.algorithm-learning-app {
  --alg-bg: #f8f9fa;
  --alg-surface: #ffffff;
  --alg-surface-muted: #f8fbff;
  --alg-border: #dee2e6;
  --alg-border-strong: #ced4da;
  --alg-ink: #212529;
  --alg-muted: #6c757d;
  --alg-accent: #0d6efd;
  --alg-accent-strong: #0a58ca;
  --alg-accent-soft: rgba(13, 110, 253, 0.08);
  --alg-success: #198754;
  --alg-warning: #fd7e14;
  --alg-shadow-sm: 0 0.4rem 0.9rem rgba(33, 37, 41, 0.05);
  --alg-shadow-md: 0 0.9rem 1.8rem rgba(33, 37, 41, 0.07);
  --alg-radius-xl: 1.75rem;
  --alg-radius-lg: 1.25rem;
  --alg-radius-md: 1rem;
  --alg-radius-sm: 0.75rem;
  --alg-space-1: 0.5rem;
  --alg-space-2: 0.75rem;
  --alg-space-3: 1rem;
  --alg-space-4: 1.25rem;
  --alg-space-5: 1.5rem;
  --alg-space-6: 1.75rem;
  --alg-space-7: 2rem;
  --alg-space-8: 2.5rem;
  --alg-app-padding: clamp(1rem, 2vw, 1.6rem);
  --alg-card-padding: clamp(1rem, 2vw, 1.5rem);
  --alg-sidebar-width: minmax(19rem, 22rem);
  position: relative;
  width: 100%;
  max-width: 96rem;
  margin: 2rem auto;
  padding: var(--alg-app-padding);
  border: 1px solid var(--alg-border);
  border-radius: 2rem;
  background: var(--alg-bg);
  box-shadow: var(--alg-shadow-md);
  color: var(--alg-ink);
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

.algorithm-learning-app,
.algorithm-learning-app *,
.algorithm-learning-app *::before,
.algorithm-learning-app *::after {
  box-sizing: border-box;
}

.algorithm-learning-app__boot,
.algorithm-learning-app__loading,
.algorithm-learning-app__error {
  padding: 3.5rem 1.5rem;
  text-align: center;
  color: var(--alg-muted);
  font-size: 1rem;
}

.algorithm-learning-app__error {
  color: #b02a37;
}

.algorithm-learning-shell {
  display: grid;
  gap: var(--alg-space-5);
  min-width: 0;
}

.algorithm-learning-nav,
.algorithm-learning-sidebar,
.algorithm-learning-main,
.algorithm-learning-section,
.algorithm-learning-part {
  border: 1px solid var(--alg-border);
  background: var(--alg-surface);
  box-shadow: var(--alg-shadow-sm);
}

.algorithm-learning-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--alg-space-4);
  width: 100%;
  margin: 0;
  padding: clamp(1.2rem, 2vw, 1.7rem);
  border-radius: var(--alg-radius-xl);
}

.algorithm-learning-nav__brand {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}

.algorithm-learning-nav__subtitle {
  color: var(--alg-accent);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.2;
}

.algorithm-learning-nav__title {
  margin: 0;
  color: var(--alg-ink);
  font-family: "Paperlogy", "Pretendard Variable", "Noto Sans KR", sans-serif;
  font-size: clamp(1.75rem, 2.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.algorithm-learning-nav__toggle {
  display: none;
  white-space: nowrap;
  min-height: 2.8rem;
}

.algorithm-learning-overlay {
  display: none;
}

.algorithm-learning-layout {
  display: grid;
  grid-template-columns: var(--alg-sidebar-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--alg-space-5);
  min-width: 0;
}

.algorithm-learning-sidebar,
.algorithm-learning-main {
  min-width: 0;
  padding: var(--alg-card-padding);
  border-radius: var(--alg-radius-xl);
}

.algorithm-learning-sidebar {
  position: sticky;
  top: 1.25rem;
  display: flex;
  flex-direction: column;
  align-self: start;
}

.algorithm-learning-sidebar__header {
  display: grid;
  gap: var(--alg-space-3);
  margin-bottom: var(--alg-space-5);
}

.algorithm-learning-sidebar__header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--alg-space-2);
}

.algorithm-learning-sidebar__eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  background: var(--alg-accent-soft);
  color: var(--alg-accent);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
}

.algorithm-learning-sidebar__close {
  display: none;
}

.algorithm-learning-sidebar__title {
  margin: 0;
  color: var(--alg-ink);
  font-family: "Paperlogy", "Pretendard Variable", "Noto Sans KR", sans-serif;
  font-size: clamp(1.45rem, 1.8vw, 1.75rem);
  font-weight: 700;
  line-height: 1.22;
}

