/* ════════════════════════════════════════════════════════════════
   สอนดี อะคาเดมี่ — เทมเพลตเว็บขายคอร์สออนไลน์ (1Day1Deaw)
   ปรับแบรนด์ลูกค้าได้ที่ :root (สี/ฟอนต์) ที่เดียว
   ════════════════════════════════════════════════════════════════ */
:root{
  --ink:#1e2b29; --ink-2:#51625f; --ink-3:#8a9895;
  --ground:#f6f7f4; --surface:#ffffff; --line:#e3e8e4;
  --brand:#0d6e63; --brand-dark:#0a544c; --brand-soft:#e3f1ee;
  --cta:#e8762d; --cta-dark:#cf6420;
  --sale:#d64545; --gold:#e2a139; --ok:#2e8b57; --ok-soft:#e5f3ea;
  --dark:#1b2431; --dark-ink:#c8d2dd;
  --r:12px; --shadow:0 1px 3px rgba(30,43,41,.08),0 4px 16px rgba(30,43,41,.06);
  --font:"Sukhumvit Set","Noto Sans Thai","Leelawadee UI","Thonburi",-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{animation:none!important;transition:none!important}}
body{font-family:var(--font);background:var(--ground);color:var(--ink);font-size:15.5px;line-height:1.65}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
button:focus-visible,a:focus-visible{outline:2px solid var(--cta);outline-offset:2px;border-radius:6px}
h1,h2,h3{line-height:1.35;text-wrap:balance}
.num{font-variant-numeric:tabular-nums}
.wrap{max-width:1120px;margin:0 auto;padding:0 18px}

/* ═══ ช่องวางรูป — วางไฟล์ชื่อตรงกับ data-img ในโฟลเดอร์ img/ แล้วรูปขึ้นเอง ═══ */
.ph{position:relative;background:#edf1ee center/cover no-repeat;display:grid;place-items:center;overflow:hidden}
.ph:not(.has-img){border:1.5px dashed #c3cfc9}
.ph:not(.has-img)::before{content:"🖼 " attr(data-img);font-size:11px;color:#93a19c;font-weight:600;position:absolute;top:50%;left:50%;transform:translate(-50%,-60%);white-space:nowrap;max-width:92%;overflow:hidden;text-overflow:ellipsis}
.ph:not(.has-img)::after{content:attr(data-size);font-size:10px;color:#aab6b1;position:absolute;top:50%;left:50%;transform:translate(-50%,60%)}
.ph.round{border-radius:99px}
.ph.has-img::before,.ph.has-img::after{display:none}
/* ช่องรูปขนาดเล็ก (โลโก้/รูปครูแบบย่อ) — ไม่ต้องโชว์ป้ายชื่อไฟล์ */
.mark.ph:not(.has-img)::before,.mark.ph:not(.has-img)::after,
.avatar.ph:not(.has-img)::before,.avatar.ph:not(.has-img)::after{display:none}
.mark.ph:not(.has-img){border:none;background:var(--brand)}
.avatar.ph:not(.has-img){border:none;background:var(--brand-soft)}
.mark.has-img,.avatar.has-img{color:transparent}

/* ═══ Header / Footer ═══ */
.site-head{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:80}
.site-head .wrap{display:flex;align-items:center;gap:22px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px;color:var(--ink)}
.logo .mark{width:34px;height:34px;border-radius:9px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:16px;overflow:hidden}
.nav{display:flex;gap:4px;margin-left:6px}
.nav a{padding:8px 12px;border-radius:8px;color:var(--ink-2);font-weight:600;font-size:14.5px}
.nav a:hover,.nav a.here{color:var(--brand);background:var(--brand-soft)}
.head-r{margin-left:auto;display:flex;align-items:center;gap:10px}
.cart-btn{position:relative;width:38px;height:38px;border-radius:9px;background:var(--ground);display:grid;place-items:center;font-size:17px}
.cart-btn .badge{position:absolute;top:-4px;right:-4px;background:var(--sale);color:#fff;font-size:10.5px;font-weight:700;border-radius:99px;min-width:17px;height:17px;display:grid;place-items:center}
@media(max-width:860px){.nav{display:none}}
.site-foot{background:var(--dark);color:var(--dark-ink);margin-top:60px;padding:40px 0 26px;font-size:14px}
.site-foot .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:26px}
@media(max-width:760px){.site-foot .cols{grid-template-columns:1fr 1fr}}
.site-foot h4{color:#fff;font-size:14px;margin-bottom:10px}
.site-foot a{display:block;color:var(--dark-ink);padding:3px 0}
.site-foot .fine{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:16px;font-size:12.5px;opacity:.7;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.line-fab{position:fixed;right:16px;bottom:16px;z-index:70;background:#06c755;color:#fff;font-weight:800;border-radius:99px;padding:11px 18px;box-shadow:var(--shadow);display:flex;gap:8px;align-items:center}

