.lesson-hero .page-hero-inner { padding-block: 52px 60px; }
.lesson-hero h1 { font-size: clamp(2.8rem, 6vw, 5rem); }
.lesson-meta { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.lesson-meta span { padding: 5px 11px; border: 1px solid rgba(255,255,255,.2); border-radius: 99px; color: #d9e7e3; font-size: .73rem; }
.lesson { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: center; gap: 65px; padding-block: 66px 110px; }
.lesson-nav { position: sticky; top: 110px; align-self: start; display: grid; gap: 7px; }
.lesson-nav strong { margin-bottom: 8px; color: var(--coral); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; }
.lesson-nav a { padding: 7px 11px; border-left: 2px solid var(--line); color: var(--muted); font-size: .83rem; text-decoration: none; }
.lesson-nav a:hover { border-color: var(--coral); color: var(--ink); }
.lesson-article { min-width: 0; }
.lesson-article section { scroll-margin-top: 105px; margin-bottom: 58px; }
.lesson-article h2 { margin-bottom: 16px; font-size: clamp(2rem, 4vw, 3rem); }
.lesson-article h3 { margin: 30px 0 10px; font-family: Georgia, serif; font-size: 1.35rem; }
.lesson-article p { color: #3e514e; }
.lesson-article li + li { margin-top: 7px; }
.rule-box { margin: 26px 0; padding: 23px 25px; border-left: 4px solid var(--yellow); background: var(--green-50); }
.rule-box strong { display: block; margin-bottom: 5px; color: var(--green-700); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.rule-box p { margin: 0; color: var(--ink); font-family: Georgia, serif; font-size: 1.17rem; }
.table-scroll { overflow-x: auto; margin: 24px 0 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.grammar-table { width: 100%; border-collapse: collapse; white-space: nowrap; }
.grammar-table th, .grammar-table td { padding: 13px 16px; border-bottom: 1px solid var(--line); text-align: left; }
.grammar-table th { color: var(--green-900); background: var(--green-50); font-size: .76rem; letter-spacing: .04em; }
.grammar-table tr:last-child td { border-bottom: 0; }
.ending { color: var(--coral); font-weight: 850; }
.stem { font-weight: 750; }
.example-list { display: grid; gap: 9px; padding: 0; list-style: none; }
.example-list li { padding: 13px 16px; border-left: 3px solid var(--green-100); background: var(--paper); }
.mini-quiz { padding: 27px; border: 1px solid var(--line); border-radius: 9px; background: var(--paper); }
.mini-quiz h3 { margin-top: 0; }
.quiz-row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 7px; margin: 17px 0; }
.quiz-row label { color: #3e514e; font-weight: 650; }
.quiz-row input { width: 100%; min-width: 0; padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px; background: white; font-size: 1rem; }
.quiz-row input.is-correct { border-color: #2f8762; background: #effaf4; }
.quiz-row input.is-wrong { border-color: #c95b45; background: #fff2ef; }
.mini-quiz > p input[data-answer] { width: 10em; min-width: 10em; max-width: 60vw; margin: 3px 2px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 5px; background: white; font-size: 1rem; }
.mini-quiz > p input[data-answer].is-correct { border-color: #2f8762; background: #effaf4; }
.mini-quiz > p input[data-answer].is-wrong { border-color: #c95b45; background: #fff2ef; }
.quiz-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.print-actions { position: sticky; bottom: 18px; z-index: 3; display: flex; justify-content: flex-end; margin-bottom: 22px; pointer-events: none; }
.print-actions .quiz-button { pointer-events: auto; box-shadow: 0 8px 22px rgba(24, 54, 48, .16); }
.quiz-button { padding: 11px 18px; border: 1px solid var(--coral); border-radius: 7px; color: white; background: var(--coral); font-weight: 800; cursor: pointer; }
.quiz-button:hover { background: #ce5b3a; border-color: #ce5b3a; }
.quiz-button-secondary { color: var(--green-900); border-color: var(--green-700); background: transparent; }
.quiz-button-secondary:hover { color: white; border-color: var(--green-700); background: var(--green-700); }
.quiz-result { min-height: 24px; margin: 13px 0 0; font-weight: 750; }
.lesson-next { display: flex; justify-content: space-between; gap: 20px; margin-top: 70px; padding-top: 25px; border-top: 1px solid var(--line); }
.lesson-next a { font-weight: 800; text-decoration-color: var(--yellow); text-underline-offset: 4px; }
@media (max-width: 780px) {
  .lesson { grid-template-columns: 1fr; gap: 34px; }
  .lesson-nav { position: static; grid-template-columns: repeat(2, 1fr); }
  .lesson-nav strong { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .lesson-next { flex-direction: column; }
}