/* Locally hosted type;
no external font requests or tracking. */
@font-face {
  font-family:Inter;
  src:url('../fonts/inter-latin.woff2') format('woff2');
  font-style:normal;
  font-weight:100 900;
  font-display:swap
}
@font-face {
  font-family:Caveat;
  src:url('../fonts/caveat-semibold.ttf') format('truetype');
  font-style:normal;
  font-weight:600;
  font-display:swap
}
:root {
  --ink:#172b4d;
  --ink-2:#354764;
  --muted:#58657b;
  --paper:#f6f4ed;
  --surface:#fffef9;
  --surface-2:#edece4;
  --line:#d9dcd9;
  --line-strong:#abb5bf;
  --teal:#315aca;
  --teal-dark:#234cb8;
  --teal-soft:#e6edff;
  --coral:#315aca;
  --coral-dark:#234cb8;
  --blue:#274c99;
  --blue-soft:#e8effc;
  --green-soft:#e1f2e9;
  --gold-soft:#fff2ba;
  --coral-soft:#fbe8ec;
  --radius:12px;
  --radius-small:7px;
  --shadow-small:0 3px 0 #172b4d06;
  --font-serif:Inter,system-ui,sans-serif;
  --note-blue:#e8effc;
  --note-mint:#e1f2e9;
  --note-pink:#fbe8ec;
  --note-yellow:#fff2ba;
  --dot:#c8cdd04d;
  --highlighter:#f4dc77;
  --notebook-rule:#a6c0d82e
}
html[data-theme=dark] {
  --ink:#e8edf9;
  --ink-2:#c5d1e8;
  --muted:#a2b1c9;
  --paper:#141c2c;
  --surface:#1c273b;
  --surface-2:#25334a;
  --line:#35445d;
  --line-strong:#617491;
  --teal:#a6bfff;
  --teal-dark:#bdd0ff;
  --teal-soft:#273f6a;
  --on-accent:#111e38;
  --coral:#a6bfff;
  --coral-dark:#bdd0ff;
  --blue:#a7c2ff;
  --blue-soft:#263957;
  --green-soft:#213d38;
  --gold-soft:#403c28;
  --coral-soft:#433042;
  --note-blue:#253b5c;
  --note-mint:#233e39;
  --note-pink:#433042;
  --note-yellow:#403c28;
  --dot:#adc4e016;
  --highlighter:#5d522c;
  --notebook-rule:#869fc21c;
  --shadow-small:none
}
body {
  background-image:radial-gradient(var(--dot) 1px,transparent 1px);
  background-size:18px 18px;
  font-size:15px
}
body::before {
  display:none
}
h1,h2 {
  font-weight:650;
  letter-spacing:-.045em
}
h2 {
  font-size:clamp(1.55rem,3vw,2.35rem)
}
.site-header {
  backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--paper) 95%,transparent)
}
.brand img {
  filter:none
}
.brand small {
  letter-spacing:.13em
}
.primary-nav a {
  font-size:.8rem
}
.primary-nav a[aria-current=page] {
  box-shadow:inset 0 -2px var(--teal)
}
.button {
  border-radius:7px;
  font-size:.86rem;
  font-weight:650;
  box-shadow:none;
  transition:none
}
.button:hover:not(:disabled) {
  transform:none
}
.eyebrow {
  font-size:.66rem;
  letter-spacing:.14em;
  font-weight:700
}
.page-shell {
  padding-top:48px
}
.page-heading h1 {
  font-size:clamp(2.5rem,5vw,4rem)
}
.site-footer {
  font-size:.8rem
}
.handwritten {
  font-family:Caveat,cursive;
  font-size:1.7rem;
  font-weight:600;
  line-height:1.2
}
.notebook-shell {
  max-width:1180px;
  width:calc(100% - 64px);
  margin:0 auto;
  padding:30px 0 72px
}
.notebook-topline {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding-bottom:24px;
  border-bottom:1px solid var(--line);
  font-size:.7rem
}
.course-label {
  letter-spacing:.15em;
  color:var(--muted);
  font-weight:650
}
.notebook-topline a {
  color:var(--muted);
  text-decoration:none
}
.notebook-hero {
  display:grid;
  grid-template-columns:.92fr 1.08fr;
  align-items:center;
  gap:55px;
  padding:64px 0 58px
