:root {
  --border: #ccc;
  --bg: #f4f6f4;
  --tile-bg: #fff;
  --tile-empty-border: #999;
  --uh-green-dark: #024731;
  --uh-green: #046a38;
  --uh-green-light: #e6f0ea;
  --uh-gold: #c9a227;
  --text: #222;
  --muted: #666;
  --bad: #c0392b;
  --bad-bg: #fdecea;
  --warn: #a06a00;
  --warn-bg: #fdf3d7;
  --info: #2c5f8a;
  --info-bg: #e8f0f7;

  /* One color per requirement type: tile background, plus a stronger stripe. */
  --cat-fixed: #d9ead9;   --cat-fixed-edge: #5a9b6a;
  --cat-group1: #cfe0f3;  --cat-group1-edge: #4a7fb8;
  --cat-group2: #ddd5f0;  --cat-group2-edge: #7a62b3;
  --cat-te: #f5e6b8;      --cat-te-edge: #c09a2a;
  --cat-eb: #f3d6c4;      --cat-eb-edge: #c2703f;
  --cat-gened: #d3ebe8;   --cat-gened-edge: #3d9488;
  --cat-extra: #eee;      --cat-extra-edge: #999;

  /* Public Sans for text and IBM Plex Mono for course codes (the prereq
     map's own), Montserrat for the page title. Each falls back to a
     system font if the web font doesn't load. */
  --sans: "Public Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --display: "Montserrat", "Public Sans", system-ui, "Segoe UI", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
}

button,
select,
input {
  font-family: inherit;
}

.app-header {
  padding: 12px 20px;
  background: var(--uh-green-dark);
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.app-header h1 {
  margin: 0;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0;
}

.app-sub {
  font-size: 12px;
  opacity: 0.8;
}

.viz-link {
  margin-left: auto;
  color: var(--uh-gold);
  text-decoration: none;
  font-size: 13px;
  font-weight: bold;
  white-space: nowrap;
}

.viz-link:hover,
.viz-link:focus-visible {
  text-decoration: underline;
}

/* ---------- toolbar ---------- */

.toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 14px;
  padding: 10px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.tb-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
}

.tb-field select {
  font-size: 13px;
  padding: 5px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: #fff;
  max-width: 240px;
}

.tb-spacer {
  flex: 1;
}

.tb-total {
  font-size: 13px;
  font-weight: bold;
  color: var(--uh-green-dark);
  align-self: center;
}

.seg {
  display: inline-flex;
  border: 1px solid var(--uh-green);
  border-radius: 3px;
  overflow: hidden;
}

.seg button {
  border: 0;
  background: #fff;
  color: var(--uh-green-dark);
  font-size: 13px;
  padding: 5px 10px;
  cursor: pointer;
}

.seg button + button {
  border-left: 1px solid var(--uh-green);
}

.seg button.on {
  background: var(--uh-green);
  color: #fff;
}

.btn {
  display: inline-block;
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 3px;
  border: 1px solid var(--uh-green);
  background: #fff;
  color: var(--uh-green-dark);
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--uh-green-light);
}

.btn:disabled {
  border-color: var(--border);
  color: #aaa;
  background: #fff;
  cursor: default;
}

.btn.on {
  background: var(--uh-green-light);
  font-weight: bold;
}

.btn.primary {
  background: var(--uh-green);
  color: #fff;
}

.btn.primary:hover {
  background: var(--uh-green-dark);
}

.btn.quiet {
  border-color: var(--border);
  color: #555;
}

.btn.small {
  padding: 3px 8px;
  font-size: 12px;
  white-space: nowrap;
}

.btn.danger {
  border-color: var(--bad);
  color: var(--bad);
}

.btn.danger:hover {
  background: var(--bad-bg);
}

.notice {
  margin: 12px 20px 0;
  max-width: 1100px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--info);
  border-radius: 4px;
  background: var(--info-bg);
  color: #1d4466;
  font-size: 13px;
  line-height: 1.4;
}

.notice[hidden] {
  display: none;
}

.notice span {
  flex: 1;
}

.instructions {
  margin: 12px 20px 0;
  max-width: 1100px;
  font-size: 13px;
  line-height: 1.45;
  color: #444;
}

/* ---------- page layout: vertical vs horizontal ---------- */

.layout {
  padding: 16px 20px 24px;
  display: grid;
  gap: 24px;
  align-items: start;
}

