:root {
  --ink: #2c2538;
  --muted: #70667b;
  --bg: #f7f5fa;
  --paper: #fff;
  --line: #e4ddea;
  --navy: #2c193d;
  --teal: #70429b;
  --mint: #ffc663;
  --blue: #70429b;
  --orange: #d48625;
  --red: #bb3750;
  --radius: 14px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
input,
select,
textarea {
  font: inherit;
}
button,
a,
input,
select,
summary {
  touch-action: manipulation;
}
button {
  cursor: pointer;
}
button:disabled {
  cursor: default;
}
a {
  color: var(--teal);
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #4364dc;
  outline-offset: 4px;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.5;
  letter-spacing: -0.04em;
}
h2 {
  font-size: 1.25rem;
  line-height: 1.6;
}
h3 {
  font-size: 1.05rem;
  line-height: 1.6;
}
p {
  line-height: 1.9;
}
small {
  font-size: 0.8rem;
}
button {
  border: 0;
  background: none;
  color: inherit;
}
svg {
  flex-shrink: 0;
}
img {
  max-width: 100%;
}
.shell {
  min-height: 100vh;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 236px;
  background: var(--paper);
  border-right: 1px solid var(--line);
  padding: 32px 22px;
  display: flex;
  flex-direction: column;
  z-index: 30;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.brand-symbol {
  background: var(--navy);
  color: var(--mint);
  width: 40px;
  height: 40px;
  border-radius: 13px;
  display: grid;
  place-items: center;
}
.brand small {
  display: block;
  letter-spacing: 0.02em;
  font-weight: 500;
  font-size: 0.73rem;
  color: var(--muted);
  margin-top: 4px;
}
.nav {
  display: grid;
  gap: 8px;
  margin-top: 44px;
}
.nav a {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  padding: 14px;
  border-radius: 13px;
  color: var(--muted);
  font-size: 0.91rem;
  font-weight: 650;
}
.nav a.active {
  background: var(--navy);
  color: white;
}
.sidebar-foot {
  margin-top: auto;
  padding-top: 28px;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.9;
}
.page {
  margin-left: 236px;
  padding: 30px 42px 70px;
  max-width: 1680px;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 33px;
}
.breadcrumb {
  font-size: 0.88rem;
  color: var(--muted);
}
.profile-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
}
.avatar {
  display: grid;
  place-items: center;
  background: #d7f6ed;
  color: var(--teal);
  font-weight: 700;
  width: 35px;
  height: 35px;
  border-radius: 50%;
}
.eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.13em;
  font-weight: 750;
  color: var(--teal);
  margin-bottom: 9px;
}
.intro-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 24px;
}
.subtle {
  color: var(--muted);
  font-size: 0.9rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  gap: 24px;
}
.mission {
  position: relative;
  background: var(--navy);
  color: white;
  border-radius: var(--radius);
  padding: 32px;
  overflow: hidden;
  min-height: 330px;
  display: flex;
  flex-direction: column;
}
.mission .eyebrow {
  color: var(--mint);
}
.mission h2 {
  font-size: 1.65rem;
  line-height: 1.6;
  margin: 12px 0;
}
.mission p {
  color: #becbdc;
  font-size: 0.92rem;
}
.mission .primary {
  margin-top: auto;
  align-self: flex-start;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 30px;
  background: #eef2f8;
  color: var(--muted);
  padding: 6px 11px;
  font-size: 0.78rem;
}
.mission .pill {
  background: #ffffff12;
  color: #c8d4e8;
}
.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 23px;
  border-radius: 12px;
  font-weight: 750;
  min-height: 48px;
  text-decoration: none;
}
.primary {
  background: var(--mint);
  color: var(--navy);
}
.primary:hover {
  filter: brightness(0.95);
}
.secondary {
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 20px;
}
.lab-preview {
  background: linear-gradient(145deg, #fff, #eaf6f6);
}
.flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 145px;
  flex-wrap: wrap;
}
.flow-node {
  background: white;
  border: 1px solid #b9dcd7;
  border-radius: 17px;
  padding: 17px 15px;
  text-align: center;
  font-size: 0.9rem;
  box-shadow: 0 6px 18px #174c4110;
}
.flow-node strong {
  display: block;
  color: var(--teal);
  margin-top: 8px;
}
.flow-arrow {
  color: var(--teal);
  font-size: 1.4rem;
}
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin: 30px 0 16px;
}
.section-head a {
  font-size: 0.85rem;
  text-decoration: none;
  font-weight: 650;
}
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.subject-card {
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 22px;
}
.subject-card:hover {
  border-color: #64b7a7;
  transform: translateY(-2px);
}
.subject-card .number {
  display: block;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.subject-card p {
  font-size: 0.84rem;
  color: var(--muted);
  margin-top: 5px;
}
.row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.spacer {
  flex: 1;
}
.text-link {
  font-size: 0.86rem;
  color: var(--teal);
  font-weight: 700;
}
.mobile-brand {
  display: none;
}
.empty {
  padding: 45px 22px;
  text-align: center;
  color: var(--muted);
}
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy);
  color: white;
  padding: 12px 20px;
  border-radius: 12px;
  z-index: 100;
  max-width: 90vw;
  display: none;
}
.note {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.8;
}
.progress-track {
  height: 7px;
  background: #e7eef5;
  border-radius: 10px;
  overflow: hidden;
}
.progress-track span {
  height: 100%;
  display: block;
  background: var(--teal);
  border-radius: 10px;
}
.tag {
  display: inline-block;
  padding: 5px 10px;
  border-radius: 7px;
  background: #e9f6f2;
  color: var(--teal);
  font-size: 0.76rem;
}
.footer-note {
  margin-top: 40px;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.9;
}
.btn-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: white;
