.english-page{--yellow:#ffab4a;--cyan:#ffab4a;--yellow-soft:#e89837;background:radial-gradient(ellipse at 90% 0,#2b1a0c 0,transparent 42%),#090b0c}.english-page .math-command,.english-page .math-panel,.english-page .math-grade,.english-page .math-point{background:#1c1711}.english-page .math-stage-card{background:linear-gradient(125deg,#302214,#15120f 75%)}.english-page a.math-stage-card{border-color:#9a6327;border-top-color:var(--cyan)}.english-page a.math-stage-card:hover{background:#382513}.english-page .math-stage-top span,.english-page .math-point .math-key{color:#ffd09a}.english-page .math-command h2{margin:4px 0 8px;font-size:clamp(1.6rem,3vw,2.4rem)}.english-page .math-point-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.english-page .math-poster-frame img{display:block;width:100%;height:auto;max-height:none;aspect-ratio:3/1;object-fit:contain}.english-quiz-page [data-question-text]{white-space:pre-line;line-height:1.85;font-size:clamp(1.2rem,2.4vw,1.85rem);overflow-wrap:anywhere}.english-quiz-page [data-feedback-explanation],.english-quiz-page .quiz-answer-log details p{white-space:pre-line}.english-word-list{padding:18px;border:1px solid #62513a;background:#15130f}.english-word-list summary{cursor:pointer;font-weight:800;color:var(--yellow)}.english-word-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:16px}.english-word{padding:12px;border:1px solid #494036}.english-word strong{display:block;color:#ffe0b8;font-size:1.08rem}.english-word span{font-size:.9rem}.english-page .math-grades{scroll-margin-top:90px}@media(max-width:800px){.english-word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.english-page .math-point-grid{grid-template-columns:1fr}}

/* Mark the tested word in the sentence and the answer log. */
.english-page .english-target{background:transparent;color:#fff1ce;font-weight:900;text-decoration-line:underline;text-decoration-color:#ffab4a;text-decoration-thickness:.13em;text-underline-offset:.18em}.english-page .math-field{scroll-margin-top:90px}.english-page .english-section-count{margin:0;color:#d9bd9b}.english-quiz-page .quiz-answer-item strong{white-space:pre-line}

/* Separate English routes and five-section vocabulary groups. */
.english-track-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.english-track-card{min-height:230px}.english-track-card h3{font-size:clamp(1.6rem,3vw,2.2rem)}.english-section-groups{display:grid;gap:12px}.english-section-group{border:1px solid #8c602f;background:#15120f;scroll-margin-top:100px}.english-section-group>summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:76px;padding:16px 20px;cursor:pointer;list-style:none;color:#fff0db}.english-section-group>summary::-webkit-details-marker{display:none}.english-section-group>summary::after{content:"＋";font-size:1.8rem;color:#ffab4a}.english-section-group[open]>summary::after{content:"−"}.english-section-group>summary strong{display:block;font-size:1.15rem}.english-section-group>summary small{display:block;color:#d9bd9b}.english-section-group>summary:focus-visible{outline:3px solid #ffab4a;outline-offset:3px}.english-section-group>.math-stage-grid{padding:0 16px 16px}.english-section-group[open]>summary{border-bottom:1px solid #5b4025;margin-bottom:16px}@media(max-width:600px){.english-track-grid{grid-template-columns:1fr}.english-track-card{min-height:0}.english-section-group>summary{padding:14px;min-height:72px}.english-section-group>.math-stage-grid{padding:0 12px 12px}}