:root{
 --navy:#0a2d49;--blue:#1768d2;--teal:#08a58e;--green:#16845f;--gold:#f4c34b;
 --orange:#ef8c3c;--red:#ce4f4a;--pink:#d95a95;--ink:#17324d;--muted:#60768b;
 --line:#cbdbe6;--bg:#f2f8fb;--soft:#e9f5f9;--mint:#e8f8f3;--cream:#fff7df;--white:#fff;
}
*{box-sizing:border-box}html,body{margin:0;font-family:Inter,Arial,"Noto Sans Thai",sans-serif;background:var(--bg);color:var(--ink)}
button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit}.hidden{display:none!important}
.top{position:sticky;top:0;z-index:50;background:linear-gradient(90deg,#071f33,#0d4267);color:#fff;padding:11px 14px;box-shadow:0 3px 16px rgba(5,26,45,.16)}
.topin{max-width:1180px;margin:auto;display:flex;gap:12px;align-items:center;justify-content:space-between}
.brand{font-weight:950;font-size:18px}.meta{font-size:12px;color:#d4e7f2;margin-top:2px}.wrap{max-width:1180px;margin:14px auto;padding:0 12px 60px}
.panel,.card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 7px 24px rgba(16,56,83,.06)}
.panel{padding:18px;margin-bottom:13px}.card{padding:14px}.h1{font-size:clamp(28px,4vw,42px);line-height:1.08;color:var(--navy);font-weight:950;margin:0 0 8px}.h2{font-size:clamp(22px,3vw,30px);line-height:1.15;color:var(--navy);font-weight:950;margin:0 0 8px}.h3{font-size:18px;font-weight:900;color:var(--navy);margin:0 0 5px}
.lead{font-size:18px;line-height:1.55;color:var(--muted)}.eyebrow{font-size:12px;font-weight:950;text-transform:uppercase;letter-spacing:.08em;color:var(--blue)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
label{font-weight:850;font-size:13px}input,select,textarea{width:100%;margin-top:5px;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fff;color:var(--ink)}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.btn{border:0;border-radius:11px;padding:10px 14px;font-weight:900}.btn.big{font-size:17px;padding:12px 17px}.btn:disabled{opacity:.42;cursor:not-allowed}.teal{background:var(--teal);color:#fff}.blue{background:var(--blue);color:#fff}.navy{background:var(--navy);color:#fff}.gold{background:var(--gold);color:#31290d}.orange{background:var(--orange);color:#fff}.red{background:var(--red);color:#fff}.light{background:#eef5f8;color:var(--navy);border:1px solid var(--line)}
.status{margin-top:9px;padding:10px 12px;border-radius:10px;background:#eef5f8;font-weight:750;line-height:1.45}.status.ok{background:#e3f6ed;color:#086247}.status.err{background:#fdeaea;color:#89312d}.status.warn{background:#fff4d8;color:#765713}
.classnotes{background:var(--cream);border:1px solid #ead171;border-left:5px solid var(--gold);border-radius:13px;padding:12px 14px;line-height:1.55}.classnotes b{color:#7d5d00}
.th{background:var(--mint);border-left:4px solid var(--teal);padding:8px 10px;border-radius:9px;line-height:1.5;margin-top:6px}.en{font-size:18px;line-height:1.55}.small{font-size:12px;color:var(--muted)}
.progress{height:10px;background:#d9e7ed;border-radius:99px;overflow:hidden}.bar{height:100%;background:linear-gradient(90deg,var(--teal),var(--blue));width:0}
.pill{display:inline-block;padding:6px 10px;border-radius:999px;background:#eaf3f7;font-weight:900;color:var(--navy);font-size:12px}.pill.active{background:var(--teal);color:#fff}
.metric{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.metric .v{font-size:23px;font-weight:950;color:var(--teal)}
.notice{background:#fff7de;border:1px solid #ebd179;border-radius:12px;padding:11px 13px;line-height:1.5}
footer.dev{text-align:center;color:var(--muted);font-size:12px;margin-top:18px}
.aocrwrap{position:relative;isolation:isolate;overflow:hidden}.aocr{position:absolute;inset:0;z-index:0;pointer-events:none;background-image:repeating-linear-gradient(28deg,transparent 0 43px,rgba(12,44,71,.026) 43px 45px),radial-gradient(circle at 2px 2px,rgba(8,165,142,.045) 1px,transparent 1.2px);background-size:auto,18px 18px}.wm{position:absolute;inset:-80px;z-index:0;pointer-events:none;display:grid;grid-template-columns:repeat(3,1fr);gap:52px;transform:rotate(-24deg);opacity:.052;font-size:10px;font-weight:950;color:#17324d}.trace{position:absolute;right:7px;bottom:5px;z-index:3;color:#668098;font-size:9px}.inner{position:relative;z-index:2}.aocr.reduced{opacity:.35}.wm.reduced{opacity:.018}
@media(max-width:800px){.grid2,.grid3,.grid4,.metric{grid-template-columns:1fr}.topin{align-items:flex-start}.wrap{padding-bottom:80px}}
@media(prefers-contrast:more){.aocr{opacity:.25}.wm{opacity:.016}}
@media print{body{display:none!important}}

