/* X10 AI Training — Classic Blue · หัวแอปบน · หน้าเรียน 3 คอลัมน์ (Section | คลิป+Checkpoint | แชท AI) */
:root{
  --bg:#f3f6fb; --card:#ffffff; --fg:#14213d; --muted:#5b6b86; --line:#dbe3ef;
  --accent:#0f4c81; --on-accent:#ffffff; --accent-soft:#e3edf8; --gold:#c98a12;
  --ok:#1f8a52; --ok-soft:#e2f4ea; --warn:#b45309; --warn-soft:#fdf0dc; --bad:#c0392b; --bad-soft:#fbe6e3;
  --top:#6d28d9; --top-soft:#efe7fd; --screen:#0b1a2e; --hero2:#1d6fb8; --accent-ink:#0f4c81;
  --f-display:"Prompt","IBM Plex Sans Thai",system-ui,sans-serif;
  --f-body:"IBM Plex Sans Thai",system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0c1524; --card:#131f33; --fg:#e7eef9; --muted:#9aabc6; --line:#24344f;
  --accent:#6aa8e6; --on-accent:#0c1524; --accent-soft:#1a2d48; --gold:#f0b94a;
  --ok:#4cc488; --ok-soft:#173528; --warn:#f0a948; --warn-soft:#3a2a12; --bad:#ef7b6e; --bad-soft:#3d1c19;
  --top:#b394f5; --top-soft:#2a2043; --screen:#050c17; --hero2:#163a63; --accent-ink:#0f4c81; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0c1524; --card:#131f33; --fg:#e7eef9; --muted:#9aabc6; --line:#24344f;
  --accent:#6aa8e6; --on-accent:#0c1524; --accent-soft:#1a2d48; --gold:#f0b94a;
  --ok:#4cc488; --ok-soft:#173528; --warn:#f0a948; --warn-soft:#3a2a12; --bad:#ef7b6e; --bad-soft:#3d1c19;
  --top:#b394f5; --top-soft:#2a2043; --screen:#050c17; --hero2:#163a63; --accent-ink:#0f4c81; color-scheme:dark}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:15px;line-height:1.55}
a{color:var(--accent)}
.wrap{max-width:1320px;margin:0 auto;padding-inline:16px;padding-block:20px 48px}
.loading{padding:60px 0;text-align:center;color:var(--muted)}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;line-height:1.25}
h1{font-size:clamp(22px,3vw,30px);margin:4px 0 6px}
h2{font-size:20px;margin:0 0 10px}
.sub{color:var(--muted);margin:0}
.eyebrow{font-size:12px;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.muted{color:var(--muted)}
.num{font-variant-numeric:tabular-nums}

/* top bar */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--f-display);font-weight:600;color:var(--fg);text-decoration:none;font-size:17px}
#nav{display:flex;gap:4px;flex-wrap:wrap;flex:1}
#nav a{padding:6px 12px;border-radius:8px;text-decoration:none;color:var(--muted);font-weight:500}
#nav a.on{background:var(--accent-soft);color:var(--accent)}
.who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.who b{color:var(--fg)}

/* controls */
.btn{font:inherit;font-weight:600;border:1px solid var(--line);background:var(--card);color:var(--fg);padding:7px 14px;border-radius:8px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.btn.danger{color:var(--bad);border-color:var(--bad)}
.btn.sm{padding:4px 10px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn:focus-visible,a:focus-visible,.sec:focus-visible,.chip:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input,textarea,select{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);min-width:0}
textarea{width:100%;resize:vertical}
label.f{display:grid;gap:4px;font-size:13px;font-weight:600;color:var(--muted)}
label.f>input,label.f>textarea,label.f>select{font-weight:400;color:var(--fg)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}

.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;min-width:0}
.ph{padding:12px 14px;border-bottom:1px solid var(--line);font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:8px}
.ph small{font-weight:400;color:var(--muted)}
.pb{padding:14px}
.bar{height:8px;background:var(--line);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--ok);width:0;transition:width .4s}
.pill{display:inline-block;font-size:12px;font-weight:600;padding:2px 9px;border-radius:999px;white-space:nowrap}
.pill.top{background:var(--top-soft);color:var(--top)}
.pill.good,.pill.done{background:var(--ok-soft);color:var(--ok)}
.pill.ok,.pill.doing{background:var(--accent-soft);color:var(--accent)}
.pill.low{background:var(--bad-soft);color:var(--bad)}
.pill.none{background:var(--line);color:var(--muted)}
.pill.draft{background:var(--warn-soft);color:var(--warn)}

/* login */
.login{max-width:420px;margin:8vh auto;text-align:center}
.login .panel{padding:28px;display:grid;gap:14px;text-align:left}
.login .big{justify-content:center;padding:12px;font-size:16px}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}

