/* E4E — components.css: grammar cards, vocab, flashcards, quiz, notes, badges, charts. */

/* Grammar */
.grammar-card{border:1px solid var(--line);border-inline-start:5px solid var(--brand-2);border-radius:12px;padding:16px;background:var(--card);margin-bottom:12px}
.grammar-card h3{color:var(--brand);margin-bottom:6px;font-size:1.05rem}
.formula-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin:12px 0}
.formula{background:linear-gradient(180deg,var(--brand-soft),#fff);border:1.5px dashed var(--brand-2);border-radius:12px;padding:12px;text-align:center}
.formula b{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--brand);margin-bottom:4px}
.formula code{font-size:.98rem;font-weight:700}
.eg-table{width:100%;border-collapse:collapse;margin:10px 0;font-size:.92rem}
.eg-table th,.eg-table td{border:1px solid var(--line);padding:8px 10px;text-align:start}
.eg-table th{background:var(--bg-soft);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
.hl{background:#fef9c3;padding:1px 6px;border-radius:6px;font-weight:700}
.interactive-eg{border:1px solid var(--line);border-radius:10px;margin:8px 0;overflow:hidden}
.interactive-eg button.q{width:100%;background:var(--bg);border:0;padding:11px 14px;text-align:start;font-size:.95rem;color:var(--text);display:flex;justify-content:space-between;gap:8px;min-height:46px}
.interactive-eg .a{display:none;padding:11px 14px;background:var(--ok-soft);font-size:.9rem}
.interactive-eg.open .a{display:block}

/* Notes & mistakes */
.note-card{border-radius:12px;padding:14px 16px;margin-bottom:12px;border:1px solid}
.note-card.important{background:#fffbeb;border-color:#f59e0b;border-inline-start:6px solid var(--warn);color:#451a03}
.note-card.important b.t{color:var(--warn)}
.mistake-card{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px;background:var(--card)}
.mistake-pair{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0}
.mistake-pair .w{background:var(--bad-soft);border-radius:9px;padding:9px 12px}
.mistake-pair .c{background:var(--ok-soft);border-radius:9px;padding:9px 12px}
.mistake-pair .tag{font-size:.75rem;font-weight:800;text-transform:uppercase}
.why{font-size:.88rem;color:var(--muted)}

/* Vocab */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.vocab-card{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--card)}
.vocab-card .w{font-size:1.1rem;font-weight:800;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.vocab-card .pron{color:var(--muted);font-size:.86rem}
.vocab-card .pos{font-size:.72rem;font-weight:800;background:var(--brand-soft);color:var(--brand);border-radius:99px;padding:2px 9px}
.vocab-card .mean{margin:6px 0;font-size:.92rem}
.vocab-card .ex{font-size:.86rem;color:var(--muted);font-style:italic}
.vocab-card .row{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.key-star{color:var(--warn);font-weight:800}
.speak{border:1px solid var(--line);background:var(--bg);border-radius:8px;min-width:36px;min-height:36px;font-size:1rem}
.speak:hover{background:var(--brand-soft)}
.diff-dots{font-size:.7rem;letter-spacing:2px;color:var(--warn)}

/* Flashcards */
.flash-wrap{display:flex;flex-direction:column;align-items:center;gap:12px}
.flash-card{width:min(460px,100%);height:260px;perspective:1000px;background:none;border:0;display:block;cursor:pointer}
.flash-inner{position:relative;display:block;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flash-card.flipped .flash-inner{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:16px;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:24px;text-align:center;box-shadow:var(--shadow-lg);border:1px solid var(--line);background:var(--card)}
.flash-face.back{transform:rotateY(180deg);background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;border:0}
.flash-face .big{font-size:1.7rem;font-weight:800}
.flash-ctrl{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}

/* Quiz */
.quiz-progress{height:10px;background:var(--bg-soft);border-radius:99px;overflow:hidden;margin:10px 0}
.quiz-progress > span{display:block;height:100%;background:linear-gradient(90deg,var(--brand-2),var(--accent));transition:width .3s}
.opt{display:block;width:100%;text-align:start;border:2px solid var(--line);background:var(--card);color:var(--text);border-radius:12px;padding:13px 15px;margin:8px 0;font-size:.97rem;min-height:52px;transition:border-color .15s,background .15s}
.opt:hover:not(:disabled){border-color:var(--brand-2);background:var(--bg)}
.opt .k{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--bg-soft);font-weight:800;font-size:.82rem;margin-inline-end:10px}
.opt.correct{border-color:var(--ok);background:var(--ok-soft)}
.opt.correct .k{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt.wrong .k{background:var(--bad);color:#fff}
.opt:disabled{cursor:default}
.explain{border-radius:12px;padding:13px 15px;margin-top:10px;font-size:.9rem;display:none}
.explain.show{display:block}
.explain.good{background:var(--ok-soft);border:1px solid var(--ok)}
.explain.bad{background:var(--bad-soft);border:1px solid var(--bad)}
.result-ring{width:130px;height:130px;border-radius:50%;display:grid;place-items:center;font-size:1.4rem;font-weight:800;margin:6px auto;border:10px solid var(--ok)}
.mini-quiz{border:1.5px dashed var(--brand-2);border-radius:12px;padding:16px;margin:14px 0;background:color-mix(in srgb,var(--brand-soft) 40%,var(--card))}