.algorithm-learning-sidebar__summary {
  margin: 0;
  color: var(--alg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.algorithm-learning-toc {
  display: grid;
  gap: var(--alg-space-4);
  max-height: calc(100vh - 18rem);
  overflow-y: auto;
  padding-right: 0.35rem;
  scrollbar-width: thin;
  overscroll-behavior: contain;
}

.algorithm-learning-toc::-webkit-scrollbar {
  width: 0.55rem;
}

.algorithm-learning-toc::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(108, 117, 125, 0.28);
}

.algorithm-learning-toc::-webkit-scrollbar-track {
  background: transparent;
}

.algorithm-learning-sidebar-nav {
  display: grid;
  gap: 0.9rem;
}

.algorithm-learning-sidebar-group {
  border: 1px solid #dfe6ee;
  border-radius: 1rem;
  background: #ffffff;
  overflow: hidden;
}

.algorithm-learning-sidebar-group.is-open {
  border-color: #b6d4fe;
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.08);
}

.algorithm-learning-sidebar-group__button {
  position: relative;
  display: grid;
  gap: 0.55rem;
  width: 100%;
  padding: 1rem 3rem 1rem 1rem;
  border: 0;
  background: #ffffff;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.algorithm-learning-sidebar-group__button::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 1.15rem;
  width: 0.72rem;
  height: 0.72rem;
  border-right: 2px solid #6c757d;
  border-bottom: 2px solid #6c757d;
  transform: translateY(-62%) rotate(45deg);
  transition: transform 180ms ease, border-color 180ms ease;
}

.algorithm-learning-sidebar-group.is-open .algorithm-learning-sidebar-group__button::after {
  border-color: var(--alg-accent);
  transform: translateY(-38%) rotate(225deg);
}

.algorithm-learning-sidebar-group__header {
  display: grid;
  gap: 0.5rem;
}

.algorithm-learning-sidebar-group__title {
  display: block;
  color: var(--alg-ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  word-break: keep-all;
}

.algorithm-learning-sidebar-group__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.algorithm-learning-sidebar-group__summary {
  margin: 0;
  color: var(--alg-muted);
  font-size: 0.93rem;
  line-height: 1.65;
}

.algorithm-learning-sidebar-group__panel {
  display: none;
  gap: 0.85rem;
  padding: 0 1rem 1rem;
  border-top: 1px solid #edf2f7;
}

.algorithm-learning-sidebar-group.is-open .algorithm-learning-sidebar-group__panel {
  display: grid;
}

.algorithm-learning-sidebar-chapter {
  border: 1px solid #edf2f7;
  border-radius: 0.9rem;
  background: #fbfcfe;
  overflow: hidden;
}

.algorithm-learning-sidebar-chapter__button {
  position: relative;
  display: grid;
  gap: 0.55rem;
  width: 100%;
  padding: 0.9rem 2.6rem 0.9rem 0.95rem;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.algorithm-learning-sidebar-chapter__button::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 1rem;
  width: 0.62rem;
  height: 0.62rem;
  border-right: 2px solid #6c757d;
  border-bottom: 2px solid #6c757d;
  transform: translateY(-62%) rotate(45deg);
  transition: transform 180ms ease, border-color 180ms ease;
}

.algorithm-learning-sidebar-chapter.is-open .algorithm-learning-sidebar-chapter__button::after {
  border-color: var(--alg-accent);
  transform: translateY(-38%) rotate(225deg);
}

.algorithm-learning-sidebar-chapter__title {
  display: block;
  color: var(--alg-accent-strong);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.45;
  word-break: keep-all;
}

.algorithm-learning-sidebar-chapter__meta-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.algorithm-learning-sidebar-chapter__panel {
  display: none;
  gap: 0.7rem;
  padding: 0 0.85rem 0.85rem;
  border-top: 1px solid #edf2f7;
}

.algorithm-learning-sidebar-chapter.is-open .algorithm-learning-sidebar-chapter__panel {
  display: grid;
}

.algorithm-learning-part {
  overflow: hidden;
  padding: 0;
  border-radius: var(--alg-radius-lg);
}

.algorithm-learning-part[open],
.algorithm-learning-part.is-open {
  border-color: #cfe2ff;
  box-shadow: 0 0 0 0.18rem rgba(13, 110, 253, 0.05);
}

.algorithm-learning-part__toggle {
  display: block;
  position: relative;
  cursor: pointer;
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  padding: var(--alg-card-padding);
  padding-right: calc(var(--alg-card-padding) + 1.5rem);
}

.algorithm-learning-part__toggle::-webkit-details-marker {
  display: none;
}

.algorithm-learning-part__toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  right: var(--alg-card-padding);
  width: 0.7rem;
  height: 0.7rem;
  border-right: 2px solid #6c757d;
  border-bottom: 2px solid #6c757d;
  transform: translateY(-62%) rotate(45deg);
  transition: transform 180ms ease, border-color 180ms ease;
}