.strategyMap{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.strategyMap .card{border-top:5px solid var(--teal)}
.step{display:flex;gap:10px;align-items:flex-start;margin:8px 0}.stepNo{flex:0 0 32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:950}
.demoPassage{background:#fbfdfe;border:1px solid var(--line);border-radius:14px;padding:14px;line-height:1.75;font-size:17px}.demoPassage mark{background:#fff0a8;border-radius:4px;padding:0 2px}
.checkQ{padding:12px;border:1px solid var(--line);border-radius:13px;background:#fff;margin:9px 0}.opts{display:grid;gap:7px;margin-top:8px}.opt{border:1px solid var(--line);background:#f9fcfd;border-radius:10px;padding:10px;text-align:left;font-weight:800}.opt.sel{outline:3px solid rgba(23,104,210,.18);border-color:var(--blue)}.opt.good{background:#e5f7ee;border-color:#6ac59d}.opt.bad{background:#fdeceb;border-color:#e2a09c}
.feedback{margin-top:8px;padding:9px 10px;border-radius:9px;background:#eef5f8;line-height:1.45}
.scramble{border:1px solid var(--line);border-radius:15px;background:#fff;padding:13px;margin:9px 0}.wordbank,.answerline{display:flex;gap:7px;flex-wrap:wrap;min-height:48px;padding:9px;border-radius:10px}.wordbank{background:#f1f7fa}.answerline{background:#fff8df;border:1px dashed #d9b84c;margin-top:7px}.word{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 10px;font-weight:850}
.schedule{width:100%;border-collapse:collapse;background:#fff}.schedule th,.schedule td{border:1px solid var(--line);padding:9px;text-align:left}.schedule th{background:#eaf4f8;color:var(--navy)}
.canDo{display:grid;gap:8px}.canDo label{display:flex;gap:9px;align-items:flex-start;padding:11px;border:1px solid var(--line);border-radius:11px;background:#fff;font-size:15px}.canDo input{width:auto;margin:2px 0}
@media(max-width:800px){.strategyMap{grid-template-columns:1fr 1fr}}@media(max-width:520px){.strategyMap{grid-template-columns:1fr}}


/* ================================================================
   v1.2.0 SCREEN-FIT / ACCESSIBLE REFLOW
   Goal: enlarge reading text without making the whole page wider.
   Content reflows to the viewport; horizontal page scrolling is blocked.
   ================================================================ */
:root{--reader-scale:1}

/* Width safety: every major box is allowed to shrink inside the viewport. */
html,body{
  width:100%;
  max-width:100%;
  overflow-x:hidden;
}
body{
  min-width:0;
  text-size-adjust:100%;
  -webkit-text-size-adjust:100%;
}
.top,.topin,.wrap,.panel,.card,#lesson,#stage,
.grid2,.grid3,.grid4,.strategyMap,.row,
.step,.checkQ,.scramble,.wordbank,.answerline{
  min-width:0;
  max-width:100%;
}
.topin{
  width:100%;
  max-width:1180px;
  flex-wrap:wrap;
}
.brandBlock{
  flex:1 1 360px;
  min-width:0;
}
.brand,.meta,.h1,.h2,.h3,.lead,.status,.notice,.classnotes,.th,.en,
.demoPassage,.checkQ,.feedback,.canDo label,.word,.opt,td,th{
  overflow-wrap:anywhere;
  word-break:normal;
  hyphens:auto;
}
.wrap{
  width:min(1180px,100%);
  max-width:100%;
  margin:12px auto;
  padding-inline:clamp(8px,2vw,16px);
}
.panel{padding:clamp(12px,2.2vw,18px)}
.card{padding:clamp(11px,2vw,14px)}

/* Reflow before content becomes cramped. */
.grid2{
  grid-template-columns:repeat(auto-fit,minmax(min(100%,290px),1fr));
}
.grid3{
  grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));
}
.grid4{
  grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));
}
.strategyMap{
  grid-template-columns:repeat(auto-fit,minmax(min(100%,205px),1fr));
}

/* Built-in reading size scales text, not the whole page. */
.lead{font-size:calc(18px * var(--reader-scale))}
.classnotes,.notice,.status,.feedback{font-size:calc(15px * var(--reader-scale))}
.th{font-size:calc(15px * var(--reader-scale))}
.en{font-size:calc(18px * var(--reader-scale))}
.demoPassage{font-size:calc(17px * var(--reader-scale))}
.checkQ,.canDo label{font-size:calc(15px * var(--reader-scale))}
.opt,.word{font-size:calc(15px * var(--reader-scale))}
.schedule{font-size:calc(14px * var(--reader-scale))}
.step>div:last-child{font-size:calc(15px * var(--reader-scale))}
label{font-size:calc(13px * min(var(--reader-scale),1.18))}
input,select,textarea{font-size:calc(16px * min(var(--reader-scale),1.18))}
.btn{font-size:calc(15px * min(var(--reader-scale),1.18))}