  border-radius: 12px;
}
@media (min-width: 1500px) {
  .page {
    padding-left: 65px;
    padding-right: 65px;
  }
}
@media (max-width: 1100px) {
  .sidebar {
    width: 200px;
    padding: 28px 15px;
  }
  .page {
    margin-left: 200px;
    padding: 26px;
  }
  .hero-grid {
    gap: 16px;
  }
  .mission {
    padding: 26px;
  }
  .subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 760px) {
  .sidebar {
    inset: auto 0 0;
    width: 100%;
    height: 76px;
    padding: 0 8px max(4px, env(safe-area-inset-bottom));
    border: 0;
    border-top: 1px solid var(--line);
    background: #fffffffa;
  }
  .sidebar .brand,
  .sidebar-foot {
    display: none;
  }
  .nav {
    display: flex;
    justify-content: space-around;
    margin: 0;
    gap: 0;
  }
  .nav a {
    flex: 1;
    flex-direction: column;
    gap: 4px;
    border-radius: 0;
    font-size: 0.68rem;
    padding: 10px 2px;
    min-width: 0;
  }
  .nav a.active {
    background: transparent;
    color: var(--teal);
  }
  .nav a:nth-child(6) {
    display: none;
  }
  .page {
    margin-left: 0;
    padding: 20px 18px 110px;
  }
  .topbar {
    margin-bottom: 24px;
  }
  .breadcrumb {
    display: none;
  }
  .mobile-brand {
    display: block;
    font-size: 1rem;
    font-weight: 850;
    letter-spacing: 0.04em;
  }
  .intro-row {
    align-items: start;
  }
  .intro-row .subtle {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .mission {
    min-height: 280px;
    padding: 26px;
  }
  .mission h2 {
    font-size: 1.45rem;
  }
  .lab-preview {
    padding: 22px;
  }
  .subject-grid {
    gap: 10px;
  }
  .subject-card {
    padding: 18px 15px;
  }
  .subject-card h3 {
    font-size: 0.95rem;
  }
  .subject-card .number {
    margin-bottom: 10px;
  }
  .section-head {
    margin-top: 26px;
  }
  .profile-badge {
    font-size: 0.75rem;
  }
  .card {
    padding: 21px;
  }
  .flow {
    gap: 7px;
  }
  .flow-node {
    padding: 16px 10px;
    font-size: 0.83rem;
  }
  #toast {
    bottom: 92px;
  }
  .footer-note {
    font-size: 0.75rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
.profile-badge,
.mobile-brand {
  text-decoration: none;
  color: var(--ink);
}
.map-mobile {
  display: none;
}
.sidebar-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.sidebar-progress strong {
  font-size: 1rem;
  color: var(--ink);
}
.sidebar-foot p {
  margin: 18px 0 10px;
  font-size: 0.74rem;
}
.sidebar-foot a {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.daily-ring {
  width: 115px;
  height: 115px;
  flex-shrink: 0;
  border: 7px solid #d6eae6;
  border-top-color: var(--teal);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.daily-ring strong {
  font-size: 1.7rem;
}
.daily-ring small {
  font-size: 0.75rem;
  color: var(--muted);
}
.daily-ring span {
  font-size: 0.68rem;
  color: var(--muted);
  margin-top: 4px;
}
.mission-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 19px 0 28px;
  font-size: 0.76rem;
  color: #bdd3e1;
}
.mission-tags span {
  border: 1px solid #ffffff25;
  padding: 5px 8px;
  border-radius: 6px;
}
.text-white {
  color: #cfdee8;
  font-size: 0.83rem;
}
.body-preview {
  height: 254px;
  position: relative;
  margin-top: -10px;
  margin-bottom: -4px;
}
.body-preview canvas {
  width: 100%;
  height: 100%;
  outline: none;
}
.model-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  pointer-events: none;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin: 22px 0;
}
.quick-card {
  display: flex;
  align-items: center;
  text-align: left;
  gap: 14px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
}
.quick-card:hover {
  border-color: var(--teal);
}
.quick-card b {
  margin-left: auto;
  color: var(--muted);
  font-weight: 500;
}
.quick-card strong {
  display: block;
  font-size: 0.97rem;
}
.quick-card small {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 6px;
}
.quick-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  flex-shrink: 0;
}
.teal {
  background: #e4f5ef;
  color: var(--teal);
}
.blue {
  background: #e9ecfe;
  color: var(--blue);
}
.orange {
  background: #fff0d9;
  color: #a56117;
}
.school-strip {
  display: flex;
  align-items: center;
  gap: 17px;
  border: 1px solid #c8d9ee;
  background: #eaf0fb;
  border-radius: 15px;
  padding: 20px;
}
.school-strip strong {
  font-size: 0.91rem;
}
.school-strip p {
  font-size: 0.77rem;
  color: #526883;
  margin-top: 5px;
}
.school-strip a {
  margin-left: auto;
  white-space: nowrap;
  font-size: 0.82rem;
  text-decoration: none;
  font-weight: 700;
  color: #3553a6;
}
.school-mark {
  color: #4668b8;
}
.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.concept-card {
  display: flex;
  flex-direction: column;
  background: white;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 23px;
  text-decoration: none;
  color: var(--ink);
  transition:
    transform 0.18s,
    border-color 0.18s;
}
.concept-card:hover {
  transform: translateY(-3px);
  border-color: #90bfb6;
}
.concept-card h3 {
  margin: 20px 0 11px;
  font-size: 1.07rem;
}
.concept-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 22px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.concept-card-foot {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.74rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 13px;
}
.learning-footer {
  display: flex;
  align-items: center;
  gap: 23px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 34px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
}
.filter-panel {
  background: white;
  border: 1px solid var(--line);
  padding: 20px;
  border-radius: 18px;
  margin-bottom: 25px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 0 14px;
  color: var(--muted);
  background: #f9fbfd;
  min-height: 50px;
}
.search-box input {
  border: 0 !important;
