/* Help-center layout and article components for the handbook. Needs base.css. */

/* ---------- site header ---------- */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header .inner{max-width:1240px;margin:0 auto;padding:0 16px;height:66px;display:flex;align-items:center;gap:20px}
@media (min-width:700px){.site-header .inner{padding:0 28px}}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);flex:none}
.brand:hover{color:var(--ink)}
.brand-logo{width:36px;height:36px;border-radius:8px;display:block}
.brand-name{display:none}
@media (min-width:600px){.brand-name{display:block}}
@media (max-width:420px) and (min-width:401px){.brand-logo{width:32px;height:32px}}
.footer-logo{width:44px;height:44px;border-radius:10px;margin:0 auto 12px;display:block}
.brand b{display:block;font-weight:700;font-size:1rem;letter-spacing:-.01em;line-height:1.2}
.brand small{display:block;font-size:.76rem;color:var(--muted);line-height:1.2}
.site-nav{display:none;gap:4px;margin-left:12px}
@media (min-width:900px){.site-nav{display:flex}}
.site-nav a{padding:8px 12px;border-radius:9px;text-decoration:none;color:var(--muted);font-weight:500;font-size:.93rem}
.site-nav a:hover{color:var(--ink);background:var(--sunken)}
.site-nav a[aria-current="page"]{color:#fff;background:var(--grad-primary)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.header-actions .btn{padding:8px 14px;font-size:.88rem}
.header-actions .ask-label{display:none}
@media (min-width:560px){.header-actions .ask-label{display:inline}}
.menu-btn{display:inline-grid}
@media (min-width:900px){.menu-btn{display:none}}
.mobile-nav{border-top:1px solid var(--line);background:#fff;padding:10px 16px 16px;display:grid;gap:2px;max-height:calc(100dvh - 66px);overflow-y:auto;overscroll-behavior:contain}
.mobile-nav a{padding:10px 12px;border-radius:9px;text-decoration:none;color:var(--ink);font-weight:500}
.mobile-nav a:hover{background:var(--sunken)}
@media (min-width:900px){.mobile-nav{display:none!important}}
.mobile-nav .mobile-ask{margin-top:8px;border-top:1px solid var(--line);border-radius:0;padding-top:14px;color:var(--primary);font-weight:600}
/* Phones: tighten the header so logo, language switch, Ask and menu fit on one row. */
@media (max-width:599px){
  .site-header .inner{gap:10px}
  .header-actions{gap:6px}
  .header-actions .btn{padding:8px 11px}
  .site-lang button{padding:5px 8px}
}
@media (max-width:400px){.brand-logo{width:30px;height:30px}}
/* Very narrow phones: Ask moves into the menu. */
@media (max-width:360px){.header-actions .ask-btn{display:none}}

/* ---------- page layout ---------- */
.layout{max-width:1240px;margin:0 auto;padding:0 16px;display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
@media (min-width:700px){.layout{padding:0 28px}}
@media (min-width:1000px){.layout{grid-template-columns:230px minmax(0,1fr)}}
@media (min-width:1240px){.layout.has-toc{grid-template-columns:230px minmax(0,1fr) 200px}}
.layout.home{display:block;max-width:none;padding:0}
main.lesson{min-width:0;padding-block:28px 72px;display:flex;flex-direction:column;gap:28px}
.layout:not(.home) main.lesson{max-width:780px}
.layout.home main.lesson{padding:0;gap:0}

