:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --panel: #ffffff;
  --ink: #18212a;
  --muted: #657383;
  --line: #dce3e8;
  --blue: #2185c8;
  --green: #0e9441;
  --red: #c2410c;
  --amber: #b7791f;
  --soft-blue: #eaf5fb;
  --soft-green: #e9f7ef;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

button {
  font: inherit;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #fff;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
  border-radius: 8px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 20px;
  line-height: 1.2;
}

h2 {
  font-size: 28px;
  line-height: 1.15;
}

h3 {
  font-size: 19px;
  line-height: 1.25;
}

.progress-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfdfe;
}

.progress-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  color: var(--muted);
}

.progress-track {
  height: 10px;
  background: #e8eef2;
  border-radius: 999px;
  overflow: hidden;
}

.progress-track div {
  height: 100%;
  width: 0;
  background: var(--green);
  transition: width 0.2s ease;
}

.module-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: auto;
}

.nav-item {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
  min-height: 62px;
}

.nav-item:hover,
.nav-item.active {
  border-color: var(--blue);
  background: var(--soft-blue);
}

.nav-item.done {
  border-color: #b7e1c7;
}

.nav-title {
  display: block;
  font-weight: 750;
  line-height: 1.25;
}

.nav-meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.course {
  min-width: 0;
  padding: 26px 34px 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 22px;
}

.top-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.icon-button,
.primary-button,
.secondary-button {
  border-radius: 8px;
  border: 1px solid var(--line);
  min-height: 42px;
  cursor: pointer;
  background: #fff;
}

.icon-button {
  width: 42px;
  font-size: 22px;
}

.primary-button {
  padding: 0 18px;
  background: var(--green);
  color: #fff;
  border-color: var(--green);
  font-weight: 750;
}

.secondary-button {
  padding: 0 16px;
  color: var(--ink);
  font-weight: 700;
}

.lesson-panel,
.quiz-panel,
.modal-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.lesson-panel {
  padding: 24px;
}

.lesson-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 20px;
}

.lesson-copy p {
  margin: 12px 0 0;
  color: #354452;
  line-height: 1.55;
}

.check-list,
.scenario-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.scenario-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfdfe;
}

.check-list li::before {
  content: "✓";
  color: var(--green);
  font-weight: 900;
  margin-right: 8px;
}

.scenario-card strong {
  display: block;
  margin-bottom: 6px;
}

.note-box {
  background: var(--soft-green);
  border: 1px solid #c6e9d1;
  border-radius: 8px;
  padding: 16px;
  line-height: 1.5;
}

.quiz-panel {
  margin-top: 18px;
  padding: 20px;
}

.question {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-top: 16px;
}

.question:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.answers {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.answer {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.answer:hover {
  background: var(--soft-blue);
}

.result {
  margin-top: 16px;
  padding: 14px;
  border-radius: 8px;
  font-weight: 750;
}

.result.pass {
  background: var(--soft-green);
  color: #0a6d31;
}

.result.fail {
  background: #fff3ed;
  color: var(--red);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 18, 25, 0.48);
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal.hidden {
  display: none;
}

.modal-card {
  width: min(980px, 100%);
  max-height: min(88vh, 920px);
  overflow: auto;
  padding: 22px;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
  margin-bottom: 16px;
}

.exam-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}

.registration-gate {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(245, 247, 248, 0.94);
  display: grid;
  place-items: center;
  padding: 20px;
}

.registration-card {
  width: min(520px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 20px 70px rgba(25, 38, 52, 0.18);
}

.registration-card p {
  line-height: 1.5;
  color: #354452;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 14px 0 18px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f4f7f9;
}

.auth-tab {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-weight: 800;
  color: var(--muted);
}

.auth-tab.active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 6px rgba(25, 38, 52, 0.12);
}

.registration-card label {
  display: grid;
  gap: 6px;
  margin: 14px 0;
  font-weight: 700;
}

.registration-card input {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  font: inherit;
}

.registration-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
}

.registration-actions .primary-button,
.registration-actions .secondary-button {
  flex: 1;
}

.form-error {
  min-height: 22px;
  color: var(--red);
  font-weight: 700;
}

.student-badge {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learning-extras {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.7fr);
  gap: 14px;
  margin-top: 18px;
}

.detail-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fbfdfe;
}

.detail-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  line-height: 1.5;
}

.support-menu {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.support-group {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.support-group summary {
  cursor: pointer;
  font-weight: 800;
  padding: 10px 12px;
}

.support-group div {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
  padding: 10px;
}

.support-group a {
  color: var(--blue);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.35;
}

.support-group a:hover {
  text-decoration: underline;
}

.mango-cases {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 18px;
  line-height: 1.45;
}

.reference-title {
  margin-top: 18px;
}

.reference-links {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.reference-links a {
  display: grid;
  gap: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
  text-decoration: none;
  background: #fff;
}

.reference-links a:hover {
  border-color: var(--blue);
  background: var(--soft-blue);
}

.reference-links span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.results-table {
  overflow: auto;
  margin-top: 18px;
}