/* Exercises */
.ex-card{border:1px solid var(--line);border-radius:12px;padding:15px;margin-bottom:12px;background:var(--card)}
.ex-words{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.ex-words .chip{border:1.5px solid var(--brand-2);background:var(--card);color:var(--text);border-radius:9px;padding:9px 13px;font-weight:600;min-height:42px}
.ex-words .chip.picked{background:var(--brand-soft)}
.ex-answer{min-height:52px;border:2px dashed var(--line);border-radius:10px;padding:8px;display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.ex-answer .chip{background:var(--brand);color:#fff;border-color:var(--brand);border-radius:9px;padding:7px 12px;border:1.5px solid var(--brand)}
.ex-words .chip,.ex-answer .chip{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.tf-row{display:flex;gap:10px;margin-top:8px}
.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.match-grid .opt{min-height:46px;margin:0}
.match-grid .opt.sel{border-color:var(--warn);background:var(--warn-soft)}

/* Patterns, examples, summary */
.pattern{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0;font-size:.95rem}
.pattern code{background:#fef9c3;padding:2px 8px;border-radius:6px;font-weight:700}
.review-card{background:linear-gradient(135deg,#fefce8,#ecfdf5);border:1px solid var(--line);border-radius:14px;padding:18px}
.check-list{list-style:none}
.check-list li{padding:6px 0 6px 30px;position:relative}
.check-list li::before{content:"✓";position:absolute;inset-inline-start:4px;color:var(--ok);font-weight:800}

/* Badges */
.badge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.badge{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.badge.locked{opacity:.45;filter:grayscale(1)}
.badge .e{font-size:2rem}
.badge b{display:block;font-size:.85rem;margin-top:6px}
.badge small{color:var(--muted)}

/* Notes area, bookmarks */
.note-area{width:100%;min-height:110px;border:1.5px solid var(--line);border-radius:10px;padding:12px;font-family:inherit;font-size:.92rem;background:var(--card);color:var(--text);resize:vertical}
.bookmark-btn.active{background:var(--warn-soft);border-color:var(--warn)}

/* Charts */
.chart{width:100%;height:auto;max-height:230px}
.bar-row{display:grid;grid-template-columns:170px 1fr 52px;gap:10px;align-items:center;margin:7px 0;font-size:.86rem}
.bar-track{height:12px;background:var(--bg-soft);border-radius:99px;overflow:hidden}
.bar-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand-2),var(--accent))}
.streak-fire{font-size:1.6rem}

