:root {
  --lrccd-navy: #354458;
  --lrccd-blue: #286090;
  --lrccd-gold: #ffd700;
  --lrccd-gold-deep: #b98a00;
  --page-bg: #eef1f4;
  --surface: #ffffff;
  --surface-soft: #f7f9fb;
  --text: #243041;
  --muted: #667085;
  --border: #d8dee6;
  --border-strong: #c4ccd6;
  --success-bg: #e6f3e8;
  --success-text: #21652c;
  --danger-bg: #f7e5e5;
  --danger-text: #8d2d2d;
  --warning-bg: #fff5cf;
  --warning-text: #705600;
  --indirect-bg: #f1f3f6;
  --shadow: 0 8px 24px rgba(31, 45, 61, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0 1rem;
  background: var(--page-bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.45;
}

button,
select,
textarea,
input {
  font: inherit;
}

.app-shell {
  width: min(100%, 1240px);
  margin: 1.25rem auto;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.25rem 1.5rem;
  color: #ffffff;
  background: var(--lrccd-navy);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.brand-mark-wrap {
  display: grid;
  place-items: center;
  flex: 0 0 64px;
  width: 64px;
  height: 64px;
  padding: 0.4rem;
  background: #ffffff;
  border: 2px solid var(--lrccd-gold);
  border-radius: 14px;
}

.brand-mark {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 9px;
}

.brand-copy {
  min-width: 0;
}

.eyebrow,
.section-kicker,
.card-kicker {
  margin: 0 0 0.2rem;
  color: var(--lrccd-gold-deep);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-header .eyebrow {
  color: var(--lrccd-gold);
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.18;
}

h1 {
  margin-bottom: 0.35rem;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
}

h2 {
  margin-bottom: 0.35rem;
  font-size: 1.45rem;
}

h3 {
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
}

.app-subtitle,
.privacy-note {
  margin-bottom: 0;
  color: #e7ebef;
}

.app-subtitle {
  max-width: 48rem;
  font-size: 0.95rem;
}

.header-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.65rem;
  flex: 0 0 min(22rem, 34%);
  text-align: right;
}

.build-badge {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.32rem 0.7rem;
  color: var(--lrccd-navy);
  background: var(--lrccd-gold);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
}

.privacy-note {
  font-size: 0.84rem;
}

.tabBar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.8rem 0;
  padding: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 3px 12px rgba(31, 45, 61, 0.04);
}

.tab-link {
  min-height: 2.6rem;
  padding: 0.55rem 0.9rem;
  color: var(--lrccd-navy);
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 8px 8px 4px 4px;
  cursor: pointer;
  font-weight: 700;
}

.tab-link:hover {
  background: #f2f5f8;
}

.tab-link.active {
  color: var(--lrccd-navy);
  background: #fff9dc;
  border-bottom-color: var(--lrccd-gold-deep);
}

.tab-link:focus-visible,
.buttonPrimary:focus-visible,
.buttonSecondary:focus-visible,
select:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: 3px solid var(--lrccd-gold);
  outline-offset: 2px;
}

main {
  color: var(--text);
}

main a {
  color: var(--lrccd-blue);
}

main a:hover {
  color: var(--lrccd-navy);
}

.tab-panel {
  display: none;
  margin-bottom: 1rem;
  padding: 1.25rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(31, 45, 61, 0.05);
}

.tab-panel.active {
  display: block;
}

.tab-panel article > :last-child {
  margin-bottom: 0;
}

.workflow-note {
  padding: 0.75rem 0.9rem;
  color: #4f4200;
  background: #fff9dc;
  border-left: 4px solid var(--lrccd-gold-deep);
  border-radius: 6px;
}

.workspace {
  margin-top: 1rem;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 0.75rem;
  padding: 0 0.2rem;
}

.section-heading p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.data-fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.data-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 2fr);
  gap: 0.9rem;
  align-items: start;
}

.data-card,
.options-card,
.action-bar,
.results-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.data-card {
  min-width: 0;
  padding: 1rem;
}

.card-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-title-row label {
  display: block;
}

.card-help,
.input-note,
.action-bar p {
  color: var(--muted);
}

.card-help {
  min-height: 2.6em;
  margin-bottom: 0.65rem;
  font-size: 0.9rem;
}