  background: transparent !important;
  width: 100%;
  padding: 12px 0 !important;
  outline: none;
  font-size: 1rem;
  min-width: 0;
}
.search-box:focus-within {
  outline: 2px solid #5c9ca4;
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 15px;
  flex-wrap: wrap;
}
.filter-row select {
  max-width: 230px;
}
.check-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.9rem;
  white-space: nowrap;
}
input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--teal);
  flex-shrink: 0;
}
select,
input:not([type="checkbox"], [type="range"], [type="file"]),
textarea {
  border: 1px solid #cfd9e5;
  border-radius: 9px;
  padding: 12px;
  color: var(--ink);
  background: white;
  font-size: 1rem;
}
select {
  max-width: 100%;
}
textarea {
  min-height: 130px;
  width: 100%;
  line-height: 1.8;
  resize: vertical;
  margin: 14px 0;
}
form > label,
.form-grid > label {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.88rem;
  margin: 20px 0;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.full {
  width: 100%;
  margin-top: 14px;
}
.center {
  display: flex;
  justify-content: center;
  margin-top: 25px;
}
.article-breadcrumb {
  font-size: 0.83rem;
  color: var(--muted);
  margin-bottom: 26px;
}
.article-breadcrumb a {
  text-decoration: none;
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 30px;
  align-items: start;
}
.article {
  min-width: 0;
  background: white;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 36px;
}
.article-head h1 {
  margin-top: 22px;
}
.aliases {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 12px 0;
}
.article-summary {
  font-size: 1.05rem;
  line-height: 1.95;
  margin: 23px 0 27px;
  color: #43566e;
  border-left: 4px solid var(--mint);
  padding-left: 19px;
}
.article-tools {
  display: grid;
  gap: 20px;
  position: sticky;
  top: 20px;
}
.article-tools .card {
  padding: 22px;
}
.article-tools .primary,
.article-tools .secondary {
  font-size: 0.88rem;
  padding: 12px;
}
.article-tools h3 {
  margin-bottom: 10px;
}
.article-tools .external-link {
  margin-top: 16px;
}
.article-figure {
  margin: 0 0 35px;
  padding: 20px;
  background: #f8f9fb;
  border: 1px solid var(--line);
  border-radius: 13px;
}
.article-figure img {
  display: block;
  max-height: 530px;
  object-fit: contain;
  margin: auto;
  background: white;
  cursor: zoom-in;
}
.article-figure figcaption {
  font-size: 0.75rem;
  line-height: 1.8;
  margin-top: 14px;
  color: var(--muted);
}
.article-section {
  position: relative;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.article-section h2 {
  padding-left: 42px;
  margin-bottom: 18px;
}
.article-section p {
  font-size: 1rem;
  color: #344961;
  line-height: 2;
}
.section-num {
  position: absolute;
  top: 34px;
  left: 0;
  color: var(--teal);
  font-size: 0.8rem;
  font-weight: 750;
}
.connections {
  background: #edf7f3;
  padding: 25px;
  border-radius: 16px;
  margin-top: 36px;
}
.connections h2 {
  margin-bottom: 17px;
}
.connection {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 14px 0;
  border-top: 1px solid #d0e8df;
  text-decoration: none;
  color: var(--ink);
}
.connection > span {
  color: var(--teal);
  margin-top: 5px;
}
.connection p {
  font-size: 0.88rem;
  color: #577366;
  margin-top: 7px;
}
.sources-detail {
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 13px;
  overflow-wrap: anywhere;
}
.sources-detail summary {
  font-weight: 650;
  font-size: 0.91rem;
  cursor: pointer;
}
.source-list {
  padding-left: 20px;
  line-height: 1.8;
  font-size: 0.84rem;
  overflow-wrap: anywhere;
}
.source-list li {
  margin: 12px 0;
}
.source-list small {
  display: block;
  color: var(--muted);
}
.saved {
  background: #d8f3e8;
  color: var(--teal);
}
.external-link {
  display: block;
  line-height: 1.8;
  font-size: 0.87rem;
}
.quiz-top {
  display: flex;
  gap: 28px;
  align-items: center;
  margin-bottom: 28px;
}
.quiz-top .text-link {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
}
.quiz-top .progress-track {
  flex: 1;
}
.quiz-top strong {
  font-size: 1rem;
  white-space: nowrap;
}
.quiz-top strong span {
  color: var(--muted);
  font-weight: 400;
}
.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 35px;
  align-items: start;
}
.question-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 34px;
}
.question-card h1 {
  font-size: 1.4rem;
  line-height: 1.8;
  letter-spacing: -0.02em;
  margin: 28px 0 17px;
}
.action-guide {
  font-size: 0.86rem;
  color: var(--muted);
  margin-bottom: 19px;
}
.choices {
  display: grid;
  gap: 12px;
}
.choice {
  display: flex;
  align-items: center;
  gap: 15px;
  width: 100%;
  text-align: left;
  border: 1.5px solid var(--line);
  border-radius: 13px;
  padding: 17px 19px;
  background: white;
  line-height: 1.7;
  font-size: 1rem;
}
.choice:hover:not(:disabled) {
  background: #f2f9f6;
  border-color: var(--teal);
}
.choice:disabled {
  opacity: 1;
}
.choice-key {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 8px;
  background: #f0f3f8;
  color: var(--muted);
  font-size: 0.8rem;
}
.choice.correct {
  background: #e7f7ef;
  border-color: #20a478;
  color: #125239;
}
.choice.wrong {
  background: #fff0f0;
  border-color: #d76877;
}
.choice > svg {
  margin-left: auto;
}
.confidence {
  margin: 25px 0 0;
  padding: 18px 0 0;
  border: 0;
  border-top: 1px dashed var(--line);
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}
.confidence legend {
  padding: 0 8px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}
.confidence legend small {
  font-size: 0.72rem;
  margin-left: 8px;
}
.confidence button {
  border: 1px solid var(--line);
  padding: 10px 13px;
  border-radius: 9px;
  font-size: 0.85rem;
  flex: 1;
  white-space: nowrap;
}
.confidence button.active {