.layout-vertical .layout {
  grid-template-columns: minmax(0, 1fr) 380px;
}

.layout-horizontal .layout {
  grid-template-columns: minmax(0, 1fr);
}

.plan-panel,
.side-panel {
  min-width: 0;
}

.layout-vertical .side-panel {
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 76px);
  overflow-y: auto;
  padding-right: 4px;
}

.layout-horizontal .side-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  align-items: start;
}

.layout-horizontal .requirements {
  column-width: 320px;
  column-gap: 24px;
}

.layout-horizontal .requirements .panel-title {
  column-span: all;
}

.panel-title {
  font-size: 14px;
  text-transform: uppercase;
  color: var(--uh-green-dark);
  margin: 0 0 8px 0;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin-bottom: 10px;
  font-size: 11px;
  color: #555;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  border: 1px solid var(--border);
  border-left-width: 3px;
}

/* ---------- board ---------- */

.board {
  display: flex;
  gap: 6px;
}

.layout-vertical .board {
  flex-direction: column;
}

.layout-horizontal .board {
  flex-direction: row;
  align-items: flex-start;
  overflow-x: auto;
  padding-bottom: 10px;
  gap: 10px;
}

/* The completed bucket in the horizontal layout: one full-width row of
   compact tiles above the semester columns. */
.board-top:empty {
  display: none;
}

.board-top {
  margin-bottom: 10px;
}

.layout-horizontal .board-top .semester {
  width: auto;
}

.layout-horizontal .board-top .tiles {
  flex-direction: row;
  flex-wrap: wrap;
}

.layout-horizontal .board-top .tile {
  width: 150px;
}

.layout-horizontal .board-top .tile-title {
  -webkit-line-clamp: 1;
}

.tiles[hidden] {
  display: none;
}

.semester.collapsed .semester-head {
  margin-bottom: 2px;
}

.semester {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px 10px;
}

.layout-horizontal .semester {
  flex: 0 0 190px;
  width: 190px;
}

.semester.transfer {
  border-left: 3px solid var(--uh-gold);
}

.semester.past {
  background: #f7f8f7;
}

.semester-done {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--uh-green);
  border: 1px solid var(--cat-fixed-edge);
  border-radius: 8px;
  padding: 0 5px;
  white-space: nowrap;
}

.semester.drop-target {
  border-color: var(--uh-green);
  background: var(--uh-green-light);
}

.semester.flash,
.tile.flash {
  animation: flash 1.2s ease;
}

@keyframes flash {
  0%, 60% { box-shadow: 0 0 0 3px var(--uh-gold); }
  100% { box-shadow: 0 0 0 3px transparent; }
}

.semester-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  margin-bottom: 8px;
}

/* A term name never breaks or shrinks under its neighbors: when the header
   is too narrow (the horizontal layout's columns), the "completed" tag
   drops to its own line below instead. The long transfer-bucket name is the
   exception and wraps as ordinary text. */
.semester:not(.transfer) .semester-name {
  flex: 1 0 auto;
  white-space: nowrap;
}

/* Side-by-side columns are narrow, so their header is a fixed two-row grid
   rather than a wrapping line: the name, Gap and the remove button always
   share the first row (however long the term's name -- "Summer 2026" used to
   push the button down a line), credits and the "completed" tag the second. */
.layout-horizontal .board .semester-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 3px 6px;
}

.layout-horizontal .board .semester-name {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layout-horizontal .board .semester-gap {
  grid-column: 2;
  grid-row: 1;
}

.layout-horizontal .board .semester-remove {
  grid-column: 3;
  grid-row: 1;
}

.layout-horizontal .board .semester-credits,
.layout-horizontal .board .semester-done {
  grid-row: 2;
  justify-self: start;
}

.layout-horizontal .board .semester-credits {
  grid-column: 1;
  padding-left: 0;
}

.layout-horizontal .board .semester-done {
  grid-column: 1 / -1;
  margin-left: 44px;
}

.semester-name {
  margin: 0;
  font-size: 14px;
  flex: 1;
  min-width: 0;
}

.semester-credits {
  font-size: 12px;
  color: #555;
  white-space: nowrap;
  padding: 1px 6px;
  border-radius: 10px;
}

