.lesson-library-intro {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 22px 25px;
  border: 1px solid #dce3d8;
  border-radius: 10px;
  background: linear-gradient(110deg, #f0f4eb, #f0f4eb);
  margin: 28px 0;
}
.lesson-library-intro > span {
  width: 44px;
  height: 44px;
  display: grid;
  place-content: center;
  flex-shrink: 0;
  border: 1px solid #a8bca8;
  border-radius: 10px;
  color: #286c2b;
  background: #e7eee2;
}
.lesson-library-intro h2 {
  font-size: 21px;
  margin: 0 0 6px;
}
.lesson-library-intro p {
  font-size: 13px;
  margin: 0;
  color: #607366;
  line-height: 1.8;
}
.lesson-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}
.lesson-card {
  display: flex;
  flex-direction: column;
  border: 1px solid #dce3d8;
  border-radius: 11px;
  background:
    radial-gradient(ellipse at 0 0, #e7eee237, transparent 65%), #f0f4eb;
  padding: 27px;
  min-width: 0;
}
.lesson-card:hover {
  border-color: #a8bca8;
  background: #f0f4eb;
  transform: translateY(-3px);
}
.lesson-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  margin-bottom: 18px;
}
.lesson-card-top > span:first-child {
  display: flex;
  align-items: center;
  gap: 7px;
  font: 10px var(--mono);
  letter-spacing: 0.06em;
  color: #2f6538;
}
.lesson-card-top .icon {
  width: 17px;
  height: 17px;
}
.lesson-card-complete {
  font: 10px var(--mono);
  color: #286c2e;
}
.lesson-card h3 {
  font-size: 25px;
  line-height: 1.25;
  margin: 0 0 12px;
}
.lesson-card > p {
  font-size: 13px;
  line-height: 1.9;
  color: #607366;
  flex: 1;
  margin: 0 0 23px;
}
.lesson-card-footer {
  display: flex;
  gap: 15px;
  align-items: center;
  padding-top: 17px;
  border-top: 1px solid #dce3d8;
  font-size: 11px;
  color: #607366;
}
.lesson-card-footer > b {
  margin-left: auto;
  color: #193a2c;
  font-weight: 500;
  white-space: nowrap;
}
.lesson-card-footer .icon {
  width: 14px;
  height: 14px;
}
.reading-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 30px;
  margin-top: 32px;
}
.reading-toc {
  position: sticky;
  top: 24px;
  align-self: start;
  padding: 12px 20px 15px;
  border-left: 2px solid #a8bca8;
}
.reading-toc ol {
  padding-left: 18px;
  margin: 20px 0;
}
.reading-toc li {
  font-size: 12px;
  padding: 7px 0;
  color: #607366;
  line-height: 1.8;
}
.reading-toc li a:hover {
  color: #193a2c;
}
.reading-toc > a {
  font-size: 12px;
  color: #2f6539;
}
.reading-toc #reading-save-status {
  font-size: 11px;
  line-height: 1.8;
  color: #6c4628;
}
.reading-score {
  margin-top: 25px;
}
.reading-score progress {
  display: block;
  height: 5px;
}
.reading-score span {
  display: block;
  font: 10px var(--mono);
  color: #33613d;
  margin-top: 10px;
}
.reading-content {
  min-width: 0;
  max-width: 970px;
}
.reading-chapter,
.reading-experiment,
.reading-finish {
  margin-top: 22px;
  padding: 32px;
}
.reading-objectives {
  padding: 32px;
  background: linear-gradient(125deg, #f0f4eb, #f0f4eb);
}
.reading-content .tag {
  font-size: 10px;
  letter-spacing: 0.1em;
}
.reading-content h2 {
  font-size: 30px;
  line-height: 1.25;
  margin: 12px 0 21px;
}
.reading-content p,
.reading-content li {
  font-size: 14px;
  line-height: 2;
  color: #607366;
}
.reading-objectives > p {
  font-size: 12px;
  margin: 20px 0 0;
  color: #607366;
}
.reading-content ul {
  padding-left: 20px;
}
.reading-content li {
  margin: 7px 0;
}
.reading-content p strong {
  color: #193a2c;
  font-weight: 550;
}
.reading-content code {
  color: #2e663e;
  background: #f0f4eb77;
  border-radius: 3px;
  padding: 1px 4px;
  font-size: 0.88em;
  overflow-wrap: anywhere;
}
.reading-content pre {
  font-size: 12px;
  line-height: 1.9;
  margin: 20px 0;
}
.reading-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