/* Review buckets */
.bucket{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:10px;background:var(--card)}
.bucket h4{margin-bottom:6px}
.vocab-img{width:100%;height:175px;object-fit:contain;border-radius:10px;margin-bottom:10px;background:var(--bg-soft)}
.vocab-fallback{width:100%;height:175px;border-radius:10px;margin-bottom:10px;background:linear-gradient(135deg,var(--brand-soft),var(--bg-soft));display:grid;place-items:center;font-size:3.2rem;font-weight:800;color:var(--brand);border:1px dashed var(--brand-2)}
.thumb{width:64px;height:48px;object-fit:contain;border-radius:8px;margin-inline-end:8px;vertical-align:middle}
/* Landing: book library */
.book-group{margin-bottom:22px}
.book-group-title{font-size:1.05rem;margin:0 0 10px}
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.book-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s ease}
.book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.book-cover{position:relative;height:250px;background:linear-gradient(135deg,var(--brand),var(--accent));display:grid;place-items:center;overflow:hidden}
.book-cover .book-initials{font-size:2.8rem;font-weight:800;color:#fff;letter-spacing:.05em}
.book-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.book-card .body{padding:16px;display:flex;flex-direction:column;gap:8px;flex:1}
.book-card h3{font-size:1.08rem}
.book-card .lvl{font-size:.8rem;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.step .e{font-size:1.7rem}
.rank-hero{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.rank-hero .big{font-size:2.4rem}
.ex-hint{font-size:.8rem;color:var(--muted);margin:6px 0}
.ex-words .chip[draggable="true"],.ex-answer .chip[draggable="true"]{cursor:grab}
.ex-answer.drag-over{border-color:var(--brand-2);background:var(--brand-soft)}
.ex-words.drag-over{outline:2px dashed var(--brand-2);border-radius:10px}
.vocab-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.vocab-head h2{margin:0}
.toggle-btn{display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;padding:5px 12px 5px 6px;font-weight:800;font-size:.85rem;min-height:42px}
.toggle-btn .t-cap{font-weight:800;color:var(--muted)}
.toggle-btn .track{width:46px;height:25px;border-radius:999px;background:var(--bg-soft);border:1px solid var(--line);position:relative;transition:background .2s;flex-shrink:0}
.toggle-btn .knob{position:absolute;top:2px;inset-inline-start:2px;width:19px;height:19px;border-radius:50%;background:var(--muted);transition:inset-inline-start .2s,background .2s}
.toggle-btn[aria-pressed="true"] .track{background:var(--ok)}
.toggle-btn[aria-pressed="true"] .knob{inset-inline-start:23px;background:#fff}
.toggle-btn .t-state{min-width:32px;text-align:start}
[data-theme="dark"] .toggle-btn[aria-pressed="true"] .knob{background:#052e16}
/* Auth: avatar, dropdown, login form, guest banner */
#authArea{display:flex;align-items:center}
.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;font-size:1.05rem;border:0;min-width:42px}
.user-menu{position:relative}
.user-drop{position:absolute;top:50px;inset-inline-end:0;width:250px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:14px;display:none;z-index:90}
.user-drop.open{display:block}
.user-drop .u-email{font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.user-drop .u-sub{font-size:.8rem;color:var(--muted);margin:2px 0 10px}
.auth-form{display:grid;gap:10px;margin:12px 0}
.auth-form label{display:grid;gap:5px;font-size:.88rem;font-weight:600}
.auth-form input{padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--card);color:var(--text);font-size:.95rem;font-family:inherit}
.auth-form select{padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--card);color:var(--text);font-size:.95rem;font-family:inherit;min-height:48px;width:100%}
.auth-form select:focus{outline:2px solid var(--brand-2);outline-offset:1px;border-color:var(--brand-2)}
.guest-banner{border-inline-start:5px solid var(--brand-2);display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:space-between}

/* AI tutor */
.ai-box{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ai-msgs{max-height:280px;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:9px;background:var(--bg)}
.msg{max-width:85%;padding:10px 13px;border-radius:12px;font-size:.9rem}
.msg.ai{background:var(--card);border:1px solid var(--line);align-self:flex-start}
.msg.me{background:var(--brand);color:#fff;align-self:flex-end}
.ai-input{display:flex;gap:8px;padding:10px;background:var(--card)}
.ai-input input{flex:1;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;font-size:.9rem;background:var(--card);color:var(--text)}

/* Graphical "AI is thinking" indicator (replaces the plain …). */
.typing-dots{display:inline-flex;align-items:center;gap:6px;padding:6px 2px}
.typing-dots span{width:9px;height:9px;border-radius:50%;background:var(--brand-2);opacity:.35;animation:tdot 1.1s infinite}
.typing-dots span:nth-child(2){animation-delay:.18s}
.typing-dots span:nth-child(3){animation-delay:.36s}
@keyframes tdot{0%,60%,100%{transform:translateY(0);opacity:.35}30%{transform:translateY(-6px)scale(1.15);opacity:1}}
.typing-wrap{display:inline-flex;align-items:center;gap:9px;color:var(--muted);font-size:.85rem}
.typing-wrap .robot{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--brand-soft);border:1px solid var(--brand-2);animation:trobot 1.6s ease-in-out infinite}
@keyframes trobot{0%,100%{transform:rotate(-8deg)}50%{transform:rotate(8deg) scale(1.06)}}

