@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Thai:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#243d32;--green:#234c3c;--muted:#7a817a;--line:#e5e8e0;--paper:#fffefa;--bg:#f6f7f2;--orange:#d7a67a;--soft:#edf2ea;font-family:'Manrope','IBM Plex Sans Thai',sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.45}a{color:inherit}button{border:0}button,select,input,a{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #cb884c;outline-offset:4px}button:hover:not(:disabled){filter:brightness(.97)}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.skip{position:absolute;top:-100px}.skip:focus{top:10px;z-index:20;background:white;padding:16px}.site-header{height:100px;max-width:1376px;margin:auto;padding:0 56px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:28px;font-weight:800;letter-spacing:-1.3px;line-height:1}.brand-dot{color:#ba7b4c}.brand small{display:block;font-size:9px;letter-spacing:1.5px;font-weight:600;margin-top:8px;color:var(--muted)}.header-actions{display:flex;gap:20px;align-items:center}.source-pill{font-size:11px;background:#e9f0e7;border:1px solid #dce7d8;padding:8px 12px;border-radius:30px;display:flex;gap:8px;align-items:center}.source-pill i,.section-dot,.green-dot,.orange-dot{width:6px;height:6px;background:#5c8062;border-radius:50%;display:inline-block}.source-pill.offline{background:#fbefdf;color:#8b6038}.source-pill.offline i{background:#b88655}.icon-button{background:transparent;border:1px solid var(--line);border-radius:11px;width:38px;height:38px;display:inline-flex;justify-content:center;align-items:center;text-decoration:none}main{max-width:1264px;margin:auto;padding:42px 0 0}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:36px}.eyebrow{font-size:9px;letter-spacing:1.9px;font-weight:800;display:flex;align-items:center;gap:7px;color:#788b79}.eyebrow>span{width:18px;height:2px;background:#a1b398}h1{font-family:'IBM Plex Sans Thai',sans-serif;font-size:36px;font-weight:600;letter-spacing:-1px;margin:12px 0 4px}h1 span{color:#8c9d7a}p{line-height:1.7}.intro p{margin:4px 0;color:var(--muted);font-size:13px}.deck-info{display:flex;gap:14px;align-items:center;padding:17px 24px;background:#fffefa;border:1px solid var(--line);border-radius:16px;max-width:340px}.deck-info strong{display:block;font-size:13px;overflow-wrap:anywhere}.deck-info span:not(.book-icon){display:block;font-size:11px;color:var(--muted);margin-top:4px}.book-icon{color:#849375;display:flex}.book-icon svg{width:26px;height:26px}.mode-tabs{display:flex;gap:5px;padding:5px;background:#eaede5;border:1px solid #e4e7dc;border-radius:14px;width:fit-content;margin-bottom:25px}.mode-tabs button{display:flex;align-items:center;gap:8px;background:none;padding:12px 24px;border-radius:10px;font-size:13px;font-weight:600;color:#7a8276}.mode-tabs button small{font-size:10px;font-weight:500;opacity:.8}.mode-tabs button[aria-pressed=true]{color:var(--green);background:var(--paper);box-shadow:0 2px 5px #263e3210}.mode-tabs svg{width:18px;height:18px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:25px}.study-panel{min-width:0}.panel-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 17px}.panel-toolbar>div{display:flex;align-items:center;gap:9px}.panel-toolbar strong{font-size:13px;font-weight:600}.count-badge{font-size:10px;border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:#8a9286}.quiet-button{background:transparent;display:flex;align-items:center;gap:6px;font-size:11px;padding:7px}.quiet-button svg{width:15px;height:15px}.tool-actions{gap:8px!important}.tool-actions .icon-button{width:30px;height:30px;border:0}.flash-wrap{perspective:1200px}.flashcard{border:1px solid #e5e4d7;border-radius:24px;width:100%;min-height:355px;background:var(--card-bg,#f1eedf);position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:60px 55px 50px;overflow:hidden;text-align:center;transition:background .2s,transform .2s;box-shadow:0 5px 0 #e7e8df,0 14px 25px #344e3206;cursor:pointer}.flashcard::before,.flashcard::after{content:'';position:absolute;width:220px;height:220px;border:1px solid currentColor;opacity:.045;border-radius:50%;pointer-events:none}.flashcard::before{left:-100px;top:-100px}.flashcard::after{right:-95px;bottom:-110px}.flashcard.flipped{background:#e8efdf}.card-tag{position:absolute;left:24px;top:23px;border:1px