/* topic sidebar (left) */
.sidebar{display:none}
@media (min-width:1000px){.sidebar{display:block;position:sticky;top:90px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;padding:28px 0 24px}}
.layout.home .sidebar{display:none}
.side-title{font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding:0 10px 10px}
.side-list{display:flex;flex-direction:column;gap:2px}
.side-link{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;text-decoration:none;color:var(--muted);font-size:.9rem;font-weight:500;line-height:1.3;border:1px solid transparent}
.side-link:hover{background:var(--surface);color:var(--ink)}
.side-link[aria-current="page"]{background:var(--grad-primary);color:#fff;box-shadow:none;border-color:transparent}
.side-link[aria-current="page"] .i{color:#fff}
.status{width:18px;flex:none;text-align:center;font-size:.8rem;font-weight:700;color:var(--faint);font-variant-numeric:tabular-nums}
.side-link[aria-current="page"] .status{color:#fff}
.status.done{width:20px;height:20px;border-radius:50%;background:var(--grad-done);color:#fff;display:grid;place-items:center;font-size:.68rem}
.side-link[aria-current="page"] .status.done{background:#fff;color:var(--primary)}
.side-sep{height:1px;background:var(--line);margin:14px 10px}

/* on this page (right) */
.toc{display:none}
@media (min-width:1240px){.toc{display:block;position:sticky;top:90px;align-self:start;padding:28px 0}}
.toc .side-title{padding-left:12px}
.toc a{display:block;padding:5px 12px;border-left:2px solid var(--line);color:var(--muted);text-decoration:none;font-size:.86rem;line-height:1.4}
.toc a:hover{color:var(--ink)}
.toc a.active{border-left-color:#1A44AE;background:var(--grad-primary);color:#fff;font-weight:600;border-radius:0 8px 8px 0}

/* ---------- article ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.86rem;color:var(--muted)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:var(--faint)}
.lesson-head{display:grid;gap:14px}
.lesson-head .lede{font-size:1.1rem;color:var(--muted);max-width:64ch}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.86rem;color:var(--muted);align-items:center}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta .i{width:16px;height:16px}
.learn-box{background:var(--tint);border:1px solid var(--tint-strong);border-radius:var(--radius);padding:18px 20px;display:grid;gap:10px}
.learn-box h2{font-size:1rem;color:var(--primary)}
.learn-box ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.learn-box li{display:flex;gap:10px;align-items:flex-start}
.learn-box li .i{color:var(--primary);margin-top:3px;width:18px;height:18px}
.block{display:flex;flex-direction:column;gap:16px;scroll-margin-top:90px}
.block-head{display:grid;gap:6px}
.block-head h2{display:flex;align-items:center;gap:10px}
.block-head h2::before{content:"";width:4px;height:1.1em;border-radius:2px;background:var(--primary);flex:none}
.block-head p{color:var(--muted)}
.prose{display:grid;gap:12px;max-width:68ch}

/* lesson footer */
.lesson-foot{display:flex;flex-direction:column;gap:18px;border-top:1px solid var(--line);padding-top:28px}
.takeaways{background:var(--done-soft);border:1px solid var(--done-line);border-radius:var(--radius);padding:18px 20px;display:grid;gap:10px}
.takeaways h2{font-size:1rem;color:var(--done-ink)}
.takeaways ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.takeaways li{display:flex;gap:10px;align-items:flex-start}
.takeaways li .i{color:var(--done);margin-top:3px;width:18px;height:18px}
.complete-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px}
.complete-row p{font-weight:600}
.complete-row .note{font-size:.84rem;color:var(--muted);font-weight:400}
.complete-row .btn{margin-left:auto}
.btn.is-done{background:var(--done-ink);border-color:var(--done-ink);color:#fff}
.pager{display:grid;gap:12px;grid-template-columns:1fr}
@media (min-width:600px){.pager{grid-template-columns:1fr 1fr}}
.pager a{display:grid;gap:2px;padding:15px 18px;border:1px solid var(--line);border-radius:14px;background:var(--surface);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-sm)}
.pager a:hover{border-color:var(--primary);color:var(--ink)}
.pager a.next{text-align:right}
.pager a.next:only-child{grid-column:2}
@media (max-width:599px){.pager a.next:only-child{grid-column:1}}
.pager .dir{font-size:.8rem;color:var(--muted)}
.pager b{font-weight:600;color:var(--primary)}
.help-strip{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;justify-content:space-between;background:var(--surface);border:1px dashed var(--line-strong);border-radius:var(--radius);padding:16px 18px}
.help-strip p{color:var(--muted)}
.help-strip b{color:var(--ink)}

