/* Standalone field-school reader. The layout keeps the reading column narrow and the course outline in view. */
.ls-reader { color:var(--ink); background:#f8f7f3; padding:0 0 clamp(52px,7vw,95px); }
.ls-reader [hidden] { display:none!important; }
.ls-shell { max-width:1420px; margin:0 auto; padding-inline:clamp(12px,3.7vw,60px); }
.ls-sr {position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.ls-crumbs {display:flex;align-items:center;flex-wrap:wrap;gap:4px 9px;min-height:56px;padding-block:8px;font-size:.76rem;line-height:1.4;color:#53636e}
.ls-crumbs a,.ls-pager a,.ls-module-link {text-underline-offset:3px}.ls-crumbs a:hover,.ls-pager a:hover,.ls-module-link:hover{text-decoration:underline}
.ls-hero {isolation:isolate;position:relative;display:grid;grid-template-columns:minmax(0,1.6fr) minmax(230px,.85fr);min-height:260px;overflow:hidden;border-radius:15px;background:var(--ink);color:white;}
.ls-hero-copy {display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:15px;padding:clamp(24px,3.6vw,52px)}
.ls-hero-tags {display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.ls-kicker {margin:0;color:var(--rust);font-size:.64rem;line-height:1.4;letter-spacing:.12em;text-transform:uppercase;font-weight:700}
.ls-hero .ls-kicker {color:#efd7ac}.ls-hero-tags>span {display:inline-block;border:1px solid #ffffff75;border-radius:5px;color:#f2f3f2;font-size:.66rem;padding:3px 7px}
.ls-hero h1 {margin:0;font:600 clamp(38px,4.7vw,74px)/1.045 var(--display);text-transform:uppercase;letter-spacing:-.027em;overflow-wrap:break-word;text-wrap:balance}
.ls-goal {margin:0;max-width:59ch;color:#edf0ed;font-size:clamp(14px,1.12vw,17px);line-height:1.55}
.ls-hero-media {position:relative;min-width:0;min-height:100%}.ls-hero-media img{display:block;position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ls-hero-media::after {content:'';position:absolute;inset:0;background:linear-gradient(90deg,#10243a66,transparent 42%),linear-gradient(0deg,#0617258c,transparent 45%)}
.ls-hero-media>span {position:absolute;z-index:1;right:16px;bottom:16px;color:#fff;padding:5px 8px;border:1px solid #ffffff80;border-radius:4px;background:#10243a80;font-size:.65rem;line-height:1;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.08em}
.ls-layout {display:grid;grid-template-columns:minmax(200px,285px) minmax(0,770px);align-items:start;justify-content:center;gap:clamp(24px,4vw,75px);margin-top:clamp(22px,3.2vw,50px)}
.ls-aside {position:sticky;top:98px;min-width:0;max-height:calc(100vh - 112px);overflow-y:auto;scrollbar-width:thin}
.ls-outline,.ls-meter,.ls-sheet {border:1px solid #d9dedb;border-radius:13px;background:white;}
.ls-outline {overflow:hidden}.ls-outline summary {display:flex;gap:10px;align-items:center;justify-content:space-between;padding:18px 19px;list-style:none;color:var(--ink);font-size:1rem;font-weight:700;line-height:1.3}.ls-outline summary::-webkit-details-marker{display:none}
.ls-outline[open] summary {border-bottom:1px solid #d9dedb}.ls-caret {display:grid;place-items:center;width:21px;height:21px;color:var(--rust);line-height:1}.ls-outline[open] .ls-caret{transform:rotate(180deg)}
.ls-outline-body {padding:10px 9px 4px}.ls-unit{padding:2px 10px 13px;color:#51616b;font-size:.78rem;line-height:1.45}
.ls-outline-body ol {list-style:none;margin:0;padding:0}.ls-outline-link {display:grid;grid-template-columns:27px 1fr;gap:9px;padding:11px 9px;border-radius:7px;align-items:start;margin-bottom:4px;line-height:1.35}
.ls-outline-link:hover {background:#f4f4f0}.ls-outline-link[aria-current]{background:#f6eae1;box-shadow:inset 3px 0 0 var(--rust)}
.ls-outline-link strong,.ls-outline-link small {display:block}.ls-outline-link strong{font-size:.83rem;font-weight:640}.ls-outline-link small{color:#52636b;font-size:.68rem;margin-top:4px}