solid #ffffff99;background:#ffffff60;border-radius:7px;padding:4px 10px;font-size:9px;font-weight:700;letter-spacing:1px;color:#70806a}.card-number{position:absolute;top:27px;right:26px;color:#89927e;font-size:11px}.card-content{font-size:clamp(24px,2.5vw,35px);line-height:1.45;font-weight:600;letter-spacing:-.6px;max-width:640px;overflow-wrap:anywhere;z-index:1;white-space:pre-line}.card-content img{max-width:100%;max-height:230px;object-fit:contain;border-radius:10px}.card-content a{font-size:18px;word-break:break-word}.card-content .media-link{display:flex;align-items:center;gap:10px;flex-direction:column}.card-content .media-link svg{width:40px;height:40px}.flip-hint{position:absolute;bottom:20px;display:flex;align-items:center;gap:7px;font-size:10px;color:#7c886f}.flip-hint svg{width:13px;height:13px}.card-buttons{position:absolute;right:20px;bottom:14px;display:flex;gap:6px}.card-buttons button{width:34px;height:34px;background:#ffffff60;border:1px solid #ffffff80;border-radius:50%;display:flex;align-items:center;justify-content:center}.card-buttons svg{width:16px;height:16px}.card-nav{display:flex;align-items:center;justify-content:center;gap:24px;margin:25px 0 20px}.card-nav button{border:1px solid var(--line);border-radius:50%;width:38px;height:38px;background:var(--paper);display:flex;justify-content:center;align-items:center}.card-nav>span{font-size:12px;color:#858b80;min-width:60px;text-align:center}.card-nav strong{font-size:16px;color:var(--ink)}.track{height:3px;background:#e6e9df;border-radius:10px;max-width:290px;margin:-8px auto 22px}.track i{display:block;height:100%;border-radius:10px;background:#91a781;transition:width .2s}.assessment{display:flex;justify-content:center;gap:12px}.assessment button{min-width:150px;display:flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;font-size:12px;padding:13px 20px}.review-button{background:#f0e9df;border:1px solid #e7ded1;color:#8e6b4a}.known-button{background:var(--green);color:#fff}.under-card{text-align:center;color:#9ba295;font-size:10px;margin-top:17px}.sidebar{display:flex;flex-direction:column;gap:16px}.progress-panel,.filter-panel{border:1px solid var(--line);background:var(--paper);border-radius:17px;padding:23px}.progress-panel h2{font-size:16px;margin:10px 0 18px;font-weight:600}.progress-layout{display:flex;gap:18px;align-items:center}.progress-ring{width:82px;height:82px;flex-shrink:0;display:grid;place-items:center;border-radius:50%;background:conic-gradient(#6f8962 var(--progress,0%),#edf0e7 0)}.progress-ring>span{display:flex;width:68px;height:68px;border-radius:50%;background:var(--paper);flex-direction:column;justify-content:center;align-items:center}.progress-ring strong{font-size:19px}.progress-ring small{font-size:8px;color:#8a9382}.progress-stats{flex:1}.progress-stats p{display:flex;align-items:center;gap:7px;font-size:10px;margin:9px 0}.progress-stats strong{margin-left:auto;font-size:13px}.orange-dot{background:#c9aa87}.small{font-size:9px;line-height:1.6}.muted{color:var(--muted)}.progress-panel>.small{margin:16px 0 15px}.wide-button{background:#eef2e8;width:100%;padding:11px 6px;border:1px solid #e1e8d8;border-radius:9px;font-size:11px;display:flex;align-items:center;justify-content:center;gap:6px}.wide-button[aria-pressed=true]{background:var(--green);color:white}.wide-button svg{width:14px;height:14px}.filter-panel label{display:block;font-size:11px;font-weight:600;margin-bottom:10px}select{width:100%;border:1px solid #e0e5d9;padding:10px;background:var(--paper);border-radius:8px;color:var(--ink);font-size:11px}.text-button{padding:5px 0;display:flex;align-items:center;gap:6px;background:none;font-size:10px;color:#7e8d71}.text-button svg{width:13px;height:13px}.filter-panel .text-button{margin-top:13px}.filter-panel>.small{display:block;margin-top:3px}.tip-panel{padding:6px 23px}.tip-spark{display:block;color:#bf9873}.tip-panel h3{font-size:12px;font-weight:600;margin:8px 0}.tip-panel p{font-size:11px;margin:0;color:#8b9284}.keyboard-hint{border-top:1px dashed #dce2d3;padding-top:15px;margin-top:16px;font-size:9px;color:#8a9281;display:flex;gap:5px;align-items:center}kbd{font:9px 'Manrope',sans-serif;background:#eef0e8;border:1px solid #dde2d4;border-bottom-width:2px;border-radius:4px;padding:2px 5px}.reset-link{margin:auto auto 