/* ---------- home ---------- */
.hero{background:
    radial-gradient(1200px 400px at 85% -10%, rgba(59,116,240,.20), transparent 60%),
    radial-gradient(900px 360px at 0% 0%, rgba(36,87,214,.12), transparent 60%),
    linear-gradient(180deg,#EAF1FE 0%, #F6F8FC 100%);
  border-bottom:1px solid var(--line);padding:56px 16px 72px;position:relative}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(36,87,214,.10) 1px, transparent 1px);background-size:22px 22px;mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 80%);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 80%);pointer-events:none}
.hero .inner{position:relative;z-index:3;max-width:760px;margin:0 auto;text-align:center;display:grid;gap:18px;justify-items:center}
.hero h1{font-size:clamp(2rem,4.6vw,3rem);letter-spacing:-.03em}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero p{font-size:1.1rem;color:var(--muted);max-width:56ch}
.hero-search{position:relative;width:100%;max-width:640px;margin-top:6px}
.hero-search input{font:inherit;font-size:1.05rem;width:100%;padding:17px 20px 17px 54px;border-radius:14px;border:1px solid var(--line-strong);background:#fff;color:var(--ink);box-shadow:var(--shadow-lg)}
.hero-search input:focus{outline:none;border-color:var(--primary);box-shadow:var(--shadow-lg),0 0 0 4px var(--primary-soft)}
.hero-search > .i{position:absolute;left:19px;top:50%;transform:translateY(-50%);color:var(--primary);width:22px;height:22px;z-index:1}
.popular{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;font-size:.88rem;color:var(--muted)}
.popular .chip{background:rgba(255,255,255,.85)}
.search-results{position:absolute;left:0;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:6px;z-index:20;max-height:420px;overflow:auto;text-align:left}
.search-results a{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;padding:10px 12px;border-radius:10px;text-decoration:none;color:var(--ink)}
.search-results a:hover,.search-results a.active{background:var(--tint)}
.search-results .kind{grid-row:1/3;align-self:center;font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--primary);background:var(--tint);border-radius:6px;padding:3px 7px;min-width:70px;text-align:center}
.search-results a:hover .kind,.search-results a.active .kind{background:#fff}
.search-results b{font-weight:600;font-size:.94rem}
.search-results .sub{font-size:.82rem;color:var(--muted)}
.search-results p{padding:12px;color:var(--muted);font-size:.9rem}

.home-wrap{max-width:1180px;margin:0 auto;padding:0 16px 80px;display:flex;flex-direction:column;gap:56px}
@media (min-width:700px){.home-wrap{padding:0 28px 80px}}
.section-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:8px 20px;margin-bottom:20px}
.section-head h2{font-size:1.5rem;letter-spacing:-.02em}
.section-head p{color:var(--muted)}

.start-banner{margin-top:-38px;position:relative;z-index:2;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:20px 22px;display:grid;gap:16px;align-items:center}
@media (min-width:760px){.start-banner{grid-template-columns:auto 1fr auto}}
.start-ring{width:64px;height:64px;flex:none}
.start-banner h2{font-size:1.1rem}
.start-banner p{color:var(--muted);font-size:.92rem}
.start-steps{display:flex;gap:6px;margin-top:10px}
.start-steps span{height:6px;flex:1;max-width:48px;border-radius:999px;background:var(--sunken)}
.start-steps span.on{background:var(--done)}

.topic-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.topic-card{position:relative;display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow-sm);transition:transform .15s, box-shadow .15s, border-color .15s}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--tint-strong);color:var(--ink)}
.topic-icon{display:block;color:var(--primary);line-height:0}
.topic-icon .i{width:30px;height:30px;stroke-width:1.6}
.topic-card h3{font-size:1.08rem}
.topic-card p{font-size:.9rem;color:var(--muted);flex:1}
.topic-meta{display:flex;align-items:center;justify-content:space-between;font-size:.8rem;color:var(--muted);padding-top:10px;border-top:1px solid var(--line)}
.topic-num{position:absolute;top:18px;right:20px;font-size:.78rem;font-weight:700;color:var(--faint)}
.topic-card.done .topic-num{color:var(--done-ink)}

