/* ห้องเรียนยิงแอด Facebook — โทนกรมท่า/น้ำเงิน/ส้ม ตามปกอีบุ๊ก */
:root{
  --bg:#F4F3EF; --surface:#FFFFFF; --sunk:#ECEAE3; --ink:#13213F; --muted:#5A6580; --line:#E0DDD4;
  --blue:#1F5BD8; --blue-soft:#E4ECFC; --orange:#DD8424; --orange-soft:#FBEBD8; --ok:#1C8F63; --ok-soft:#DDF2E8; --bad:#C2410C; --bad-soft:#FCE8DE;
  --navy:#13213F; --navy-2:#1B2C52; --on-navy:#F2F4F9; --on-navy-muted:#A9B4CD;
  --f-display:"Prompt","Noto Sans Thai",system-ui,sans-serif;
  --f-body:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;
  --r:14px; color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0C1529; --surface:#142039; --sunk:#0F1A31; --ink:#EDF0F7; --muted:#9BA7C2; --line:#25345A;
  --blue:#6F9BFF; --blue-soft:#1A2D5C; --orange:#F2A04A; --orange-soft:#3A2A16; --ok:#43C892; --ok-soft:#123A2C; --bad:#FF8A5B; --bad-soft:#3D1F14;
  --navy:#0A1226; --navy-2:#16244A; color-scheme:dark}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:600;line-height:1.25;margin:0;text-wrap:balance}
p{margin:0}
a{color:var(--blue)}
img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--f-display);font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--orange);font-weight:500}
.muted{color:var(--muted)}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.hint{font-size:13px;color:var(--muted)}
main{flex:1;padding-block:28px 64px}
.foot{border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.foot .wrap{padding-block:18px calc(18px + env(safe-area-inset-bottom,0px))}

/* header */
.top{position:sticky;top:0;z-index:20;background:var(--navy);color:var(--on-navy);padding-top:env(safe-area-inset-top,0px)}
.top .wrap{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap;padding-block:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.brand-mark{width:30px;height:30px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#3F7BFF,#1A47B8 70%);position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;width:13px;height:13px;border-radius:50%;background:#E08A23;right:-3px;bottom:-2px;border:2px solid var(--navy)}
.brand b{font-family:var(--f-display);font-weight:600;font-size:16px;display:block;line-height:1.1}
.brand small{color:var(--on-navy-muted);font-size:12px}
.topnav{display:flex;gap:4px;margin-left:auto}
.topnav a{color:var(--on-navy-muted);text-decoration:none;padding:6px 12px;border-radius:8px;font-size:14px}
.topnav a[aria-current="page"],.topnav a:hover{color:var(--on-navy);background:var(--navy-2)}
.me{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--on-navy-muted)}
.me form{margin:0}
.ring{--p:0;width:34px;height:34px;border-radius:50%;background:conic-gradient(#E08A23 calc(var(--p)*1%),#2A3B66 0);display:grid;place-items:center;flex:none}
.ring span{width:26px;height:26px;border-radius:50%;background:var(--navy);display:grid;place-items:center;font-size:9.5px;color:var(--on-navy);font-family:var(--f-mono)}
.me .addr{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.linkbtn{background:none;border:0;color:var(--on-navy-muted);text-decoration:underline;padding:0;font-size:13px}
@media (max-width:760px){.me .addr{display:none}.topnav{order:3;width:100%;margin-left:0}.top .wrap{gap:10px}.me{margin-left:auto}}

/* generic */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:11px 20px;font-family:var(--f-display);font-weight:500;font-size:15px;text-decoration:none;line-height:1.3}
.btn-primary{background:var(--blue);color:#fff}
.btn-accent{background:#E08A23;color:#1B1405}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn-sm{padding:6px 12px;font-size:13.5px}
.btn-danger{background:transparent;border:1px solid var(--bad);color:var(--bad)}
.btn[aria-disabled="true"],.btn:disabled{opacity:.45;pointer-events:none}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;border-radius:999px;padding:2px 10px;font-weight:500;white-space:nowrap}
