:root {
  --blue: #1f5eff;
  --blue-dark: #123ea6;
  --ink: #1a1d29;
  --ink-soft: #4b5166;
  --bg: #f5f7fb;
  --card: #ffffff;
  --border: #e2e6f0;
  --green: #1f9d55;
  --red: #d13b3b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

#sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--card);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 0 20px 20px;
  font-weight: 700;
  font-size: 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.sidebar-module {
  padding: 16px 20px 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.sidebar-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 20px;
  border: none;
  background: none;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.sidebar-item:hover {
  background: var(--bg);
}

.sidebar-item-active {
  border-left-color: var(--blue);
  background: var(--bg);
  font-weight: 600;
  color: var(--blue-dark);
}

#main {
  flex: 1;
  padding: 48px 64px;
  max-width: 820px;
  overflow-y: auto;
}

.kicker {
  color: var(--blue-dark);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 8px;
}

h1 {
  font-size: 32px;
  margin: 0 0 20px;
}

h2 {
  font-size: 20px;
  margin: 24px 0 16px;
}

p {
  line-height: 1.6;
  color: var(--ink-soft);
  font-size: 16px;
}

code {
  background: #eef1fa;
  color: var(--blue-dark);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

/* desired vs observed state */
.states-diagram {
  display: flex;
  gap: 16px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.state-box {
  flex: 1;
  min-width: 220px;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.state-box strong {
  color: var(--ink);
  font-size: 14px;
}

.state-box span {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.4;
}

/* control loop diagram */
.loop-diagram {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 4px;
  flex-wrap: wrap;
}

.loop-box {
  background: var(--blue);
  color: white;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 700;
}

.loop-arrow {
  font-size: 22px;
  color: var(--ink-soft);
}

.loop-repeat {
  font-size: 13px;
  color: var(--ink-soft);
  font-style: italic;
  margin-top: 6px;
}

/* fields table */
.fields-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.fields-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: 15px;
  color: var(--ink-soft);
}

.fields-table td:first-child {
  width: 260px;
}

/* Azure vs self-hosted comparison cards */
.compare-layout {
  display: flex;
  gap: 20px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.compare-card {
  flex: 1;
  min-width: 260px;
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 4px solid var(--blue);
  border-radius: 10px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.compare-card strong {
  color: var(--blue-dark);
  font-size: 14px;
}

.compare-card span {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.5;
}

.compare-note {
  font-style: italic;
  font-size: 14px;
}

/* infra summary table (Module 6 map) */
.infra-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 28px;
}

.infra-table th,
.infra-table td {
  padding: 10px 12px;
  border: 1px solid var(--border);
  font-size: 14px;
  text-align: left;
  color: var(--ink-soft);
}

.infra-table th {
  background: var(--bg);
  color: var(--ink);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.phase-tracker-compact .phase-row {
  padding: 10px 20px;
}

/* CR builder */
.builder-layout {
  display: flex;
  gap: 32px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.builder-form {
  flex: 1;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--ink);
}

.field input[type="text"],
.field select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

.field-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-direction: row;
}

.yaml-preview,
.code-block {
  flex: 1;
  min-width: 320px;
  background: #10131f;
  color: #d6e0ff;
  padding: 20px;
  border-radius: 10px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  align-self: flex-start;
}

.code-block {
  margin-top: 20px;
  width: 100%;
}

/* phase tracker */
.phase-tracker {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.phase-row {
  display: flex;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  align-items: baseline;
}

.phase-name {
  font-weight: 700;
  color: var(--blue-dark);
  width: 140px;
  flex-shrink: 0;
}

.phase-caption {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.5;
}

.phase-note {
  font-size: 13px;
  font-style: italic;
  margin-top: 12px;
}

.phase-hint {
  font-size: 13px;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: -8px;
}

/* interactive reconcile-loop diagram */
.reconcile-diagram {
  margin-top: 16px;
}

.reconcile-flow {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.reconcile-node {
  background: var(--card);
  border: 2px solid var(--border);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 18px;
  border-radius: 10px;
  cursor: pointer;
}

.reconcile-node:hover {
  border-color: var(--blue);
}

.reconcile-node-active {
  border-color: var(--blue);
  background: #eef1fa;
  color: var(--blue-dark);
}

.reconcile-node-skipped {
  opacity: 0.5;
  font-style: italic;
}

.reconcile-node-degraded {
  border-color: var(--red);
  color: var(--red);
}

.reconcile-node-degraded.reconcile-node-active {
  background: #fdeeee;
  border-color: var(--red);
}

.reconcile-degraded-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0;
}

.reconcile-degraded-label {
  font-size: 13px;
  font-style: italic;
  color: var(--ink-soft);
}

.reconcile-detail {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-top: 8px;
}

.reconcile-detail h3 {
  margin: 0 0 10px;
  color: var(--blue-dark);
}

.reconcile-detail p {
  margin: 8px 0;
}

.phase-detail-success {
  color: var(--green);
  font-size: 14px;
}

.phase-detail-failure {
  color: var(--red);
  font-size: 14px;
}

.phase-detail-special,
.phase-detail-reprocess {
  font-style: italic;
  font-size: 14px;
}

/* quiz */
.quiz-question {
  margin-bottom: 24px;
}

.quiz-question-text {
  font-weight: 600;
  color: var(--ink);
  font-size: 16px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--ink-soft);
}

.quiz-correct {
  border-color: var(--green);
  background: #edf9f1;
}

.quiz-incorrect {
  border-color: var(--red);
  background: #fdeeee;
}

.quiz-feedback {
  margin-top: 8px;
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 8px;
}

.quiz-feedback-correct {
  background: #edf9f1;
  color: var(--green);
}

.quiz-feedback-incorrect {
  background: #fdeeee;
  color: var(--red);
}

.quiz-score {
  font-weight: 700;
  margin-top: 16px;
}

/* badge */
.badge-card {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  margin-bottom: 24px;
}

.badge-medal {
  font-size: 56px;
}

.badge-dns {
  font-family: monospace;
  font-size: 18px;
  color: var(--blue-dark);
  margin-top: 8px;
}

.badge-status {
  color: var(--green);
  font-weight: 700;
}

/* nav + buttons */
.step-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--ink);
}

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
  margin-left: auto;
}

.btn:hover {
  opacity: 0.9;
}

/* glossary */
.glossary-list {
  margin: 24px 0 0;
}

.glossary-term {
  font-weight: 700;
  color: var(--blue-dark);
  font-size: 15px;
  margin-top: 20px;
}

.glossary-def {
  margin: 6px 0 0;
  padding-left: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
  border-left: 3px solid var(--border);
  padding-left: 14px;
}

.glossary-def cite {
  display: block;
  font-style: normal;
  font-size: 12px;
  color: var(--ink-soft);
  opacity: 0.8;
  margin-top: 4px;
}

.glossary-def cite a {
  color: var(--blue-dark);
}

/* verification checklist */
.verify-checklist {
  margin: 8px 0 0;
  padding-left: 22px;
}

.verify-checklist li {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 8px;
}

/* installation checklist (Module 8) */
.checklist-progress-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 20px 0;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.checklist-progress {
  font-weight: 700;
  color: var(--blue-dark);
  font-size: 15px;
}

.checklist-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
}

.checklist-item:hover {
  background: var(--bg);
}

.checklist-item input {
  margin-top: 3px;
  flex-shrink: 0;
}