.guides-list{display:grid;gap:10px;grid-template-columns:1fr}
@media (min-width:760px){.guides-list{grid-template-columns:1fr 1fr}}
.guide-link{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.guide-link:hover{border-color:var(--primary);color:var(--ink)}
.guide-link .gi{width:26px;flex:none;color:var(--primary);font-weight:700;font-size:1.05rem;text-align:center;font-variant-numeric:tabular-nums}
.guide-link b{display:block;font-weight:600}
.guide-link span{display:block;font-size:.82rem;color:var(--muted)}
.guide-link .arrow{margin-left:auto;color:var(--faint)}
.guide-link:hover .arrow{color:var(--primary)}

.voices{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.voice{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:12px}
.voice .mark{font-family:Georgia, "Times New Roman", serif;font-size:3rem;line-height:.6;color:var(--tint-strong);height:22px}
.voice p{font-size:1rem;line-height:1.6}
.voice span{font-size:.82rem;color:var(--muted);margin-top:auto}

.survey-strip{background:linear-gradient(135deg,#1F4FCB,#2F6BEA);color:#fff;border-radius:22px;padding:28px;display:grid;gap:22px;align-items:center}
@media (min-width:860px){.survey-strip{grid-template-columns:1.1fr 2fr}}
.survey-strip h2{color:#fff;font-size:1.35rem}
.survey-strip p{color:rgba(255,255,255,.85);font-size:.95rem;margin-top:6px}
.survey-nums{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
.survey-nums div{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:14px 16px}
.survey-nums b{display:block;font-size:1.9rem;font-weight:700;letter-spacing:-.02em;line-height:1.1;font-variant-numeric:tabular-nums}
.survey-nums span{font-size:.84rem;color:rgba(255,255,255,.88)}
.survey-strip details{grid-column:1/-1}
.survey-strip details summary{cursor:pointer;color:#fff;font-size:.88rem;font-weight:600}
.survey-strip .tbl-pair{background:#fff;color:var(--ink);border-radius:14px;padding:12px 16px;margin-top:12px}

.help-card{display:grid;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow-sm)}
@media (min-width:760px){.help-card{grid-template-columns:auto 1fr auto}}
.help-card .hc-icon{display:block;color:var(--primary);line-height:0}
.help-card .hc-icon .i{width:40px;height:40px;stroke-width:1.5}
.help-card p{color:var(--muted)}
.site-footer{border-top:1px solid var(--line);padding:24px 16px 40px;text-align:center;font-size:.84rem;color:var(--muted)}

/* tables */
.tbl-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.88rem}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
th{font-weight:600;color:var(--muted);font-size:.8rem}
tbody tr:last-child td{border-bottom:none}
.tbl-pair{display:grid;gap:16px}
@media (min-width:700px){.tbl-pair{grid-template-columns:1.4fr 1fr}}

/* ---------- checklist ---------- */
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.checklist label{display:flex;gap:12px;align-items:flex-start;padding:13px 15px;background:#fff;border:1px solid var(--line);border-radius:12px;cursor:pointer}
.checklist label:hover{border-color:var(--primary)}
.checklist input{margin-top:4px;width:18px;height:18px;accent-color:var(--primary);flex:none}
.checklist input:checked + span{color:var(--muted)}
.checklist small{display:block;color:var(--muted);font-size:.86rem}