}
.reading-content th,
.reading-content td {
  text-align: left;
  vertical-align: top;
  padding: 12px 10px;
  border-bottom: 1px solid #dce3d8;
  font-size: 12px;
  line-height: 1.9;
}
.reading-content th {
  color: #31633e;
  font-weight: 550;
}
.reading-content td {
  color: #607366;
}
.reading-callout {
  padding: 18px 20px;
  border-left: 3px solid #a8bca8;
  background: #f0f4eb80;
  border-radius: 0 8px 8px 0;
  margin: 22px 0;
}
.reading-callout > strong {
  color: #193a2c;
  font-size: 13px;
}
.reading-callout p {
  font-size: 13px;
  margin: 6px 0 0;
}
.reading-check {
  background: #fbfcf8;
  border: 1px solid #dce3d8;
  border-radius: 9px;
  padding: 22px;
  margin-top: 27px;
}
.reading-check fieldset {
  border: 0;
  padding: 0;
  margin: 0 0 17px;
}
.reading-check legend {
  font-size: 14px;
  font-weight: 550;
  color: #193a2c;
  line-height: 1.9;
  margin-bottom: 11px;
}
.reading-check .choice {
  font-size: 13px;
  line-height: 1.8;
  gap: 10px;
  padding: 4px 0;
  color: #607366;
}
.reading-check .choice input {
  width: auto;
  accent-color: #b0efb8;
  min-height: 15px;
}
.reading-content .status {
  font-size: 12px;
  color: #2d673a;
  margin-top: 15px;
  line-height: 1.9;
}
.reading-finish p {
  font-size: 13px;
}
.reading-next {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 25px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid #dce3d8;
  font-size: 13px;
}
.reading-next > a {
  color: #193a2c;
}
.reading-next > div {
  display: grid;
  gap: 5px;
  text-align: right;
}
.reading-next span {
  font-size: 10px;
  color: #607366;
}
.reading-next > div > a {
  color: #385c45;
  font-size: 12px;
}
.reading-experiment {
  border-color: #a8bca8;
  background:
    radial-gradient(ellipse at 100% 0, #e7eee22e, transparent 70%), #f0f4eb;
}
.reading-experiment h2 {
  margin-bottom: 22px;
}
.reading-experiment label {
  font-size: 12px;
  color: #385c43;
  margin: 15px 0 8px;
}
.reading-experiment select {
  max-width: 100%;
  width: 100%;
  font-size: 12px;
  margin: 5px 0 15px;
  min-height: 40px;
}
.reading-experiment button {
  font-size: 12px;
}
.reading-experiment button:disabled {
  opacity: 0.6;
}
.demo-mission {
  border: 1px solid #a8bca8;
  background: #f0f4eb;
  padding: 15px 18px;
  border-radius: 8px;
  font-size: 13px !important;
  line-height: 1.9 !important;
  color: #346041 !important;
  margin: 0 0 24px;
}
.demo-mission b {
  color: #193a2c;
}
.demo-button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0;
}
.demo-button-row button[aria-pressed="true"] {
  border-color: #a8bca8;
  color: #193a2c;
  background: #e7eee2;
}
.demo-output {
  margin: 22px 0 0;
  border: 1px solid #a8bca8;
  border-radius: 8px;
  background: #fbfcf8;
  padding: 20px;
  font: 12px/1.9 var(--mono);
  color: #346040;
  overflow-wrap: anywhere;
}
.demo-output p {
  font-size: 12px;
  margin: 12px 0 0;
  line-height: 1.9;
}
.journey-nodes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 23px;
}
.journey-nodes > div {
  border: 1px solid #dce3d8;
  border-radius: 7px;
  padding: 15px 10px;
  background: #f0f4eb;
  position: relative;
  transition:
    background 0.25s,
    border-color 0.25s;
}
.journey-nodes > div > span {
  display: block;
  font: 10px var(--mono);
  color: #607366;
  margin-bottom: 8px;
}
.journey-nodes b {
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  display: block;
}
.journey-nodes > div.journey-active {
  border-color: #a8bca8;
  background: #e7eee2;
  box-shadow: 0 0 20px #234d360b;
}
.journey-active > span {
  color: #286c34 !important;
}
.packet-conversation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 25px 0;
  padding: 24px 18px;
  background: #f0f4eb;
  border: 1px solid #dce3d8;