.ls-outline-index {border:1px solid #d2d8d5;border-radius:50%;display:grid;place-items:center;width:25px;height:25px;background:white;color:#435560;font-size:.62rem;font-weight:650}
.ls-passed .ls-outline-index {background:#dceadf;border-color:#adccba;color:#1c5c3e}
.ls-module-link {display:flex;justify-content:space-between;align-items:center;padding:12px 10px;margin-top:5px;border-top:1px solid #e2e6e1;color:var(--ink);font-size:.8rem;font-weight:600;min-height:44px}
.ls-meter {margin-top:10px;padding:15px 18px}.ls-meter>div{display:flex;justify-content:space-between;gap:12px;font-size:.74rem;margin-bottom:6px}.ls-meter progress {display:block;width:100%;height:7px;border:none;border-radius:20px;overflow:hidden;color:var(--rust);background:#e8eae5;appearance:none}.ls-meter progress::-webkit-progress-bar{background:#e8eae5}.ls-meter progress::-webkit-progress-value {background:var(--rust);border-radius:20px}.ls-meter progress::-moz-progress-bar {background:var(--rust)}
.ls-sheet {min-width:0;max-width:100%;padding:clamp(22px,3.6vw,51px);line-height:1.58}
.ls-sheet h2,.ls-notes>label {display:block;margin:0;color:var(--ink);font-size:clamp(21px,2vw,29px);line-height:1.16;font-weight:670;letter-spacing:-.035em;text-wrap:balance}
.ls-block p,.ls-example>p:last-child {color:#283a45;margin:10px 0 0;font-size:clamp(15px,1.12vw,17px);line-height:1.65;white-space:pre-line}.ls-block+.ls-block{margin-top:26px}
.ls-example,.ls-calc,.ls-practice,.ls-notes {margin-top:clamp(23px,3vw,38px)}
.ls-example {padding:clamp(18px,2.3vw,30px);background:#f5efe2;border-left:4px solid #bd753c;border-radius:0 10px 10px 0}.ls-example .ls-kicker,.ls-practice .ls-kicker,.ls-calc .ls-kicker{margin-bottom:10px}.ls-example h2{font-size:clamp(20px,1.65vw,25px)}
.ls-calc {padding:clamp(18px,2.4vw,32px);background:var(--ink);color:white;border-radius:13px}.ls-calc .ls-kicker{color:#f4d2a0}.ls-calc h2 {color:white}.ls-calc>p:not(.ls-kicker){color:#e0e6e8}.ls-calc #ls-calc-hint {font-size:.88rem;line-height:1.52;margin:12px 0 17px}
.ls-inputs,.ls-practice fieldset {margin:0;padding:0;border:0;min-width:0}.ls-inputs {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.ls-number{display:flex;flex-direction:column;justify-content:flex-end;gap:5px;font-size:.7rem;line-height:1.25;color:#e7ebeb}.ls-number-field{display:flex;align-items:center;gap:2px;padding:4px 8px;background:white;border-radius:5px;color:#172d3e}.ls-number-field>span{font-size:.7rem;color:#435865}.ls-number input{font:650 .95rem/1 Golos,Arial,sans-serif;color:var(--ink);min-height:34px;width:100%;min-width:0;border:0;background:none;font-variant-numeric:tabular-nums}.ls-number input:focus-visible{outline:none}.ls-number-field:focus-within{outline:3px solid #ebb576;outline-offset:2px}.ls-number-field:has([aria-invalid=true]){outline:2px solid #ffaa88}
.ls-bar {height:12px;margin-top:21px;background:#e9b16f;border-radius:8px;overflow:hidden}.ls-bar i{display:block;height:100%;background:#93b4be}.ls-key{display:flex;flex-wrap:wrap;gap:4px 14px;margin:7px 0 12px;font-size:.65rem;color:#f0f3f3}.ls-key span{display:inline-flex;align-items:center;gap:5px}.ls-key span::before{content:'';height:7px;width:7px;background:#93b4be;border-radius:2px}.ls-key span+span::before{background:#e9b16f}
.ls-calculation {display:flex;flex-wrap:wrap;gap:8px 23px;padding:11px 0;border-block:1px solid #ffffff45}.ls-calculation>div{display:grid;gap:2px}.ls-calculation span{font-size:.75rem;color:#d3dce0}.ls-calculation strong{font-size:clamp(18px,2vw,26px);line-height:1.14;font-variant-numeric:tabular-nums;letter-spacing:-.04em}.ls-calculation>div:nth-child(2) strong{color:#ffdda5}.ls-calculation p{color:#ffcead;font-size:.77rem}.ls-equation {margin-top:9px;font-size:.71rem;line-height:1.5}
