:root{--bg:#f1f4f8;--ink:#16223a;--navy:#16223a;--teal:#0e7c86;--teal-l:#e3f1f2;--muted:#6b7890;--line:#dbe1ea;--card:#fff;--ok:#0f9d6b;--warn:#d6911f;--bad:#c24230;font-family:'IBM Plex Sans Thai','IBM Plex Sans','Segoe UI',Arial,sans-serif}
*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--ink);font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}h1,h2,h3,h4{font-weight:500;line-height:1.4;margin:0}p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}
a{color:var(--teal)}
.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar-in{max-width:1240px;margin:auto;padding:8px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;background:none;border:0;padding:0}.brand img{height:34px}.brand span{font-size:10px;line-height:1.3;letter-spacing:.08em;color:var(--muted);text-align:left}
.topnav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}.topnav button{background:none;border:1px solid transparent;border-radius:6px;padding:6px 12px;font-size:14px;font-weight:500;color:#3a4a66}.topnav button.current{background:var(--navy);color:#fff}
.chip{width:30px;height:30px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:500;font-size:13px}
.save-state{font-size:12px;color:var(--muted);white-space:nowrap}
.view{display:none}.view.active{display:block}
.wrap{max-width:1240px;margin:auto;padding:20px 16px 48px}
.kicker{font-size:11px;letter-spacing:.09em;font-weight:600;color:var(--teal);text-transform:uppercase}
.page-title{font-size:26px;margin:4px 0 6px}.lead{color:var(--muted);font-size:15px;max-width:820px}
.grid{display:grid;gap:14px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.course-card h2{font-size:18px;margin:6px 0 4px}.course-card .code{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted)}.course-card p{font-size:13.5px;color:#3a4a66}.course-card .foot{margin-top:14px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.tag{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--teal-l);color:var(--teal);font-weight:500}.tag.gray{background:#eef1f5;color:var(--muted)}
.btn{border:1px solid var(--navy);background:var(--navy);color:#fff;border-radius:6px;padding:7px 14px;font-size:13.5px;font-weight:500}.btn.outline{background:#fff;color:var(--navy)}.btn.teal{background:var(--teal);border-color:var(--teal)}.btn.sm{padding:4px 10px;font-size:12.5px}.btn:disabled{opacity:.5;cursor:default}
.auth{max-width:460px;margin:40px auto}.auth-tabs{display:flex;gap:4px;margin-bottom:14px}.auth-tabs button{flex:1;border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px}.auth-tabs button.active{background:var(--navy);color:#fff;border-color:var(--navy)}
label.f{display:block;font-size:13px;font-weight:500;margin:10px 0 4px}
input.i,select.i,textarea.i{width:100%;border:1px solid #c9d2de;border-radius:6px;padding:8px 10px;background:#fff;font-size:14px}textarea.i{min-height:70px;resize:vertical}input.i:focus,select.i:focus,textarea.i:focus{outline:2px solid #9fd5da;border-color:var(--teal)}
input.i.num{text-align:right;font-variant-numeric:tabular-nums}
.err{color:var(--bad);font-size:13px;min-height:18px;margin-top:6px}.hint{font-size:12px;color:var(--muted)}
.course-layout{display:grid;grid-template-columns:260px 1fr;gap:18px;align-items:start}
.steps{position:sticky;top:64px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px}
.steps button{display:flex;gap:10px;align-items:center;width:100%;text-align:left;background:none;border:0;border-radius:6px;padding:8px 10px;font-size:13.5px;color:#3a4a66}.steps button.active{background:var(--teal-l);color:var(--teal);font-weight:500}.steps .n{width:22px;height:22px;border-radius:50%;background:#eef1f5;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;flex-shrink:0}.steps button.active .n{background:var(--teal);color:#fff}.steps .done .n{background:var(--ok);color:#fff}
.steps hr{border:0;border-top:1px solid var(--line);margin:8px 0}
.workspace .card{margin-bottom:14px}
.step-head{margin-bottom:12px}.step-head h1{font-size:22px}.step-head p{color:var(--muted);font-size:14px}
.sec{margin-bottom:10px}.sec h3{font-size:15px;margin-bottom:6px}.sec h3 small{font-weight:400;color:var(--muted);font-size:12px;margin-left:8px}
.example{background:#fbf7ec;border:1px solid #ecdcb0;border-radius:8px;padding:10px 12px;font-size:13px;color:#5a4a1c;margin:6px 0 10px}.example b{color:#7a5b00}