.semester-credits.issue-error {
  background: var(--bad-bg);
  color: var(--bad);
  font-weight: bold;
}

.semester-credits.issue-warn {
  background: var(--warn-bg);
  color: var(--warn);
  font-weight: bold;
}

.semester-gap {
  border: 1px solid var(--border);
  border-radius: 3px;
  background: #fff;
  color: #555;
  font-size: 11px;
  padding: 1px 6px;
  cursor: pointer;
}

.semester-gap:hover {
  border-color: #888;
  color: var(--text);
}

.semester-gap.on {
  background: #666;
  border-color: #666;
  color: #fff;
}

.semester.gap {
  border-style: dashed;
  background: transparent;
}

.gap-note {
  font-size: 12px;
  font-style: italic;
  color: #888;
  padding: 2px 0 4px;
}

.semester-remove {
  border: none;
  background: transparent;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  color: #888;
  padding: 0 2px;
}

.semester-remove:hover {
  color: var(--bad);
}

.tiles {
  display: flex;
  gap: 8px;
}

.layout-vertical .tiles {
  flex-wrap: wrap;
}

.layout-horizontal .tiles {
  flex-direction: column;
  gap: 6px;
}

/* ---------- tiles ---------- */

.tile {
  position: relative;
  flex: 0 0 auto;
  width: 122px;
  min-height: 92px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--cat-extra-edge);
  border-radius: 4px;
  background: var(--tile-bg);
  padding: 6px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
}

.layout-horizontal .tile {
  width: 100%;
  min-height: 0;
}

.tile:hover {
  border-color: #888;
}

.tile:focus-visible {
  outline: 2px solid var(--uh-green);
  outline-offset: 1px;
}

.tile.dragging {
  opacity: 0.4;
}

.tile.cat-fixed, .legend-swatch.cat-fixed { background: var(--cat-fixed); border-left-color: var(--cat-fixed-edge); }
.tile.cat-group1, .legend-swatch.cat-group1 { background: var(--cat-group1); border-left-color: var(--cat-group1-edge); }
.tile.cat-group2, .legend-swatch.cat-group2 { background: var(--cat-group2); border-left-color: var(--cat-group2-edge); }
.tile.cat-te, .legend-swatch.cat-te { background: var(--cat-te); border-left-color: var(--cat-te-edge); }
.tile.cat-eb, .legend-swatch.cat-eb { background: var(--cat-eb); border-left-color: var(--cat-eb-edge); }
.tile.cat-gened, .legend-swatch.cat-gened { background: var(--cat-gened); border-left-color: var(--cat-gened-edge); }
.tile.cat-premed, .legend-swatch.cat-premed { background: #f6d5e3; border-left-color: #c2507f; }
.tile.cat-extra, .legend-swatch.cat-extra { background: var(--cat-extra); border-left-color: var(--cat-extra-edge); }

.tile.placeholder {
  background: #fff;
  border-style: dashed;
  border-left-style: solid;
}

.tile.placeholder .tile-title {
  color: var(--uh-green);
  font-style: italic;
}

.tile.add {
  border: 1px dashed var(--tile-empty-border);
  color: #777;
  background: transparent;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.layout-horizontal .tile.add {
  padding: 8px 6px;
}

.tile.add:hover {
  border-color: var(--uh-green);
  color: var(--uh-green-dark);
  background: var(--uh-green-light);
}

.tile.issue-error {
  box-shadow: inset 0 0 0 2px var(--bad);
}

.tile.issue-warn {
  box-shadow: inset 0 0 0 2px var(--uh-gold);
}

.tile-code {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.02em;
  padding-right: 14px;
}

.tile-title {
  font-size: 11px;
  line-height: 1.25;
  flex: 1;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.layout-horizontal .tile-title {
  -webkit-line-clamp: 2;
}

.tile-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 4px;
  font-size: 11px;
  color: #555;
}

.tile-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  min-width: 0;
}

.tile-cr {
  white-space: nowrap;
}

.tile-x {
  position: absolute;
  top: 1px;
  right: 2px;
  border: 0;
  background: transparent;
  color: #777;
  font-size: 15px;
  line-height: 1;
  padding: 2px 3px;
  cursor: pointer;
  opacity: 0;
}