/* ---------- prompting ---------- */
.formula{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:10px}
.part{background:#fff;border:1px solid var(--line);border-top:3px solid var(--primary);border-radius:12px;padding:14px;display:grid;gap:4px;align-content:start}
.part .k{font-family:var(--font-mono);font-size:.72rem;font-weight:500;color:var(--primary)}
.part b{font-weight:700}
.part span{font-size:.85rem;color:var(--muted)}
.compare{display:grid;gap:12px}
@media (min-width:700px){.compare{grid-template-columns:1fr 1.6fr}}
.compare > div{border-radius:14px;padding:15px 17px;display:grid;gap:6px;border:1px solid var(--line);background:#fff}
.compare .bad{background:var(--sunken)}
.compare .bad .label{color:var(--muted)}
.compare .good{border-color:var(--done);background:var(--done-soft)}
.compare .good .label{color:var(--done-ink)}
.compare p{font-family:var(--font-mono);font-size:.82rem}
.builder{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:grid;gap:16px;box-shadow:var(--shadow-sm)}
.builder-grid{display:grid;gap:14px}
@media (min-width:700px){.builder-grid{grid-template-columns:1fr 1fr}}
.builder-grid .full{grid-column:1/-1}
.tip-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.tip-grid div{padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:14px;font-size:.92rem;color:var(--muted)}
.tip-grid b{display:block;font-weight:700;color:var(--ink);margin-bottom:2px}

/* ---------- tools ---------- */
.tools{display:grid;gap:14px}
@media (min-width:700px){.tools{grid-template-columns:1fr 1fr}}
.tool{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:grid;gap:10px;align-content:start;box-shadow:var(--shadow-sm)}
.tool:hover{border-color:var(--tint-strong)}
.tool-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.usage{font-size:.78rem;color:var(--muted)}
.usage b{color:var(--primary)}
.tool p{font-size:.93rem}
.tool ul{margin:0;padding-left:18px;font-size:.88rem;color:var(--muted);display:grid;gap:3px}
.tool ul b{color:var(--ink)}
.tool .try{font-family:var(--font-mono);font-size:.77rem;background:var(--code);border:1px solid var(--line);padding:10px 12px;border-radius:10px}
.tool a{font-size:.88rem;font-weight:600}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.others{display:grid;gap:14px 28px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));font-size:.92rem;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
.others b{font-weight:700}

/* ---------- guides ---------- */
.guides{display:grid;gap:10px}
details.guide{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);scroll-margin-top:90px}
details.guide[open]{border-color:var(--tint-strong)}
details.guide summary{list-style:none;cursor:pointer;padding:16px 18px;display:grid;grid-template-columns:1fr auto;gap:2px 16px;align-items:center}
details.guide summary::-webkit-details-marker{display:none}
details.guide summary .uses{font-size:.86rem;color:var(--muted)}
details.guide summary .chev{grid-row:1/3;grid-column:2;width:30px;height:30px;border-radius:50%;background:var(--tint);color:var(--primary);display:grid;place-items:center;transition:transform .2s;font-size:.8rem}
details.guide[open] summary .chev{transform:rotate(180deg)}
.guide-body{padding:0 18px 20px;display:grid;gap:16px}
.steps{margin:0;padding:0;list-style:none;counter-reset:s;display:grid;gap:10px}
.steps li{counter-increment:s;display:grid;grid-template-columns:32px 1fr;gap:10px}
.steps li::before{content:counter(s);width:26px;height:26px;border-radius:50%;background:var(--grad-primary);color:#fff;font-size:.78rem;font-weight:700;display:grid;place-items:center}

/* ---------- prompt library ---------- */
.lib{display:grid;gap:16px}
.pcard{display:grid;gap:8px}
.pcard-h{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.pcard-h b{font-weight:700}
.empty{color:var(--muted);padding:12px 0}