  background: #e9edf9;
  border-color: #8396cd;
  color: #2b458a;
}
.quiz-side {
  padding: 28px 5px;
  position: sticky;
  top: 25px;
}
.quiz-side h2 {
  font-size: 1.15rem;
  line-height: 1.8;
}
.quest-score {
  margin: 27px 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.quest-score strong {
  font-size: 2.8rem;
  color: var(--teal);
  font-weight: 650;
}
.quest-score span {
  font-size: 0.8rem;
  color: var(--muted);
}
.quest-dots {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.quest-dots span {
  width: 14px;
  height: 14px;
  border-radius: 5px;
  background: #e6edf4;
}
.quest-dots .ok {
  background: #28b18c;
}
.quest-dots .again {
  background: #e9af64;
}
.answer-feedback {
  margin-top: 27px;
  border-radius: 17px;
  padding: 25px;
  background: #edf8f3;
  border: 1px solid #b8dccd;
}
.answer-feedback.bad {
  background: #fff8eb;
  border-color: #e9d6b2;
}
.answer-feedback .eyebrow {
  color: var(--teal);
}
.answer-feedback h2 {
  font-size: 1.15rem;
}
.answer-feedback p {
  font-size: 0.97rem;
}
.answer-feedback .correct-answer {
  font-weight: 700;
  margin: 16px 0;
}
.answer-feedback details {
  font-size: 0.84rem;
  margin-top: 16px;
}
.answer-feedback summary {
  cursor: pointer;
}
.feedback-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 22px;
}
.feedback-links a {
  display: flex;
  gap: 8px;
  align-items: center;
  text-decoration: none;
}
.answer-input {
  width: 100%;
  margin-bottom: 15px;
  min-height: 55px;
}
#answer-form .primary {
  width: 100%;
}
.sequence-answer {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 18px;
  background: #f4f7fb;
  min-height: 68px;
  border-radius: 13px;
  margin-bottom: 18px;
}
.sequence-answer > span {
  color: var(--muted);
  font-size: 0.85rem;
}
.sequence-answer button {
  background: #dff2e9;
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.9rem;
}
.sequence-answer + .choices {
  margin-bottom: 20px;
}
.quiz-model {
  position: relative;
  height: 480px;
  background: radial-gradient(ellipse, #e5f0ee, #f4f7fa);
  border: 1px solid var(--line);
  border-radius: 17px;
  margin: 16px 0;
}
.quiz-model canvas {
  width: 100%;
  height: 100%;
}
.quest-complete {
  text-align: center;
  background: white;
  padding: 45px 30px;
  border: 1px solid var(--line);
  border-radius: 24px;
}
.completion-icon {
  width: 85px;
  height: 85px;
  background: #d5f7e9;
  color: var(--teal);
  border-radius: 26px;
  margin: 0 auto 24px;
  display: grid;
  place-items: center;
  transform: rotate(-6deg);
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 700px;
  margin: 32px auto;
  gap: 15px;
}
.result-grid > div {
  background: #f2f6fa;
  padding: 23px 12px;
  border-radius: 13px;
}
.result-grid strong {
  font-size: 2rem;
  display: block;
  font-weight: 650;
}
.result-grid strong small {
  font-size: 1rem;
  color: var(--muted);
}
.result-grid span {
  font-size: 0.82rem;
  color: var(--muted);
}
.anatomy-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: start;
}
.anatomy-stage {
  border: 1px solid #d3e0e6;
  border-radius: 24px;
  padding: 22px;
  background: radial-gradient(ellipse at 50% 50%, #e0eeeb 0, #eff4f7 65%);
  position: sticky;
  top: 20px;
}
.model-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 0.72rem;
  color: #536b79;
  letter-spacing: 0.06em;
}
.body-model {
  height: 570px;
  position: relative;
  touch-action: none;
}
.body-model canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.model-toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 15px 0;
}
.model-toolbar button {
  min-width: 44px;
  min-height: 42px;
  border-radius: 9px;
  border: 1px solid #c6d7de;
  background: #ffffffce;
  padding: 9px 12px;
  font-size: 0.83rem;
}
.anatomy-panel {
  display: grid;
  gap: 18px;
}
.anatomy-panel .card {
  padding: 22px;
}
.layer-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 10px;
  margin: 20px 0;
}
.layer-list label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}
.layer-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}
.layer-dot.skeleton {
  background: #baa987;
}
.layer-dot.muscles {
  background: #c76663;
}
.layer-dot.nerves {
  background: #d9aa20;
}
.layer-dot.arteries {
  background: #ce444b;
}
.layer-dot.veins {
  background: #567dcc;
}
.layer-dot.organs {
  background: #aa7a75;
}
.part-list {
  max-height: 310px;
  overflow: auto;
  margin-top: 15px;
}
.part-list button {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 12px 3px;
  border-bottom: 1px solid var(--line);
  font-size: 0.89rem;
}
.part-list button:hover {
  color: var(--teal);
}
.part-list small {
  color: var(--muted);
  font-size: 0.71rem;
  white-space: nowrap;
}
.part-related {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}
.part-related a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.88rem;
  text-decoration: none;
  line-height: 1.6;
}
.model-notes {
  margin-top: 25px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  font-size: 0.85rem;
  line-height: 1.9;
}
.model-notes summary {
  cursor: pointer;
  font-weight: 600;
}
.model-notes p {
  margin-top: 10px;
}
.lab-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 14px;
  margin-bottom: 10px;
  scrollbar-width: thin;
}
.lab-tabs button {
  white-space: nowrap;
  background: white;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 13px 17px;
  font-size: 0.89rem;
}
.lab-tabs button.active {
  background: var(--navy);
  border-color: var(--navy);
  color: white;
}
.lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 24px;
  align-items: start;
}
.lab-workspace {
  border: 1px solid var(--line);
  background: white;
  border-radius: 24px;
  padding: 29px;
}
.scenario-tabs {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  margin: 20px 0;
}