/* home */
.hero{display:flex;flex-wrap:wrap;gap:16px 32px;align-items:flex-end;justify-content:space-between;padding:22px 24px;border-radius:16px;background:linear-gradient(135deg,var(--accent) 0%,var(--hero2) 100%);color:#fff}
.hero .eyebrow,.hero .sub{color:rgba(255,255,255,.82)}
.hero h1{margin:4px 0 6px}
.hero .sub{max-width:62ch}
.hero-stats{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.hero-stats>div{background:rgba(255,255,255,.14);border-radius:12px;padding:8px 14px;min-width:84px;text-align:center}
.hero-stats b{display:block;font-family:var(--f-display);font-size:24px;line-height:1.2}
.hero-stats small{font-size:12px;opacity:.85}
.hero .btn.primary{background:#fff;color:var(--accent-ink);border-color:#fff}
.chips-bar{display:flex;gap:8px;overflow-x:auto;padding:14px 0 4px;scrollbar-width:thin}
.chips-bar .chip{white-space:nowrap;padding:7px 14px;font-size:14px}
.chips-bar .chip b{font-weight:600;color:var(--muted);margin-left:2px}
.chip.on{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.chip.on b{color:inherit;opacity:.8}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px;margin-top:12px}
.ccard{display:flex;flex-direction:column;overflow:hidden}
.ccard:hover{border-color:var(--accent)}
.cover{position:relative;display:grid;place-items:center;aspect-ratio:16/9;max-width:100%;background:linear-gradient(135deg,var(--accent-soft),var(--bg));text-decoration:none;overflow:hidden}
.cover video{width:100%;height:100%;object-fit:cover;display:block;background:#000}
.cover-ic{font-size:52px}
.cover-n{position:absolute;right:10px;bottom:10px;background:rgba(5,12,23,.7);color:#fff;font-size:12px;padding:3px 9px;border-radius:999px}
.cbody{display:grid;gap:8px;padding:14px 16px 16px}
.ccard h3{margin:0;font-size:18px}
.ccard h3 a{color:inherit;text-decoration:none}
.clamp{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:14px}
.cfoot{display:flex;gap:6px;align-items:center;font-size:13px}
.cadm{border-top:1px dashed var(--line);padding-top:10px}
.ready-warn{font-size:13px;color:var(--warn);background:var(--warn-soft);padding:6px 10px;border-radius:8px}
.pill.dept{background:var(--bg);color:var(--muted);border:1px solid var(--line);font-weight:500}
.sechead{display:flex;align-items:baseline;gap:10px;margin-top:24px}
.sechead h2{margin:0}
.empty-card{padding:28px;text-align:center;margin-top:16px}

/* learn page */
header.course{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:flex-end;justify-content:space-between;margin-bottom:18px}
.overall{min-width:220px;flex:0 1 300px}
.overall small{display:flex;justify-content:space-between;color:var(--muted);margin-bottom:6px;font-variant-numeric:tabular-nums}
.grid3{display:grid;grid-template-columns:260px minmax(0,1fr) 360px;gap:16px;align-items:start}
@media (max-width:1150px){.grid3{grid-template-columns:240px minmax(0,1fr)}.chat{grid-column:1/-1}}
@media (max-width:760px){.grid3{grid-template-columns:minmax(0,1fr)}}
ol.secs{list-style:none;margin:0;padding:6px}
.sec{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;padding:10px;border-radius:9px;cursor:pointer;border:1px solid transparent;width:100%;text-align:left;background:none;color:inherit;font:inherit}
.sec:hover:not([disabled]){background:var(--accent-soft)}
.sec[aria-current="true"]{background:var(--accent-soft);border-color:var(--accent)}
.sec[disabled]{cursor:not-allowed;opacity:.55}
.sec .n{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:13px;background:var(--line);color:var(--muted);font-variant-numeric:tabular-nums}
.sec.done .n{background:var(--ok);color:#fff}
.sec.now .n{background:var(--accent);color:var(--on-accent)}
.sec b{display:block;font-weight:600;font-size:14px;line-height:1.35}
.sec span.s{font-size:12px;color:var(--muted)}
.finish{margin:4px 6px 8px;padding:10px;border:1px dashed var(--line);border-radius:9px;font-size:13px;color:var(--muted)}
.finish.open{border-style:solid;border-color:var(--ok);color:var(--ok);background:var(--ok-soft)}
.screen{position:relative;aspect-ratio:16/9;max-width:100%;background:var(--screen);border-radius:12px 12px 0 0;overflow:hidden;color:#fff;display:grid;place-items:center}
.screen video{width:100%;height:100%;display:block;background:#000}
.screen .empty{text-align:center;padding:20px;opacity:.85}
.ctrl{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 14px}
.ctrl .bar{flex:1 1 160px}
.time{font-variant-numeric:tabular-nums;color:var(--muted);font-size:13px}
.note{font-size:12px;color:var(--muted);padding:0 14px 12px}
.cp{margin-top:16px;padding:16px}
.cp h3{margin:0 0 4px;font-size:18px}
.qb{margin-top:14px;display:grid;gap:8px}
.qb .q{font-weight:600}
.opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:9px;cursor:pointer}
.opt:hover{border-color:var(--accent)}
.opt input{margin-top:4px}
.qb.right .q::after{content:" ✓";color:var(--ok)}
.qb.wrong .q::after{content:" ✗";color:var(--bad)}
.res{margin-top:12px;padding:10px 12px;border-radius:9px;font-size:14px}
.res.ok{background:var(--ok-soft);color:var(--ok)}
.res.bad{background:var(--bad-soft);color:var(--bad)}
.locked{padding:22px;text-align:center;color:var(--muted)}