.ls-resource {display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;padding:15px 17px;border:1px solid #dce1db;border-radius:8px;background:#f7f8f5}.ls-resource small{font-size:.72rem;color:#54646a}.ls-resource strong{font-size:.85rem;color:var(--ink)}.ls-resource:hover{border-color:var(--rust)}
.ls-practice {border-top:1px solid #dce0da;padding-top:clamp(22px,3vw,35px)}
.ls-practice fieldset{margin:17px 0}.ls-practice legend {display:block;padding:0;font-size:1.02rem;font-weight:600;line-height:1.45;color:var(--ink)}.ls-instruction{font-size:.79rem;color:#5c6b73;margin:4px 0 11px}.ls-choices{display:grid;gap:7px}
.ls-choice {position:relative;display:grid;grid-template-columns:18px minmax(0,1fr);align-items:start;gap:9px;border:1px solid #d6ddda;border-radius:7px;padding:11px 13px;min-height:44px;font-size:.9rem;line-height:1.43;color:var(--ink);cursor:pointer}.ls-choice input {position:absolute;margin:0;opacity:0;width:18px;height:18px;top:13px;left:13px}.ls-radio {display:block;width:17px;height:17px;margin-top:2px;border:1.5px solid #869297;border-radius:50%;background:white}.ls-choice:has(input:checked){border-color:var(--ink);background:#f0f2ee}.ls-choice input:checked+.ls-radio{background:var(--ink);box-shadow:inset 0 0 0 3px white;border-color:var(--ink)}.ls-choice:has(input:focus-visible){outline:3px solid #d07742;outline-offset:2px}.ls-choice:hover{border-color:#8c9997}
.ls-button {display:inline-flex;align-items:center;justify-content:center;min-height:45px;border:0;border-radius:7px;padding:11px 17px;font:650 .85rem/1.3 Golos,sans-serif;background:var(--ink);color:white}.ls-button:hover:not(:disabled){background:#243e52}.ls-feedback{font-size:.87rem;line-height:1.52}.ls-feedback:not(:empty){padding:12px 14px;border-radius:6px;margin-top:13px}.ls-right {background:#e6efe7;color:#1d503a}.ls-wrong {background:#f9e9df;color:#7c3223}.ls-jsoff{font-size:.8rem;line-height:1.5;color:#485960;margin-top:12px}
.ls-notes {background:#f7f7f3;border-radius:9px;padding:19px 20px}.ls-notes>label{font-size:1.2rem}.ls-notes>p{font-size:.79rem;color:#4c5d67;margin:7px 0 10px}.ls-notes textarea{display:block;width:100%;resize:vertical;min-height:78px;border:1px solid #cbd3cd;border-radius:6px;background:white;padding:10px 12px;font:inherit;font-size:.9rem;color:var(--ink)}.ls-notes textarea:focus-visible{outline:3px solid #d07742;outline-offset:2px}.ls-notes small{display:block;color:#345a44;font-size:.68rem;line-height:1.4}.ls-notes small:not(:empty){margin-top:5px}
.ls-finish {display:flex;align-items:center;gap:9px 15px;flex-wrap:wrap;padding:22px 0 4px}.ls-finish .ls-button{background:var(--rust)}.ls-finish .ls-button:hover:not(:disabled){background:#8c2b19}.ls-finish .ls-button:disabled{background:#e6e8e4;color:#516168;cursor:default}.ls-finish .ls-button.ls-finished{background:#dcebdd;color:#205239}.ls-finish p{font-size:.76rem;color:#52636b;line-height:1.4;flex:1 1 160px}
.ls-pager {display:flex;align-items:stretch;justify-content:space-between;gap:12px;margin-top:18px;border-top:1px solid #d9dedb}.ls-pager a{display:flex;align-items:center;min-height:48px;padding:8px 0;color:var(--ink);font-weight:600;font-size:.79rem}.ls-pager a:last-child{text-align:right;justify-content:flex-end}
@media(max-width:780px){.ls-layout{grid-template-columns:1fr;gap:14px}.ls-aside{position:static;max-height:none;overflow:visible}.ls-meter{margin:0;padding:10px 14px;border-top:0;border-radius:0 0 9px 9px}.ls-aside:has(.ls-meter:not([hidden])) .ls-outline{border-radius:9px 9px 0 0}.ls-meter>div{margin-bottom:4px}.ls-outline summary{padding:13px 15px;min-height:46px}.ls-outline-body{padding:7px 6px 0}.ls-hero{min-height:210px;grid-template-columns:minmax(0,1.8fr) minmax(110px,.85fr)}.ls-hero-copy{padding:22px}.ls-hero h1{font-size:clamp(33px,5.6vw,48px)}.ls-hero-tags{gap:7px 10px}.ls-hero-media>span{right:9px;bottom:10px}.ls-sheet{padding:22px 19px}.ls-crumbs{min-height:47px}}