.tile:hover .tile-x,
.tile:focus-within .tile-x {
  opacity: 1;
}

.tile-x:hover {
  color: var(--bad);
}

@media (hover: none) {
  .tile-x { opacity: 1; }
}

.tile-flag {
  position: absolute;
  top: -6px;
  left: -6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--uh-gold);
  color: #fff;
  font-size: 11px;
  font-weight: bold;
  line-height: 16px;
  text-align: center;
}

.tile.issue-error .tile-flag {
  background: var(--bad);
}

.tag {
  display: inline-block;
  font-size: 10px;
  line-height: 1.3;
  padding: 0 4px;
  border-radius: 8px;
  white-space: nowrap;
}

.tag-req {
  background: rgba(255, 255, 255, 0.7);
  color: #444;
}

.tag-focus {
  background: var(--uh-gold);
  color: #fff;
  font-weight: bold;
}

.tag-gened {
  background: var(--cat-gened);
  color: #1f5a52;
}

.tag-covers {
  background: var(--uh-green-light);
  color: var(--uh-green-dark);
  font-weight: bold;
}

.loading,
.empty-board {
  padding: 24px;
  font-size: 13px;
  color: var(--muted);
}

.load-error {
  background: var(--bad-bg);
  border: 1px solid var(--bad);
  color: #7a1f14;
  padding: 12px;
  border-radius: 4px;
  font-size: 13px;
}

/* ---------- requirements panel ---------- */

.req-section {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 10px;
  break-inside: avoid;
}

.req-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.req-section-head h3 {
  margin: 0;
  font-size: 13px;
  color: var(--uh-green-dark);
}

.req-section-sub {
  font-size: 11px;
  color: var(--muted);
  text-align: right;
}

.req-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.req-chip {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 10px;
  border: 1px dashed #999;
  background: #fff;
  color: #444;
}

button.req-chip {
  cursor: pointer;
}

button.req-chip:hover {
  border-color: var(--uh-green);
  background: var(--uh-green-light);
}

.req-chip.met {
  border: 1px solid var(--cat-fixed-edge);
  background: var(--cat-fixed);
  color: var(--uh-green-dark);
}

.req-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 5px 0;
  border-top: 1px solid #eee;
}

.req-section-head + .req-row {
  border-top: 0;
}

.req-mark {
  flex: 0 0 16px;
  font-size: 13px;
  line-height: 1.3;
  color: #999;
  text-align: center;
}

.req-row.met .req-mark {
  color: var(--uh-green);
  font-weight: bold;
}

.req-row.partial .req-mark {
  color: var(--warn);
}

.req-body {
  flex: 1;
  min-width: 0;
}

.req-name {
  font-size: 12px;
  font-weight: bold;
}

.req-detail {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
  overflow-wrap: anywhere;
}

/* ---------- rule check report ---------- */

.report {
  margin-bottom: 14px;
}

.verdict {
  border-radius: 6px;
  padding: 10px 12px;
  border: 1px solid;
  margin-bottom: 10px;
}

.verdict.good { background: var(--uh-green-light); border-color: var(--uh-green); color: var(--uh-green-dark); }
.verdict.caution { background: var(--warn-bg); border-color: var(--uh-gold); color: #5c3d00; }
.verdict.bad { background: var(--bad-bg); border-color: var(--bad); color: #7a1f14; }

.verdict-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  font-size: 14px;
}

.verdict-sub {
  font-size: 11px;
  margin-top: 2px;
  opacity: 0.85;
}

.report-group {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
}

.report-group h3 {
  margin: 0 0 4px;
  font-size: 13px;
  color: var(--uh-green-dark);
}

.issues {
  list-style: none;
  margin: 0;
  padding: 0;
}

.issue {
  font-size: 12px;
  line-height: 1.4;
  padding: 4px 2px;
  border-top: 1px solid #eee;
}

.issue:first-child {
  border-top: 0;
}

.issue-head {
  display: flex;
  gap: 8px;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.issue-head:hover .issue-text {
  text-decoration: underline;
  text-decoration-color: #bbb;
}

.issue-chevron {
  flex: 0 0 16px;
  color: #555;
  font-size: 15px;
  line-height: 1.1;
  text-align: center;
}

.issue-head:hover .issue-chevron {
  color: var(--uh-green);
}

.issue-detail {
  margin: 6px 0 4px 24px;
  padding: 8px 10px;
  border-left: 3px solid var(--border);
  background: #f7f8f7;
  border-radius: 0 4px 4px 0;
}

