:root {
  --color-prep: #b8d4e8;
  --color-required: #e8e8e8;
  --color-critical-border: #1a1a1a;
  --color-core: #f5f5f5;
  --color-bg: #f0f2f5;
  --color-header: #1e3a5f;
  --color-accent: #2a6ebb;
  --color-upstream: #fff3cd;
  --color-downstream: #f8d7da;
  --color-selected: #cce5ff;
  --color-complete: #d4edda;
  --color-locked: #f8f8f8;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 6px;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: #222;
  line-height: 1.4;
}

.site-header {
  background: var(--color-header);
  color: #fff;
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.school-name {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.9;
}

.site-header h1 {
  margin: 0.15rem 0 0;
  font-size: 1.35rem;
}

.map-year {
  margin: 0.1rem 0 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
}

.layout {
  display: grid;
  grid-template-columns: 1fr min(300px, 100%);
  gap: 1rem;
  padding: 1rem;
  max-width: 100%;
  margin: 0 auto;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.map-section {
  overflow-x: auto;
  overflow-y: visible;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  min-width: 0;
}

.degree-map {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: flex-start;
  gap: 0.65rem;
  width: max-content;
  min-width: 100%;
  padding-bottom: 0.5rem;
}

.semester-column {
  flex: 0 0 auto;
  width: 10.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
}

.semester-heading {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-header);
  border-bottom: 2px solid var(--color-header);
  padding-bottom: 0.35rem;
  flex-shrink: 0;
}

.semester-courses {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  align-items: stretch;
}

.course-card {
  background: var(--color-required);
  border: 1px solid #999;
  border-radius: var(--radius);
  padding: 0.45rem 0.4rem 0.5rem;
  padding-right: 1.1rem;
  cursor: pointer;
  transition: box-shadow 0.15s, opacity 0.15s;
  flex-shrink: 0;
  width: 100%;
  min-width: 0;
  overflow: hidden;
  position: relative;
}

.course-card__eligible-mark {
  position: absolute;
  top: 0.2rem;
  right: 0.3rem;
  color: #e67e22;
  font-weight: 800;
  font-size: 1rem;
  line-height: 1;
  pointer-events: none;
  z-index: 1;
}

.course-card[data-category='major-prep'] {
  background: var(--color-prep);
}

.course-card[data-critical='true'] {
  border-width: 3px;
  border-color: var(--color-critical-border);
}

.course-card--core {
  background: var(--color-core);
  border: 2px solid #666;
  border-radius: 999px;
  text-align: center;
  padding: 0.6rem 0.5rem;
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-card--core .course-card__code {
  font-weight: 700;
  margin: 0;
}

.course-card--elective {
  font-style: italic;
}

.course-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.course-card.is-locked {
  opacity: 0.55;
}

.course-card.is-complete {
  background: var(--color-complete) !important;
  border-color: #28a745;
}

.course-card.is-selected {
  box-shadow: 0 0 0 3px var(--color-accent);
  background: var(--color-selected) !important;
  position: relative;
  z-index: 2;
}

.course-card.is-upstream {
  background: var(--color-upstream) !important;
  box-shadow: inset 0 0 0 2px #e6a800;
}

.course-card.is-downstream {
  background: var(--color-downstream) !important;
  box-shadow: inset 0 0 0 2px #c0392b;
}

.course-card__header {
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
}

.course-card__check {
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  width: 14px;
  height: 14px;
}

.course-card__code {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.25;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.course-card__title {
  margin: 0.2rem 0 0;
  font-size: 0.62rem;
  color: #444;
  line-height: 1.2;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.course-card__chips {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-top: 0.35rem;
}

.chip {
  display: block;
  font-size: 0.55rem;
  padding: 0.15rem 0.25rem;
  border-radius: 3px;
  background: #fff;
  text-align: center;
  line-height: 1.2;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.chip--prereq {
  border: 1px solid #333;
}

.chip--coreq {
  border: 1px dashed #333;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: calc(100vh - 5rem);
  overflow-y: auto;
}

.tech-electives-panel {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem 1rem;
}