/* ═══ ปุ่ม ═══ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:10px;padding:10px 18px;transition:background .15s}
.btn-cta{background:var(--cta);color:#fff}
.btn-cta:hover{background:var(--cta-dark)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-dark)}
.btn-ghost{background:var(--surface);border:1.5px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:7px 13px;font-size:13.5px;border-radius:8px}

/* ═══ หน้าแรก ═══ */
.hero{background:linear-gradient(135deg,var(--brand-dark),var(--brand) 55%,#12866f);color:#fff;padding:52px 0 58px}
.hero .wrap{display:grid;grid-template-columns:1.15fr 1fr;gap:36px;align-items:center}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr}}
.hero .eyebrow{display:inline-block;background:rgba(255,255,255,.14);border-radius:99px;padding:4px 14px;font-size:13px;font-weight:700;margin-bottom:14px}
.hero h1{font-size:clamp(26px,4.2vw,40px);font-weight:800;margin-bottom:12px}
.hero p{opacity:.88;max-width:34em;margin-bottom:22px}
.hero .acts{display:flex;gap:10px;flex-wrap:wrap}
.hero .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.35);color:#fff}
.hero-card{background:var(--surface);border-radius:16px;box-shadow:0 18px 40px rgba(0,0,0,.22);overflow:hidden;color:var(--ink);transform:rotate(1.2deg)}
.hero-card .ph{aspect-ratio:16/9}
.hero-card .bd{padding:14px 16px}
.hero-card .bd b{font-size:15px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:-26px;position:relative;z-index:2}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:14px 16px;text-align:center}
.stat b{display:block;font-size:22px;color:var(--brand)}
.stat span{font-size:13px;color:var(--ink-2)}
.sec{padding:44px 0 4px}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:20px}
.sec-head h2{font-size:22px;font-weight:800}
.sec-head a{margin-left:auto;font-weight:700;font-size:14px;white-space:nowrap}
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:720px){.cats{grid-template-columns:repeat(2,1fr)}}
.cat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 16px;display:flex;gap:12px;align-items:center;font-weight:700;transition:border-color .15s;color:var(--ink)}
.cat:hover{border-color:var(--brand)}
.cat .ic{width:42px;height:42px;border-radius:10px;background:var(--brand-soft);display:grid;place-items:center;font-size:20px}
.cat small{display:block;font-weight:500;color:var(--ink-3);font-size:12.5px}

/* ═══ การ์ดคอร์ส ═══ */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:960px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card .cov{aspect-ratio:16/9;position:relative;display:block}
.tag{position:absolute;top:10px;left:10px;background:var(--sale);color:#fff;font-size:11.5px;font-weight:700;border-radius:6px;padding:2px 9px;z-index:2}
.tag.new{background:var(--brand)}
.tag.pre{background:#7c3aed}
.tag.file{background:#334155}
.card .bd{padding:14px 15px 15px;display:flex;flex-direction:column;gap:6px;flex:1}
.card h3{font-size:15.5px;font-weight:700}
.card .tea{font-size:13px;color:var(--ink-2)}
.rate{font-size:13px;color:var(--ink-2)}
.rate b{color:var(--gold)}
.price-row{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:6px}
.price{font-size:18px;font-weight:800;color:var(--brand)}
.price.s{color:var(--sale)}
.was{font-size:13px;color:var(--ink-3);text-decoration:line-through}
.card .btn{margin-top:9px}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:860px){.reviews{grid-template-columns:1fr}}
.rev{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.rev .stars{color:var(--gold);letter-spacing:2px;font-size:13px}
.rev p{font-size:14px;margin:8px 0 12px}
.rev .who{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--ink-2)}
.avatar{width:34px;height:34px;border-radius:99px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:13px;flex-shrink:0;overflow:hidden}
.cta-band{margin-top:56px;background:linear-gradient(120deg,var(--brand-dark),var(--brand));border-radius:18px;color:#fff;padding:36px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.cta-band h2{font-size:22px;font-weight:800}
.cta-band .btn{margin-left:auto}
@media(max-width:680px){.cta-band .btn{margin-left:0}}

