/* A quieter entry point: choose a subject, then choose a lesson. */
.sidebar {
  width: 222px;
  padding: 34px 20px 26px;
}
.brand { margin-bottom: 48px; }
.brand small { font-size: 12px; letter-spacing: 1px; }
.nav-link { padding: 14px; font-size: 14px; margin: 6px 0; }
.sidebar-foot {
  margin-top: auto;
  padding: 20px 12px 0;
  font-size: 12px;
  line-height: 1.8;
  color: #748075;
}
.workspace { margin-left: 222px; min-width: 0; }
.topbar { height: 76px; padding: 0 44px; font-size: 13px; }
.topbar #breadcrumb { color: #6b7a70; }
.plain-btn { padding: 10px 0; font-size: 13px; color: #5b7064; }
main { max-width: 1260px; padding: 44px 44px 64px; min-width: 0; }
.footer { padding: 22px 44px; font-size: 12px; color: #7a8879; flex-wrap: wrap; }
.footer > span { min-width: 0; }

.academy-heading { margin-bottom: 32px; max-width: 760px; }
.academy-heading .eyebrow { font-size: 12px; letter-spacing: 2px; margin-bottom: 12px; color: #69816c; }
.academy-heading h1 { font-size: 36px; font-weight: 650; letter-spacing: -1px; margin: 0 0 14px; }
.academy-heading p { margin: 0; font-size: 16px; line-height: 1.9; color: #718073; }
.academy-tracks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.track-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 342px;
  padding: 30px;
  border: 1px solid #dce5d5;
  border-radius: 18px;
  background: #fff;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}
.track-card:hover { border-color: #9aac8c; box-shadow: 0 10px 24px #24473309; transform: translateY(-3px); }
.track-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 27px; }
.track-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 14px; background: #edf3e4; color: #456d47; flex-shrink: 0; }
.track-icon svg { width: 27px; height: 27px; stroke-width: 1.6; }
.track-count { font-size: 13px; color: #7a8a73; }
.track-card h2 { margin: 0 0 13px; font-size: 27px; font-weight: 650; line-height: 1.4; letter-spacing: -.6px; }
.track-card > p { font-size: 15px; color: #6f7d6d; line-height: 1.9; margin: 0 0 22px; }
.track-topics { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 12px; line-height: 1.8; color: #75856c; margin-bottom: 28px; }
.track-topics > span { display: inline-flex; align-items: center; gap: 7px; }
.track-topics > span::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: #a4b793; }
.track-bottom { display: flex; justify-content: space-between; align-items: center; gap: 14px; border-top: 1px solid #e8eddf; padding-top: 20px; margin-top: auto; font-size: 12px; color: #84907b; }
.track-action { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; color: #24573d; font-weight: 650; }
.track-trading { border-color: #e8e2d5; background: #fffdf9; }
.track-trading:hover { border-color: #cdb792; }
.track-trading .track-icon { background: #fbefdf; color: #b37945; }
.track-trading .track-topics > span::before { background: #c6ad88; }
.track-trading .track-bottom { border-color: #eee7dc; }
.academy-footnote { margin: 24px 0 0; font-size: 13px; line-height: 1.9; color: #788672; }

.back-link { display: inline-flex; gap: 9px; align-items: center; color: #56734f; font-size: 13px; padding: 4px 0; margin-bottom: 23px; }
.back-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.track-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; margin-bottom: 28px; }
.track-heading > div { min-width: 0; max-width: 730px; }
.track-heading h1 { margin: 0 0 12px; font-size: 33px; font-weight: 650; letter-spacing: -.6px; }
.track-heading p { margin: 0; color: #6f7f70; font-size: 15px; line-height: 1.9; }
.track-progress { flex-shrink: 0; white-space: nowrap; padding-top: 13px; font-size: 13px; color: #65805c; }
.course-search { display: flex; flex-wrap: wrap; align-items: center; gap: 15px 24px; padding-bottom: 29px; margin-bottom: 4px; border-bottom: 1px solid #e1e7da; }
.course-search .search-field { min-width: 0; max-width: 340px; flex-basis: 280px; }
.course-search .search-field input { font-size: 14px; padding-top: 12px; padding-bottom: 12px; }
.course-search .search-field svg { top: 16px; }
.course-search small { font-size: 12px; color: #819076; }
.course-group { margin-top: 31px; }
.course-group-heading { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 15px; }
.course-group-heading .group-number { font-size: 12px; letter-spacing: 1px; color: #8a9e78; }
.course-group-heading h2 { font-size: 18px; font-weight: 650; line-height: 1.5; letter-spacing: 0; margin: 0; }
.optional-label { color: #a17c53; font-size: 12px; font-weight: 400; border-left: 1px solid #ddd8c7; padding-left: 12px; }
.course-list { border: 1px solid #dfe6d8; border-radius: 13px; overflow: hidden; background: #fff; }
.course-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  width: 100%;
  gap: 20px;
  border: 0;
  border-bottom: 1px solid #e8ede1;
  background: transparent;
  padding: 23px 24px;
  text-align: left;
  transition: background .15s;
}
.course-row:last-child { border-bottom: 0; }
.course-row:hover { background: #f5f8ef; }
.course-row:focus-visible { position: relative; z-index: 1; outline-offset: -4px; }
.course-index { align-self: start; padding-top: 3px; font-size: 12px; letter-spacing: 1px; color: #9ba88e; }
.course-copy { display: block; min-width: 0; }
.course-copy strong { display: block; font-size: 16px; line-height: 1.6; font-weight: 600; color: #2d4935; margin-bottom: 5px; }
.course-copy > span { display: block; font-size: 14px; line-height: 1.85; color: #788572; overflow-wrap: anywhere; }
.course-meta { display: flex; gap: 15px; align-items: center; padding-left: 9px; font-size: 12px; white-space: nowrap; color: #849179; }
.course-state { color: #547343; font-size: 13px; }
.course-row.is-complete .course-state { color: #527b46; }
.course-row.is-complete .course-index { color: #749063; }
.track-description { font-size: 13px; color: #7d8976; line-height: 1.9; margin: 22px 0 0; }
#lesson-results .empty-state { margin-top: 27px; padding: 40px 22px; font-size: 14px; }