}
.notebook-intro h1 {
  font-size:clamp(2.8rem,4.6vw,4.2rem);
  line-height:1.08;
  margin-bottom:24px
}
.notebook-intro>p:not(.eyebrow):not(.margin-note) {
  max-width:440px;
  color:var(--ink-2);
  font-size:1rem;
  line-height:1.8
}
.ink-highlight {
  background:linear-gradient(transparent 63%,var(--highlighter) 63%,var(--highlighter) 93%,transparent 93%)
}
.notebook-intro .button-row {
  margin-top:28px;
  gap:20px
}
.text-link {
  font-size:.84rem;
  font-weight:600
}
.margin-note {
  color:var(--muted);
  font-size:1.45rem;
  transform:rotate(-3deg);
  margin:27px 0 0 7px
}
.notebook-cover {
  margin:0;
  position:relative;
  background:#fffdf4;
  border:1px solid #cbd1ce;
  box-shadow:5px 6px 0 var(--surface-2);
  transform:rotate(1deg)
}
.notebook-cover::before {
  content:"";
  position:absolute;
  width:100px;
  height:26px;
  top:-13px;
  left:41%;
  background:#ead9a8b5;
  transform:rotate(-5deg);
  z-index:1
}
.notebook-cover img {
  display:block;
  width:100%;
  height:auto
}
.notebook-cover figcaption {
  display:flex;
  justify-content:space-between;
  gap:10px;
  border-top:1px solid #dde0da;
  padding:13px 17px;
  color:#283b5c;
  font-size:.57rem;
  letter-spacing:.13em;
  font-weight:700
}
.notebook-cover figcaption span {
  font-weight:400;
  letter-spacing:0;
  font-size:.68rem
}
.study-desk {
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:45px;
  border-top:1px solid var(--line);
  padding:38px 0 48px
}
.next-note {
  position:relative;
  background:var(--note-yellow);
  padding:30px 34px 28px;
  border:1px solid color-mix(in srgb,var(--gold) 20%,var(--line));
  border-radius:3px 3px 22px 3px
}
.paper-tab {
  display:inline-block;
  position:absolute;
  right:22px;
  top:-13px;
  padding:5px 12px;
  background:var(--ink);
  color:var(--paper);
  font-size:.58rem;
  letter-spacing:.12em;
  font-weight:650;
  transform:rotate(2deg)
}
.next-note h2 {
  font-size:1.9rem;
  margin-bottom:12px
}
.next-note>p:not(.eyebrow) {
  font-size:.89rem;
  max-width:470px;
  color:var(--ink-2)
}
.next-note .button {
  margin-top:6px
}
.desk-tools {
  display:grid
}
.desk-tools>a {
  display:grid;
  grid-template-columns:85px 1fr;
  align-content:center;
  gap:3px 15px;
  padding:17px 0;
  border-bottom:1px solid var(--line);
  text-decoration:none;
  color:var(--ink)
}
.desk-tools>a:last-child {
  border-bottom:0
}
.tool-index {
  grid-row:span 2;
  font-size:.6rem;
  letter-spacing:.08em;
  color:var(--muted);
  padding-top:5px
}
.desk-tools strong {
  font-size:.96rem;
  font-weight:650
}
.desk-tools>a>span:last-child {
  font-size:.77rem;
  color:var(--muted)
}
.chapter-section {
  padding:24px 0 40px
}
.section-heading>a {
  font-size:.8rem
}
.chapter-cards {
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:13px
}
.note-blue {
  --note:var(--note-blue)
}
.note-mint {
  --note:var(--note-mint)
}
.note-pink {
  --note:var(--note-pink)
}
.note-yellow {
  --note:var(--note-yellow)
}
.chapter-card {
  display:block;
  position:relative;
  padding:20px 17px 15px;
  background:var(--note);
  border:1px solid var(--line);
  border-radius:5px;
  text-decoration:none;
  color:var(--ink)
}
.chapter-card:hover {
  border-color:var(--teal);