.algorithm-learning-part[open] .algorithm-learning-part__toggle::after,
.algorithm-learning-part.is-open .algorithm-learning-part__toggle::after {
  border-color: var(--alg-accent);
  transform: translateY(-38%) rotate(225deg);
}

.algorithm-learning-part__header {
  display: grid;
  gap: var(--alg-space-2);
  min-width: 0;
}

.algorithm-learning-part__title {
  display: block;
  margin: 0;
  color: var(--alg-ink);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.35;
}

.algorithm-learning-part__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.algorithm-learning-part__summary {
  margin: 0;
  color: var(--alg-muted);
  font-size: 0.94rem;
  line-height: 1.65;
}

.algorithm-learning-part__content {
  display: grid;
  gap: var(--alg-space-3);
  padding: 0 var(--alg-card-padding) var(--alg-card-padding);
}

.algorithm-learning-part:not([open]):not(.is-open) .algorithm-learning-part__content {
  display: none;
}

.algorithm-learning-chapter {
  border-top: 1px solid #edf2f7;
  padding-top: var(--alg-space-3);
}

.algorithm-learning-chapter:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.algorithm-learning-chapter__toggle {
  display: block;
  position: relative;
  cursor: pointer;
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  color: var(--alg-accent-strong);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
  padding-right: 1.5rem;
}

.algorithm-learning-chapter__toggle::-webkit-details-marker {
  display: none;
}

.algorithm-learning-chapter__toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0.15rem;
  width: 0.6rem;
  height: 0.6rem;
  border-right: 2px solid #6c757d;
  border-bottom: 2px solid #6c757d;
  transform: translateY(-62%) rotate(45deg);
  transition: transform 180ms ease, border-color 180ms ease;
}

.algorithm-learning-chapter[open] .algorithm-learning-chapter__toggle::after,
.algorithm-learning-chapter.is-open .algorithm-learning-chapter__toggle::after {
  border-color: var(--alg-accent);
  transform: translateY(-38%) rotate(225deg);
}

.algorithm-learning-chapter__body {
  display: grid;
}

.algorithm-learning-chapter__meta,
.algorithm-learning-item__meta,
.algorithm-learning-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.algorithm-learning-chapter__meta {
  margin-top: 0.65rem;
}

.algorithm-learning-item-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.85rem;
}

.algorithm-learning-chapter:not([open]):not(.is-open) .algorithm-learning-chapter__body,
.algorithm-learning-chapter:not([open]):not(.is-open) .algorithm-learning-chapter__meta,
.algorithm-learning-chapter:not([open]):not(.is-open) .algorithm-learning-item-list {
  display: none;
}

.algorithm-learning-item {
  display: grid;
  gap: 0.45rem;
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--alg-radius-md);
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.algorithm-learning-item:hover,
.algorithm-learning-item:focus-visible {
  border-color: #b6d4fe;
  background: #f5f9ff;
  outline: none;
  transform: translateY(-1px);
}

.algorithm-learning-item.is-active {
  border-color: #9ec5fe;
  background: #e7f1ff;
}

.algorithm-learning-item strong {
  display: block;
  color: var(--alg-ink);
  font-size: 1rem;
  line-height: 1.45;
}

.algorithm-learning-item span {
  color: var(--alg-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.algorithm-learning-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.62rem;
  border-radius: 999px;
  background: rgba(108, 117, 125, 0.12);
  color: var(--alg-muted);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.15;
}

.algorithm-learning-chip[data-tone="ready"] {
  background: rgba(25, 135, 84, 0.12);
  color: var(--alg-success);
}

.algorithm-learning-chip[data-tone="planned"] {
  background: rgba(253, 126, 20, 0.14);
  color: var(--alg-warning);
}

.algorithm-learning-chip[data-tone="accent"] {
  background: rgba(13, 110, 253, 0.1);
  color: var(--alg-accent-strong);
}

.algorithm-learning-main {
  display: grid;
  gap: var(--alg-space-4);
}

.algorithm-learning-page {
  display: grid;
  gap: var(--alg-space-4);
}

.algorithm-learning-sequence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.algorithm-learning-sequence__button {
  display: grid;
  gap: 0.35rem;
  width: 100%;
  min-width: 0;
  padding: 1rem 1.1rem;
  border: 1px solid #dbe5f0;
  border-radius: 1rem;
  background: #ffffff;
  color: inherit;
  text-align: left;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.algorithm-learning-sequence__button:hover,
.algorithm-learning-sequence__button:focus-visible {
  border-color: #9ec5fe;
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.08);
  outline: none;
}

.algorithm-learning-sequence__button:disabled {
  opacity: 0.55;
  cursor: default;
  box-shadow: none;
}

