  border-top-style: solid;
  border-right-style: solid;
  border-bottom-style: solid;
  border-left-style: solid;
  border-top-color: var(--color-link);
  border-right-color: var(--color-border-subtle);
  border-bottom-color: var(--color-border-subtle);
  border-left-color: var(--color-border-subtle);
  border-radius: 50%;
  animation: spinner-rotate 0.8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2.4s; }
}