/* chat */
.chat{display:flex;flex-direction:column;max-height:760px}
.ctx{margin:10px 12px 0;font-size:12px;background:var(--accent-soft);color:var(--accent);padding:6px 10px;border-radius:8px}
.msgs{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;min-height:280px}
.m{max-width:92%;padding:9px 12px;border-radius:12px;font-size:14px;white-space:pre-line;overflow-wrap:anywhere}
.m.me{align-self:flex-end;background:var(--accent);color:var(--on-accent);border-bottom-right-radius:4px}
.m.ai{align-self:flex-start;background:var(--bg);border:1px solid var(--line);border-bottom-left-radius:4px}
.m.wait{color:var(--muted);font-style:italic}
.m .src{display:block;margin-top:6px;font-size:11px;color:var(--muted)}
.acts{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;white-space:normal}
.acts a,.acts button{font:inherit;font-size:12.5px;font-weight:600;padding:5px 10px;border-radius:7px;border:1px solid var(--accent);color:var(--accent);background:var(--card);text-decoration:none;cursor:pointer}
.acts button:disabled{opacity:.55;cursor:not-allowed}
.chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 12px 8px}
.chip{font:inherit;font-size:12.5px;padding:5px 10px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--fg);cursor:pointer}
.chip:hover{border-color:var(--accent)}
form.ask{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line)}
form.ask input{flex:1}

/* dashboard */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:16px 0}
.kpi{padding:14px}
.kpi small{color:var(--muted);font-size:12px}
.kpi b{display:block;font-family:var(--f-display);font-size:26px;font-variant-numeric:tabular-nums}
.levelbar{display:flex;height:12px;border-radius:99px;overflow:hidden;background:var(--line);margin-top:8px}
.levelbar i{display:block;height:100%}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--muted);margin-top:8px}
.legend span::before{content:"";display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:5px;background:var(--c)}
.tw{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;white-space:nowrap}
th{font-size:12px;color:var(--muted);font-weight:600;position:sticky;top:0;background:var(--card);cursor:pointer;user-select:none}
th.r,td.r{text-align:right;font-variant-numeric:tabular-nums}
tr.click{cursor:pointer}
tr.click:hover td{background:var(--accent-soft)}
td .sm{font-size:12px;color:var(--muted)}
.dots{display:flex;gap:3px}
.dots i{width:12px;height:12px;border-radius:3px;background:var(--line)}
.dots i.p1{background:var(--ok)} .dots i.p2{background:var(--warn)} .dots i.p3{background:var(--bad)} .dots i.go{background:var(--accent-soft);outline:1px solid var(--accent)}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:16px}
@media (max-width:900px){.grid2{grid-template-columns:minmax(0,1fr)}}
.ask-row{padding:10px 14px;border-bottom:1px solid var(--line);display:grid;gap:4px}
.ask-row:last-child{border-bottom:0}
.ask-row .q{font-weight:600}
.ask-row .a{font-size:13px;color:var(--muted);white-space:pre-line}
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center}

/* admin */
.adm-sec{border:1px solid var(--line);border-radius:10px;margin-top:12px}
.adm-sec>.ph{background:var(--bg);border-radius:10px 10px 0 0}
.adm-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px;align-items:start}
@media (max-width:900px){.adm-grid{grid-template-columns:minmax(0,1fr)}}
.qed{border:1px solid var(--line);border-radius:9px;padding:10px;display:grid;gap:6px;margin-top:8px}
.qed .o{display:flex;gap:6px;align-items:center}
.qed .o input[type=text]{flex:1}
.orgs{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px 16px;max-height:300px;overflow:auto;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card)}
.orgs label{font-size:13px;display:flex;gap:6px;align-items:center}
.orgs label.dep{font-weight:700}
.vid-mini{width:220px;max-width:100%;border-radius:8px;background:#000;aspect-ratio:16/9}