.scenario-tabs button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 13px;
  font-size: 0.84rem;
}
.scenario-tabs button.active {
  border-color: var(--teal);
  color: var(--teal);
  background: #edf8f3;
}
.trigger-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #f1f5fa;
  border-radius: 12px;
  padding: 17px 18px;
  margin-bottom: 25px;
}
.trigger-box span {
  background: #dce5f1;
  color: #4b6280;
  padding: 5px 9px;
  border-radius: 6px;
  font-size: 0.73rem;
  white-space: nowrap;
}
.trigger-box strong {
  font-size: 0.94rem;
  line-height: 1.7;
}
.mechanism-flow {
  display: grid;
  gap: 24px;
  padding: 0 18px;
}
.mechanism-node {
  position: relative;
  border: 1px solid #d6e1e8;
  border-radius: 15px;
  display: grid;
  grid-template-columns: 35px 1fr;
  gap: 5px 13px;
  align-items: center;
  padding: 19px;
  text-align: left;
  background: #f6f8fb;
}
.mechanism-node .step-number {
  grid-row: span 2;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #e1e8f1;
  color: #698199;
  font-size: 0.76rem;
}
.mechanism-node strong {
  font-size: 0.96rem;
}
.node-detail {
  font-size: 0.87rem;
  color: var(--muted);
}
.mechanism-node.revealed {
  background: #e9f7ef;
  border-color: #96cbb6;
}
.mechanism-node.revealed .step-number {
  background: var(--teal);
  color: white;
}
.mechanism-node.current {
  box-shadow: 0 0 0 3px #24c49420;
}
.mechanism-arrow {
  position: absolute;
  bottom: -26px;
  left: 50%;
  font-size: 1.4rem;
  color: #8ea3b5;
  line-height: 26px;
}
.mechanism-node.revealed .mechanism-arrow {
  color: var(--teal);
}
.lab-result {
  display: flex;
  align-items: center;
  gap: 13px;
  margin: 28px 0 20px;
  padding: 20px;
  border: 1px dashed #c2d3dd;
  border-radius: 12px;
  color: var(--muted);
  font-size: 0.9rem;
  min-height: 70px;
}
.lab-result.revealed {
  background: var(--navy);
  border: 0;
  color: white;
}
.lab-result.revealed svg {
  color: var(--mint);
}
.lab-disclaimer {
  margin-top: 20px;
  font-size: 0.75rem;
}
.lab-explanation {
  display: grid;
  gap: 18px;
}
.lab-explanation p:not(.eyebrow) {
  font-size: 0.92rem;
  margin-top: 13px;
  line-height: 1.95;
  color: #465b71;
}
.care-card {
  background: #f0f6ff;
  border-color: #ccdaf0;
}
.care-card .eyebrow {
  color: #4268b9;
}
.video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.video-grid figure {
  margin: 0;
}
.video-grid video {
  width: 100%;
  max-height: 290px;
  background: white;
  border-radius: 11px;
}
.video-grid figcaption {
  margin-top: 15px;
}
.curriculum-intro {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 28px;
}
.curriculum-intro p {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 10px;
}
.curriculum-intro a {
  white-space: nowrap;
  text-decoration: none;
}
.year-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 23px;
}
.year-tabs button {
  display: flex;
  align-items: center;
  gap: 17px;
  border: 1px solid var(--line);
  background: white;
  text-align: left;
  border-radius: 16px;
  padding: 22px;
}
.year-tabs b {
  font-size: 1.8rem;
  font-weight: 500;
  color: #adbbcd;
}
.year-tabs span {
  font-size: 1rem;
  font-weight: 700;
}
.year-tabs small {
  display: block;
  font-size: 0.74rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 6px;
}
.year-tabs .active {
  background: var(--navy);
  color: white;
  border-color: var(--navy);
}
.year-tabs .active b {
  color: var(--mint);
}
.year-tabs .active small {
  color: #bbcadd;
}
.school-info h2 {
  margin: 19px 0;
}
.route-steps {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 20px 0;
}
.route-steps div {
  background: #f1f5f9;
  padding: 10px 13px;
  border-radius: 9px;
  font-size: 0.84rem;
  display: flex;
  gap: 10px;
  align-items: center;
}
.route-steps span {
  font-size: 0.75rem;
  color: var(--teal);
  font-weight: 700;
}
.school-info details {
  font-size: 0.88rem;
  line-height: 1.9;
  margin-top: 22px;
}
.school-info details li {
  margin: 14px 0;
}
.school-info details a {
  font-size: 0.76rem;
}
.curriculum-domains {
  display: grid;
  gap: 15px;
}
.domain-block {
  background: white;
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 0 23px;
}
.domain-block > summary {
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  padding: 22px 0;
}
.domain-block > summary::-webkit-details-marker {
  display: none;
}
.domain-block > summary:after {
  content: "＋";
  color: var(--muted);
  font-size: 1.2rem;
}
.domain-block[open] > summary:after {
  content: "−";
}
.domain-no {
  width: 39px;
  height: 39px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #eaf3f1;
  color: var(--teal);
  font-size: 0.83rem;
}
.domain-block summary strong {
  font-size: 1.01rem;
}
.domain-block summary small {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 7px;
}
.domain-count {
  color: var(--muted);
  font-size: 0.8rem;
}
.domain-block > .note {
  padding: 0 0 20px;
}
.curriculum-unit {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}
.curriculum-unit label {
  display: flex;
  gap: 10px;
  align-items: center;
  cursor: pointer;
}
.curriculum-unit strong {
  font-size: 0.92rem;
}
.curriculum-unit p {
  font-size: 0.83rem;
  color: var(--muted);
  padding-left: 28px;
  margin: 10px 0;
}
.unit-links {
  padding-left: 28px;
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}
.unit-links a {
  font-size: 0.8rem;
  background: #edf7f2;
  padding: 5px 9px;
  border-radius: 6px;
  text-decoration: none;
}
.coverage-pending {
  font-size: 0.77rem;
  color: #8a715a;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 26px;
}
.stat-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 24px;
}
.stat-card > span {
  color: var(--muted);
  font-size: 0.83rem;
  display: block;
}
.stat-card strong {
  display: block;
  font-size: 2.1rem;
