:root{--cream:#fffaf3;--ink:#513f32;--peach:#ee9476;--sage:#7c9167;--mint:#dff3df;--pink:#f9dfe5;--blue:#dceef7;--yellow:#fff0b8;--white:#fff;--shadow:0 14px 38px rgba(100,74,49,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#fffaf3,#fffdf9);color:var(--ink);font-family:Arial,"Noto Sans Thai",sans-serif;line-height:1.55}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:18px;top:12px;z-index:20;background:white;padding:12px;border-radius:10px}.site-header{max-width:1160px;margin:auto;padding:20px 28px;display:flex;align-items:center;justify-content:space-between}.brand{text-decoration:none;color:var(--peach);font-weight:900;font-size:1.55rem;letter-spacing:-.06em}.brand span{color:var(--sage)}nav{display:flex;gap:20px}nav a{color:inherit;text-decoration:none;font-weight:750}.hero{max-width:1000px;margin:10px auto 34px;padding:54px 32px;text-align:center;border-radius:38px;background:linear-gradient(135deg,var(--blue),#f1e9fa 55%,var(--pink));box-shadow:var(--shadow)}.eyebrow,.kicker{font-size:.82rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase;color:#73815e}.hero h1{font-size:clamp(2.45rem,7vw,5.4rem);line-height:1.02;letter-spacing:-.06em;margin:10px 0}.hero h1 span{color:#cf5f72}.hero>p:last-of-type{font-size:1.15rem}.progress{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:26px}.progress span{background:rgba(255,255,255,.75);padding:9px 15px;border-radius:999px;font-weight:800}main{padding:0 24px 80px}.lesson-card{position:relative;max-width:1000px;margin:26px auto;padding:clamp(25px,5vw,52px);border-radius:36px;box-shadow:var(--shadow);overflow:hidden}.watch{background:#fff}.listen{background:var(--blue)}.build{background:var(--yellow)}.quiz{background:var(--pink)}.section-heading{display:flex;gap:18px;align-items:flex-start;margin-bottom:28px}.section-heading .step{display:grid;place-items:center;flex:0 0 52px;width:52px;height:52px;border-radius:50%;background:var(--ink);color:white;font-size:1.5rem;font-weight:900}.section-heading p{margin:3px 0}.section-heading h2{margin:2px 0;font-size:clamp(1.8rem,4vw,3rem);line-height:1.08}.thai-note{font-size:.95rem;color:#6d5c50}.video-wrap{aspect-ratio:16/9;border-radius:24px;overflow:hidden;background:#201d1b;box-shadow:0 10px 25px #392f282b}.video-wrap video{width:100%;height:100%;display:block;object-fit:contain}.video-actions,.result-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:18px 0}.video-actions button,.result-actions button,.result-actions a,.next-button{min-height:48px;padding:12px 18px;border:0;border-radius:999px;background:white;color:var(--ink);font:inherit;font-weight:800;text-decoration:none;box-shadow:0 5px 14px #5d48351c;cursor:pointer}.word-ribbon{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:26px}.word-ribbon span{min-width:62px;padding:10px 16px;text-align:center;background:var(--mint);border-radius:15px;font-size:1.3rem;font-weight:900}.score-chip{position:absolute;right:30px;top:30px;padding:9px 16px;border-radius:999px;background:rgba(255,255,255,.78);font-weight:800}.question-count{font-weight:800;color:#756453}.speaker{display:flex;align-items:center;gap:9px;margin:16px auto;min-width:170px;min-height:62px;justify-content:center;border:3px solid white;border-radius:22px;background:#85bdda;color:#263d48;font:inherit;font-size:1.2rem;font-weight:900;cursor:pointer}.speaker[disabled]{opacity:.65;cursor:not-allowed}.audio-status{text-align:center;min-height:25px;font-weight:700}.choices,.letter-bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px