/* learn: admin upload in player */
.big-up{margin-top:12px;font-size:15px;padding:10px 18px}
.screen .up-st{font-size:13px;color:#fff;opacity:.75;margin-top:8px}
.screen.drop,.srow.drop{outline:3px dashed var(--accent);outline-offset:-6px}
.up-st{font-size:12px;color:var(--accent);font-weight:600}

/* admin course page */
.checklist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) minmax(0,1.6fr);gap:0;margin-top:14px;overflow:hidden}
@media (max-width:760px){.checklist{grid-template-columns:repeat(3,minmax(0,1fr))}.ck-pub{grid-column:1/-1;border-top:1px solid var(--line)}}
.ck{padding:12px 16px;border-right:1px solid var(--line);display:grid;gap:2px}
.ck b{font-family:var(--f-display);font-size:22px}
.ck span{font-size:13px;color:var(--muted)}
.ck.done b{color:var(--ok)} .ck.doing b{color:var(--warn)} .ck.none b{color:var(--bad)}
.ck-pub{display:flex;gap:12px;align-items:center;padding:12px 16px}
.ck-pub small{display:block;font-size:12px}
.switch{position:relative;width:46px;height:26px;flex:none}
.switch input{opacity:0;width:0;height:0;position:absolute}
.switch span{position:absolute;inset:0;background:var(--line);border-radius:99px;cursor:pointer;transition:background .2s}
.switch span::after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.switch input:checked+span{background:var(--ok)}
.switch input:checked+span::after{transform:translateX(20px)}
.switch input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
.srows{margin-top:10px;overflow:hidden}
.srow{border-bottom:1px solid var(--line)}
.srow:last-child{border-bottom:0}
.shead{display:grid;grid-template-columns:28px 128px minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 14px}
@media (max-width:760px){.shead{grid-template-columns:28px 96px minmax(0,1fr)}.sact{grid-column:1/-1;justify-content:flex-end}}
.sn{width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:700;font-size:13px}
.sthumb{position:relative;aspect-ratio:16/9;width:100%;border-radius:8px;overflow:hidden;background:var(--bg);border:1px dashed var(--line);display:grid;place-items:center}
.sthumb video{width:100%;height:100%;object-fit:cover;display:block;background:#000}
.sthumb em{font-style:normal;font-size:12px;color:var(--muted)}
.sthumb span{position:absolute;right:4px;bottom:4px;background:rgba(5,12,23,.75);color:#fff;font-size:11px;padding:1px 6px;border-radius:5px}
.stitle{display:grid;gap:5px;min-width:0}
.stitle b{overflow-wrap:anywhere}
.stitle .row{gap:5px}
.sact{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.btn.icon{padding:4px 9px}
.sbody{display:none;padding:4px 14px 16px 54px;gap:12px;background:var(--bg)}
@media (max-width:760px){.sbody{padding-left:14px}}
.srow.open .sbody{display:grid}
.srow.open .shead{background:var(--accent-soft)}
.settings{margin-top:22px}
.settings summary{padding:14px 16px;cursor:pointer;font-weight:600;display:flex;gap:10px;flex-wrap:wrap;align-items:baseline}
.settings summary span{font-weight:400;font-size:13px}
.settings[open] summary{border-bottom:1px solid var(--line)}
.flabel{font-size:13px;font-weight:600;color:var(--muted)}
.orgs .og{display:grid;gap:3px;align-content:start}
.qed .o{display:flex;gap:8px;align-items:center;padding:2px 6px;border-radius:7px}
.qed .o.right{background:var(--ok-soft)}
.qed .o input[type=text]{flex:1}
.qed .why{font-size:13px;color:var(--muted)}

/* popup + toast */
.pop{position:fixed;inset:0;background:rgba(5,12,23,.55);display:grid;place-items:center;padding:16px;z-index:20}
.pop .box{background:var(--card);color:var(--fg);border-radius:14px;max-width:640px;width:100%;padding:20px;max-height:86vh;overflow:auto}
.pop h3{margin:0 0 4px}
.pop ol{padding-left:22px;margin:12px 0}
.pop li{margin-bottom:8px}
.pop .row{justify-content:flex-end;margin-top:12px}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:9px 16px;border-radius:9px;z-index:30;font-size:14px;max-width:90vw}
@media (prefers-reduced-motion:reduce){.bar>i{transition:none}}
@media (max-width:760px){
  .top{gap:6px 10px;padding:8px 12px}
  #nav{order:3;flex:1 1 100%;flex-wrap:nowrap;overflow-x:auto}
  #nav a{white-space:nowrap;padding:5px 10px}
  .who{margin-left:auto}
  .who span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hero{padding:18px}
}