/* ═══ รวมคอร์ส ═══ */
.list-lay{display:grid;grid-template-columns:230px 1fr;gap:24px;padding-top:28px}
@media(max-width:860px){.list-lay{grid-template-columns:1fr}}
.filters{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;align-self:start;font-size:14px}
.filters h4{font-size:13px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.6px;margin:14px 0 8px}
.filters h4:first-child{margin-top:0}
.filters label{display:flex;gap:8px;align-items:center;padding:3px 0;color:var(--ink-2)}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px;flex-wrap:wrap}
.search{flex:1;min-width:180px;display:flex;align-items:center;gap:8px;background:var(--surface);border:1.5px solid var(--line);border-radius:10px;padding:9px 13px;color:var(--ink-3)}
.search input{border:none;outline:none;flex:1;font:inherit;color:var(--ink);background:transparent}
.select{background:var(--surface);border:1.5px solid var(--line);border-radius:10px;padding:9px 13px;font-size:14px;color:var(--ink-2)}

/* ═══ รายละเอียดคอร์ส ═══ */
.crumb{font-size:13px;color:var(--ink-3);padding:18px 0 4px}
.detail{display:grid;grid-template-columns:1fr 350px;gap:28px;align-items:start;padding-top:10px}
@media(max-width:900px){.detail{grid-template-columns:1fr}}
.d-head h1{font-size:26px;font-weight:800;margin:6px 0}
.d-head .sub{color:var(--ink-2);margin-bottom:10px}
.meta-row{display:flex;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-2);margin-bottom:16px}
.meta-row b{color:var(--gold)}
.player-ph{aspect-ratio:16/9;border-radius:var(--r)}
.play-btn{width:64px;height:64px;border-radius:99px;background:rgba(255,255,255,.92);color:var(--brand-dark);display:grid;place-items:center;font-size:24px;box-shadow:0 8px 24px rgba(0,0,0,.3);position:relative;z-index:2}
.player-lbl{position:absolute;bottom:12px;left:12px;background:rgba(0,0,0,.55);border-radius:8px;font-size:12.5px;padding:4px 10px;color:#fff;z-index:2}
.buy-box{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:20px;position:sticky;top:82px}
.buy-box .p-big{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.buy-box .p-big .price{font-size:30px}
.count{background:#fdf1f0;border:1px dashed var(--sale);color:var(--sale);border-radius:10px;padding:8px 12px;font-size:13.5px;font-weight:700;margin:12px 0;display:flex;justify-content:space-between;align-items:center}
.buy-box .btn{width:100%;margin-top:8px}
.gets{margin-top:16px;font-size:14px;color:var(--ink-2);list-style:none}
.gets li{padding:4px 0;display:flex;gap:9px}
.gets li::before{content:"✓";color:var(--ok);font-weight:800}
.inst-row{display:flex;gap:12px;align-items:center;margin:14px 0}
.inst-row .avatar{width:44px;height:44px;font-size:16px}
.d-tabs{display:flex;gap:2px;border-bottom:2px solid var(--line);margin:30px 0 18px;overflow-x:auto}
.d-tabs button{padding:10px 16px;font-weight:700;color:var(--ink-2);border-bottom:2.5px solid transparent;margin-bottom:-2px;white-space:nowrap}
.d-tabs button.on{color:var(--brand);border-color:var(--brand)}
.acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.acc-sec+.acc-sec{border-top:1px solid var(--line)}
.acc-h{width:100%;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 18px;font-weight:700;background:var(--ground);text-align:left}
.acc-h small{color:var(--ink-3);font-weight:500}
.acc-b{display:none}
.acc-sec.open .acc-b{display:block}
.lesson{display:flex;align-items:center;gap:12px;padding:11px 18px;border-top:1px solid var(--line);font-size:14.5px}
.lesson .ic{color:var(--ink-3)}
.lesson .dur{margin-left:auto;color:var(--ink-3);font-size:13px}
.pill-free{background:var(--ok-soft);color:var(--ok);font-size:11.5px;font-weight:700;border-radius:99px;padding:1px 9px}
.pill-drip{background:#f1eafd;color:#7c3aed;font-size:11.5px;font-weight:700;border-radius:99px;padding:1px 9px}
.sticky-buy{position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(30,43,41,.09);padding:10px 16px;display:none;align-items:center;gap:12px}
@media(max-width:900px){.sticky-buy{display:flex}}
.sticky-buy .price{font-size:20px}