.algorithm-learning-sequence__eyebrow {
  color: var(--alg-accent);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.2;
}

.algorithm-learning-sequence__title {
  color: var(--alg-ink);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  word-break: keep-all;
}

.algorithm-learning-sequence__summary {
  color: var(--alg-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.algorithm-learning-hero {
  display: grid;
  gap: var(--alg-space-4);
  padding: clamp(1.35rem, 2.5vw, 2rem);
  border: 1px solid #cfe2ff;
  border-radius: var(--alg-radius-xl);
  background: linear-gradient(180deg, rgba(13, 110, 253, 0.03), #ffffff 72%);
}

.algorithm-learning-hero__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--alg-space-4);
}

.algorithm-learning-hero__content {
  min-width: 0;
  flex: 1 1 auto;
}

.algorithm-learning-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: 0.85rem;
  color: var(--alg-accent);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.2;
}

.algorithm-learning-hero__title {
  margin: 0 0 0.9rem;
  color: var(--alg-ink);
  font-family: "Paperlogy", "Pretendard Variable", "Noto Sans KR", sans-serif;
  font-size: clamp(1.95rem, 3.2vw, 3rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.algorithm-learning-hero__summary {
  max-width: 54rem;
  margin: 0;
  color: var(--alg-muted);
  font-size: 1rem;
  line-height: 1.72;
}

.algorithm-learning-meta {
  margin-top: 0.1rem;
}

.algorithm-learning-print-button {
  align-self: flex-start;
  padding-inline: 1rem;
  white-space: nowrap;
  word-break: keep-all;
  min-width: max-content;
}

.algorithm-learning-view-switch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.8rem 0.95rem;
  border: 1px solid #d6e4f5;
  border-radius: var(--alg-radius-md);
  background: #f8fafc;
}

.algorithm-learning-view-switch__label {
  color: var(--alg-muted);
  font-size: 0.9rem;
  font-weight: 700;
  white-space: nowrap;
}

.algorithm-learning-view-switch__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

.algorithm-learning-view-switch__button {
  border: 1px solid #d6e4f5;
  border-radius: 999px;
  background: #ffffff;
  color: var(--alg-accent-strong);
  font-weight: 700;
}

.algorithm-learning-view-switch__button:hover,
.algorithm-learning-view-switch__button:focus-visible {
  border-color: #9ec5fe;
  background: #f6faff;
  color: var(--alg-accent-strong);
  outline: none;
}

.algorithm-learning-view-switch__button.is-active,
.algorithm-learning-view-switch__button[aria-pressed="true"] {
  border-color: var(--alg-accent);
  background: var(--alg-accent);
  color: #ffffff;
  box-shadow: 0 0.35rem 0.8rem rgba(13, 110, 253, 0.18);
}

.algorithm-learning-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.algorithm-learning-tab {
  padding: 0.62rem 0.92rem;
  border: 1px solid #d6e4f5;
  border-radius: 999px;
  background: #ffffff;
  color: var(--alg-accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.25;
  cursor: pointer;
  box-shadow: none;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.algorithm-learning-tab:hover,
.algorithm-learning-tab:focus-visible {
  border-color: #9ec5fe;
  background: #f6faff;
  outline: none;
  transform: translateY(-1px);
}

.algorithm-learning-tab.is-active {
  border-color: #9ec5fe;
  background: #e7f1ff;
  color: var(--alg-accent-strong);
}

.algorithm-learning-app .algorithm-learning-tab[aria-selected="true"],
.algorithm-learning-app .algorithm-learning-tab.is-active {
  border-color: var(--alg-accent);
  background: var(--alg-accent);
  color: #ffffff;
  box-shadow: 0 0.4rem 0.9rem rgba(13, 110, 253, 0.22);
}

.algorithm-learning-app .algorithm-learning-tab[aria-selected="true"]:hover,
.algorithm-learning-app .algorithm-learning-tab[aria-selected="true"]:focus-visible,
.algorithm-learning-app .algorithm-learning-tab.is-active:hover,
.algorithm-learning-app .algorithm-learning-tab.is-active:focus-visible {
  border-color: var(--alg-accent-strong);
  background: var(--alg-accent-strong);
  color: #ffffff;
}

.algorithm-learning-sections {
  display: grid;
  gap: var(--alg-space-4);
}

.algorithm-learning-sections-viewport {
  width: 100%;
  min-width: 0;
  transition: height 280ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.algorithm-learning-page.is-slide-view .algorithm-learning-sections {
  display: flex;
  align-items: flex-start;
  gap: 0;
  width: 100%;
  max-width: 100%;
  transition: transform 340ms cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
}

.algorithm-learning-page.is-slide-view .algorithm-learning-sections-viewport {
  overflow: hidden;
}