.fields{display:grid;gap:8px 14px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
table.t{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:13px}table.t th,table.t td{padding:6px 8px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}table.t th{font-weight:500;color:#3a4a66;background:#f6f8fb;font-size:12px}table.t td.l,table.t th.l{text-align:left;white-space:normal}table.t tr.tot td{font-weight:600;border-top:2px solid #c9d2de}table.t td.neg{color:var(--bad)}table.t input.i{width:100px;padding:4px 6px}table.t input.i.w{width:100%}table.t select.i{width:auto;padding:4px 6px}table.t input.i.sm{width:64px}
.tablewrap{overflow:auto}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin:8px 0 12px}.kpi{background:#f6f8fb;border-radius:8px;padding:10px 12px}.kpi small{display:block;font-size:11px;color:var(--muted)}.kpi strong{display:block;font-size:20px;font-weight:600;margin-top:2px;font-variant-numeric:tabular-nums}.kpi.accent{background:var(--teal);color:#fff}.kpi.accent small{color:#bfe3e6}.kpi em{font-style:normal;font-size:11px;color:var(--muted)}.kpi.accent em{color:#bfe3e6}
.stepnav{display:flex;justify-content:space-between;gap:10px;margin-top:8px}
.canvas-svg{width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:8px}
.check{display:flex;gap:8px;align-items:flex-start;font-size:13.5px;padding:4px 0}.check input{margin-top:5px}
.pill-list{display:flex;flex-wrap:wrap;gap:6px}.pill-list label{border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:13px;background:#fff;cursor:pointer}.pill-list label.on{background:var(--teal-l);border-color:var(--teal);color:var(--teal)}.pill-list input{display:none}
.plan{max-width:900px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:34px 40px}.plan h1{font-size:24px}.plan h2{font-size:17px;margin:22px 0 6px;padding-top:12px;border-top:1px solid var(--line);color:var(--teal)}.plan .meta{color:var(--muted);font-size:13px;margin-bottom:4px}.plan p,.plan li{font-size:14px}.plan .empty{color:#a3aec0;font-style:italic}.plan table.t{margin:6px 0}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.ov-table td,.ov-table th{white-space:nowrap}.ov-table tr{cursor:pointer}.ov-table tr:hover td{background:#f6f8fb}
.toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:8px 16px;border-radius:8px;font-size:13px;opacity:0;transition:.2s;pointer-events:none}.toast.show{opacity:1}
.readonly .i{background:#f6f8fb;pointer-events:none}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.course-layout{grid-template-columns:1fr}.steps{position:static;display:flex;overflow:auto;gap:4px}.steps button{width:auto;white-space:nowrap}.steps hr{display:none}}
@media(max-width:600px){.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}.plan{padding:20px}}
@media print{body{background:#fff}.topbar,.toolbar,.toast{display:none!important}.plan{border:0;padding:0;max-width:none}.wrap{padding:0}}

.topic{padding:22px 0 18px;border-top:1px solid var(--ink)}.topic:first-child{border-top:2px solid var(--ink);margin-top:14px}
.topic-head{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:start;margin-bottom:12px}.topic-no{font-family:'IBM Plex Mono',monospace;font-size:12px;color:#b8891f;padding-top:6px}
.topic-head h2{font-size:20px;margin:0 0 2px}.topic-for{font-size:12.5px;color:var(--muted);margin:0 0 4px}.topic-p{font-size:14px;color:#3a4a66;max-width:820px}
.editions{margin-left:54px}.topic-empty{margin-left:54px;font-size:13px;color:var(--muted)}
@media(max-width:600px){.editions,.topic-empty{margin-left:0}}

.mats{padding:6px 10px 4px}.mats-h{font-size:11px;letter-spacing:.08em;color:var(--muted);font-weight:600;margin-bottom:4px}
.mat{display:block;font-size:13px;color:var(--teal);text-decoration:none;padding:4px 0}.mat:hover{text-decoration:underline}
.qr-card{text-align:center;padding:26px 22px}.qr-card img{width:min(340px,80%);height:auto;border:1px solid var(--line);border-radius:8px;padding:8px;background:#fff}.qr-card h2{font-size:18px;margin:14px 0 4px}.qr-card .mono{font-family:'IBM Plex Mono',monospace;font-size:11px;word-break:break-all;margin-top:10px}
.qr-card.accent{background:var(--teal-l);border-color:#bfe3e6}.event-code{font-family:'IBM Plex Mono',monospace;font-size:34px;font-weight:600;letter-spacing:.12em;color:var(--teal);margin:2px 0 6px}
@media print{.steps,.topnav{display:none!important}.qr-card img{width:70%}}