.pill.done{background:var(--ok-soft);color:var(--ok)}
.pill.prog{background:var(--orange-soft);color:var(--orange)}
.pill.new,.pill.lock{background:var(--sunk);color:var(--muted)}
.pill.bad{background:var(--bad-soft);color:var(--bad)}
.bar{height:8px;border-radius:99px;background:var(--sunk);overflow:hidden}
.bar i{display:block;height:100%;background:var(--blue);border-radius:99px;transition:width .3s}
.flash{padding:12px 16px;border-radius:10px;margin-bottom:18px;font-size:14px}
.flash.ok{background:var(--ok-soft);color:var(--ok)}
.flash.err{background:var(--bad-soft);color:var(--bad)}
.field{display:grid;gap:6px}
.field label{font-size:14px;font-weight:500}
.field input,.field textarea{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:12px 14px;font-size:15px;width:100%}
.field input:focus,.field textarea:focus{outline:2px solid var(--blue);outline-offset:0;border-color:transparent}
.err{font-size:13.5px;color:var(--bad)}
.section-title{display:flex;justify-content:space-between;align-items:end;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.section-title h1{font-size:clamp(24px,3vw,32px)}

/* login */
body.is-login main{padding:0}
.login{display:grid;grid-template-columns:1.1fr 1fr;min-height:100vh}
.login-hero{background:var(--navy);color:var(--on-navy);position:relative;overflow:hidden;padding:56px max(24px,env(safe-area-inset-left,0px)) 48px}
.login-hero::before{content:"";position:absolute;width:520px;height:520px;right:-180px;top:-140px;border-radius:50%;background:radial-gradient(circle,#2563EB 0%,rgba(37,99,235,.35) 40%,transparent 70%)}
.login-hero::after{content:"";position:absolute;width:150px;height:150px;right:60px;bottom:70px;border-radius:50%;background:#E08A23}
.login-hero>*{position:relative;z-index:1;max-width:520px}
.login-hero h1{font-size:clamp(34px,5vw,54px);font-weight:700;margin:14px 0 12px}
.login-hero .lede{color:var(--on-navy-muted);font-size:16px}
.steps{list-style:none;padding:0;margin:36px 0 0;display:grid;gap:14px}
.steps li{display:grid;grid-template-columns:34px 1fr;gap:14px;align-items:start}
.steps .n{width:34px;height:34px;border-radius:50%;border:1px solid #3A4C7A;display:grid;place-items:center;font-family:var(--f-display);color:#F2A04A}
.steps b{font-family:var(--f-display);font-weight:500;display:block}
.steps small{color:var(--on-navy-muted);font-size:13.5px}
.steps a{color:#F2A04A}
.login-form{display:flex;align-items:center;justify-content:center;padding:40px max(20px,env(safe-area-inset-right,0px)) 40px max(20px,env(safe-area-inset-left,0px))}
.form{width:100%;max-width:400px;display:grid;gap:18px}
.form h2{font-size:26px}
.mail-ic{width:56px;height:56px;border-radius:14px;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue)}
@media (max-width:860px){.login{grid-template-columns:1fr;min-height:0}.login-hero{padding-block:40px}.login-hero::after{width:70px;height:70px;right:-18px;top:28px;bottom:auto}}

/* course */
.welcome{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-bottom:36px}
.resume{background:var(--navy);color:var(--on-navy);border-radius:var(--r);padding:26px;display:grid;gap:14px;position:relative;overflow:hidden;align-content:start}
.resume::after{content:"";position:absolute;width:220px;height:220px;right:-70px;bottom:-90px;border-radius:50%;background:radial-gradient(circle,#2563EB,transparent 70%);opacity:.8}
.resume>*{position:relative;z-index:1}
.resume h2{font-size:24px}
.resume .muted{color:var(--on-navy-muted)}
.resume .bar{background:#24365F}.resume .bar i{background:#E08A23}
.stats{display:grid;gap:14px;padding:22px}
.stat-row{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.big{font-family:var(--f-display);font-size:34px;font-weight:600;line-height:1}
.ebook-mini{display:flex;gap:14px;align-items:center;border-top:1px solid var(--line);padding-top:14px}