.check-simple { max-width: 1040px; }
.check-simple .page-heading h1 { font-size: 33px; }
.check-simple .page-heading p { font-size: 15px; line-height: 1.9; }
.check-controls { padding: 24px 26px; border: 1px solid #dfe6d6; border-radius: 13px; background: #fff; margin-bottom: 24px; }
.check-controls > span { display: block; font-size: 15px; font-weight: 600; color: #3d5b3c; }
.check-controls > p { margin: 7px 0 17px; color: #7a8871; font-size: 14px; line-height: 1.85; }
.check-controls .sample-buttons { gap: 10px; margin: 0; }
.check-controls .sample-buttons button { min-height: 43px; padding: 9px 16px; border: 1px solid #dce6d1; border-radius: 8px; background: #f6f9f0; color: #627653; font-size: 14px; line-height: 1.7; }
.check-controls .sample-buttons button:hover { background: #eaf1df; }
.check-controls .sample-buttons button[aria-pressed="true"] { background: #214f3d; border-color: #214f3d; color: #f5f8ef; }
.check-simple .panel { padding: 28px; }
.check-simple .report-header small { font-size: 12px; }
.check-simple .fact { padding: 18px; }
.check-simple .fact .fact-title { font-size: 15px; align-items: flex-start; flex-wrap: wrap; }
.check-simple .fact p { font-size: 14px; line-height: 1.85; }
.check-simple .fact-status { font-size: 12px; }
.check-simple .check-bottom-note { font-size: 12px; }
.check-simple .notice { font-size: 13px; }
.check-simple button.text-link { border: 0; background: transparent; padding: 8px 0 0; font-size: 14px; }
main:focus-visible { outline: 2px solid #779852; outline-offset: -2px; }
.check-simple .check-empty { min-height: 300px; }
.check-simple .check-empty p { font-size: 14px; max-width: 440px; }
.check-simple .report-math span { font-size: 12px; }

/* Supporting pages keep the same readable size as the course lists. */
main > .page-heading p { font-size: 15px; }
main .coin-card p { font-size: 14px; }
main .coin-card .coin-type,
main .coin-card .risk-hint { font-size: 12px; }
main .coin-card .text-link { font-size: 14px; }
main .filter-btn { font-size: 13px; padding: 8px 12px; }
:is(.track-card, .back-link, .course-row, .check-controls button):focus-visible { outline: 3px solid #779852; outline-offset: 4px; }
.course-row:focus-visible { outline-offset: -4px; }

@media (max-width: 1100px) {
  .sidebar { width: 200px; padding: 30px 17px 24px; }
  .brand { font-size: 15px; gap: 10px; }
  .workspace { margin-left: 200px; }
  .topbar { padding: 0 28px; }
  main { padding: 34px 28px 48px; }
  .footer { padding: 20px 28px; }
  .academy-tracks { gap: 18px; }
  .track-card { padding: 24px; }
  .track-card h2 { font-size: 25px; }
  .track-bottom { flex-wrap: wrap; gap: 8px 14px; }
  .course-row { padding: 21px; gap: 13px; }
  .course-meta { flex-direction: column; align-items: flex-end; gap: 6px; }
}