  color:var(--ink)
}
.chapter-letter {
  font:600 2.8rem/1 Caveat,cursive;
  display:block;
  margin-bottom:30px
}
.chapter-weight {
  position:absolute;
  top:27px;
  right:14px;
  font-size:.58rem;
  color:var(--muted)
}
.chapter-card h3 {
  font-size:1rem;
  font-weight:650;
  margin-bottom:8px;
  letter-spacing:-.025em
}
.chapter-card p {
  font-size:.74rem;
  line-height:1.5;
  color:var(--ink-2);
  min-height:36px
}
.chapter-bottom {
  display:flex;
  justify-content:space-between;
  font-size:.65rem;
  border-top:1px solid color-mix(in srgb,var(--ink) 13%,transparent);
  padding-top:12px
}
.enough-note {
  display:grid;
  grid-template-columns:200px 1fr;
  gap:45px;
  padding:35px 0 0;
  border-top:1px solid var(--line)
}
.enough-note>.handwritten {
  transform:rotate(-5deg);
  color:var(--teal-dark)
}
.enough-note h2 {
  font-size:1.2rem;
  letter-spacing:-.02em
}
.enough-note p {
  max-width:770px;
  font-size:.83rem
}
.enough-note .muted {
  font-size:.73rem;
  margin-bottom:0
}
.course-shell {
  max-width:960px
}
.notebook-page-heading {
  padding:35px 0 25px;
  max-width:720px
}
.notebook-page-heading h1 {
  font-size:clamp(2.6rem,5vw,4.1rem);
  margin-bottom:20px
}
.notebook-page-heading>p:not(.eyebrow) {
  color:var(--ink-2)
}
.course-progress {
  display:flex;
  align-items:center;
  gap:20px;
  font-size:.77rem;
  margin:24px 0 14px
}
.course-progress progress {
  height:7px;
  width:240px;
  accent-color:var(--teal-dark)
}
.small-note {
  font-size:.77rem;
  line-height:1.7;
  max-width:640px
}
.chapter-tabs {
  display:flex;
  gap:12px;
  border-bottom:1px solid var(--line);
  padding:12px 0 25px;
  flex-wrap:wrap
}
.chapter-tabs a {
  background:var(--surface);
  padding:8px 13px;
  border:1px solid var(--line);
  border-radius:6px;
  font-size:.75rem;
  text-decoration:none;
  color:var(--ink);
  font-weight:650
}
.chapter-tabs a span {
  font-weight:400;
  margin-left:4px
}
.course-chapter {
  padding:40px 0 25px;
  scroll-margin-top:90px
}
.course-chapter>header {
  display:flex;
  gap:22px;
  align-items:center;
  margin-bottom:20px
}
.chapter-stamp {
  display:grid;
  place-items:center;
  width:60px;
  height:62px;
  background:var(--note);
  border:1px solid var(--line);
  font:600 2.5rem Caveat,cursive;
  border-radius:4px;
  transform:rotate(-3deg)
}
.course-chapter h2 {
  margin:0;
  font-size:1.85rem
}
.notebook-session-list {
  padding:0;
  margin:0;
  list-style:none;
  border:1px solid var(--line);
  border-radius:8px;
  overflow:hidden;
  background:var(--surface)
}
.notebook-session-list li+li {
  border-top:1px solid var(--line)
}
.notebook-session-list a {
  display:grid;
  grid-template-columns:40px 1fr 100px;
  gap:16px;
  align-items:center;
  padding:20px 24px;
  text-decoration:none;
  color:var(--ink)
}
.notebook-session-list a:hover {
  background:var(--surface-2)
}
.session-number {
  font:600 1.5rem Caveat,cursive;
  color:var(--muted)
}
.session-copy {
  display:grid;
  gap:4px
}
.session-copy strong {
  font-weight:600;
  font-size:.94rem
}
.session-copy>span {
  font-size:.76rem;
  color:var(--muted);
  line-height:1.6;
  max-width:590px
}
.session-state {
  font-size:.65rem;
  text-align:right;