.ebook-mini img{width:96px;border-radius:6px;box-shadow:0 4px 14px rgba(19,33,63,.25);flex:none}
@media (max-width:860px){.welcome{grid-template-columns:1fr}}
.part{display:grid;grid-template-columns:200px 1fr;gap:24px;padding-block:22px;border-top:1px solid var(--line)}
.part-head .num{font-family:var(--f-display);font-size:30px;font-weight:600;color:var(--orange);line-height:1}
.part:nth-of-type(even) .part-head .num{color:var(--blue)}
.part-head h3{font-size:17px;margin:6px 0 4px}
.part-head small{color:var(--muted);font-size:13px}
.lessons{display:grid;gap:8px;min-width:0}
.lesson{display:grid;grid-template-columns:52px 1fr auto;gap:14px;align-items:center;padding:12px 16px;background:var(--surface);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;min-width:0}
a.lesson:hover{border-color:var(--blue)}
.lesson.is-locked{opacity:.6}
.lesson .code{font-family:var(--f-mono);font-size:14px;color:var(--muted)}
.lesson .t{font-family:var(--f-display);font-weight:500;font-size:15.5px}
.lesson .s{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lesson .meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;font-size:12px;color:var(--muted)}
.lesson>div{min-width:0}
.check{width:22px;height:22px;border-radius:50%;background:var(--ok);color:#fff;display:inline-grid;place-items:center;flex:none}
@media (max-width:760px){.part{grid-template-columns:1fr;gap:12px}.lesson{grid-template-columns:40px 1fr}.lesson .meta{grid-column:2;flex-direction:row;align-items:center;justify-content:flex-start}}

/* lesson */
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px;display:flex;gap:6px;flex-wrap:wrap}
.crumbs a{color:var(--muted)}
.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
@media (max-width:980px){.lesson-grid{grid-template-columns:1fr}}
.player{border-radius:var(--r);overflow:hidden;background:#0A1226;color:#fff}
.screen{aspect-ratio:16/9;width:100%;max-width:100%;position:relative;display:grid;place-items:center;overflow:hidden}
.screen iframe,.screen #yt{position:absolute;inset:0;width:100%;height:100%;border:0}
.screen.whiteboard{background:#F7F6F1;color:#13213F;background-image:linear-gradient(#E6E3DA 1px,transparent 1px),linear-gradient(90deg,#E6E3DA 1px,transparent 1px);background-size:28px 28px}
.screen.classic{background:radial-gradient(circle at 78% 30%,#2056D6 0,#13213F 55%);color:#fff}
.screen.watercolor{background:radial-gradient(ellipse at 20% 30%,#F6D7B0 0,transparent 55%),radial-gradient(ellipse at 80% 70%,#BFD3F7 0,transparent 55%),#FBF8F2;color:#13213F}
.screen .poster{text-align:center;padding:24px;max-width:84%}
.screen .poster .eyebrow{color:#E08A23}
.screen .poster h2{font-size:clamp(20px,3.4vw,34px);margin-top:8px}
.screen .poster p{opacity:.75;font-size:14px;margin-top:8px}
.screen .soon{display:inline-block;margin-top:16px;font-size:13px;padding:6px 14px;border-radius:999px;background:rgba(224,138,35,.16);color:#B5650F;font-weight:500}
.screen.classic .soon{color:#F2A04A}
.watched-strip{display:flex;height:6px;background:#2A3758}
.watched-strip i{flex:1}
.watched-strip i.on{background:#E08A23}
.watch{padding:18px 20px;display:grid;gap:12px;margin-top:16px}
.watch-top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.meter{position:relative;height:12px;border-radius:99px;background:var(--sunk)}
.meter i{display:block;height:100%;border-radius:99px;background:var(--orange);transition:width .25s}
.meter.ok i{background:var(--ok)}
.meter .goal{position:absolute;top:-6px;bottom:-6px;width:2px;background:var(--ink)}
.meter .goal span{position:absolute;top:-20px;left:50%;transform:translateX(-50%);font-size:11px;font-family:var(--f-mono);white-space:nowrap}
.lesson-info{margin-top:22px;display:grid;gap:14px}
.lesson-info h1{font-size:clamp(24px,3vw,30px)}
.topics{display:flex;flex-wrap:wrap;gap:6px}