auto;max-width:720px}.choice,.letter-choice{min-height:74px;border:3px solid rgba(81,63,50,.13);border-radius:20px;background:white;color:var(--ink);font:inherit;font-size:clamp(1.25rem,3vw,1.7rem);font-weight:900;cursor:pointer;transition:transform .18s,background .18s}.choice:hover,.letter-choice:hover{transform:translateY(-2px)}.choice:focus-visible,.letter-choice:focus-visible,button:focus-visible,a:focus-visible{outline:4px solid #416a80;outline-offset:3px}.choice.correct,.letter-choice.correct{background:#ccebc9;border-color:#6ca66b}.choice.soft-wrong,.letter-choice.soft-wrong{background:#fff4d6;border-color:#d9b65e}.feedback{text-align:center;min-height:30px;font-size:1.12rem;font-weight:850}.next-button{display:block;margin:12px auto;background:var(--ink);color:white}.next-button[hidden]{display:none}.build-prompt{text-align:center;font-size:1.2rem}.blend-stage{display:flex;align-items:center;justify-content:center;gap:13px;min-height:130px;font-size:clamp(2.5rem,8vw,5rem);font-weight:900}.blend-stage span:not(.equals),.blend-stage strong{display:inline-grid;place-items:center;min-width:95px;padding:8px 16px;border-radius:22px;background:white}.blend-stage.join #moving-letter{animation:joinLetter .55s ease both}.blend-stage.join #built-word{animation:popWord .55s .35s ease both}@keyframes joinLetter{50%{transform:translateX(28px) scale(1.08)}}@keyframes popWord{50%{transform:scale(1.18);color:#4c8a58}}.stars{font-size:2.8rem;color:#e4aa25;letter-spacing:.12em}.results{text-align:center;padding:25px 0}.results .celebration{font-size:5rem;color:#e4aa25;animation:popWord 1s ease}.results>strong{display:block;font-size:clamp(3rem,9vw,6rem);line-height:1}.results h3{font-size:2rem;margin:10px}.result-actions button:disabled{opacity:.55;cursor:not-allowed}footer{display:flex;flex-direction:column;align-items:center;padding:30px;background:var(--ink);color:white;font-size:.9rem}
@media(max-width:680px){.site-header{padding:16px 18px}.site-header nav a:first-child{display:none}main{padding:0 14px 55px}.hero{padding:38px 20px;border-radius:0;margin:0 -14px 24px}.lesson-card{padding:25px 18px;border-radius:26px}.section-heading{gap:12px;padding-top:28px}.section-heading .step{flex-basis:42px;width:42px;height:42px}.score-chip{top:16px;right:18px}.choices,.letter-bank{grid-template-columns:1fr}.choice,.letter-choice{min-height:64px}.video-actions button{flex:1 1 42%}.blend-stage{gap:7px}.blend-stage span:not(.equals),.blend-stage strong{min-width:62px;padding:6px 9px}.result-actions{flex-direction:column}.result-actions>*{width:100%;display:grid;place-items:center}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.blend-stage.join #moving-letter,.blend-stage.join #built-word,.results .celebration{animation:none}.choice,.letter-choice{transition:none}}
.hero h1{font-size:clamp(2.45rem,6.2vw,4.85rem)}.hero h1 span{white-space:nowrap}
.listen .speaker{margin-bottom:4px}
.listen .audio-status{min-height:1.4em;margin:2px 0}
.listen .choices{margin-top:10px}
.pictured-choice{display:flex;align-items:center;justify-content:flex-start;gap:12px;padding:8px 18px;text-align:left}
.vocab-icon{display:block;flex:0 0 72px;width:72px;height:72px;border-radius:16px;background-image:url("../../assets/phonics/at-word-sprite-original.png");background-repeat:no-repeat;background-size:400% 200%}
@media(max-width:680px){.pictured-choice{min-height:82px}.vocab-icon{flex-basis:64px;width:64px;height:64px}}