  color:var(--muted)
}
.session-state.done,.session-state.known {
  color:var(--teal-dark)
}
.session-state.revisit {
  color:var(--gold)
}
.chapter-finish {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  padding:20px 25px;
  background:var(--surface-2);
  border-radius:0 0 6px 6px
}
.chapter-finish a {
  display:grid;
  text-decoration:none;
  color:var(--ink)
}
.chapter-finish .eyebrow {
  font-size:.58rem
}
.chapter-finish strong {
  font-size:.78rem;
  font-weight:600
}
.notebook-reference {
  margin-top:40px;
  padding:30px;
  border:1px dashed var(--line-strong);
  background:var(--surface)
}
.notebook-reference h2 {
  font-size:1.5rem
}
.notebook-reference p {
  font-size:.85rem
}
.notebook-reference>.button-row {
  margin:20px 0
}
.notebook-reference>.button-row>a:not(.button) {
  font-size:.8rem
}
.notebook-reference>p:last-child {
  font-size:.73rem;
  margin:25px 0 0
}
.session-shell {
  max-width:1060px
}
.notebook-breadcrumb {
  display:flex;
  justify-content:space-between;
  font-size:.75rem;
  margin:0 0 30px
}
.notebook-breadcrumb>span {
  font-size:.62rem;
  letter-spacing:.15em;
  color:var(--muted)
}
.study-page {
  position:relative;
  border:1px solid var(--line);
  border-radius:4px;
  background:var(--surface);
  box-shadow:5px 5px 0 var(--surface-2);
  padding:45px 54px 35px;
  border-left:4px solid var(--blue)
}
.study-page-heading h1 {
  font:600 clamp(2.6rem,5.2vw,4.2rem)/1.05 Caveat,cursive;
  letter-spacing:-.015em;
  margin-bottom:24px
}
.big-idea {
  font-size:1.13rem;
  line-height:1.8;
  max-width:760px;
  color:var(--ink-2);
  margin-bottom:28px
}
.page-tabs {
  display:flex;
  gap:23px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:15px 0
}
.page-tabs a {
  text-decoration:none;
  font-size:.76rem;
  color:var(--ink-2);
  font-weight:550
}
.notebook-section {
  padding:32px 0 6px;
  scroll-margin-top:85px
}
.note-section-title {
  display:flex;
  gap:17px;
  align-items:center;
  margin-bottom:22px
}
.note-section-title>.handwritten {
  font-size:1.7rem;
  color:var(--teal-dark)
}
.note-section-title h2 {
  font-size:1.32rem;
  margin:0;
  letter-spacing:-.025em
}
.idea-tiles {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:15px
}
.idea-tile {
  background:var(--note);
  border:1px solid color-mix(in srgb,var(--ink) 12%,transparent);
  border-radius:4px 8px 5px 7px;
  padding:21px 22px 23px;
  position:relative
}
.tile-number {
  display:block;
  font:600 1.5rem Caveat,cursive;
  color:var(--muted);
  margin-bottom:17px
}
.idea-tile h3 {
  font-size:1.06rem;
  line-height:1.35;
  margin-bottom:12px
}
.idea-tile p {
  font-size:.84rem;
  line-height:1.85;
  margin-bottom:0;
  color:var(--ink-2)
}
.concept-image {
  margin:0 0 25px;
  max-width:760px
}
.concept-image img {
  display:block;
  width:100%;
  height:auto;
  border:1px solid var(--line);
  border-radius:4px
}
.concept-image figcaption {
  font-size:.68rem;
  color:var(--muted);
  padding-top:7px
}
.scenario-note {
  position:relative;
  background:repeating-linear-gradient(transparent,transparent 31px,var(--notebook-rule) 31px,var(--notebook-rule) 32px),var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--teal);
  padding:27px 28px 20px;