/* ---------- students / responsible ---------- */
.levels{display:grid;gap:12px}
.level{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:grid;gap:10px;box-shadow:var(--shadow-sm)}
.level .k{font-family:var(--font-mono);font-size:.74rem;color:var(--primary);font-weight:500}
.panels{display:grid;gap:14px}
@media (min-width:760px){.panels{grid-template-columns:1fr 1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:grid;gap:10px;align-content:start}
.panel ul{margin:0;padding-left:18px;display:grid;gap:8px;font-size:.93rem}
.panel ul b{font-weight:700}
.check-grid{list-style:none;margin:0;padding:0;display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.check-grid li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:13px 15px;font-size:.92rem;color:var(--muted)}
.check-grid b{display:block;font-weight:700;color:var(--ink)}
.dodont{display:grid;gap:12px}
@media (min-width:700px){.dodont{grid-template-columns:1fr 1fr}}
.dodont > div{border-radius:14px;padding:15px 17px;display:grid;gap:8px}
.dodont .no{background:var(--warn-soft);border:1px solid var(--warn-line)}
.dodont .yes{background:var(--done-soft);border:1px solid var(--done-line)}
.dodont h3{font-size:.98rem}
.dodont .no h3{color:var(--warn)}
.dodont .yes h3{color:var(--done-ink)}
.dodont ul{margin:0;padding-left:18px;display:grid;gap:6px;font-size:.92rem}

/* ---------- tips & glossary ---------- */
.wall{columns:1;column-gap:14px}
@media (min-width:760px){.wall{columns:2}}
.quote{break-inside:avoid;margin:0 0 14px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:grid;gap:8px}
.gloss{margin:0;display:grid;background:#fff;border:1px solid var(--line);border-radius:16px;padding:4px 20px}
.gloss div{padding:14px 0;border-bottom:1px solid var(--line);display:grid;gap:2px}
.gloss div:last-child{border-bottom:none}
@media (min-width:700px){.gloss div{grid-template-columns:200px 1fr;gap:20px}}
.gloss dt{font-weight:700}
.gloss dd{margin:0;color:var(--muted)}

/* ---------- video player ---------- */
.video-card{display:grid;gap:12px}
.video-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px}
.lang-switch{display:inline-flex;background:var(--sunken);border:1px solid var(--line);border-radius:10px;padding:3px;margin-left:auto}
.lang-switch button{font:inherit;font-size:.86rem;font-weight:600;padding:6px 14px;border-radius:8px;border:0;background:transparent;color:var(--muted);cursor:pointer}
.lang-switch button[aria-pressed="true"]{background:var(--grad-primary);color:#fff;box-shadow:none}
.video-frame{position:relative;aspect-ratio:16/9;max-width:100%;background:#0F1B2D;border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.video-frame video{width:100%;height:100%;display:block;background:#0F1B2D}
.video-missing{position:absolute;inset:0;display:grid;place-items:center;padding:24px;text-align:center;color:#C9D6EE;font-size:.95rem}
.topic-video{display:inline-flex;align-items:center;gap:5px;color:var(--primary);font-weight:600}
.topic-video .i{width:14px;height:14px}

/* ---------- language switch (header) ---------- */
.site-lang{display:inline-flex;background:var(--sunken);border:1px solid var(--line);border-radius:10px;padding:3px}
.site-lang button{font:inherit;font-size:.82rem;font-weight:600;padding:5px 10px;border-radius:7px;border:0;background:transparent;color:var(--muted);cursor:pointer}
.site-lang button[aria-pressed="true"]{background:var(--grad-primary);color:#fff;box-shadow:none}
html[lang="th"] .hero h1{letter-spacing:0;line-height:1.35}
@media (pointer: coarse){
  .site-lang button,.lang-switch button{min-height:34px}
  .survey-strip details summary{padding:8px 0}
  .mobile-nav a{padding:12px}
}

/* ---------- Module 9: "which one" table, inline file names ---------- */
.which{background:#fff;border:1px solid var(--line);border-radius:14px}
.which table{font-size:.9rem;min-width:620px}
.which th,.which td{padding:11px 14px;vertical-align:top}
.which td:first-child{white-space:nowrap;color:var(--primary)}
.which td:last-child{color:var(--muted)}
.lesson code{font-family:var(--font-mono);font-size:.86em;background:var(--code);border:1px solid var(--line);border-radius:6px;padding:1px 5px}

/* ---------- Module 9: three tool panels ---------- */
@media (min-width:760px){.panels.three{grid-template-columns:1fr}}
.panel h3 span{font-weight:inherit}
.tip-grid a.btn-sm{display:inline-block;margin-top:10px;text-decoration:none;color:var(--primary);font-weight:600}