:root{--green:#34E834;--green-ink:#0d9a0d;--ink:#0F1720;--ink2:#5B6B7B;--line:#E3E9DF;--bg:#F7FAF5;--red:#D93838;--orange:#E89A34;--orange-ink:#9a6b0d}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Noto Sans Thai',-apple-system,sans-serif;background:var(--bg);color:var(--ink)}nav{padding:14px 24px;display:flex;align-items:center;gap:10px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}nav img{width:30px;height:30px}nav b{font-size:18px;letter-spacing:1px}nav b span{color:var(--green)}.nav-links{margin-left:auto;display:flex;align-items:center;gap:18px}.nav-links a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:600}.nav-links a:hover{color:var(--green-ink)}.nav-links .cta{background:var(--green);color:#06130a;padding:8px 16px;border-radius:10px;font-weight:700}@media(max-width:640px){.nav-links{gap:12px}.nav-links a{font-size:13px}.nav-links .home-link{display:none}}.wrap{max-width:760px;margin:0 auto;padding:28px 16px 60px}h1{font-size:clamp(22px,4vw,30px);font-weight:800;line-height:1.35}.sub{color:var(--ink2);font-size:14px;margin-top:8px;line-height:1.7}.badge{display:inline-block;background:var(--green);color:#06130a;font-size:11px;font-weight:800;padding:2px 8px;border-radius:99px;margin-bottom:8px}.hide{display:none!important}.chapters{display:grid;gap:10px;margin:22px 0}.ch-card{background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;text-align:left;font:inherit;transition:.15s;display:flex;align-items:center;gap:14px}.ch-card:hover{border-color:var(--green);transform:translateY(-2px)}.ch-card .ch-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.ch-card .ch-body{flex:1;min-width:0}.ch-card .ch-title{font-size:15px;font-weight:700;margin-bottom:2px}.ch-card .ch-sub{font-size:12.5px;color:var(--ink2);line-height:1.6}.ch-card .ch-status{font-size:11px;font-weight:700;padding:2px 8px;border-radius:99px;flex-shrink:0}.ch-done{background:var(--green);color:#06130a}.ch-todo{background:var(--line);color:var(--ink2)}.ch-locked{background:#fff;color:var(--ink2);border:1px solid var(--line)}.phrase-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-top:18px}.phrase-zh{font-size:28px;font-weight:800;text-align:center;margin:12px 0 4px;font-family:'Noto Sans SC',sans-serif}.phrase-py{font-size:15px;color:var(--ink2);text-align:center;margin-bottom:4px;font-style:italic}.phrase-th{font-size:14px;color:var(--ink);text-align:center;margin-bottom:14px}.phrase-actions{display:flex;gap:8px;justify-content:center;margin-bottom:16px}.phrase-actions button{font:inherit;font-size:13px;font-weight:700;padding:8px 16px;border-radius:10px;cursor:pointer;border:1.5px solid var(--line);background:var(--bg)}.phrase-actions button:hover{border-color:var(--green)}.phrase-actions .speak-btn{background:var(--green);color:#06130a;border-color:var(--green)}.qcard{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-top:18px}.qmeta{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink2);margin-bottom:10px}.qtext{font-size:16.5px;font-weight:700;line-height:1.6;margin-bottom:14px}.opt{display:block;width:100%;text-align:left;font:inherit;font-size:14.5px;background:var(--bg);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;margin-top:8px;cursor:pointer;line-height:1.55;transition:.12s}.opt:hover{border-color:var(--green)}.opt.correct{background:#e9fbe9;border-color:var(--green-ink);font-weight:700}.opt.wrong{background:#fdecec;border-color:var(--red)}.opt:disabled{cursor:default;opacity:.92}.explain{margin-top:12px;font-size:13.5px;color:var(--ink2);background:var(--bg);border-radius:10px;padding:10px 12px;line-height:1.7;display:none}.nextbtn{margin-top:14px;width:100%;padding:13px;border:0;border-radius:12px;background:var(--green);color:#06130a;font:inherit;font-size:15px;font-weight:800;cursor:pointer;display:block}.bar{height:6px;background:var(--line);border-radius:99px;overflow:hidden;margin-top:16px}.bar i{display:block;height:100%;background:var(--green);transition:width .3s}.result{text-align:center;padding:30px 18px}.score{font-size:44px;font-weight:800}.pass{color:var(--green-ink)}.fail{color:var(--red)}.rsub{color:var(--ink2);font-size:14px;margin-top:6px;line-height:1.7}.rbtns{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}.rbtns a,.rbtns button{font:inherit;font-size:14px;font-weight:700;padding:12px 20px;border-radius:12px;cursor:pointer;text-decoration:none}.rbtns .primary{background:var(--green);color:#06130a;border:0}.rbtns .ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}.review-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:10px;text-align:left}.review-card .rv-zh{font-size:18px;font-weight:700;font-family:'Noto Sans SC',sans-serif}.review-card .rv-py{font-size:12px;color:var(--ink2);font-style:italic}.review-card .rv-th{font-size:13px;color:var(--ink);margin-top:2px}.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}.match-item{background:var(--bg);border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;cursor:pointer;text-align:center;font:inherit;font-size:14px;transition:.12s;min-height:44px;display:flex;align-items:center;justify-content:center}.match-item:hover{border-color:var(--green)}.match-item.selected{border-color:var(--green);background:#e9fbe9;font-weight:700}.match-item.matched{background:#e9fbe9;border-color:var(--green-ink);opacity:.7;pointer-events:none}.match-item.wrong-match{background:#fdecec;border-color:var(--red);animation:shake .3s}@keyframes shake{0%,100%{transform:translateX(0)}50%{transform:translateX(-4px)}}.match-label{font-size:12px;color:var(--ink2);margin-bottom:6px;font-weight:700}footer{text-align:center;font-size:12px;color:var(--ink2);padding:20px;border-top:1px solid var(--line);margin-top:20px}footer a{color:var(--green-ink)}