.algorithm-learning-page.is-slide-view .algorithm-learning-sections.is-dragging {
  transition: none;
}

.algorithm-learning-page.is-slide-view .algorithm-learning-section[data-section-index] {
  align-self: flex-start;
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.algorithm-learning-page.is-continuous-view .algorithm-learning-section[data-section-index] {
  display: grid;
}

.algorithm-learning-slide-controls {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid #d6e4f5;
  border-radius: var(--alg-radius-md);
  background: #ffffff;
}

.algorithm-learning-page.is-slide-view .algorithm-learning-slide-controls {
  display: flex;
}

.algorithm-learning-slide-controls__button {
  min-width: 4.5rem;
  white-space: nowrap;
}

.algorithm-learning-slide-controls__status {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
  text-align: center;
}

.algorithm-learning-slide-controls__counter {
  color: var(--alg-accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
}

.algorithm-learning-slide-controls__title {
  overflow: hidden;
  color: var(--alg-ink);
  font-size: 0.95rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.algorithm-learning-section {
  display: grid;
  gap: var(--alg-space-3);
  padding: clamp(1.15rem, 2vw, 1.5rem);
  border-radius: var(--alg-radius-lg);
  scroll-margin-top: 1.5rem;
  transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.algorithm-learning-section.is-focused {
  border-color: #9ec5fe;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.08);
}

.algorithm-learning-section__title,
.algorithm-learning-placeholder__title {
  margin: 0;
  color: var(--alg-ink);
  font-family: "Paperlogy", "Pretendard Variable", "Noto Sans KR", sans-serif;
  font-size: clamp(1.3rem, 1.8vw, 1.65rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.algorithm-learning-section__intro,
.algorithm-learning-placeholder__text,
.algorithm-learning-paragraph,
.algorithm-learning-callout,
.algorithm-learning-card__body,
.algorithm-learning-qa__answer {
  color: var(--alg-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.algorithm-learning-stack,
.algorithm-learning-list,
.algorithm-learning-steps,
.algorithm-learning-qa {
  display: grid;
  gap: var(--alg-space-3);
}

.algorithm-learning-list {
  margin: 0;
  padding-left: 1.2rem;
}

.algorithm-learning-list li,
.algorithm-learning-steps li {
  color: var(--alg-ink);
  line-height: 1.75;
}

.algorithm-learning-definition {
  display: grid;
  gap: 0.85rem;
}

.algorithm-learning-definition__row {
  display: grid;
  grid-template-columns: minmax(8rem, 11rem) minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #fbfcfe;
}

.algorithm-learning-definition__term {
  color: var(--alg-accent-strong);
  font-weight: 700;
  line-height: 1.5;
}

.algorithm-learning-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--alg-space-3);
}

.algorithm-learning-card {
  display: grid;
  gap: 0.6rem;
  align-content: start;
  padding: 1rem 1.1rem;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #ffffff;
}

.algorithm-learning-card__body {
  margin: 0;
  padding: 0;
}

.algorithm-learning-card__title {
  margin: 0;
  color: var(--alg-ink);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
}

.algorithm-learning-steps {
  margin: 0;
  padding-left: 1.3rem;
}

.algorithm-learning-table-wrap {
  overflow-x: auto;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #ffffff;
}

.algorithm-learning-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  background: #ffffff;
}

.algorithm-learning-table th,
.algorithm-learning-table td {
  padding: 0.88rem 1rem;
  border-bottom: 1px solid #e9ecef;
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
}

.algorithm-learning-table th {
  background: #f8f9fa;
  color: var(--alg-ink);
  font-size: 0.92rem;
  font-weight: 700;
}

.algorithm-learning-table td {
  color: var(--alg-muted);
  font-size: 0.95rem;
}

.algorithm-learning-code {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #f8f9fa;
  color: #1f2328;
  font-family: "D2Coding", "JetBrains Mono", "Cascadia Code", monospace;
  font-size: 0.93rem;
  line-height: 1.7;
}

.algorithm-learning-chart,
.algorithm-learning-graph,
.algorithm-learning-illustration {
  overflow-x: auto;
  padding: 0.85rem;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #ffffff;
}

.algorithm-learning-chart svg,
.algorithm-learning-graph svg,
.algorithm-learning-illustration svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 32rem;
}

.algorithm-learning-illustration svg {
  min-width: 0;
}

.algorithm-learning-visual__caption,
.algorithm-learning-workflow__caption {
  margin: 0;
  color: var(--alg-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.algorithm-learning-visual__explanation {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem 1rem;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #fbfcfe;
}

.algorithm-learning-chart__grid,
.algorithm-learning-graph__grid {
  stroke: #e9ecef;
  stroke-width: 1;
}