/* ═══ ตะกร้า / Checkout / ออเดอร์ ═══ */
.co-lay{display:grid;grid-template-columns:1fr 360px;gap:26px;padding-top:30px;align-items:start}
@media(max-width:880px){.co-lay{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.panel+.panel{margin-top:16px}
.panel h3{font-size:16px;margin-bottom:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.step-n{width:26px;height:26px;border-radius:99px;background:var(--brand);color:#fff;font-size:13px;display:grid;place-items:center}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:600px){.fields{grid-template-columns:1fr}}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:5px}
.field input,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:9px;padding:10px 12px;font:inherit;background:var(--surface);color:var(--ink)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand)}
.field input:disabled{background:var(--ground)}
.bump{border:1.5px dashed var(--cta);background:#fdf6ef;border-radius:var(--r);padding:14px 16px;display:flex;gap:12px;align-items:flex-start}
.bump input{margin-top:4px;accent-color:var(--cta)}
.paym{display:grid;gap:10px}
.pay-opt{border:1.5px solid var(--line);border-radius:var(--r);padding:13px 16px;display:flex;gap:12px;align-items:center;cursor:pointer}
.pay-opt.on{border-color:var(--brand);background:var(--brand-soft)}
.pay-opt .ic{font-size:20px}
.pay-opt small{display:block;color:var(--ink-2);font-weight:400}
.qr-box{text-align:center;padding:18px 0 6px}
.qr-frame{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.qr-frame .pp{background:#113566;color:#fff;font-size:11px;font-weight:700;border-radius:6px;padding:3px 10px;margin-bottom:8px;display:inline-block}
.sum-row{display:flex;justify-content:space-between;gap:10px;padding:6px 0;font-size:14.5px}
.sum-row.tot{border-top:1px solid var(--line);margin-top:8px;padding-top:12px;font-weight:800;font-size:17px}
.sum-row.tot .num{color:var(--brand)}
.coupon-ok{background:var(--ok-soft);color:var(--ok);border-radius:8px;padding:7px 11px;font-size:13px;font-weight:700;margin-top:8px}
.timeline{display:flex;margin:6px 0 20px}
.t-step{flex:1;text-align:center;font-size:12.5px;color:var(--ink-3);position:relative}
.t-step .dot{width:26px;height:26px;border-radius:99px;background:var(--line);color:var(--ink-2);display:grid;place-items:center;margin:0 auto 6px;font-size:12px;font-weight:700;position:relative;z-index:2}
.t-step.done .dot{background:var(--ok);color:#fff}
.t-step.now .dot{background:var(--cta);color:#fff}
.t-step.now{color:var(--cta);font-weight:700}
.t-step.done{color:var(--ok)}
.t-step::before{content:"";position:absolute;top:13px;left:-50%;width:100%;height:2.5px;background:var(--line)}
.t-step:first-child::before{display:none}
.t-step.done::before,.t-step.now::before{background:var(--ok)}
.slip-drop{border:2px dashed var(--line);border-radius:var(--r);padding:28px;text-align:center;color:var(--ink-2);cursor:pointer;transition:border-color .15s;width:100%}
.slip-drop:hover{border-color:var(--brand)}

/* ═══ เข้าสู่ระบบ ═══ */
.auth-card{max-width:420px;margin:44px auto;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:28px}
.auth-card h1{font-size:21px;margin-bottom:16px;text-align:center}
.divider{display:flex;align-items:center;gap:12px;color:var(--ink-3);font-size:12.5px;margin:16px 0}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}