.topics span{font-size:13px;border:1px solid var(--line);border-radius:999px;padding:3px 12px;background:var(--surface)}
.navrow{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:8px}
.side{padding:8px;max-height:calc(100vh - 100px);overflow:auto;position:sticky;top:76px}
@media (max-width:980px){.side{position:static;max-height:none}}
.side h4{font-size:13px;color:var(--muted);font-weight:500;padding:10px 10px 4px}
.side a,.side span.row{display:grid;grid-template-columns:22px 1fr;gap:10px;padding:8px 10px;border-radius:8px;text-decoration:none;color:inherit;font-size:14px;align-items:center}
.side a:hover{background:var(--sunk)}
.side a[aria-current="page"]{background:var(--blue-soft)}
.side .is-locked{opacity:.5}
.dot{width:20px;height:20px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;color:#fff}
.dot.prog{border-color:var(--orange)}
.dot.done{border-color:var(--ok);background:var(--ok)}
.dot.lock{border:0;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);background:var(--ok);color:#fff;padding:10px 18px;border-radius:999px;font-family:var(--f-display);opacity:0;transition:.3s;pointer-events:none;z-index:50;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ebook */
.reader{display:grid;grid-template-columns:260px minmax(0,1fr);gap:24px;align-items:start}
@media (max-width:900px){.reader{grid-template-columns:1fr}}
.toc{padding:10px}
.toc a{display:flex;justify-content:space-between;padding:8px 10px;border-radius:8px;font-size:14px;gap:10px;color:inherit;text-decoration:none}
.toc a:hover{background:var(--sunk)}
.toc a.on{background:var(--blue-soft)}
.toc .pg{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.page-stage{position:relative;border-radius:10px;overflow:hidden;aspect-ratio:16/9;max-width:100%;background:#fff;border:1px solid var(--line);user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.page-stage img{width:100%;height:100%;object-fit:contain;display:block;pointer-events:none}
.wm{position:absolute;inset:-20%;display:flex;flex-wrap:wrap;gap:60px 80px;align-content:center;justify-content:center;transform:rotate(-24deg);pointer-events:none;opacity:.07;color:#13213F;font-family:var(--f-mono);font-size:15px}
.reader-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;flex-wrap:wrap}
.jump{display:flex;gap:6px;align-items:center}
.jump input{width:70px;border:1px solid var(--line);border-radius:8px;padding:6px 8px;background:var(--surface);text-align:center}
@media print{body{display:none}}

/* admin */
.admin-grid{display:grid;grid-template-columns:380px minmax(0,1fr);gap:24px;align-items:start}
@media (max-width:980px){.admin-grid{grid-template-columns:1fr}}
.panel{padding:22px;display:grid;gap:16px}
.msg{background:var(--sunk);border-radius:12px;padding:14px;font-size:14px;white-space:pre-wrap;user-select:all;margin:0;font-family:var(--f-body)}
.codebox{font-family:var(--f-mono);font-size:22px;letter-spacing:.06em;background:var(--orange-soft);color:var(--orange);padding:10px 14px;border-radius:10px;text-align:center}
.tablewrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:720px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
th{white-space:nowrap;font-weight:500;color:var(--muted);font-size:12.5px;letter-spacing:.04em}
td .bar{width:100px;display:inline-block;vertical-align:middle;margin-right:8px}
td form{display:inline}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.vid-row{display:grid;grid-template-columns:56px minmax(0,1fr) minmax(0,1.3fr) 90px;gap:12px;align-items:center;padding:10px 18px;border-bottom:1px solid var(--line)}
.vid-row input{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:9px 12px;width:100%}
@media (max-width:760px){.vid-row{grid-template-columns:44px 1fr}.vid-row input,.vid-row .st{grid-column:1/-1}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}