.algorithm-learning-chart__axis,
.algorithm-learning-graph__axis {
  stroke: #adb5bd;
  stroke-width: 1.5;
}

.algorithm-learning-chart__axis-label,
.algorithm-learning-chart__label,
.algorithm-learning-chart__value,
.algorithm-learning-graph__axis-label,
.algorithm-learning-graph__legend {
  fill: #6c757d;
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 12px;
}

.algorithm-learning-chart__value {
  fill: #212529;
  font-weight: 700;
}

.algorithm-learning-graph__legend {
  fill: #212529;
  font-weight: 600;
}

.algorithm-learning-illustration__title,
.algorithm-learning-illustration__subtitle {
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

.algorithm-learning-illustration__title {
  fill: #212529;
  font-size: 16px;
  font-weight: 700;
}

.algorithm-learning-illustration__subtitle {
  fill: #6c757d;
  font-size: 13px;
}

.algorithm-learning-illustration__note {
  fill: #64748b;
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 11px;
}

.algorithm-learning-illustration__mini-label,
.algorithm-learning-illustration__flag {
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

.algorithm-learning-illustration__mini-label {
  fill: #475569;
  font-size: 11px;
  font-weight: 700;
}

.algorithm-learning-illustration__flag {
  fill: #2563eb;
  font-size: 11px;
  font-weight: 800;
}

.algorithm-learning-illustration__flag--max {
  fill: #d97706;
}

.algorithm-learning-illustration__node-value {
  fill: #1f2937;
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

.algorithm-learning-illustration__move-label {
  font-family: "Pretendard Variable", "SUIT Variable", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 11px;
  font-weight: 800;
}

.algorithm-learning-callout {
  padding: 1rem 1.1rem;
  border: 1px solid #e9ecef;
  border-left: 0.35rem solid var(--alg-accent);
  border-radius: var(--alg-radius-md);
  background: #f8fbff;
}

.algorithm-learning-callout[data-tone="info"],
.algorithm-learning-callout[data-tone="accent"] {
  border-left-color: var(--alg-accent);
  background: #f8fbff;
}

.algorithm-learning-callout[data-tone="ready"] {
  border-left-color: var(--alg-success);
  background: #f2fbf6;
}

.algorithm-learning-callout[data-tone="planned"] {
  border-left-color: var(--alg-warning);
  background: #fff8f2;
}

.algorithm-learning-nav__toggle,
.algorithm-learning-sidebar__close,
.algorithm-learning-print-button {
  border-color: #cfe2ff;
  color: #0a58ca;
  background: #ffffff;
  box-shadow: none;
}

.algorithm-learning-nav__toggle:hover,
.algorithm-learning-sidebar__close:hover,
.algorithm-learning-print-button:hover,
.algorithm-learning-nav__toggle:focus-visible,
.algorithm-learning-sidebar__close:focus-visible,
.algorithm-learning-print-button:focus-visible {
  border-color: #9ec5fe;
  background: #f3f8ff;
  color: #084298;
}

.algorithm-learning-qa__item {
  padding: 1rem 1.1rem;
  border: 1px solid #e9ecef;
  border-radius: var(--alg-radius-md);
  background: #ffffff;
}

.algorithm-learning-qa__question {
  margin: 0 0 0.55rem;
  color: var(--alg-ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.algorithm-learning-qa__answer {
  margin: 0;
}

.algorithm-learning-placeholder {
  min-height: 18rem;
  align-content: center;
}

.algorithm-learning-app button:focus-visible,
.algorithm-learning-app [role="tab"]:focus-visible,
.algorithm-learning-app summary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.16);
}

body.algorithm-learning-sidebar-open {
  overflow: hidden;
}

@media (max-width: 1080px) {
  .algorithm-learning-app {
    --alg-app-padding: clamp(0.9rem, 3vw, 1.25rem);
    --alg-card-padding: clamp(1rem, 3vw, 1.2rem);
    margin: 1.25rem auto;
    border-radius: 1.5rem;
  }

  .algorithm-learning-nav {
    padding: 1.1rem 1.2rem;
  }

  .algorithm-learning-nav__title {
    font-size: clamp(1.6rem, 4.4vw, 2rem);
  }

  .algorithm-learning-nav__toggle {
    display: inline-flex;
  }

  .algorithm-learning-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .algorithm-learning-overlay.is-visible {
    position: fixed;
    inset: 0;
    z-index: 998;
    display: block;
    background: rgba(33, 37, 41, 0.24);
  }

  .algorithm-learning-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 999;
    width: min(24rem, 88vw);
    max-width: 100%;
    height: 100dvh;
    max-height: none;
    overflow: hidden;
    border-radius: 0 1.5rem 1.5rem 0;
    transform: translateX(-104%);
    transition: transform 220ms ease;
    box-shadow: 0 1.25rem 2.5rem rgba(33, 37, 41, 0.16);
  }