0;color:#8b9387;font-size:9px}footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);margin-top:38px;padding:23px 0;font-size:9px;color:#939b8c}footer strong{font-size:13px;color:#6d8266;margin-right:10px}.footer-dot{margin:0 10px}.notice{padding:14px 18px;border:1px solid #e6d7bc;background:#fff6e7;color:#815f39;border-radius:10px;font-size:12px;margin-bottom:20px}.notice[hidden]{display:none}.loading,.empty{min-height:355px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:18px;background:var(--paper);border:1px solid var(--line);border-radius:20px;text-align:center;padding:24px;font-size:14px}.spinner{width:28px;height:28px;border:2px solid #d9e1d4;border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.primary-button,.secondary-button{padding:12px 20px;border-radius:10px;background:var(--green);color:#fff;font-size:12px}.secondary-button{background:#e9eee3;color:var(--green)}.search-row{display:flex;gap:10px;margin-bottom:15px}.search-row input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:12px 15px;background:var(--paper)}.word-list{display:grid;gap:9px;max-height:500px;overflow:auto}.word-row{display:grid;grid-template-columns:28px 1fr 1fr;gap:16px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:12px;font-size:13px;align-items:center;overflow-wrap:anywhere}.word-row .row-number{font-size:10px;color:#99a08f}.word-row img{max-width:120px;max-height:80px;object-fit:contain}.word-row a{word-break:break-all}.word-row>div:last-child{font-weight:600;border-left:1px solid var(--line);padding-left:16px}.match-info{display:flex;align-items:center;justify-content:space-between;margin:8px 0 20px;font-size:12px}.match-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.match-tile{min-height:110px;background:var(--paper);border:1px solid #dce4d2;border-radius:15px;padding:16px;font-size:12px;overflow-wrap:anywhere;display:flex;align-items:center;justify-content:center}.match-tile img{max-width:100%;max-height:80px}.match-tile.selected{outline:2px solid #9aaf7f;background:#edf3e5}.match-tile.matched{background:#e3eddd;opacity:.35}.match-tile.wrong{background:#f9e3d8;outline:2px solid #d59b81}.practice-card{background:var(--paper);border:1px solid var(--line);padding:28px;border-radius:20px}.practice-card .question{font-size:23px;margin:26px 0;min-height:80px;line-height:1.5;overflow-wrap:anywhere}.question img{max-height:180px;max-width:100%}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice{background:#f4f5ed;border:1px solid #e3e7d8;padding:16px;text-align:left;border-radius:11px;font-size:13px;overflow-wrap:anywhere}.choice img{max-height:90px;max-width:100%}.choice.correct{background:#dfeeda;border-color:#80a86c;opacity:1}.choice.incorrect{background:#f6e3d9;border-color:#d4a38b;opacity:1}.feedback{margin-top:20px;font-size:13px;line-height:1.8;overflow-wrap:anywhere}.feedback img{max-height:100px;max-width:100%}.feedback button{margin-top:10px}.practice-top{display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.practice-toggle{display:flex;gap:6px;margin-bottom:12px}.practice-toggle button{padding:8px 12px;font-size:10px;border-radius:7px;background:#e9ede2}.practice-toggle button[aria-pressed=true]{background:var(--green);color:#fff}.answer-form{display:flex;gap:10px}.answer-form input{width:100%;min-width:0;padding:14px;border-radius:10px;border:1px solid var(--line)}.result{padding:40px 24px;text-align:center;background:var(--paper);border:1px solid var(--line);border-radius:20px}.result .score{font-size:56px;font-weight:800}.result h2{font-size:22px}.result p{font-size:13px;color:var(--muted)}.result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}dialog{border:1px solid var(--line);border-radius:20px;padding:28px;max-width:90vw;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#18332555}dialog h2{font-size:22px}dialog p{font-size:13px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}#toast{position:fixed;left:50%;bottom:25px;transform:translateX(-50%);background:var(--green);color:white;padding:12px 22px;border-radius:12px;font-size:12px;z-index:50;max-width:90vw}.study-panel:fullscreen{background:var(--bg);padding:40px;overflow:auto}.study-panel:fullscreen .flashcard{min-height:65vh}.admin-main{max-width:850px;padding-bottom:40px}.admin-panel{padding:32px;border:1px solid