  border-radius: 8px;
  font: 11px var(--mono);
  color: #607366;
}
.packet-beam {
  color: #286c34;
  font-size: 15px;
}
.demo-toggle {
  display: flex !important;
  align-items: center;
  gap: 12px;
  line-height: 1.8;
}
.demo-toggle input {
  width: auto;
  accent-color: #a7e8af;
  min-height: 17px;
}
.policy-list {
  padding-left: 28px;
  font-size: 12px;
}
.policy-list li {
  font: 12px/1.9 var(--mono);
  color: #607366;
}
.demo-pass {
  color: #286c2f;
}
.demo-warning {
  color: #6c4028;
}
.url-anatomy {
  display: grid;
  gap: 8px;
  margin: 18px 0;
}
.url-anatomy > div {
  padding: 14px 16px;
  background: #f0f4eb;
  border: 1px solid #dce3d8;
  border-radius: 7px;
  min-width: 0;
}
.url-anatomy span,
.hash-compare > span {
  display: block;
  font: 9px var(--mono);
  letter-spacing: 0.08em;
  color: #607366;
  margin-bottom: 7px;
}
.url-anatomy code {
  font-size: 12px;
  background: transparent;
  padding: 0;
  display: block;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.url-anatomy .url-host {
  border-color: #a8bca8;
  background: #e7eee277;
}
.url-host span {
  color: #193a2c;
}
.factor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.factor-grid label {
  margin: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 15px;
  border: 1px solid #a8bca8;
  border-radius: 8px;
  background: #f0f4eb;
  font-size: 13px;
}
.factor-grid label input {
  width: auto;
  accent-color: #b2edb8;
}
.hash-compare {
  padding: 20px;
  border: 1px solid #dce3d8;
  background: #fbfcf8;
  border-radius: 9px;
}
.hash-compare pre {
  font-size: 10px;
  margin: 8px 0 22px;
  word-break: break-all;
  border: 0;
  padding: 0;
  background: transparent;
}
.hash-compare pre:last-of-type {
  margin-bottom: 15px;
}
#hash-bit-map {
  display: grid;
  grid-template-columns: repeat(16, minmax(0, 1fr));
  gap: 3px;
}
#hash-bit-map span {
  font: 10px var(--mono);
  text-align: center;
  color: #607366;
  border-radius: 3px;
  background: #f0f4eb;
  padding: 3px 0;
}
#hash-bit-map span.changed {
  color: #6c4828;
  background: #e7eee2;
}
.access-object {
  display: grid;
  gap: 9px;
  background: #fbfcf8;
  border: 1px solid #a8bca8;
  padding: 22px;
  border-radius: 9px;
}
.access-object > span {
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  color: #607366;
}
.access-object strong {
  font-size: 21px;
  font-weight: 550;
}
.access-object small {
  font-size: 12px;
  color: #607366;
}
.path-section-title {
  font-size: 20px;
  margin: 10px 0 17px;
  color: #193a2c;
}
.path-section-title > span {
  font: 10px var(--mono);
  display: block;
  color: #385c43;
  margin-top: 8px;
  line-height: 1.7;
}
.path-steps > .path-section-title:not(:first-child) {
  margin-top: 27px;
}
.lesson-journal {
  margin-top: 28px;
}
.lesson-journal .journal-icon {
  background: #e7eee2;
  color: #426c28;
}
.lesson-header-meta {
  display: flex;
  gap: 18px;
  align-items: center;
  font: 11px var(--mono);
  color: #355f42;
}
.lesson-preview {
  margin-top: 32px;
}
.lesson-preview .lesson-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.lesson-preview .lesson-card {
  padding: 22px;
}
.lesson-preview .lesson-card h3 {
  font-size: 20px;
}
.lesson-preview .lesson-card > p {
  font-size: 12px;
}
.lesson-preview .lesson-card-footer {
  font-size: 10px;
  gap: 10px;
}
@media (max-height: 820px) and (min-width: 761px) {
  .sidebar {
    overflow-y: auto;
  }
  .sidebar .daily-card {
    display: none;
  }
  .sidebar-bottom {
    padding-top: 20px;
  }
}
@media (max-width: 1150px) {
  .reading-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 22px;
  }
  .reading-toc {
    padding-left: 15px;
    padding-right: 10px;
  }
  .reading-chapter,
  .reading-experiment,