.results-table:first-child {
  margin-top: 0;
}

.results-table h3 {
  margin-bottom: 10px;
}

.results-table table {
  width: 100%;
  border-collapse: collapse;
}

.results-table th,
.results-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  overflow-wrap: anywhere;
  vertical-align: top;
}

.learning-toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) minmax(170px, 0.8fr) minmax(190px, 1fr);
  gap: 12px;
  align-items: end;
  margin-top: 18px;
}

.learning-toolbar label {
  display: grid;
  gap: 6px;
  color: #2d3b48;
  font-weight: 750;
}

.learning-toolbar input,
.learning-toolbar select {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  font: inherit;
}

.accordion-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.accordion-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.accordion-item[open] {
  border-color: #b9d7eb;
}

.accordion-item summary {
  list-style: none;
  cursor: pointer;
  padding: 12px;
}

.accordion-item summary::-webkit-details-marker {
  display: none;
}

.accordion-summary {
  display: grid;
  grid-template-columns: minmax(190px, 1.4fr) minmax(150px, 1fr) minmax(120px, 0.7fr) minmax(160px, 1fr) 22px;
  gap: 12px;
  align-items: center;
}

.accordion-summary.candidate-result-summary {
  grid-template-columns: 54px minmax(190px, 1.4fr) minmax(150px, 1fr) minmax(120px, 0.7fr) minmax(160px, 1fr) 22px;
}

.candidate-photo,
.candidate-photo-button {
  width: 54px;
  height: 54px;
  border-radius: 8px;
}

.candidate-photo {
  display: block;
  object-fit: cover;
  background: #eef3f6;
}

.candidate-photo-button {
  border: 0;
  padding: 0;
  background: transparent;
  cursor: zoom-in;
}

.candidate-photo.placeholder {
  display: grid;
  place-items: center;
  color: var(--blue);
  font-weight: 900;
}

.accordion-summary::after {
  content: "+";
  justify-self: end;
  color: var(--blue);
  font-size: 22px;
  font-weight: 900;
}

.accordion-item[open] .accordion-summary::after {
  content: "−";
}

.summary-main,
.summary-cell,
.summary-status {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.summary-main strong,
.summary-cell strong,
.summary-status strong {
  overflow-wrap: anywhere;
}

.summary-main span,
.summary-cell span,
.summary-status span {
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.summary-status {
  border-left: 4px solid var(--line);
  padding-left: 10px;
}

.summary-status.strong {
  border-color: var(--green);
}

.summary-status.good {
  border-color: var(--blue);
}

.summary-status.reserve {
  border-color: var(--amber);
}

.summary-status.weak {
  border-color: var(--red);
}

.accordion-details {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding: 16px;
  background: #fbfdfe;
}

.accordion-details dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.accordion-details dl div,
.text-block {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 10px;
}

.accordion-details dt,
.text-block span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.accordion-details dd,
.text-block p {
  margin: 0;
  overflow-wrap: anywhere;
}

.progress-line {
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: #e8eef2;
}

.progress-line span {
  display: block;
  height: 100%;
  background: var(--green);
}

.empty {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-weight: 800;
}

.mini-button {
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft-green);
  color: #0a6d31;
  cursor: pointer;
  font-weight: 750;
  margin: 2px;
  padding: 0 10px;
}

.mini-button.danger {
  background: #fff3ed;
  color: var(--red);
}

.metric {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfdfe;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
}

.director-page {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 44px;
}

.director-header,
.section-title {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.director-header {
  margin-bottom: 22px;
}

.director-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.director-actions a {
  display: inline-grid;
  place-items: center;
  text-decoration: none;
}

.director-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.director-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 20px;
  margin-top: 18px;
}

.director-status {
  min-height: 22px;
  margin-top: 14px;
  color: var(--muted);
  font-weight: 700;
}

.director-status.ok {
  color: var(--green);
}

.director-status.error {
  color: var(--red);
}

.photo-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(9, 15, 21, 0.76);
}

.photo-modal.hidden {
  display: none;
}

.photo-modal img {
  max-width: min(92vw, 900px);
  max-height: 88vh;
  border-radius: 8px;
  object-fit: contain;
  background: #fff;
}

.photo-modal-close {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.results-table small {
  color: var(--muted);
  font-size: 12px;
}

.row-actions {
  min-width: 190px;
}

.row-actions .mini-button {
  width: 100%;
}

.interview-photo {
  width: 54px;
  height: 54px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #f2f5f6;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .course {
    padding: 20px;
  }

  .lesson-grid,
  .exam-summary,
  .learning-extras,
  .director-summary,
  .learning-toolbar,
  .accordion-summary,
  .accordion-details dl {
    grid-template-columns: 1fr;
  }

  .accordion-summary {
    position: relative;
    padding-right: 26px;
  }

  .accordion-summary::after {
    position: absolute;
    top: 4px;
    right: 0;
  }

  .summary-status {
    border-left: 0;
    border-top: 4px solid var(--line);
    padding-left: 0;
    padding-top: 8px;
  }
}

@media (max-width: 560px) {
  .module-nav {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .director-header,
  .section-title {
    align-items: stretch;
    flex-direction: column;
  }

  .director-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .registration-actions {
    align-items: stretch;
    flex-direction: column;
  }

  h2 {
    font-size: 24px;
  }
}