.issue.error .issue-detail { border-left-color: var(--bad); }
.issue.warn .issue-detail { border-left-color: var(--uh-gold); }
.issue.info .issue-detail { border-left-color: var(--info); }

.issue-detail h4 {
  margin: 8px 0 2px;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--muted);
}

.issue-detail h4:first-child {
  margin-top: 0;
}

.issue-detail ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.issue-detail li {
  font-size: 12px;
  line-height: 1.45;
  padding: 1px 0;
  overflow-wrap: anywhere;
}

.issue-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.issue-mark {
  flex: 0 0 16px;
  height: 16px;
  border-radius: 50%;
  font-size: 10px;
  font-weight: bold;
  line-height: 16px;
  text-align: center;
  color: #fff;
  margin-top: 1px;
}

.issue.error .issue-mark { background: var(--bad); }
.issue.warn .issue-mark { background: var(--uh-gold); }
.issue.info .issue-mark { background: var(--info); font-style: italic; font-family: Georgia, serif; }

.issue-text {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}

/* ---------- modals ---------- */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  padding: 16px;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: #fff;
  border-radius: 6px;
  padding: 16px;
  width: 460px;
  max-width: 100%;
  max-height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-content.wide {
  width: 900px;
  height: 86vh;
  overflow: hidden;
}

.modal-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-head h3 {
  margin: 0;
  font-size: 16px;
  flex: 1;
  min-width: 0;
}

.modal-x {
  border: 0;
  background: transparent;
  font-size: 20px;
  line-height: 1;
  color: #777;
  cursor: pointer;
  padding: 0 4px;
}

.modal-x:hover {
  color: var(--bad);
}

.modal-content > label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  gap: 4px;
}

.modal-content input[type="text"],
.modal-content input[type="number"],
.modal-content input[type="search"],
.modal-content select {
  font-size: 13px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: #fff;
}

.modal-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.45;
}

.modal-text.warn {
  color: var(--warn);
}

.modal-text:empty {
  display: none;
}

.modal-actions {
  margin-top: 4px;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.modal-content > label.option {
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
}

.option-detail {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--muted);
}

.req-note {
  margin: 6px 0 2px;
  font-size: 11px;
  line-height: 1.4;
  color: var(--muted);
}

/* picker */

.picker-sem {
  font-size: 13px;
  white-space: nowrap;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.chip {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  color: #444;
  cursor: pointer;
}

.chip:hover {
  border-color: var(--uh-green);
}

.chip.on {
  background: var(--uh-green);
  border-color: var(--uh-green);
  color: #fff;
}

.chip.small {
  padding: 2px 8px;
}

.picker-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
}

.picker-filters input[type="search"] {
  flex: 1 1 240px;
}

.check {
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.check[hidden] {
  display: none;
}

.picker-levels {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}

.picker-levels-label {
  color: var(--muted);
  margin-right: 2px;
}

.picker-focus {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}

.picker-hint {
  margin: 0;
  font-size: 12px;
  line-height: 1.4;
  color: var(--muted);
}

.picker-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.picker-row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr) 52px 150px 170px;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 6px 10px;
  border: 0;
  border-bottom: 1px solid #eee;
  background: #fff;
  font-size: 12px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
}

.picker-row:hover,
.picker-row:focus-visible {
  background: var(--uh-green-light);
  outline: none;
}

.picker-row.in-plan {
  color: #888;
  background: #f7f7f7;
}

.pr-code {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.pr-main {
  min-width: 0;
}

.pr-title {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pr-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-top: 2px;
}

.pr-tags:empty {
  display: none;
}

.pr-cr {
  color: #555;
  text-align: right;
}

.pr-offered {
  font-size: 11px;
}

.pr-offered.st-yes { color: var(--uh-green); font-weight: bold; }
.pr-offered.st-some { color: var(--warn); }
.pr-offered.st-no { color: var(--bad); }
.pr-offered.st-unknown { color: #888; }

.pr-pre {
  font-size: 11px;
  overflow-wrap: anywhere;
}

.pr-pre.ok { color: var(--uh-green); }
.pr-pre.bad { color: var(--bad); }
.pr-pre.muted { color: #888; }

.picker-empty {
  padding: 24px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.picker-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.picker-count {
  font-size: 12px;
  color: var(--muted);
}