var(--line);background:var(--paper);border-radius:20px;margin-bottom:20px}.admin-panel h2{font-size:20px;margin-top:0}.form-field{margin:18px 0}.form-field label{display:block;font-weight:600;font-size:12px;margin-bottom:8px}.form-field input{width:100%;padding:12px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:13px;color:var(--ink)}.form-field small{display:block;color:var(--muted);font-size:11px;margin-top:7px;line-height:1.7}.form-row{display:grid;grid-template-columns:1fr 120px;gap:18px}.admin-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.admin-help{font-size:12px;color:var(--muted);line-height:1.9}.admin-help li{margin-bottom:8px}.admin-help code{font-size:12px;color:var(--ink)}.admin-status{font-size:12px;line-height:1.8;white-space:pre-line;margin-top:18px;color:var(--green)}.admin-status.error{color:#b05d3a}.admin-login{max-width:450px;margin:45px auto}.admin-heading{display:flex;justify-content:space-between;align-items:center}.password-input{letter-spacing:1px}@media(min-width:1600px){main{padding-top:50px}.flashcard{min-height:410px}}@media(max-width:1375px){.site-header{margin:0 34px;padding:0 10px}main{margin:0 44px}}@media(max-width:1050px){.workspace{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.mode-tabs button{padding:12px 20px}.progress-panel,.filter-panel{padding:19px}.progress-layout{gap:10px}.flashcard{padding:60px 28px 50px}h1{font-size:30px}.deck-info{padding:15px;max-width:250px}}@media(max-width:800px){.site-header{height:82px;margin:0 20px;padding:0}.brand{font-size:25px}main{margin:0 20px;padding-top:28px}.intro{align-items:flex-start;gap:16px;margin-bottom:24px}.intro h1{font-size:28px}.intro p{font-size:12px}.deck-info{display:none}.workspace{grid-template-columns:1fr}.sidebar{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.tip-panel{display:none}.reset-link{grid-column:1/-1}.mode-tabs{width:100%;justify-content:space-between}.mode-tabs button{flex:1;justify-content:center;padding:12px 8px}.mode-tabs small{display:none}.flashcard{min-height:340px}.progress-panel h2{margin:7px 0 12px}.progress-panel .eyebrow{font-size:8px}.progress-layout{gap:14px}.progress-stats p{font-size:9px}.filter-panel{display:flex;flex-direction:column;justify-content:center}.filter-panel .text-button{margin-top:20px}footer{gap:12px;flex-direction:column;align-items:flex-start;margin-top:28px}.admin-main{max-width:none}.admin-panel{padding:24px}}@media(max-width:480px){.brand small{font-size:7px}.brand{gap:8px}.brand img{width:34px;height:34px}.source-pill{font-size:8px;padding:6px 8px}.header-actions{gap:8px}.header-actions>.icon-button{width:32px;height:32px}.intro h1{font-size:26px;line-height:1.4}.intro h1 span{display:block}.eyebrow{font-size:8px}.mode-tabs button{font-size:11px;gap:5px;padding:11px 5px}.mode-tabs svg{width:15px;height:15px}.panel-toolbar strong{font-size:11px}.quiet-button{font-size:10px;padding:5px}.tool-actions{gap:2px!important}.flashcard{min-height:330px;border-radius:19px;padding:60px 24px 54px}.card-content{font-size:26px}.card-tag{left:18px;top:19px}.card-number{right:20px;top:22px}.card-buttons{right:12px;bottom:12px}.flip-hint{bottom:25px;font-size:9px;left:22px}.assessment button{min-width:0;flex:1;font-size:11px}.sidebar{grid-template-columns:1fr}.progress-layout{gap:24px}.progress-stats p{font-size:11px}.progress-panel>.small{font-size:9px}.filter-panel{padding:20px}.filter-panel .text-button{margin-top:12px}.match-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.match-tile{font-size:11px;min-height:105px}.practice-card{padding:22px}.practice-card .question{font-size:21px}.choice-grid{grid-template-columns:1fr}.word-row{gap:8px;padding:14px;font-size:11px;grid-template-columns:18px 1fr 1fr}.word-row img{max-width:80px}.search-row input{font-size:12px}.search-row button{font-size:10px;padding:10px}.form-row{grid-template-columns:1fr}.admin-panel{padding:20px}.admin-actions>*{width:100%;text-align:center}.answer-form{flex-direction:column}.notice{font-size:11px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}@media print{header,.intro,.mode-tabs,.sidebar,.panel-toolbar,footer,.search-row,.notice{display:none!important}main{margin:0;padding:0}.workspace{display:block}.word-list{display:block;max-height:none;overflow:visible}.word-row{break-inside:avoid;margin:8px 0}.word-row a{color:black}}
