/* ============================================
   EDUCATION SERIES — Blueprint Journey
   ============================================ */

:root {
  --edu-inkwell: #1A1718;
  --edu-copper: #D85D23;
  --edu-evergreen: #677F71;
  --edu-ivory: #E0D6C7;
  --edu-ivory-light: #F5F0E8;
  --edu-white: #ffffff;
  --edu-gray: #6b6566;
  --edu-border: #d6cfc5;
}

/* Layout */
.edu {
  background-color: var(--edu-white);
}

.edu-container {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero */
.edu-hero {
  background-color: var(--edu-inkwell);
  padding: 60px 2rem 50px;
  text-align: center;
}

.edu-hero__inner {
  max-width: 640px;
  margin: 0 auto;
}

.edu-hero__badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--edu-copper);
  border: 1px solid var(--edu-copper);
  padding: 4px 12px;
  margin-bottom: 1.25rem;
}

.edu-hero h1 {
  color: var(--edu-white);
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.edu-hero h1 span {
  color: var(--edu-copper);
}

.edu-hero__sub {
  font-size: 1rem;
  font-weight: 300;
  color: var(--edu-ivory);
  line-height: 1.7;
}

/* Lesson Nav */
.edu-nav {
  background-color: var(--edu-white);
  border-bottom: 1px solid var(--edu-border);
  position: sticky;
  top: 64px;
  z-index: 50;
  padding: 0.75rem 2rem;
}

.edu-nav__inner {
  max-width: 740px;
  margin: 0 auto;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.edu-nav__link {
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--edu-gray);
  border: 2px solid var(--edu-border);
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.edu-nav__link:hover {
  border-color: var(--edu-copper);
  color: var(--edu-copper);
}

.edu-nav__link--active {
  background-color: var(--edu-copper);
  border-color: var(--edu-copper);
  color: var(--edu-white);
}

/* Lesson Sections */
.edu-lesson {
  padding: 4rem 2rem;
  border-bottom: 1px solid var(--edu-border);
}

.edu-lesson:nth-child(even) {
  background-color: var(--edu-ivory-light);
}

.edu-lesson__header {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.edu-lesson__number {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--edu-copper);
  opacity: 0.2;
  line-height: 1;
  flex-shrink: 0;
  min-width: 56px;
}

.edu-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--edu-copper);
  margin-bottom: 0.25rem;
}

.edu-lesson__header h2 {
  font-size: 1.75rem;
  line-height: 1.2;
}

/* Content blocks */
.edu-block {
  margin-bottom: 2rem;
}

.edu-block__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--edu-evergreen);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--edu-evergreen);
  display: inline-block;
}

/* Lesson text */
.edu-text {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--edu-gray);
}

.edu-text p {
  margin-bottom: 1rem;
}

.edu-text h3 {
  font-size: 1.125rem;
  color: var(--edu-inkwell);
  margin: 1.75rem 0 0.75rem;
}

.edu-text strong {
  color: var(--edu-inkwell);
  font-weight: 600;
}

.edu-text ul, .edu-text ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

.edu-text li {
  margin-bottom: 0.375rem;
}

.edu-text blockquote {
  border-left: 4px solid var(--edu-copper);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background-color: var(--edu-ivory-light);
  font-style: italic;
  color: var(--edu-inkwell);
}

/* NotebookLM Script */
.edu-script {
  background-color: var(--edu-inkwell);
  padding: 2rem;
  margin-bottom: 2rem;
  max-height: 400px;
  overflow-y: auto;
}

.edu-script__label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--edu-copper);
  margin-bottom: 1rem;
}

.edu-script pre {
  font-family: var(--font-family);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--edu-ivory);
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* Infographic grid */
.edu-infographics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.edu-infographics img {
  width: 100%;
  border: 1px solid var(--edu-border);
}

/* Key Takeaway */
.edu-takeaway {
  background-color: var(--edu-evergreen);
  padding: 1.5rem 2rem;
}

.edu-takeaway h4 {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0.5rem;
}

.edu-takeaway p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--edu-white);
  margin: 0;
}

/* Margin Health Monitor — visual meters */
.mhm-meter {
  margin: 1.25rem 0;
  border: 1px solid var(--edu-border);
  overflow: hidden;
}

.mhm-meter__row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--edu-gray);
  border-bottom: 1px solid var(--edu-border);
}

.mhm-meter__row:last-child {
  border-bottom: none;
}

.mhm-meter__dot {
  width: 12px;
  height: 12px;
  min-width: 12px;
  border-radius: 50%;
  margin-top: 5px;
}

.mhm-meter__row strong {
  color: var(--edu-inkwell);
}

/* Signal lights */
.mhm-signal {
  margin: 1.5rem 0;
}

.mhm-signal__row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.25rem;
  border-left: 4px solid transparent;
  margin-bottom: 0.75rem;
}

.mhm-signal__row--green {
  background-color: rgba(34, 197, 94, 0.06);
  border-left-color: #22c55e;
}

.mhm-signal__row--yellow {
  background-color: rgba(234, 179, 8, 0.06);
  border-left-color: #eab308;
}

.mhm-signal__row--red {
  background-color: rgba(239, 68, 68, 0.06);
  border-left-color: #ef4444;
}

.mhm-signal__light {
  width: 16px;
  height: 16px;
  min-width: 16px;
  border-radius: 50%;
  margin-top: 3px;
}

.mhm-signal__row--green .mhm-signal__light { background-color: #22c55e; }
.mhm-signal__row--yellow .mhm-signal__light { background-color: #eab308; }
.mhm-signal__row--red .mhm-signal__light { background-color: #ef4444; }

.mhm-signal__row strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--edu-inkwell);
  margin-bottom: 0.25rem;
}

.mhm-signal__row p {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--edu-gray);
  margin: 0;
}

/* Script toggle */
.edu-script-toggle {
  margin-bottom: 2rem;
}

.edu-script-toggle summary::-webkit-details-marker {
  display: none;
}

.edu-script-toggle[open] .edu-script {
  margin-top: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .edu-hero h1 { font-size: 1.75rem; }
  .edu-lesson__header { flex-direction: column; gap: 0.5rem; }
  .edu-lesson__number { font-size: 1.75rem; min-width: auto; }
.edu-container { padding: 0 1.25rem; }
}