:root {
  color-scheme: light;
  --ink: #20242c;
  --muted: #586170;
  --line: #d6deea;
  --paper: #f7f9fc;
  --panel: #ffffff;
  --blue: #2563a9;
  --teal: #0f766e;
  --orange: #b66f00;
  --shadow: 0 12px 30px rgba(34, 43, 63, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
}

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

.course-home {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  min-width: 0;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 204px;
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
  padding: clamp(54px, 9vw, 98px) 0 36px;
}

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

.portal-admin-link {
  position: absolute;
  top: clamp(40px, 7vw, 72px);
  right: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 11px;
  background: #fff;
  color: var(--ink);
  font-weight: 850;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.portal-admin-link:hover,
.portal-admin-link:focus {
  border-color: var(--blue);
  outline: none;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 880px;
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 7vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(1.45rem, 3vw, 2.5rem);
  line-height: 1.08;
}

h3 {
  margin: 0 0 12px;
  font-size: 1.35rem;
  line-height: 1.14;
}

.hero p:not(.eyebrow) {
  max-width: 780px;
  color: #394354;
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
}

.course-qr {
  display: grid;
  gap: 8px;
  justify-items: center;
  justify-self: end;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
}

.course-qr img {
  display: block;
  width: 204px;
  height: 204px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: #fff;
}

.course-qr:hover img,
.course-qr:focus img {
  border-color: var(--blue);
}

.course-qr:focus {
  outline: none;
}

section {
  padding: 34px 0 52px;
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 18px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.chapter-card {
  display: block;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
  color: var(--ink);
  text-decoration: none;
}

.chapter-card:hover,
.chapter-card:focus {
  border-color: var(--blue);
  outline: none;
}

.chapter-card span {
  display: inline-block;
  margin-bottom: 12px;
  border: 1px solid #c8d4e4;
  border-radius: 8px;
  padding: 5px 8px;
  background: #f8fbff;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 850;
}

.chapter-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.24rem;
  line-height: 1.16;
}

.chapter-card p {
  margin: 0;
  color: var(--muted);
}

.chapter-card.compact {
  min-height: 180px;
}

.chapter-card.utility span {
  border-color: #c8dedb;
  background: #eef8f6;
  color: var(--teal);
}

.chapter-card.muted {
  background: #f9fbfe;
  box-shadow: none;
}

.chapter-card.muted span {
  border-color: #ead7b7;
  background: #fff7e8;
  color: var(--orange);
}

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(460px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-card h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 7vw, 3.2rem);
  line-height: 1;
}

.auth-card form {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.auth-card label {
  color: var(--muted);
  font-weight: 850;
}

.auth-card input {
  width: 100%;
  border: 1px solid #becadd;
  border-radius: 8px;
  padding: 12px 14px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.report-button {
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  background: var(--blue);
  color: #fff;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

.report-button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.auth-error {
  margin: 0;
  color: #a12626;
  font-weight: 800;
}

.aside-note {
  color: var(--muted);
  font-size: 0.93rem;
}

.report-home {
  padding-bottom: 48px;
}

.report-hero {
  padding-bottom: 22px;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.resource-links a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.stat-grid strong {
  display: block;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1;
}

.stat-grid span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 800;
}

.table-wrap {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid #e4ebf4;
  padding: 11px 13px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f5f8fc;
  color: #344158;
  font-size: 0.84rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

.report-alert {
  border: 1px solid #f0c9c9;
  border-radius: 8px;
  padding: 18px;
  background: #fff5f5;
}

.grading-criteria,
.grading-console {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.grading-criteria {
  display: grid;
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.grading-criteria div {
  display: grid;
  grid-template-columns: 220px 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 16px;
  border-bottom: 1px solid #e4ebf4;
}

.grading-criteria div:last-child {
  border-bottom: 0;
}

.grading-criteria strong {
  font-size: 1rem;
  line-height: 1.25;
}

.grading-criteria span {
  justify-self: start;
  border: 1px solid #c8dedb;
  border-radius: 8px;
  padding: 3px 8px;
  background: #eef8f6;
  color: var(--teal);
  font-weight: 850;
}