  .algorithm-learning-sidebar__header {
    position: sticky;
    top: 0;
    z-index: 2;
    margin: 0;
    padding-bottom: 1rem;
    background: var(--alg-surface);
  }

  .algorithm-learning-toc {
    flex: 1 1 auto;
    min-height: 0;
    max-height: none;
    padding-top: 0.1rem;
  }

  .algorithm-learning-sidebar-nav {
    gap: 0.8rem;
  }

  .algorithm-learning-sidebar-group__button {
    padding: 0.95rem 2.8rem 0.95rem 0.95rem;
  }

  .algorithm-learning-sidebar-group__button::after {
    right: 1rem;
  }

  .algorithm-learning-sidebar-group__title {
    font-size: 0.97rem;
  }

  .algorithm-learning-sidebar-group__panel {
    padding: 0 0.95rem 0.95rem;
  }

  .algorithm-learning-sidebar-chapter__button {
    padding: 0.8rem 2.5rem 0.8rem 0.85rem;
  }

  .algorithm-learning-sidebar-chapter__button::after {
    right: 0.9rem;
  }

  .algorithm-learning-sidebar-chapter__title {
    font-size: 0.93rem;
  }

  .algorithm-learning-sidebar-chapter__panel {
    padding: 0 0.8rem 0.8rem;
  }

  .algorithm-learning-item-list {
    gap: 0.55rem;
    margin-top: 0;
  }

  .algorithm-learning-item {
    padding: 0.8rem 0.9rem;
  }

  .algorithm-learning-sidebar.is-open {
    transform: translateX(0);
  }

  .algorithm-learning-sidebar.is-open .algorithm-learning-sidebar__close {
    display: inline-flex;
  }
}

@media (max-width: 900px) {
  .algorithm-learning-app {
    padding: 0.85rem;
    border-radius: 1.35rem;
    border-color: #eef2f6;
    background: #ffffff;
    box-shadow: none;
  }

  .algorithm-learning-nav,
  .algorithm-learning-main {
    border-radius: 1.35rem;
  }

  .algorithm-learning-main {
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .algorithm-learning-page {
    gap: 1rem;
  }

  .algorithm-learning-hero {
    gap: 1rem;
    padding: 1.1rem 1rem;
    border-radius: 1.15rem;
    background: #ffffff;
    box-shadow: none;
  }

  .algorithm-learning-hero__top {
    flex-direction: column;
    align-items: stretch;
  }

  .algorithm-learning-print-button {
    align-self: flex-start;
  }

  .algorithm-learning-sequence {
    grid-template-columns: minmax(0, 1fr);
  }

  .algorithm-learning-view-switch {
    display: none;
  }

  .algorithm-learning-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.2rem;
    scrollbar-width: thin;
  }

  .algorithm-learning-tab {
    flex: 0 0 auto;
  }

  .algorithm-learning-app .algorithm-learning-tab[aria-selected="true"],
  .algorithm-learning-app .algorithm-learning-tab.is-active {
    background: var(--alg-accent);
    color: #ffffff;
  }

  .algorithm-learning-sections {
    gap: 0.35rem;
  }

  .algorithm-learning-page.is-slide-view .algorithm-learning-sections {
    gap: 0;
  }

  .algorithm-learning-section {
    gap: 0.9rem;
    padding: 1rem 0;
    border: 0;
    border-top: 1px solid #edf2f7;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .algorithm-learning-sections > .algorithm-learning-section:first-child {
    padding-top: 0;
    border-top: 0;
  }

  .algorithm-learning-page.is-slide-view .algorithm-learning-section {
    padding: 0;
    border: 0;
  }

  .algorithm-learning-section.is-focused {
    border-top-color: #9ec5fe;
    box-shadow: none;
  }

  .algorithm-learning-definition__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.55rem;
    padding: 0.85rem 0;
    border: 0;
    border-bottom: 1px solid #edf2f7;
    border-radius: 0;
    background: transparent;
  }

  .algorithm-learning-table {
    min-width: 30rem;
  }

  .algorithm-learning-cards {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
  }

  .algorithm-learning-card,
  .algorithm-learning-qa__item {
    padding: 0.9rem 0;
    border: 0;
    border-bottom: 1px solid #edf2f7;
    border-radius: 0;
    background: transparent;
  }

  .algorithm-learning-callout {
    padding: 0.9rem 1rem;
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    border-radius: 0.9rem;
    background: #f8fbff;
  }

  .algorithm-learning-table-wrap,
  .algorithm-learning-code,
  .algorithm-learning-chart,
  .algorithm-learning-graph,
  .algorithm-learning-illustration,
  .algorithm-learning-visual__explanation {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .algorithm-learning-table-wrap {
    padding: 0;
  }