@media(max-width:580px){.ls-shell{padding-inline:10px}.ls-crumbs{font-size:.7rem;gap:2px 6px}.ls-hero{display:flex;flex-direction:column-reverse}.ls-hero-media {min-height:0;width:100%;height:clamp(92px,25vw,145px)}.ls-hero-media img{object-position:50% 47%}.ls-hero-copy{gap:10px;padding:19px}.ls-hero h1{font-size:clamp(35px,8.7vw,46px)}.ls-goal{font-size:.86rem;line-height:1.45}.ls-layout {margin-top:13px}.ls-sheet{padding:21px 15px}.ls-calculation {gap:8px 14px}.ls-resource{align-items:flex-start;flex-direction:column;gap:3px}.ls-notes{padding:15px}.ls-hero-media::after{background:linear-gradient(0deg,#10243a55,transparent 60%)}}
@media(max-width:430px){.ls-inputs{grid-template-columns:1fr 1fr}.ls-number:last-child{grid-column:1/-1}.ls-calc{padding:16px 13px}.ls-choice{padding:10px 9px}.ls-example{padding:16px 13px}.ls-sheet h2{overflow-wrap:break-word}}
.ls-sheet>.ls-calc:first-child{margin-top:0;margin-bottom:clamp(22px,3vw,38px)}
.ls-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:4px;border:1px solid #ffffff45;border-radius:7px;margin:18px 0 11px;background:#0b1b2b}
.ls-steps button{min-width:0;min-height:40px;display:flex;align-items:center;justify-content:center;gap:5px;padding:5px 3px;border:0;border-radius:4px;color:#ecf1ed;background:transparent;font:620 clamp(.65rem,1.13vw,.8rem)/1.17 Golos,sans-serif;overflow-wrap:break-word}
.ls-steps button span{color:#b3c5c9;font-size:.58rem}.ls-steps button[aria-pressed=true]{background:#f0d7ab;color:#14293b}.ls-steps button[aria-pressed=true] span{color:#5e4a34}.ls-steps button:hover:not([aria-pressed=true]){background:#2a4050}
.ls-worked>p{margin:0;color:#dce6e9;font-size:.77rem;line-height:1.45}.ls-worked>strong{display:block;margin-top:3px;color:#fff;font-size:clamp(17px,2vw,24px);line-height:1.25;font-variant-numeric:tabular-nums;letter-spacing:-.035em}.ls-worked+.ls-bar{margin-top:11px}.ls-calc[data-stage="1"] .ls-bar{box-shadow:0 0 0 1px #f2d5ae}.ls-calc[data-stage="2"] .ls-worked>strong{color:#ffdda5}.ls-practice fieldset:disabled .ls-choice{cursor:default}.ls-practice fieldset:disabled .ls-choice:hover:not(:has(input:checked)){border-color:#d6ddda}
@media(max-width:480px){.ls-steps button{flex-direction:column;gap:2px;min-height:43px}.ls-steps{gap:2px;padding:3px}.ls-steps button span{font-size:.55rem}}
.ls-study-help {margin:12px 0;border:1px solid #d2c9ba;background:#f5f1e8;border-radius:8px;padding:0 13px}
.ls-study-help summary,.ls-plan-link {min-height:43px;line-height:1.45;padding:10px 0;font-size:13px;font-weight:650;color:#803b27}
.ls-study-help p{font-size:13px;line-height:1.5}.ls-study-help div{display:flex;flex-wrap:wrap;gap:0 14px}
.ls-study-help a,.ls-plan-link{display:inline-flex;align-items:center;min-height:43px;font-size:12px;text-decoration:underline;text-underline-offset:3px}

.ls-quiz-shortcut {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 14px;
  border: 1px solid #9aa8b0;
  border-radius: 7px;
  color: white;
  font-size: .85rem;
  font-weight: 600;
}
.ls-quiz-shortcut:hover, .ls-quiz-shortcut:focus-visible { background: #26445a; }
.ls-pager { align-items: center; }
.ls-pager .ls-advance {
  display: grid;
  align-content: center;
  justify-items: start;
  justify-content: start;
  gap: 2px;
  max-width: 70%;
  padding: 10px 14px;
  margin-block: 8px;
  border-radius: 7px;
  background: var(--ink);
  color: white;
  text-align: left;
  overflow-wrap: anywhere;
}
.ls-advance > span { color: #e2dfd6; font-size: .74rem; }
.ls-advance > strong { font-size: .9rem; }
@media (max-width: 780px) {
  body.ls-answering .sch-ansara, body.ls-answering .sch-back-top { visibility: hidden; }
  .ls-crumbs a { display: inline-flex; align-items: center; min-height: 40px; }
  .ls-finish { padding-top: 14px; }
  .ls-pager { margin-top: 12px; }
  .ls-notes textarea, .ls-number input { font-size: 16px; }
}