  border-radius:3px
}
.scenario-note>p {
  font-size:1rem;
  line-height:2;
  margin:4px 0 20px
}
.answer-reveal summary {
  font-size:.8rem;
  color:var(--teal-dark);
  font-weight:600;
  cursor:pointer
}
.answer-reveal>div {
  padding-top:14px
}
.answer-reveal p {
  font-size:.87rem;
  line-height:1.9;
  margin:0
}
.trap-note {
  background:var(--note-pink);
  padding:20px 25px;
  margin-top:18px;
  border-radius:4px;
  display:grid;
  grid-template-columns:175px 1fr;
  gap:23px;
  align-items:center
}
.trap-note strong {
  font-size:1.65rem;
  transform:rotate(-3deg)
}
.trap-note p {
  font-size:.83rem;
  line-height:1.8;
  margin:0
}
.section-intro {
  font-size:.82rem;
  color:var(--muted);
  margin-top:-6px
}
.notebook-recall {
  display:grid;
  gap:10px
}
.notebook-recall details {
  border:1px solid var(--line);
  border-radius:5px;
  background:var(--paper)
}
.notebook-recall summary {
  padding:17px 20px;
  font-size:.88rem;
  font-weight:550;
  cursor:pointer;
  list-style:none;
  display:flex;
  align-items:baseline;
  gap:15px
}
.notebook-recall summary::-webkit-details-marker {
  display:none
}
.notebook-recall summary>span {
  font:600 1.4rem Caveat,cursive;
  color:var(--teal-dark)
}
.notebook-recall summary::after {
  content:'+';
  margin-left:auto;
  color:var(--muted)
}
.notebook-recall details[open] summary::after {
  content:'−'
}
.notebook-recall details>div {
  padding:5px 20px 20px 46px;
  font-size:.83rem;
  line-height:1.85
}
.notebook-recall details>div>a {
  font-size:.72rem
}
.practice-links {
  display:grid;
  gap:8px;
  margin-bottom:18px
}
.practice-links>a {
  display:grid;
  grid-template-columns:53px 1fr 16px;
  gap:12px;
  padding:13px 16px;
  border:1px solid var(--line);
  border-radius:5px;
  font-size:.72rem;
  text-decoration:none;
  align-items:center
}
.practice-links>a>strong {
  font-size:.8rem;
  font-weight:500;
  line-height:1.6;
  color:var(--ink)
}
.session-finish {
  background:var(--note-mint);
  border:1px solid var(--line);
  padding:27px 30px 18px;
  margin:35px 0 26px;
  border-radius:5px
}
.session-finish h2 {
  font:600 2.2rem Caveat,cursive;
  margin-bottom:14px
}
.session-finish>p:not(.eyebrow) {
  font-size:.77rem;
  max-width:660px
}
.session-finish .button-row {
  gap:14px
}
.session-finish [data-notebook-feedback] {
  min-height:1.7em;
  margin:15px 0 0;
  font-size:.8rem
}
.session-finish button[aria-pressed=true] {
  outline:2px solid var(--teal);
  outline-offset:3px
}
.optional-reference {
  border-top:1px solid var(--line);
  padding:19px 0;
  color:var(--ink-2)
}
.optional-reference>summary {
  font-size:.85rem;
  font-weight:550;
  cursor:pointer
}
.optional-reference>p {
  font-size:.78rem;
  margin-top:15px
}
.reference-entry {
  padding:15px 0;
  border-bottom:1px solid var(--line);
  font-size:.77rem
}
.reference-entry:last-child {
  border:0
}
.reference-entry p {
  margin:14px 0;
  font-size:.78rem
}
.reference-lab {
  display:inline-block;
  margin:12px 12px 0 0;
  font-size:.73rem
}
.notes-drawer .personal-notes {
  margin-top:22px;
  box-shadow:none
}
.session-pagination {
  display:flex;
  gap:25px;
  justify-content:space-between;
  margin-top:32px
}
.session-pagination a {