/* Global AI Teacher drawer: slides in from the right, full height. */
.ai-drawer-back{position:fixed;inset:0;background:rgba(10,15,35,.5);z-index:160}
.ai-drawer-back[hidden]{display:none}
.ai-drawer{position:fixed;top:0;bottom:0;inset-inline-end:0;width:400px;max-width:94vw;height:100dvh;background:var(--card);border-inline-start:1px solid var(--line);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;transform:translateX(105%);transition:transform .28s ease}
[dir="rtl"] .ai-drawer{transform:translateX(-105%)}
.ai-drawer-back.open .ai-drawer{transform:translateX(0)}
.ai-drawer-head{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line)}
.ai-drawer-gate{margin:10px 12px 0}
.ai-drawer-msgs{flex:1;max-height:none;margin:10px 12px;border:1px solid var(--line);border-radius:12px}
.ai-drawer-input{border-top:1px solid var(--line);padding:10px 12px calc(10px + env(safe-area-inset-bottom))}
body.ai-open{overflow:hidden}
@media (max-width:500px){
  .ai-drawer{width:100%;max-width:100%;border-inline-start:0}
  .ai-drawer-msgs{border:0;border-radius:0;margin:8px 0}
}

/* Story + conversation */
.story-para{margin:0 0 12px;line-height:1.75}
.chat{border:1px solid var(--line);border-radius:12px}
.chat-name{font-size:.72rem;opacity:.75}
.msg .translated{display:block;margin-top:4px}
.msg.me .translated{color:rgba(255,255,255,.88)}
.msg.me .speak{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.45)}
/* Rich AI answers: paragraphs, lists, quotes, code, small tables */
.msg p{margin:0 0 6px}
.msg p:last-child{margin-bottom:0}
.md-list{margin:4px 0 4px 18px;padding:0}
.md-list li{margin:2px 0}
.md-quote{border-inline-start:3px solid currentColor;padding-inline-start:8px;opacity:.92}
.msg code{background:rgba(128,128,128,.28);padding:1px 6px;border-radius:6px;font-size:.85em}
.md-scroll{overflow-x:auto;margin:8px 0}
.md-hr{border:0;border-top:1px solid rgba(128,128,128,.45);margin:8px 0}.md-table{width:100%;border-collapse:collapse;font-size:.82rem}
.md-table th,.md-table td{border:1px solid rgba(128,128,128,.55);padding:5px 8px;text-align:start;vertical-align:top}
.md-table th{background:rgba(128,128,128,.2)}

/* Lesson nav */
.lesson-nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between;margin:22px 0}
.mode-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.mode-tabs button{border:1.5px solid var(--line);background:var(--card);color:var(--text);border-radius:99px;padding:8px 15px;font-weight:700;font-size:.85rem;min-height:40px}
.mode-tabs button.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.obj-list{margin:8px 0 0 20px}
/* Word games */
.game-card{border:1.5px dashed var(--brand-2);border-radius:12px;padding:16px;margin:14px 0;background:color-mix(in srgb,var(--brand-soft) 40%,var(--card))}
/* Writing */
.write-task{border:1px solid var(--line);border-radius:12px;padding:14px;margin:12px 0;background:var(--card)}
.write-task h3{margin-bottom:4px}
.write-count{font-size:.82rem;color:var(--muted);margin:6px 0 0}
/* Virtual cumulative reviews */
.hero-review{background:linear-gradient(120deg,#4c1d95,#7c3aed 55%,#0d9488);color:#fff}
.hero-review p{color:rgba(255,255,255,.88)}
.side-lesson.review-entry{border-inline-start:3px solid var(--warn);background:linear-gradient(90deg,var(--warn-soft),transparent)}
.side-lesson.review-entry .t{font-weight:700}
.lesson-card.review-card-entry{border:1.5px dashed var(--warn)}
.lesson-card.review-card-entry .band{background:linear-gradient(180deg,var(--warn),#f97316)}
/* Celebration: lesson-complete trophy + confetti */
.celebrate-back{position:fixed;inset:0;z-index:400;background:rgba(10,15,35,.55);backdrop-filter:blur(3px);display:grid;place-items:center;padding:18px;opacity:0;transition:opacity .25s}
.celebrate-back.open{opacity:1}
.celebrate-card{position:relative;max-width:480px;width:100%;border-radius:22px;padding:30px 26px 24px;text-align:center;color:#fff;box-shadow:0 24px 70px rgba(0,0,0,.45);transform:scale(.85) translateY(14px);transition:transform .3s cubic-bezier(.2,1.4,.4,1);text-shadow:0 1px 2px rgba(0,0,0,.25)}
.celebrate-back.open .celebrate-card{transform:scale(1) translateY(0)}
.cel-trophy{font-size:4.4rem;line-height:1;animation:cel-bounce 1.1s ease infinite alternate;filter:drop-shadow(0 6px 12px rgba(0,0,0,.3))}
@keyframes cel-bounce{from{transform:translateY(0) scale(1)}to{transform:translateY(-9px) scale(1.06)}}
.cel-kicker{margin-top:8px;font-size:.8rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;opacity:.92}
.cel-title{margin:4px 0 6px;font-size:1.9rem}
.cel-sub{font-size:.95rem;opacity:.95}
.cel-xp{margin:8px 0 2px;font-size:.92rem}
.cel-badges{margin:6px 0;font-size:.9rem;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.4);border-radius:10px;padding:8px 10px}
.cel-btns{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.btn-light{background:#fff;color:#1e1b4b;border:0;border-radius:10px;padding:10px 16px;font-weight:800;min-height:44px;text-decoration:none}
.btn-ghost-light{background:rgba(255,255,255,.16);color:#fff;border:1.5px solid rgba(255,255,255,.6);border-radius:10px;padding:10px 14px;font-weight:700;min-height:44px;text-decoration:none}
.cel-close{position:absolute;top:10px;inset-inline-end:10px;width:36px;height:36px;border-radius:50%;border:0;background:rgba(0,0,0,.28);color:#fff;font-size:1rem;min-width:36px}
.confetti-canvas{position:fixed;inset:0;z-index:399;pointer-events:none}
@media (prefers-reduced-motion:reduce){.cel-trophy{animation:none}.celebrate-card{transition:none}}
.translated{color:var(--muted);font-size:.85rem}