  font-weight: 650;
  margin-top: 17px;
}
.stat-card small {
  color: var(--muted);
  font-size: 0.9rem;
  margin-left: 7px;
}
.progress-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 23px;
  align-items: start;
}
.stack {
  display: grid;
  gap: 20px;
}
.field-progress {
  display: grid;
  gap: 21px;
}
.field-progress a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.85rem;
}
.field-progress .row {
  margin-bottom: 10px;
}
.field-progress .row span {
  font-size: 0.76rem;
  color: var(--muted);
}
.field-progress small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.74rem;
}
.activity-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 7px;
  margin: 21px 0;
}
.activity-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  background: #edf1f6;
  border-radius: 8px;
  padding: 10px 3px;
  min-width: 0;
}
.activity-day strong {
  font-size: 0.8rem;
  font-weight: 600;
}
.activity-day span {
  font-size: 0.64rem;
  color: var(--muted);
}
.activity-day.level-1 {
  background: #d2f1e2;
}
.activity-day.level-2 {
  background: #aae6cc;
}
.activity-day.level-3 {
  background: #60cba9;
}
.activity-day.level-4 {
  background: #158c70;
  color: white;
}
.activity-day.level-4 span {
  color: white;
}
.history-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.history-list > a {
  display: block;
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
}
.history-list p {
  font-size: 0.9rem;
  margin: 13px 0;
  line-height: 1.8;
}
.history-list small {
  color: var(--muted);
  font-size: 0.76rem;
}
.history-detail {
  margin-top: 30px;
  font-size: 0.9rem;
}
.history-detail summary {
  cursor: pointer;
  margin-bottom: 16px;
}
.history-row {
  display: flex;
  gap: 15px;
  border-bottom: 1px solid var(--line);
  padding: 13px 0;
  align-items: center;
  font-size: 0.85rem;
}
.history-row small {
  margin-left: auto;
  color: var(--muted);
}
.ok-text {
  color: var(--teal);
}
.bad-text {
  color: #af742d;
}
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
.settings-grid p {
  font-size: 0.93rem;
  margin: 13px 0;
}
.settings-grid .note {
  font-size: 0.81rem;
}
.file-label {
  cursor: pointer;
  font-size: 0.9rem;
}
.scope-items {
  max-height: 430px;
  overflow: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 20px;
  margin: 20px 0;
}
.scope-items > label {
  display: flex;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 15px 0;
  cursor: pointer;
}
.scope-items strong {
  font-size: 0.85rem;
  font-weight: 600;
}
.scope-items small {
  display: block;
  font-size: 0.73rem;
  color: var(--muted);
  margin-top: 5px;
}
.scope-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 15px;
}
.scope-card h3 {
  margin: 10px 0 6px;
}
.materials-note {
  margin-top: 30px;
}
.materials-note p {
  font-size: 0.92rem;
  margin: 13px 0;
}
.materials-note .note {
  font-size: 0.82rem;
}
.scope-summary p {
  margin-top: 16px;
  font-size: 0.96rem;
  line-height: 1.95;
}
.scope-summary .note {
  font-size: 0.84rem;
}
.sources-layout {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 25px;
  align-items: start;
  margin-top: 5px;
}
.sources-layout > aside {
  padding-top: 77px;
}
.sources-layout .card > p {
  font-size: 0.93rem;
}
.sources-layout .card > ul:not(.source-list) {
  font-size: 0.85rem;
  line-height: 1.9;
  padding-left: 20px;
}
.science-source {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.science-source:first-child {
  padding-top: 0;
}
.science-source:last-child {
  border: 0;
  padding-bottom: 0;
}
.science-source p {
  font-size: 0.9rem;
  margin-top: 11px;
}
.data-layers {
  list-style: none;
  counter-reset: layers;
  padding: 0;
}
.data-layers li {
  counter-increment: layers;
  position: relative;
  padding: 17px 0 17px 35px;
  border-bottom: 1px solid var(--line);
}
.data-layers li:before {
  content: counter(layers);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--teal);
  font-weight: 700;
}
.data-layers strong {
  font-size: 0.9rem;
}
.data-layers span {
  display: block;
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--muted);
  margin-top: 6px;
}
.all-sources {
  background: white;
}
.credit-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
.credit-item p {
  font-size: 0.82rem;
  margin-top: 8px;
}
.modal {
  border: 0;
  border-radius: 24px;
  padding: 36px;
  max-width: min(570px, calc(100vw - 30px));
  max-height: 90vh;
  overflow: auto;
  color: var(--ink);
  box-shadow: 0 20px 100px #091b3c55;
}
.modal::backdrop {
  background: #0f203a80;
  backdrop-filter: blur(4px);
}
.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
}
.tutorial {
  padding: 15px 0 0;
}
.tutorial-icon {
  width: 80px;
  height: 80px;
  background: #e1f6ee;
  color: var(--teal);
  border-radius: 22px;
  display: grid;
  place-items: center;
  margin-bottom: 26px;
}
.tutorial p:not(.eyebrow) {
  margin: 18px 0 28px;
  line-height: 1.9;
  color: var(--muted);
}
.load-error {
  max-width: 600px;
  padding: 40px;
  margin: 10vh auto;
}
.load-error button {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-top: 20px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
@media (max-width: 1200px) {
  .concept-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .anatomy-layout {
    grid-template-columns: minmax(0, 1fr) 265px;
  }
  .lab-layout {
    grid-template-columns: minmax(0, 1fr) 290px;
  }
  .article-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 20px;
  }
  .article {
    padding: 26px;
  }
  .quiz-layout {
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 22px;
  }
  .question-card {
    padding: 27px;
  }
  .quick-card {
    padding: 17px 13px;
    gap: 10px;
  }
  .quick-card small {
    font-size: 0.69rem;
  }
  .quick-card strong {
    font-size: 0.86rem;
  }
  .quick-icon {