  display:grid;
  gap:8px;
  text-decoration:none;
  max-width:45%
}
.session-pagination a:last-child {
  text-align:right
}
.session-pagination span {
  font-size:.58rem;
  letter-spacing:.1em;
  color:var(--muted)
}
.session-pagination strong {
  font-size:.83rem;
  font-weight:550
}
.reference-banner {
  border:1px solid var(--line);
  border-left:4px solid var(--teal);
  border-radius:5px;
  background:var(--note-yellow);
  padding:16px 20px;
  margin-bottom:25px;
  font-size:.86rem
}
.reference-banner p {
  margin:6px 0 0;
  color:var(--ink-2);
  font-size:.78rem
}
.reference-banner a {
  font-weight:600
}
.card,.question-card,.quiz-config {
  box-shadow:none
}
.practice-mode {
  border-radius:7px
}
.practice-mode.is-active {
  background:var(--note-blue)
}
.practice-mode>span {
  font-family:Caveat,cursive
}
.lesson-hero h1 {
  font-size:clamp(2rem,4vw,3.2rem)
}
@media(min-width:1500px) {
  .notebook-shell {
    padding-top:40px
  }
  .notebook-hero {
    padding-top:75px;
    padding-bottom:70px
  }
}
@media(max-width:1100px) {
  .notebook-hero {
    gap:30px
  }
  .notebook-intro h1 {
    font-size:3rem
  }
  .chapter-cards {
    grid-template-columns:repeat(3,1fr)
  }
  .chapter-card {
    min-height:200px
  }
  .chapter-card:nth-last-child(-n+2) {
    min-height:180px
  }
  .study-page {
    padding:35px
  }
  .idea-tile {
    padding:20px 16px
  }
  .header-inner {
    gap:12px
  }
  .primary-nav a {
    padding:.55rem .5rem
  }
}
@media(max-width:760px) {
  .notebook-shell {
    width:calc(100% - 32px);
    padding-top:22px
  }
  .notebook-topline {
    font-size:.63rem;
    padding-bottom:20px
  }
  .course-label {
    font-size:.58rem;
    letter-spacing:.08em
  }
  .notebook-hero {
    grid-template-columns:1fr;
    padding:36px 0 38px;
    gap:35px
  }
  .notebook-intro h1 {
    font-size:3.15rem
  }
  .notebook-intro>p:not(.eyebrow):not(.margin-note) {
    max-width:540px
  }
  .notebook-cover {
    max-width:520px;
    margin:0 auto;
    width:calc(100% - 12px)
  }
  .margin-note {
    font-size:1.45rem
  }
  .study-desk {
    grid-template-columns:1fr;
    gap:14px;
    padding-bottom:27px
  }
  .next-note {
    padding:27px
  }
  .next-note h2 {
    font-size:1.6rem
  }
  .desk-tools>a {
    padding:18px 5px
  }
  .chapter-cards {
    grid-template-columns:repeat(2,1fr);
    gap:12px
  }
  .chapter-card {
    min-height:0
  }
  .chapter-card:last-child {
    grid-column:1/-1;
    min-height:0
  }
  .chapter-card:last-child .chapter-letter {
    margin-bottom:18px
  }
  .chapter-card:last-child p {
    min-height:0
  }
  .chapter-card:nth-last-child(-n+2) {
    min-height:0
  }
  .chapter-section .section-heading {
    gap:14px
  }
  .chapter-section .section-heading>a {
    white-space:normal;
    max-width:90px;
    font-size:.72rem
  }
  .enough-note {
    grid-template-columns:1fr;
    gap:15px;
    padding-top:25px
  }
  .enough-note>.handwritten {
    transform:none
  }
  .notebook-page-heading {
    padding-top:22px
  }
  .notebook-page-heading h1 {
    font-size:2.8rem
  }
  .chapter-tabs {
    gap:7px
  }
  .chapter-tabs a {
    font-size:.68rem;
    padding:7px 9px
  }
  .notebook-session-list a {