/* details */

.detail-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 10px;
  padding: 7px 0;
  border-top: 1px solid #eee;
  font-size: 13px;
}

.detail-row:first-child {
  border-top: 0;
}

.detail-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 2px;
}

.detail-value input[type="number"] {
  width: 64px;
}

.detail-focus {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
}

.detail-note {
  flex-basis: 100%;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
  margin-top: 3px;
}

.detail-note.warn {
  color: var(--warn);
}

.term-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-top: 5px;
}

.term-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 42px;
  padding: 2px 4px;
  border: 1px solid #ddd;
  border-radius: 3px;
  font-size: 10px;
  color: #999;
}

.term-cell.ran {
  background: var(--uh-green-light);
  border-color: var(--cat-fixed-edge);
  color: var(--uh-green-dark);
}

.term-name {
  font-weight: bold;
}

.app-footer {
  padding: 0 20px 28px;
  max-width: 1100px;
  font-size: 11px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- narrow screens ---------- */

@media (max-width: 980px) {
  .layout-vertical .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .layout-vertical .side-panel {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .toolbar {
    position: static;
  }

  .picker-row {
    grid-template-columns: 74px minmax(0, 1fr) 44px;
  }

  .pr-offered,
  .pr-pre {
    grid-column: 2 / -1;
  }

  .modal-content.wide {
    height: 94vh;
  }
}

@media print {
  .toolbar,
  .instructions,
  .tile.add,
  .tile-x,
  .semester-remove,
  .viz-link,
  .req-row .btn {
    display: none;
  }

  .layout-vertical .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .layout-vertical .side-panel {
    position: static;
    max-height: none;
    overflow: visible;
  }
}

/* The short issue list inside a course's details: mark and text side by
   side, no expander. */
.detail-value .issue {
  display: flex;
  gap: 8px;
}

/* A box the active major doesn't use (Track, for a major with no tracks). */
.tb-field[hidden],
.modal-content > label[hidden] {
  display: none;
}

/* ---------- rated difficulty (local only: see DIFFICULTY_URL in app.js) ---------- */

.tag-diff {
  font-family: var(--mono);
  font-weight: bold;
  background: #e9ecea;
  color: #444;
}

.tag-diff.band-light { background: var(--uh-green-light); color: var(--uh-green-dark); }
.tag-diff.band-hard { background: var(--warn-bg); color: var(--warn); }
.tag-diff.band-vhard { background: var(--bad-bg); color: var(--bad); }

.legend-item .tag-diff {
  margin-right: 2px;
  font-family: inherit;
}

.semester-diff {
  margin: 2px 0 6px;
  padding: 2px 8px;
  border-radius: 4px;
  border-left: 3px solid #c9cfcb;
  background: #f4f5f4;
  font-size: 11px;
  color: #555;
  overflow-wrap: anywhere;
}

.semester-diff-avg {
  font-weight: bold;
  color: var(--text);
}

.semester-diff.level-mid { border-left-color: var(--uh-gold); background: var(--warn-bg); color: #5c3d00; }
.semester-diff.level-high { border-left-color: var(--bad); background: var(--bad-bg); color: #7a1f14; }
.semester-diff.level-high .semester-diff-avg { color: var(--bad); }

.picker-list.has-diff .picker-row {
  grid-template-columns: 86px minmax(0, 1fr) 48px 112px 136px 146px;
}

.pr-diff {
  font-size: 11px;
  color: #555;
  white-space: nowrap;
}

.pr-diff.none {
  color: #999;
}

.diff-head {
  line-height: 1.6;
}

.diff-table {
  width: 100%;
  margin: 6px 0 2px;
  border-collapse: collapse;
  font-size: 12px;
}

.diff-table th,
.diff-table td {
  padding: 3px 8px 3px 0;
  border-bottom: 1px solid #eee;
  text-align: left;
  vertical-align: top;
}

.diff-table th {
  font-size: 10px;
  font-weight: normal;
  text-transform: uppercase;
  color: var(--muted);
}

.diff-table tr.thin td {
  color: #888;
}

@media (max-width: 700px) {
  .picker-list.has-diff .picker-row {
    grid-template-columns: 74px minmax(0, 1fr) 44px;
  }

  .pr-diff {
    grid-column: 2 / -1;
  }
}