  .algorithm-learning-code {
    padding: 0.85rem 0;
    background: #f8f9fa;
    border-radius: 0.9rem;
  }

  .algorithm-learning-chart,
  .algorithm-learning-graph,
  .algorithm-learning-illustration {
    padding: 0.35rem 0;
  }

  .algorithm-learning-chart svg,
  .algorithm-learning-graph svg {
    min-width: 28rem;
  }

  .algorithm-learning-illustration svg {
    min-width: 0;
  }

  .algorithm-learning-visual__explanation {
    padding: 0.85rem 0;
  }

}

@media (max-width: 640px) {
  .algorithm-learning-app {
    padding: 0.7rem;
    border-radius: 1rem;
  }

  .algorithm-learning-nav {
    gap: 0.9rem;
    padding: 0.95rem;
    border-radius: 1rem;
  }

  .algorithm-learning-nav__subtitle {
    font-size: 0.85rem;
  }

  .algorithm-learning-nav__title {
    font-size: clamp(1.45rem, 8vw, 1.85rem);
  }

  .algorithm-learning-main,
  .algorithm-learning-section,
  .algorithm-learning-part,
  .algorithm-learning-sidebar {
    padding: 1rem;
  }

  .algorithm-learning-main,
  .algorithm-learning-section {
    padding: 0;
  }

  .algorithm-learning-view-switch,
  .algorithm-learning-slide-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .algorithm-learning-view-switch__buttons,
  .algorithm-learning-slide-controls {
    width: 100%;
  }

  .algorithm-learning-view-switch__button {
    flex: 1 1 8rem;
  }

  .algorithm-learning-slide-controls {
    gap: 0.65rem;
  }

  .algorithm-learning-slide-controls__status {
    order: -1;
  }

  .algorithm-learning-slide-controls__title {
    white-space: normal;
  }

  .algorithm-learning-part {
    padding: 0;
  }

  .algorithm-learning-part__toggle {
    padding: 1rem;
    padding-right: 2.4rem;
  }

  .algorithm-learning-part__content {
    padding: 0 1rem 1rem;
  }

  .algorithm-learning-sidebar {
    width: min(22rem, 92vw);
    border-radius: 0 1.25rem 1.25rem 0;
  }

  .algorithm-learning-sidebar__header {
    padding-bottom: 0.9rem;
  }

  .algorithm-learning-toc {
    gap: 0.7rem;
  }

  .algorithm-learning-sidebar-group__button {
    padding: 0.9rem 2.65rem 0.9rem 0.9rem;
  }

  .algorithm-learning-sidebar-group__panel {
    padding: 0 0.9rem 0.9rem;
  }

  .algorithm-learning-sidebar-chapter__button {
    padding: 0.76rem 2.35rem 0.76rem 0.78rem;
  }

  .algorithm-learning-sidebar-chapter__panel {
    padding: 0 0.75rem 0.75rem;
  }

  .algorithm-learning-hero__title {
    font-size: clamp(1.75rem, 9vw, 2.3rem);
  }

  .algorithm-learning-hero {
    gap: 0.85rem;
    padding: 1rem 0.9rem;
  }

  .algorithm-learning-hero__summary,
  .algorithm-learning-section__intro,
  .algorithm-learning-placeholder__text,
  .algorithm-learning-paragraph,
  .algorithm-learning-callout,
  .algorithm-learning-card__body,
  .algorithm-learning-qa__answer,
  .algorithm-learning-sidebar__summary {
    font-size: 0.96rem;
  }

  .algorithm-learning-code {
    font-size: 0.88rem;
    padding: 0.8rem 0.9rem;
  }

  .algorithm-learning-table {
    min-width: 26rem;
  }

  .algorithm-learning-chart svg,
  .algorithm-learning-graph svg {
    min-width: 25rem;
  }

  .algorithm-learning-illustration svg {
    min-width: 0;
  }

  .algorithm-learning-visual__caption,
  .algorithm-learning-workflow__caption {
    font-size: 0.88rem;
  }

  .algorithm-learning-cards,
  .algorithm-learning-qa,
  .algorithm-learning-definition {
    gap: 0.55rem;
  }

}

@media print {
  .algorithm-learning-nav__toggle,
  .algorithm-learning-overlay,
  .algorithm-learning-sidebar,
  .algorithm-learning-print-button,
  .algorithm-learning-view-switch,
  .algorithm-learning-slide-controls,
  .algorithm-learning-tabs {
    display: none !important;
  }

  .algorithm-learning-app {
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: #ffffff;
  }

  .algorithm-learning-main,
  .algorithm-learning-section,
  .algorithm-learning-hero {
    border: 0;
    box-shadow: none;
    background: #ffffff;
  }
}