.input-note {
  margin: -0.25rem 0 0;
  font-size: 0.78rem;
}

textarea {
  display: block;
  width: 100%;
  min-height: 12rem;
  margin: 0 0 0.65rem;
  padding: 0.8rem;
  color: var(--text);
  background: #fbfcfd;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  resize: vertical;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.4;
}

textarea:focus {
  border-color: var(--lrccd-blue);
}

.card-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.75rem;
}

.prerequisite-shell {
  position: relative;
  min-width: 0;
}

.prerequisite-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.options-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: 0.9rem;
  padding: 0.9rem 1rem;
}

.option-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.option-control {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  min-width: 14rem;
  padding: 0.55rem 0.7rem;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.option-control input {
  margin-top: 0.2rem;
  accent-color: var(--lrccd-blue);
}

.option-control span {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.option-control small {
  color: var(--muted);
}

.tb_hidden {
  display: none;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 15rem;
  min-height: 1.8rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
}

.status-indicator.status-good {
  color: var(--success-text);
  background: var(--success-bg);
  border-color: #bbdec1;
}

.status-indicator.status-bad {
  color: var(--danger-text);
  background: var(--danger-bg);
  border-color: #e3bcbc;
}

.status-indicator.status-default {
  color: #4d5968;
  background: #edf0f3;
  border-color: #d7dde4;
}

#disableUntilRosterAccepted.disabled {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(238, 241, 244, 0.88);
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  backdrop-filter: blur(2px);
  pointer-events: all;
}

#overlayMessage {
  max-width: 22rem;
  padding: 0.8rem 1rem;
  color: var(--lrccd-navy);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 9px;
  box-shadow: 0 6px 18px rgba(31, 45, 61, 0.12);
  font-weight: 800;
  text-align: center;
}

.buttonPrimary,
.buttonSecondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.55rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
  transition:
    background-color 120ms ease,
    border-color 120ms ease,
    transform 120ms ease;
}

.buttonPrimary {
  color: #ffffff;
  background: var(--lrccd-blue);
  border: 1px solid var(--lrccd-blue);
}

.buttonPrimary:hover {
  background: var(--lrccd-navy);
  border-color: var(--lrccd-navy);
}

.buttonSecondary {
  color: var(--lrccd-navy);
  background: #ffffff;
  border: 1px solid var(--border-strong);
}

.buttonSecondary:hover {
  background: #f3f6f8;
  border-color: #aeb8c4;
}

.buttonPrimary:active,
.buttonSecondary:active {
  transform: translateY(1px);
}

.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.9rem;
  padding: 1rem 1.1rem;
}

.action-bar h3,
.action-bar p {
  margin-bottom: 0;
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: flex-end;
}

#tableContainer {
  display: none;
  width: 100%;
  margin-top: 1rem;
}

.results-card {
  padding: 1rem;
}

#output {
  color: var(--text);
  background: var(--surface);
}

.outputHeader {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.outputHeader h2,
.outputHeader p {
  margin-bottom: 0.2rem;
}

.result-eyebrow {
  margin-bottom: 0.2rem;
  color: var(--lrccd-gold-deep);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.result-count {
  flex: 0 0 auto;
  padding: 0.4rem 0.7rem;
  color: var(--lrccd-navy);
  background: #edf3f8;
  border: 1px solid #d6e0e9;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
}

.outputTable {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.merged-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: #ffffff;
}

.merged-table th,
.merged-table td {
  padding: 0.55rem 0.6rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.merged-table tr > :last-child {
  border-right: 0;
}

.merged-table tbody tr:last-child td {
  border-bottom: 0;
}

.merged-table th {
  color: #ffffff;
  background: var(--lrccd-navy);
  font-size: 0.82rem;
  text-align: center;
}

.merged-table th small {
  display: inline-block;
  margin-top: 0.15rem;
  color: #dce5ed;
  font-size: 0.75rem;
  font-weight: 600;
}

.merged-table .student-group-header {
  background: #40556f;
}

.merged-table .prerequisite-group-header {
  background: var(--lrccd-blue);
}

.merged-table .indirect-group-header {
  color: var(--lrccd-navy);
  background: #dfe5ec;
}