.grading-criteria p {
  margin: 0;
  color: var(--muted);
}

.grading-rounding {
  margin: 12px 0 0;
  border-left: 4px solid var(--blue);
  padding: 8px 12px;
  background: #f3f7fc;
  font-weight: 800;
}

.grading-console {
  margin-top: 20px;
  min-width: 0;
}

.console-head {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 18px;
}

.workflow-settings {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.workflow-settings label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 850;
}

.workflow-settings input {
  width: 100%;
  border: 1px solid #c7d2e3;
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.file-slot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.file-slot {
  display: grid;
  gap: 8px;
  min-height: 122px;
  border: 1px dashed #a9bdd8;
  border-radius: 8px;
  padding: 12px;
  background: #f8fbff;
  color: var(--ink);
}

.file-slot span {
  font-weight: 850;
  line-height: 1.2;
}

.file-slot em {
  align-self: end;
  color: var(--muted);
  font-size: 0.82rem;
  font-style: normal;
  font-weight: 800;
}

.file-slot.ready {
  border-style: solid;
  border-color: #8bc2bb;
  background: #f1fbf9;
}

.file-slot.ready em {
  color: var(--teal);
}

.file-slot.optional {
  background: #fbfcfe;
}

.file-slot input {
  width: 100%;
  font-size: 0.82rem;
}

.workflow-status {
  display: grid;
  gap: 4px;
  margin: 12px 0;
  border: 1px solid #dce4ef;
  border-radius: 8px;
  padding: 12px;
  background: #fff;
}

.workflow-status span {
  color: var(--muted);
}

.workflow-steps {
  display: grid;
  gap: 8px;
  margin: 14px 0 18px;
}

.workflow-steps label {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid #e1e8f2;
  border-radius: 8px;
  padding: 10px;
  background: #fff;
}

.workflow-steps input {
  margin-top: 5px;
}

.browser-runner {
  display: grid;
  gap: 12px;
  margin: 14px 0 18px;
  border: 1px solid #c8dedb;
  border-radius: 8px;
  padding: 16px;
  background: #f1fbf9;
}

.browser-runner h3 {
  margin-bottom: 6px;
}

.runner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.runner-status {
  margin: 0;
  border-left: 4px solid var(--teal);
  padding: 8px 12px;
  background: #ffffff;
  color: var(--muted);
  font-weight: 800;
}

.runner-status.ready {
  color: var(--teal);
}

.runner-status.error {
  border-color: #b42318;
  color: #9a3412;
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
  min-width: 0;
}

.command-grid article {
  min-width: 0;
  border: 1px solid #dce4ef;
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfe;
}

.command-box {
  max-width: 100%;
  overflow-x: auto;
  margin: 10px 0;
  border: 1px solid #bfd2ed;
  border-radius: 8px;
  padding: 12px;
  background: #f3f7fc;
  color: #172338;
  font-size: 0.88rem;
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.mini-stats span {
  display: block;
  border: 1px solid #dce4ef;
  border-radius: 8px;
  padding: 12px;
  background: #f8fbff;
  color: var(--muted);
  font-weight: 800;
}

.mini-stats strong {
  display: block;
  color: var(--ink);
  font-size: 1.55rem;
  line-height: 1.05;
}

.grade-bars {
  display: grid;
  gap: 9px;
  margin: 18px 0;
}

.grade-bar {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 42px;
  gap: 10px;
  align-items: center;
}

.grade-bar-fill {
  height: 24px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--blue), var(--teal));
}

.grading-table-wrap table {
  min-width: 980px;
}

.flag-text {
  color: #9a3412;
  font-weight: 750;
}

@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .grading-criteria div,
  .workflow-settings,
  .command-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 620px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .portal-admin-link {
    position: static;
    display: inline-block;
    justify-self: start;
    margin-bottom: 18px;
  }

  .course-qr {
    justify-self: start;
  }

  .course-qr img {
    width: 168px;
    height: 168px;
  }

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

  .chapter-card {
    min-height: auto;
  }

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

  .console-head {
    display: grid;
  }

  .file-slot-grid {
    grid-template-columns: 1fr;
  }

  .mini-stats {
    grid-template-columns: 1fr;
  }
}