@font-face{font-family:Itim;src:url('fonts/itim-thai-400-normal.woff2') format('woff2');font-display:swap}
@font-face{font-family:Mali;src:url('fonts/mali-thai-400-normal.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:Mali;src:url('fonts/mali-thai-600-normal.woff2') format('woff2');font-weight:600;font-display:swap}
:root{--red:#922c32;--red2:#b73a40;--cream:#fff9f0;--gold:#e8ad32;--ink:#4a3531;--muted:#786560;--line:#efd5c7;--white:#fff;--shadow:0 16px 40px rgba(105,55,44,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:Mali,"Noto Sans Thai",sans-serif;font-size:18px;line-height:1.75}button,select{font:inherit}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.nowrap{white-space:nowrap;display:inline-block}
.site-header{position:sticky;top:0;z-index:20;background:linear-gradient(135deg,#7d2027,var(--red2));color:#fff;box-shadow:0 6px 22px rgba(83,28,29,.18)}
.nav-wrap{max-width:1440px;margin:auto;min-height:94px;padding:14px 30px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:14px;margin-right:auto}.brand-icon{width:66px;height:66px;border-radius:22px;background:#fff0bd;display:grid;place-items:center;font-size:34px;border:2px solid rgba(255,255,255,.7)}.brand strong{font:400 29px/1.1 Itim,sans-serif;color:#fff1b8;display:block}.brand small{font-size:15px;color:#fff;opacity:.95}.nav{display:flex;align-items:center;gap:6px}.nav a{padding:10px 13px;border-radius:16px;font:400 18px Itim,sans-serif;white-space:nowrap}.nav a:hover,.nav a.active{background:#fff;color:var(--red)}.menu-btn{display:none;background:#fff;color:var(--red);border:0;border-radius:18px;padding:11px 16px;font:22px Itim,sans-serif}
.shell{max-width:1360px;margin:auto;padding:56px 28px 80px}.hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(360px,.75fr);gap:32px;align-items:stretch}.card{background:#fff;border:2px solid var(--line);border-radius:38px;box-shadow:var(--shadow)}.hero-image{padding:24px;display:flex;align-items:center;background:linear-gradient(145deg,#fff,#fffaf3)}.hero-image img{width:100%;border-radius:24px;cursor:zoom-in}.hero-copy{padding:48px;display:flex;flex-direction:column;justify-content:center}.eyebrow{color:#b57d18;font-weight:600;margin:0 0 8px}.hero-copy h1,.section-head h1{font:400 clamp(46px,5vw,76px)/1.05 Itim,sans-serif;color:var(--red);margin:0 0 18px}.hero-copy p{font-size:21px;color:var(--muted);margin:0 0 26px}.button-row{display:flex;gap:12px;flex-wrap:wrap}.btn{border:0;border-radius:18px;padding:12px 24px;background:var(--red2);color:#fff;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.btn.secondary{background:#fff;color:var(--red);border:2px solid var(--red)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}.feature{padding:26px}.feature .icon{font-size:34px}.feature h3{font:26px Itim,sans-serif;color:var(--red);margin:6px 0}.feature p{margin:0;color:var(--muted)}
.section-head{text-align:center;margin-bottom:28px}.section-head h1{font-size:56px}.section-head p{max-width:820px;margin:0 auto;color:var(--muted);font-size:20px}.deck{padding:28px}.slide-frame{background:#fffaf4;border-radius:24px;overflow:hidden;min-height:300px;display:flex;align-items:center;justify-content:center}.slide-frame img{width:100%;height:auto;cursor:zoom-in}.deck-controls{display:grid;grid-template-columns:auto 1fr auto;gap:14px;margin-top:20px}.deck-controls button,.deck-controls select{border:0;border-radius:16px;padding:11px 18px}.deck-controls button{background:var(--red2);color:#fff;cursor:pointer}.deck-controls button:disabled{opacity:.38;cursor:not-allowed}.deck-controls select{border:2px solid var(--line);background:#fff;color:var(--ink);min-width:0}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}.topic{background:#fff;border:2px solid var(--line);border-radius:26px;padding:24px}.topic h3{font:27px Itim,sans-serif;color:var(--red);margin:0 0 8px}.topic p{margin:0;color:var(--muted)}
.lightbox[hidden]{display:none!important}.lightbox{position:fixed;inset:0;z-index:50;background:rgba(31,18,17,.9);display:grid;place-items:center;padding:24px}.lightbox img{max-width:96vw;max-height:90vh;border-radius:12px}.close-lightbox{position:absolute;right:24px;top:18px;border:0;background:#fff;color:var(--red);width:48px;height:48px;border-radius:50%;font-size:28px;cursor:pointer}
.quiz-card{padding:38px;max-width:1000px;margin:auto}.quiz-top{display:flex;justify-content:space-between;gap:16px;align-items:center}.quiz-top h2{font:38px Itim,sans-serif;color:var(--red);margin:0}.progress{height:12px;background:#f2e4dc;border-radius:99px;margin:18px 0 28px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--red2))}.question{font-size:23px;font-weight:600;margin-bottom:20px}.choices{display:grid;gap:12px}.choice{border:2px solid var(--line);background:#fff;border-radius:20px;padding:15px 18px;text-align:left;color:var(--ink);cursor:pointer;display:flex;gap:13px}.choice:hover{border-color:var(--gold);background:#fffcf5}.choice.correct{border-color:#3a9d68;background:#edf9f1}.choice.wrong{border-color:#d45252;background:#fff0f0}.choice:disabled{cursor:default}.letter{width:34px;height:34px;flex:0 0 34px;border-radius:50%;background:#fff0bd;display:grid;place-items:center;color:var(--red);font-weight:600}.feedback{margin-top:18px;border-radius:18px;padding:16px 20px;background:#f7f0ea}.quiz-actions{display:flex;justify-content:flex-end;margin-top:18px}.result{text-align:center;padding:25px}.result .score{font:64px Itim,sans-serif;color:var(--red)}
.footer{background:#6f1f25;color:#fff;text-align:center;padding:24px}.footer p{margin:0;opacity:.9}
@media(max-width:1100px){.nav-wrap{padding:12px 18px;min-height:82px}.brand-icon{width:56px;height:56px}.brand strong{font-size:24px}.menu-btn{display:block}.nav{display:none;position:absolute;left:14px;right:14px;top:86px;background:#fff;color:var(--red);padding:12px;border-radius:22px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{text-align:center}.hero{grid-template-columns:1fr}.hero-copy{padding:36px}.feature-grid,.topic-grid{grid-template-columns:1fr 1fr}}
@media(max-width:680px){body{font-size:16px}.shell{padding:28px 14px 60px}.brand small{display:none}.brand strong{font-size:21px}.brand-icon{width:50px;height:50px;border-radius:17px;font-size:28px}.hero-image{padding:12px}.hero-copy{padding:28px}.hero-copy h1,.section-head h1{font-size:42px}.hero-copy p,.section-head p{font-size:17px}.feature-grid,.topic-grid{grid-template-columns:1fr}.deck{padding:12px}.deck-controls{grid-template-columns:1fr 1fr}.deck-controls select{grid-column:1/-1;grid-row:1}.quiz-card{padding:20px 15px}.quiz-top{align-items:flex-start}.question{font-size:19px}.choice{padding:12px}.footer{font-size:14px}}