    width: 37px;
    height: 37px;
  }
  .quick-card b {
    display: none;
  }
  .stat-card {
    padding: 19px;
  }
  .stat-card > span {
    font-size: 0.75rem;
  }
  .stat-card strong {
    font-size: 1.8rem;
  }
  .sources-layout {
    grid-template-columns: 1.5fr 1fr;
  }
}
@media (max-width: 1000px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-tools {
    position: static;
    grid-template-columns: 1fr 1fr;
  }
  .anatomy-layout {
    grid-template-columns: 1fr;
  }
  .anatomy-stage {
    position: relative;
    top: auto;
  }
  .anatomy-panel {
    grid-template-columns: 1fr 1fr;
  }
  .anatomy-panel > .card:last-child {
    grid-column: 1/-1;
  }
  .part-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 20px;
  }
  .body-model {
    height: 520px;
  }
  .lab-layout {
    grid-template-columns: 1fr;
  }
  .lab-explanation {
    grid-template-columns: 1fr 1fr;
  }
  .lab-explanation > .card:last-child {
    grid-column: 1/-1;
  }
  .progress-layout,
  .settings-grid {
    grid-template-columns: 1fr;
  }
  .quiz-layout {
    grid-template-columns: 1fr;
  }
  .quiz-side {
    display: none;
  }
  .sources-layout {
    grid-template-columns: 1fr;
  }
  .sources-layout > aside {
    padding-top: 0;
    grid-template-columns: 1fr 1fr;
  }
  .year-tabs button {
    padding: 18px 12px;
    gap: 10px;
  }
  .year-tabs b {
    font-size: 1.5rem;
  }
  .school-strip .school-mark {
    display: none;
  }
  .school-strip a {
    white-space: normal;
    min-width: 75px;
  }
  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
  .curriculum-intro {
    display: block;
  }
  .curriculum-intro a {
    margin-top: 15px;
  }
  .hero-grid .mission {
    min-height: 350px;
  }
}
@media (max-width: 760px) {
  .daily-ring {
    width: 84px;
    height: 84px;
    border-width: 5px;
  }
  .daily-ring strong {
    font-size: 1.4rem;
  }
  .daily-ring span {
    font-size: 0.6rem;
  }
  .daily-ring small {
    font-size: 0.63rem;
  }
  .hero-grid .mission {
    min-height: 295px;
  }
  .body-preview {
    height: 240px;
  }
  .lab-preview .card-head {
    margin-bottom: 5px;
  }
  .quick-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin: 17px 0;
  }
  .quick-card {
    padding: 15px 18px;
    gap: 16px;
  }
  .quick-icon {
    width: 40px;
    height: 40px;
  }
  .quick-card strong {
    font-size: 0.94rem;
  }
  .quick-card small {
    font-size: 0.77rem;
  }
  .quick-card b {
    display: block;
  }
  .quick-card span:nth-child(2) {
    display: flex;
    align-items: center;
    gap: 18px;
  }
  .quick-card small {
    margin-top: 0;
  }
  .school-strip {
    padding: 18px;
    gap: 12px;
    align-items: start;
  }
  .school-strip strong {
    font-size: 0.86rem;
    line-height: 1.7;
  }
  .school-strip p {
    font-size: 0.77rem;
  }
  .school-strip a {
    font-size: 0.74rem;
    line-height: 1.8;
  }
  .concept-grid {
    gap: 12px;
  }
  .concept-card {
    padding: 18px;
  }
  .concept-card .tag {
    font-size: 0.68rem;
    padding: 4px 7px;
  }
  .concept-card h3 {
    font-size: 1rem;
    margin-top: 17px;
  }
  .concept-card p {
    font-size: 0.82rem;
  }
  .concept-card-foot {
    font-size: 0.67rem;
    flex-direction: column;
  }
  .section-head h2 {
    font-size: 1.08rem;
  }
  .section-head > a,
  .section-head > button {
    font-size: 0.76rem;
  }
  .filter-panel {
    padding: 15px;
  }
  .filter-row {
    gap: 9px;
  }
  .filter-row select {
    font-size: 0.84rem;
    flex: 1;
    min-width: 135px;
    max-width: 100%;
  }
  .filter-row .spacer {
    display: none;
  }
  .search-box input {
    font-size: 0.95rem;
  }
  .article {
    padding: 23px 20px;
    border-radius: 17px;
  }
  .article-head h1 {
    font-size: 1.6rem;
  }
  .article-summary {
    font-size: 0.98rem;
    padding-left: 15px;
  }
  .article-section p {
    font-size: 1rem;
    line-height: 2;
  }
  .article-figure {
    padding: 12px;
  }
  .article-section h2 {
    font-size: 1.13rem;
  }
  .connections {
    padding: 20px;
  }
  .article-tools {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  .article-tools .card:first-child {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .article-tools .card:first-child .eyebrow,
  .article-tools .card:first-child h3,
  .article-tools .card:first-child .note {
    width: 100%;
  }
  .article-tools .full {
    flex: 1;
    min-width: 45%;
    margin-top: 5px;
  }
  .article-tools .card:nth-child(2) .external-link {
    margin-top: 13px;
  }
  .article-breadcrumb {
    font-size: 0.77rem;
    gap: 8px;
  }
  .quiz-top {
    gap: 15px;
    margin-bottom: 20px;
  }
  .quiz-top .text-link {
    font-size: 0.78rem;
  }
  .question-card {
    padding: 23px 18px;
    border-radius: 18px;
  }
  .question-card h1 {
    font-size: 1.22rem;
    margin-top: 22px;
    line-height: 1.8;
  }
  .choice {
    font-size: 0.94rem;
    padding: 16px 13px;
    gap: 11px;
  }
  .choice-key {
    width: 27px;
    height: 27px;
    font-size: 0.76rem;
  }
  .confidence {
    gap: 6px;
  }
  .confidence button {
    font-size: 0.75rem;
    padding: 10px 7px;
  }
  .confidence legend {
    font-size: 0.78rem;
  }
  .confidence legend small {
    display: block;
    margin: 7px 0 0;
  }
  .answer-feedback {
    padding: 20px;
  }
  .answer-feedback p {
    font-size: 0.93rem;
  }
  .answer-feedback h2 {
    font-size: 1.07rem;
  }
  .quiz-model {
    height: 430px;
  }
  .quest-complete {
    padding: 32px 20px;
  }
  .quest-complete h1 {
    font-size: 1.35rem;
  }
  .result-grid {
    gap: 8px;
    margin: 26px 0;
  }
  .result-grid > div {
    padding: 19px 7px;
  }
  .result-grid strong {
    font-size: 1.55rem;
  }
  .result-grid strong small {
    font-size: 0.75rem;
  }
  .result-grid span {
    font-size: 0.72rem;