.tech-electives-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
}

.tech-slots-hint {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  color: #555;
  line-height: 1.35;
}

.tech-electives-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 14rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.tech-elective-item__btn {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem 0.35rem;
  text-align: left;
  padding: 0.4rem 0.45rem;
  padding-right: 1.25rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  background: #fafafa;
  cursor: pointer;
  font-size: 0.72rem;
  position: relative;
}

.tech-elective-item__btn:hover:not(:disabled) {
  background: #f0f4f8;
  border-color: #aaa;
}

.tech-elective-item__btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.tech-elective-item.is-eligible .tech-elective-item__btn:not(:disabled) {
  border-color: #e67e22;
}

.tech-elective-item.is-assigned .tech-elective-item__btn {
  background: #eef6fc;
  border-color: var(--color-accent);
}

.tech-elective-item.is-selected .tech-elective-item__btn {
  box-shadow: 0 0 0 2px var(--color-accent);
}

.tech-elective-item.is-upstream .tech-elective-item__btn {
  background: var(--color-upstream);
}

.tech-elective-item.is-downstream .tech-elective-item__btn {
  background: var(--color-downstream);
}

.tech-elective-item__label {
  font-weight: 700;
  flex: 0 0 auto;
}

.tech-elective-item__title {
  flex: 1 1 100%;
  color: #555;
  font-size: 0.65rem;
  line-height: 1.2;
}

.tech-elective-item__badge {
  font-size: 0.6rem;
  color: var(--color-accent);
  font-weight: 600;
}

.tech-elective-item__star {
  position: absolute;
  top: 0.2rem;
  right: 0.35rem;
  color: #e67e22;
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1;
}

.course-card--empty-tech {
  border-style: dashed;
  opacity: 0.85;
}

.course-card--filled-tech {
  font-style: normal;
}

.course-card__clear {
  position: absolute;
  bottom: 0.2rem;
  right: 0.25rem;
  border: none;
  background: transparent;
  color: #888;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.1rem 0.25rem;
  z-index: 2;
}

.course-card__clear:hover {
  color: #c0392b;
}

.course-panel {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  min-height: 120px;
}

.panel-hint {
  margin: 0;
  font-size: 0.85rem;
  color: #666;
}

.panel-title {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
}

.panel-subtitle {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  color: #555;
}

.panel-status {
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.status-ok {
  color: #1e7e34;
}

.status-warn {
  color: #b45309;
}

.panel-list {
  margin: 0 0 0.75rem;
  padding-left: 1.1rem;
  font-size: 0.85rem;
}

.course-panel h3 {
  margin: 0.5rem 0 0.25rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #666;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-accent);
  cursor: pointer;
  font-size: inherit;
  text-decoration: underline;
}

.legend,
.core-table,
.grade-note {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem 1rem;
}

.legend h2,
.core-table h2,
.grade-note h2 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.legend ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8rem;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.swatch {
  width: 24px;
  height: 16px;
  border: 1px solid #999;
  border-radius: 3px;
  flex-shrink: 0;
}

.swatch-prep {
  background: var(--color-prep);
}

.swatch-required {
  background: var(--color-required);
}

.swatch-critical {
  background: #fff;
  border: 3px solid var(--color-critical-border);
}

.swatch-unlocks {
  background: var(--color-downstream);
  border: 2px solid #c0392b;
}

.swatch-complete {
  background: var(--color-complete);
  border: 1px solid #28a745;
}

.eligible-demo {
  color: #e67e22;
  font-weight: 800;
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.grade-asterisk-demo {
  font-weight: 800;
  font-size: 1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.swatch-core {
  border-radius: 999px;
  background: var(--color-core);
}

.chip-demo {
  width: 24px;
  height: 12px;
  background: #fff;
}

.chip-demo.chip-prereq {
  border: 1px solid #333;
}

.chip-demo.chip-coreq {
  border: 1px dashed #333;
}

.core-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.core-table th,
.core-table td {
  border: 1px solid #ddd;
  padding: 0.3rem 0.4rem;
  text-align: left;
}

.grade-note p {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
}

.error {
  color: #c00;
  padding: 1rem;
}