/* Synonyms & Antonyms + "Instead of Very…" (js/word-relations.js) */
.rel-table-wrap{overflow:auto;margin:10px 0;border:1px solid var(--line);border-radius:12px}
.rel-table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
.rel-table th,.rel-table td{border-bottom:1px solid var(--line);padding:9px 12px;text-align:start;vertical-align:top}
.rel-table thead th{background:var(--bg-soft);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;border-bottom:1.5px solid var(--line)}
.rel-table tbody tr:last-child th,.rel-table tbody tr:last-child td{border-bottom:0}
.rel-table tbody tr:nth-child(even){background:color-mix(in srgb,var(--bg-soft) 45%,transparent)}
.rel-tag{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:8px;font-weight:800;font-size:.85rem;margin-inline-end:4px;vertical-align:middle}
.rel-tag.syn{background:var(--ok-soft);color:var(--ok)}
.rel-tag.ant{background:var(--bad-soft);color:var(--bad)}
.rel-none{color:var(--muted)}
.very-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin-top:10px}
.very-card{border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:var(--card);text-align:center}
.very-from{font-size:.9rem;color:var(--muted)}
.very-from::before{content:"🗣 "}
.very-arrow{color:var(--brand-2);font-weight:800;line-height:1.2}
.very-to{font-size:1.05rem;margin:2px 0 6px;display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap}
.very-ex{font-size:.85rem;color:var(--muted);font-style:italic;margin-top:6px}
[data-theme="dark"] .rel-tag.syn{color:#86efac}
[data-theme="dark"] .rel-tag.ant{color:#fca5a5}
@media (max-width:560px){
  .rel-table{font-size:.86rem;min-width:460px}
  .very-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:400px){
  .very-grid{grid-template-columns:1fr}
}

/* Study path checklist + collapsible Explore sections (js/lesson.js) */
.path-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px;margin:10px 0 4px}
.path-item{display:flex;align-items:center;gap:10px;border:1.5px solid var(--line);background:var(--card);color:var(--text);border-radius:12px;padding:10px 12px;font-weight:700;font-size:.9rem;font-family:inherit;min-height:50px;width:100%;text-align:start}
.path-item:hover:not(.done){border-color:var(--brand-2)}
.path-item.done{border-color:var(--ok);background:var(--ok-soft)}
.path-item .p-dot{font-weight:800;color:var(--brand-2)}
.path-item.done .p-dot{color:var(--ok)}
.path-item .p-min{margin-inline-start:auto;font-size:.76rem;color:var(--muted);font-weight:600;white-space:nowrap}
.panel-coll > .coll-head{display:flex;align-items:center;gap:10px;width:100%;background:none;border:0;color:var(--text);font-family:inherit;font-size:1.15rem;font-weight:800;text-align:start;padding:0;margin:0 0 4px;min-height:48px}
.panel-coll > .coll-head:hover .coll-chev{background:var(--brand-soft)}
.coll-chev{margin-inline-start:auto;display:inline-grid;place-items:center;width:34px;height:34px;min-width:34px;border-radius:10px;border:1.5px solid var(--line);color:var(--brand-2);font-size:1rem;transition:transform .2s}
.coll-head[aria-expanded="true"] .coll-chev{transform:rotate(90deg)}
@media (prefers-reduced-motion:reduce){.coll-chev{transition:none}}
[data-theme="dark"] .path-item.done .p-dot{color:#86efac}