.merged-table .status-column-header {
  background: #40556f;
}

.merged-table td.center {
  text-align: center;
}

.merged-table td.left {
  text-align: left;
}

.checkmark {
  display: block;
  width: 100%;
  color: #176f2a;
  font-size: 1.05rem;
  font-weight: 900;
  text-align: center;
}

.not-complete {
  display: block;
  width: 100%;
  color: #667085;
  font-weight: 700;
  text-align: center;
}

.empty-results {
  margin: 0;
  padding: 1rem;
  color: var(--muted);
}

.no-courses-taken {
  background-color: #f2cece;
}

.all-courses-taken {
  background-color: #d8eadb;
}

.some-courses-taken .not-taken {
  background-color: #f2cece;
}

.some-courses-taken .taken {
  background-color: #d8eadb;
}

.student-info {
  background-color: #fff2b5;
}

.indirect-evidence {
  color: #566273;
  background-color: var(--indirect-bg) !important;
}

.indirect-evidence .checkmark {
  color: #68778a;
}

.status-cell {
  min-width: 11rem;
  font-size: 0.82rem;
  font-weight: 800;
}

.status-complete {
  color: var(--success-text);
  background: var(--success-bg) !important;
}

.status-missing {
  color: var(--danger-text);
  background: var(--danger-bg) !important;
}

.status-neutral {
  color: #566273;
  background: var(--indirect-bg) !important;
}

.download-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
}

.download-bar h3 {
  margin-bottom: 0;
}

.download-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

select {
  min-height: 2.55rem;
  padding: 0.45rem 2rem 0.45rem 0.7rem;
  color: var(--text);
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
}

.dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 1000;
  width: min(90vw, 42rem);
  max-height: 80vh;
  padding: 1.2rem;
  overflow-y: auto;
  color: var(--text);
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  box-shadow: 0 18px 50px rgba(31, 45, 61, 0.24);
  opacity: 0;
  transform: translate(-50%, -50%);
  animation: fade-in 0.18s forwards;
}

.dialog-message {
  margin-bottom: 1rem;
}

.dialog-button {
  min-height: 2.5rem;
  padding: 0.5rem 0.9rem;
  margin-right: 0.45rem;
  color: #ffffff;
  background: var(--lrccd-blue);
  border: 1px solid var(--lrccd-blue);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
}

.dialog-button:hover {
  background: var(--lrccd-navy);
  border-color: var(--lrccd-navy);
}

.dialog-button:focus-visible {
  outline: 3px solid var(--lrccd-gold);
  outline-offset: 2px;
}

@keyframes fade-in {
  to {
    opacity: 1;
  }
}

footer {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  color: #e8edf2;
  background: var(--lrccd-navy);
  border-radius: 12px;
  font-size: 0.83rem;
}

footer p {
  margin-bottom: 0.3rem;
}

footer a {
  color: var(--lrccd-gold);
}

footer a:hover {
  color: #ffffff;
}

.back-to-top {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-weight: 800;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.message-system-dialog {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@media (max-width: 980px) {
  .app-header {
    align-items: flex-start;
  }

  .header-meta {
    flex-basis: 18rem;
  }

  .data-grid {
    grid-template-columns: 1fr;
  }

  .prerequisite-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    padding: 0 0.55rem;
  }

  .app-shell {
    margin: 0.55rem auto;
  }

  .app-header,
  .action-bar,
  .download-bar,
  .options-card {
    align-items: stretch;
    flex-direction: column;
  }

  .header-meta {
    align-items: flex-start;
    flex: 0 0 auto;
    text-align: left;
  }

  .brand-mark-wrap {
    flex-basis: 54px;
    width: 54px;
    height: 54px;
  }

  .tabBar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .tab-link {
    width: 100%;
  }

  .prerequisite-grid {
    grid-template-columns: 1fr;
  }

  .option-list {
    flex-direction: column;
  }

  .option-control {
    min-width: 0;
  }

  .action-buttons,
  .download-controls {
    justify-content: stretch;
  }

  .action-buttons > *,
  .download-controls > * {
    flex: 1 1 10rem;
  }

  .card-title-row {
    flex-direction: column;
  }

  .status-indicator {
    max-width: 100%;
  }

  .outputHeader {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}