  }
  .quest-complete .row {
    gap: 10px;
  }
  .quest-complete .row a {
    width: 100%;
  }
  .intro-row > .secondary {
    font-size: 0.74rem;
    padding: 10px;
    gap: 5px;
    min-height: 42px;
    white-space: nowrap;
  }
  .intro-row > .secondary svg {
    width: 14px;
  }
  .anatomy-stage {
    padding: 17px;
    border-radius: 18px;
  }
  .model-heading {
    font-size: 0.6rem;
    letter-spacing: 0.03em;
  }
  .model-heading .tag {
    font-size: 0.63rem;
  }
  .body-model {
    height: 480px;
  }
  .model-toolbar {
    gap: 5px;
  }
  .model-toolbar button {
    padding: 9px 8px;
    font-size: 0.76rem;
    min-width: 37px;
  }
  .anatomy-panel {
    grid-template-columns: 1fr;
  }
  .anatomy-panel > .card:last-child {
    grid-column: auto;
  }
  .layer-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px 8px;
  }
  .layer-list label {
    font-size: 0.83rem;
    gap: 5px;
  }
  .part-list {
    max-height: 240px;
  }
  .anatomy-stage > .note {
    font-size: 0.72rem;
  }
  .lab-workspace {
    padding: 22px 18px;
    border-radius: 18px;
  }
  .lab-tabs button {
    font-size: 0.79rem;
    padding: 12px 13px;
  }
  .scenario-tabs {
    gap: 6px;
  }
  .scenario-tabs button {
    font-size: 0.73rem;
    padding: 10px 9px;
  }
  .trigger-box {
    padding: 15px 12px;
    gap: 10px;
  }
  .trigger-box strong {
    font-size: 0.87rem;
  }
  .mechanism-flow {
    padding: 0 5px;
  }
  .mechanism-node {
    padding: 16px 13px;
    gap: 5px 10px;
  }
  .mechanism-node strong {
    font-size: 0.93rem;
  }
  .node-detail {
    font-size: 0.84rem;
  }
  .lab-result {
    padding: 17px;
    font-size: 0.84rem;
  }
  .lab-workspace > .row {
    gap: 8px;
  }
  .lab-workspace .primary,
  .lab-workspace .secondary {
    font-size: 0.82rem;
    padding: 13px 16px;
    flex: 1;
  }
  .lab-explanation {
    grid-template-columns: 1fr;
  }
  .lab-explanation > .card:last-child {
    grid-column: auto;
  }
  .video-grid {
    grid-template-columns: 1fr;
  }
  .curriculum-intro p {
    font-size: 0.88rem;
  }
  .year-tabs {
    gap: 8px;
  }
  .year-tabs button {
    padding: 15px 10px;
    flex-direction: column;
    align-items: start;
    gap: 10px;
  }
  .year-tabs b {
    font-size: 1.35rem;
  }
  .year-tabs span {
    font-size: 0.88rem;
  }
  .year-tabs small {
    font-size: 0.63rem;
    line-height: 1.6;
  }
  .school-info h2 {
    font-size: 1.09rem;
    line-height: 1.8;
  }
  .route-steps div {
    font-size: 0.77rem;
  }
  .domain-block {
    padding: 0 17px;
  }
  .domain-block > summary {
    gap: 12px;
  }
  .domain-no {
    width: 31px;
    height: 31px;
    flex-shrink: 0;
    font-size: 0.72rem;
    border-radius: 9px;
  }
  .domain-block summary strong {
    font-size: 0.94rem;
  }
  .domain-block summary small {
    font-size: 0.7rem;
  }
  .domain-count {
    font-size: 0.7rem;
  }
  .curriculum-unit p {
    font-size: 0.8rem;
  }
  .unit-links a {
    font-size: 0.75rem;
  }
  .stat-card {
    padding: 20px;
  }
  .stat-card > span {
    font-size: 0.75rem;
    line-height: 1.6;
  }
  .stat-card strong {
    font-size: 1.9rem;
    margin-top: 12px;
  }
  .history-list {
    grid-template-columns: 1fr;
  }
  .history-row {
    gap: 10px;
    flex-wrap: wrap;
  }
  .history-row small {
    width: 100%;
    margin-left: 0;
    font-size: 0.72rem;
  }
  .scope-items {
    grid-template-columns: 1fr;
    max-height: 390px;
  }
  .scope-card {
    align-items: start;
    flex-direction: column;
    padding: 21px;
  }
  .scope-card .primary {
    width: 100%;
  }
  .form-grid {
    gap: 12px;
  }
  .sources-layout > aside {
    grid-template-columns: 1fr;
  }
  .sources-layout .source-list {
    font-size: 0.8rem;
  }
  .source-list a {
    overflow-wrap: anywhere;
  }
  .scope-summary p {
    font-size: 0.92rem;
  }
  .scope-summary .note {
    font-size: 0.8rem;
  }
  .learning-footer {
    gap: 13px;
    font-size: 0.73rem;
  }
  .map-mobile {
    display: block;
    color: var(--muted);
  }
  .topbar > .row {
    gap: 13px;
  }
  .topbar .avatar {
    width: 29px;
    height: 29px;
    font-size: 0.8rem;
  }
  .topbar .profile-badge {
    gap: 7px;
    font-size: 0.71rem;
  }
  .profile-badge span:last-child {
    max-width: 130px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .modal {
    padding: 28px;
  }
  .sources-detail {
    padding: 17px;
  }
  .note {
    font-size: 0.81rem;
  }
  .scope-summary {
    padding: 23px;
  }
  .coverage-pending {
    font-size: 0.74rem;
    line-height: 1.8;
  }
}
@media (max-width: 380px) {
  .concept-grid,
  .subject-grid {
    grid-template-columns: 1fr;
  }
  .daily-ring {
    display: none;
  }
  .quick-card span:nth-child(2) {
    gap: 10px;
  }
  .topbar .profile-badge span:last-child {
    max-width: 85px;
  }
  .page {
    padding-left: 14px;
    padding-right: 14px;
  }
  .confidence button {
    font-size: 0.7rem;
  }
  .body-model {
    height: 430px;
  }
  .layer-list {
    grid-template-columns: 1fr 1fr;
  }
}

.self-assessment {
  padding: 22px;
  background: #edf7f3;
  border: 1px solid #b7d7cb;
  border-radius: 16px;
  margin: 20px 0;
}
.self-assessment .stack {
  gap: 9px;
}
textarea.answer-input {
  min-height: 150px;
  width: 100%;
  line-height: 1.8;
}
.article-return {
  display: inline-flex;
  margin: 8px 0 15px;
}
.mobile-layers {
  display: none;
}
@media (max-width: 760px) {
  .mobile-layers {
    display: block;
    padding: 0 8px 12px;
  }
  .mobile-layers .layer-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .mobile-layers label {
    font-size: 13px;
    padding: 5px 0;
  }
  .anatomy-panel .layer-card {
    display: none;
  }
}

@media (max-width: 760px) {
  .body-model {
    height: 360px;
  }
  .quiz-model {
    height: 340px;
  }
}