@media (max-width: 880px) {
  .sidebar { position: sticky; top: 0; inset: auto; width: 100%; height: auto; padding: 15px 24px 0; display: block; border-right: 0; border-bottom: 1px solid var(--line); background: #fcfdf9f5; backdrop-filter: blur(12px); }
  .brand { margin-bottom: 14px; font-size: 15px; gap: 11px; }
  .brand-x { width: 34px; height: 35px; border-radius: 9px; font-size: 23px; }
  .brand small { display: inline-block; margin-left: 12px; margin-top: 0; font-size: 12px; letter-spacing: .5px; }
  .sidebar .nav-caption, .sidebar-bottom, .sidebar-foot, .nav-spacer { display: none; }
  #navigation { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; margin: 0; padding-bottom: 10px; }
  .nav-link { min-width: 0; padding: 11px 7px; font-size: 13px; gap: 8px; margin: 0; justify-content: center; border-radius: 8px; }
  .nav-link svg { width: 17px; height: 17px; }
  .nav-link .new-tag { display: none; }
  .workspace { margin-left: 0; }
  .topbar { height: 58px; padding: 0 26px; }
  .topbar #breadcrumb { font-size: 12px; }
  .top-actions { gap: 10px; }
  .plain-btn { font-size: 12px; }
  main { padding: 32px 26px 44px; }
  .footer { padding: 22px 26px; }
  #toast { left: 50%; }
}

@media (max-width: 620px) {
  .sidebar { padding: 14px 16px 0; }
  .brand { margin-bottom: 12px; }
  .brand small { font-size: 12px; }
  .nav-link { font-size: 13px; padding: 10px 5px; gap: 7px; }
  .nav-link svg { height: 16px; width: 16px; }
  .topbar { padding: 0 20px; }
  main { padding: 28px 20px 42px; }
  .academy-heading { margin-bottom: 25px; }
  .academy-heading h1 { font-size: 29px; letter-spacing: -.6px; }
  .academy-heading p { font-size: 15px; }
  .academy-heading .eyebrow { margin-bottom: 10px; }
  .academy-tracks { grid-template-columns: minmax(0, 1fr); gap: 17px; }
  .track-card { padding: 25px; min-height: 305px; border-radius: 15px; }
  .track-top { margin-bottom: 21px; }
  .track-icon { width: 46px; height: 46px; border-radius: 12px; }
  .track-icon svg { width: 25px; height: 25px; }
  .track-card h2 { font-size: 26px; margin-bottom: 10px; }
  .track-card > p { margin-bottom: 18px; font-size: 14px; }
  .track-topics { margin-bottom: 21px; }
  .track-bottom { padding-top: 18px; }
  .academy-footnote { font-size: 12px; margin-top: 20px; }
  .back-link { margin-bottom: 19px; }
  .track-heading { flex-direction: column; gap: 10px; margin-bottom: 23px; }
  .track-heading h1 { font-size: 28px; margin-bottom: 10px; }
  .track-heading p { font-size: 14px; }
  .track-progress { padding-top: 0; font-size: 12px; }
  .course-search { gap: 11px; padding-bottom: 23px; }
  .course-search .search-field { flex-basis: 100%; max-width: none; }
  .course-group { margin-top: 26px; }
  .course-group-heading { gap: 9px; margin-bottom: 13px; }
  .course-group-heading h2 { font-size: 17px; }
  .course-row { grid-template-columns: 23px minmax(0, 1fr); gap: 7px 10px; padding: 19px 16px; }
  .course-index { grid-column: 1; grid-row: 1; }
  .course-copy { grid-column: 2; grid-row: 1; }
  .course-copy strong { font-size: 15px; line-height: 1.7; }
  .course-copy > span { font-size: 14px; line-height: 1.8; }
  .course-meta { grid-column: 2; grid-row: 2; flex-direction: row; align-items: center; gap: 16px; padding: 3px 0 0; }
  .course-state { font-size: 12px; }
  .footer { padding: 22px 20px; font-size: 12px; display: block; line-height: 1.9; }
  .footer > span { display: block; margin-bottom: 6px; }
  .check-simple .page-heading h1 { font-size: 28px; }
  .check-simple .page-heading p { font-size: 14px; }
  .check-controls { padding: 20px; }
  .check-controls .sample-buttons { gap: 8px; }
  .check-controls .sample-buttons button { padding: 8px 12px; font-size: 13px; }
  .check-simple .panel { padding: 19px; }
  .check-simple .fact { padding: 15px; }
  .check-simple .report-header { gap: 10px; }
}

@media (max-width: 360px) {
  .brand small { display: none; }
  .sidebar { padding-right: 12px; padding-left: 12px; }
  .nav-link { font-size: 12px; gap: 5px; }
  .topbar { padding: 0 16px; }
  main { padding-right: 16px; padding-left: 16px; }
  .track-card { padding: 23px 20px; }
  .track-card h2 { font-size: 25px; }
  .track-topics { gap: 7px 11px; }
  .course-row { padding: 18px 13px; gap: 7px 8px; }
  .check-controls { padding: 17px; }
  .footer { padding-right: 16px; padding-left: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .track-card, .course-row { transition: none; }
  .track-card:hover { transform: none; }
}