  .reading-finish,
  .reading-objectives {
    padding: 27px;
  }
  .journey-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .lesson-preview .lesson-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .lesson-preview .lesson-card:last-child {
    display: none;
  }
  .lesson-card {
    padding: 24px;
  }
  .lesson-card h3 {
    font-size: 23px;
  }
  .lesson-card-footer {
    font-size: 10px;
    gap: 11px;
  }
  .lesson-card-footer b {
    font-size: 11px;
  }
}
@media (max-width: 850px) {
  .reading-layout {
    grid-template-columns: 1fr;
  }
  .reading-toc {
    position: static;
    border-left: 0;
    border-bottom: 1px solid #a8bca8;
    padding: 0 0 22px;
  }
  .reading-toc ol {
    display: flex;
    flex-wrap: wrap;
    gap: 7px 28px;
    margin: 17px 0;
  }
  .reading-toc li {
    padding: 2px 0;
    font-size: 12px;
  }
  .reading-score {
    max-width: 320px;
    margin: 20px 0;
  }
  .reading-toc > a {
    display: none;
  }
  .reading-content {
    max-width: 100%;
  }
  .reading-content h2 {
    font-size: 28px;
  }
  .reading-content p,
  .reading-content li {
    font-size: 13px;
  }
  .reading-check .choice {
    font-size: 12px;
  }
  .lesson-card h3 {
    font-size: 22px;
  }
  .lesson-cards {
    gap: 17px;
  }
  .lesson-card > p {
    font-size: 12px;
  }
  .lesson-library-intro {
    padding: 20px;
  }
  .lesson-library-intro h2 {
    font-size: 20px;
  }
}
@media (max-width: 600px) {
  .lesson-cards,
  .lesson-preview .lesson-cards {
    grid-template-columns: 1fr;
  }
  .lesson-preview .lesson-card:last-child {
    display: flex;
  }
  .lesson-card {
    padding: 26px;
  }
  .lesson-card h3 {
    font-size: 25px;
  }
  .lesson-card > p {
    font-size: 13px;
  }
  .lesson-card-footer {
    font-size: 11px;
  }
  .lesson-card-footer > b {
    font-size: 12px;
  }
  .lesson-preview .lesson-card {
    padding: 25px;
  }
  .lesson-preview .lesson-card h3 {
    font-size: 24px;
  }
  .lesson-preview .lesson-card > p {
    font-size: 13px;
  }
  .lesson-preview .lesson-card-footer {
    font-size: 11px;
  }
  .reading-chapter,
  .reading-experiment,
  .reading-finish,
  .reading-objectives {
    padding: 24px 21px;
  }
  .reading-content h2 {
    font-size: 27px;
  }
  .reading-content p,
  .reading-content li {
    font-size: 13px;
  }
  .reading-content th,
  .reading-content td {
    font-size: 11px;
    padding: 10px 6px;
  }
  .reading-next {
    flex-direction: column;
    gap: 23px;
  }
  .reading-next > div {
    text-align: left;
  }
  .reading-next span {
    font-size: 11px;
  }
  .reading-next > div > a {
    font-size: 13px;
  }
  .reading-check {
    padding: 18px 15px;
  }
  .reading-check legend {
    font-size: 13px;
  }
  .reading-check .choice {
    font-size: 12px;
  }
  .reading-content pre {
    font-size: 11px;
  }
  .demo-mission {
    font-size: 12px !important;
    padding: 14px;
  }
  .journey-nodes b {
    font-size: 12px;
  }
  .factor-grid {
    grid-template-columns: 1fr;
  }
  .packet-conversation {
    font-size: 9px;
    padding: 20px 12px;
    gap: 10px;
  }
  .packet-beam {
    font-size: 13px;
  }
  .demo-output {
    font-size: 11px;
    padding: 16px;
  }
  .demo-output p {
    font-size: 11px;
  }
  .lesson-library-intro {
    align-items: start;
    padding: 21px;
    gap: 12px;
  }
  .lesson-library-intro > span {
    height: 35px;
    width: 35px;
  }
  .lesson-library-intro h2 {
    font-size: 20px;
  }
  .lesson-library-intro p {
    font-size: 12px;
  }
  .lesson-header-meta {
    font-size: 10px;
    gap: 13px;
  }
  .path-section-title {
    font-size: 20px;
  }
  .path-section-title > span {
    font-size: 9px;
  }
  #hash-bit-map {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}