/* Long words/buttons never force the viewport wider. */
.btn,.opt,.word,input,select,textarea{
  max-width:100%;
  white-space:normal;
}
.row>*{min-width:0}
.wordbank,.answerline{overflow:hidden}

/* Header reading controls */
.readerTools{
  flex:0 1 auto;
  min-width:0;
  display:flex;
  gap:6px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
}
.readerLabel{font-size:12px;font-weight:900;color:#d4e7f2}
.readerBtn{
  min-width:40px;
  border:1px solid rgba(255,255,255,.32);
  background:#fff;
  color:var(--navy);
  border-radius:9px;
  padding:7px 9px;
  font-weight:950;
}
.readerBtn.fit{min-width:86px}
.readerBtn.active{
  background:var(--gold);
  color:#31290d;
  border-color:var(--gold);
}

/* Navigation stays reachable even when enlarged text makes a screen tall. */
.lessonNav{
  position:sticky;
  bottom:0;
  z-index:35;
  margin-top:10px;
  padding:9px 10px;
  background:rgba(242,248,251,.96);
  border:1px solid var(--line);
  border-radius:13px;
  box-shadow:0 -5px 18px rgba(11,49,75,.08);
  backdrop-filter:blur(7px);
}
.navHint{
  flex:1 1 220px;
  min-width:0;
  text-align:center;
  font-size:12px;
  color:var(--muted);
  overflow-wrap:anywhere;
}

/* Keep table readable without making the whole page horizontally scroll. */
.schedule{
  width:100%;
  max-width:100%;
  table-layout:fixed;
}
.schedule th,.schedule td{
  min-width:0;
  overflow-wrap:anywhere;
}

/* Compact header and stack table as cards on narrow/zoomed layouts. */
@media(max-width:700px){
  .top{padding:8px 10px}
  .topin{gap:8px}
  .brandBlock{flex-basis:100%}
  .brand{font-size:16px}
  .meta{font-size:11px;line-height:1.35}
  .readerTools{width:100%;justify-content:flex-start}
  .readerLabel{display:none}
  .wrap{margin:8px auto;padding-inline:8px}
  .h1{font-size:clamp(25px,8vw,34px)}
  .h2{font-size:clamp(21px,6.5vw,28px)}
  .lessonNav{border-radius:11px}
  .navHint{display:none}

  .schedule,.schedule tbody,.schedule tr,.schedule td{
    display:block;
    width:100%;
  }
  .schedule thead{display:none}
  .schedule tr{
    margin:0 0 10px;
    padding:8px 10px;
    border:1px solid var(--line);
    border-radius:12px;
    background:#fff;
  }
  .schedule td{
    border:0;
    border-bottom:1px solid #e5eef3;
    padding:7px 3px;
  }
  .schedule td:last-child{border-bottom:0}
  .schedule td:nth-child(1)::before{content:"Service: ";font-weight:900;color:var(--navy)}
  .schedule td:nth-child(2)::before{content:"Day: ";font-weight:900;color:var(--navy)}
  .schedule td:nth-child(3)::before{content:"Time: ";font-weight:900;color:var(--navy)}
  .schedule td:nth-child(4)::before{content:"Room: ";font-weight:900;color:var(--navy)}
}

@media(max-width:430px){
  .readerBtn{flex:1 1 52px}
  .readerBtn.fit{flex:2 1 100px}
  .lessonNav .btn{flex:1 1 120px}
  .step{gap:8px}
  .stepNo{flex-basis:29px;width:29px;height:29px}
}

/* v1.3 deeper-content worked examples */
.exampleGrid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,235px),1fr));
  gap:10px;margin-top:11px;min-width:0;
}
.exampleCard{
  min-width:0;max-width:100%;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:12px;box-shadow:0 4px 14px rgba(16,56,83,.04);
}
.exampleLabel{
  display:inline-block;font-size:calc(12px * min(var(--reader-scale),1.18));
  font-weight:950;color:#fff;background:var(--blue);border-radius:999px;
  padding:5px 8px;margin-bottom:7px;
}
.exampleEn{
  font-size:calc(16px * var(--reader-scale));line-height:1.55;font-weight:800;
  overflow-wrap:anywhere;
}
.exampleSentence{
  margin-top:7px;padding:8px 9px;border-radius:9px;background:#eef5f8;
  font-size:calc(14px * var(--reader-scale));line-height:1.5;overflow-wrap:anywhere;
}