    grid-template-columns:25px 1fr;
    gap:8px 12px;
    padding:18px
  }
  .session-state {
    grid-column:2;
    text-align:left
  }
  .session-copy>span {
    font-size:.74rem
  }
  .chapter-finish {
    padding:18px;
    gap:18px
  }
  .chapter-finish strong {
    font-size:.74rem
  }
  .course-chapter>header {
    gap:15px
  }
  .course-chapter h2 {
    font-size:1.65rem
  }
  .course-chapter .eyebrow {
    font-size:.56rem
  }
  .notebook-reference {
    padding:23px
  }
  .study-page {
    padding:27px 20px 16px;
    border-left-width:3px
  }
  .study-page-heading h1 {
    font-size:2.8rem
  }
  .big-idea {
    font-size:1rem;
    line-height:1.8
  }
  .page-tabs {
    gap:17px;
    flex-wrap:wrap;
    padding:13px 0
  }
  .page-tabs a {
    font-size:.68rem
  }
  .idea-tiles {
    grid-template-columns:1fr;
    gap:13px
  }
  .idea-tile {
    padding:20px 22px
  }
  .tile-number {
    float:right;
    margin:0 0 6px 15px
  }
  .idea-tile h3 {
    font-size:1.05rem
  }
  .idea-tile p {
    font-size:.86rem
  }
  .note-section-title h2 {
    font-size:1.15rem;
    line-height:1.4
  }
  .note-section-title {
    gap:12px
  }
  .scenario-note {
    padding:23px 19px 19px
  }
  .scenario-note .paper-tab {
    font-size:.5rem;
    right:10px
  }
  .scenario-note>p {
    font-size:.93rem;
    line-height:1.9
  }
  .trap-note {
    grid-template-columns:1fr;
    gap:10px;
    padding:20px
  }
  .trap-note strong {
    transform:none;
    font-size:1.65rem
  }
  .notebook-recall summary {
    padding:14px;
    font-size:.84rem;
    gap:11px
  }
  .notebook-recall details>div {
    padding:0 15px 17px 36px
  }
  .session-finish {
    padding:22px 20px 16px
  }
  .session-finish .button-row {
    align-items:flex-start
  }
  .practice-links>a {
    grid-template-columns:1fr 16px;
    gap:4px 8px
  }
  .practice-links>a>span:first-child {
    grid-column:1/-1;
    font-size:.64rem
  }
  .practice-links>a>strong {
    font-size:.77rem
  }
  .notebook-breadcrumb {
    font-size:.7rem;
    gap:16px
  }
  .notebook-breadcrumb>span {
    font-size:.54rem;
    white-space:nowrap;
    padding-top:3px
  }
  .session-pagination strong {
    font-size:.75rem
  }
  .session-pagination span {
    font-size:.55rem
  }
  .session-pagination {
    gap:15px
  }
  .concept-image figcaption {
    font-size:.61rem
  }
  .course-progress {
    gap:12px;
    flex-wrap:wrap
  }
  .notebook-topline a {
    max-width:125px;
    text-align:right
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }
  .button {
    transition:none
  }
}
@media print {
  .site-header,.site-footer,.page-tabs,.session-finish,.optional-reference,.session-pagination {
    display:none
  }
  .notebook-shell {
    width:100%;
    padding:0
  }
  .study-page {
    border:0;
    box-shadow:none;
    padding:0
  }
  .idea-tiles {
    grid-template-columns:repeat(3,1fr)
  }
  .idea-tile,.scenario-note,.trap-note {
    break-inside:avoid
  }
  .notebook-recall details>div {
    display:block
  }
}

@media (max-width: 760px) {
  .brand span { display: grid; }
  .brand small { display: none; }
  .brand strong { font-size: .8rem; }
  .header-inner { gap: 8px; }
}
.notebook-tutor-link { font-size: .82rem; margin: 25px 0; }