/* ═══ พื้นที่ผู้เรียน (/me) ═══ */
.me-lay{display:grid;grid-template-columns:230px 1fr;gap:24px;padding-top:30px}
@media(max-width:860px){.me-lay{grid-template-columns:1fr}}
.me-nav{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:10px;align-self:start;font-size:14.5px}
.me-nav a{display:flex;gap:10px;align-items:center;padding:9px 12px;border-radius:8px;color:var(--ink-2);font-weight:600}
.me-nav a.here{background:var(--brand-soft);color:var(--brand)}
.me-pane{display:none}
.me-pane.on{display:grid;gap:16px}
.continue{background:linear-gradient(120deg,var(--brand-dark),var(--brand));border-radius:16px;color:#fff;padding:22px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.continue .prog{background:rgba(255,255,255,.25);width:180px}
.prog{flex:none;height:8px;background:var(--line);border-radius:99px;overflow:hidden}
.prog i{display:block;height:100%;width:42%;background:linear-gradient(90deg,var(--brand),#1fae94);border-radius:99px}
.mycourse{display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px;align-items:center;flex-wrap:wrap}
.mycourse .ph{width:120px;aspect-ratio:16/9;border-radius:8px;flex-shrink:0}
.mycourse .prog{width:150px}
.expire-warn{font-size:12.5px;color:#b4540a;background:#fdf2e5;border-radius:99px;padding:2px 10px;font-weight:700}
.ref-code{display:flex;gap:10px;align-items:center;background:var(--brand-soft);border:1.5px dashed var(--brand);border-radius:12px;padding:14px 18px}
.ref-code b{font-size:20px;letter-spacing:2px;color:var(--brand)}
.cert-card{display:flex;gap:14px;align-items:center;background:linear-gradient(120deg,#fdfaf1,#faf3df);border:1px solid #e8dcb8;border-radius:var(--r);padding:16px;flex-wrap:wrap}
.cert-card .ic{font-size:34px}

/* ═══ ห้องเรียน ═══ */
.learn-shell{background:#10181c;min-height:100vh;color:#e5ecef}
.learn-top{display:flex;align-items:center;gap:14px;padding:12px 18px;background:#161f25;font-size:14px;flex-wrap:wrap}
.learn-top .back{color:#9fb2ba}
.prog-wrap{flex:1;min-width:140px;display:flex;align-items:center;gap:10px}
.prog-wrap .prog{flex:1;background:#26323a}
.learn-lay{display:grid;grid-template-columns:1fr 330px}
@media(max-width:900px){.learn-lay{grid-template-columns:1fr}}
.stage{padding:18px 18px 40px}
.video-ph{aspect-ratio:16/9;background:#000;border-radius:10px;display:grid;place-items:center;position:relative;overflow:hidden}
.video-ph .wm{position:absolute;top:14%;left:52%;font-size:12px;color:rgba(255,255,255,.28);pointer-events:none;animation:drift 26s linear infinite alternate;z-index:3}
@keyframes drift{to{transform:translate(-160px,120px)}}
.v-controls{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(0,0,0,.75));padding:26px 14px 10px;display:flex;align-items:center;gap:12px;font-size:12.5px;color:#dfe8ec;z-index:3}
.v-bar{flex:1;height:5px;background:rgba(255,255,255,.25);border-radius:99px;overflow:hidden}
.v-bar i{display:block;height:100%;width:37%;background:var(--cta)}
.lesson-nav{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap}
.lesson-nav .btn-ghost{background:#1b262d;border-color:#2c3941;color:#cfdbe1}
.learn-tabs{display:flex;gap:2px;border-bottom:1.5px solid #26323a;margin:8px 0 16px;overflow-x:auto}
.learn-tabs button{padding:9px 14px;font-weight:700;color:#8ea0a9;border-bottom:2.5px solid transparent;margin-bottom:-1.5px;white-space:nowrap;font-size:14px}
.learn-tabs button.on{color:#fff;border-color:var(--cta)}
.learn-pane{font-size:14.5px;color:#c3d0d6;max-width:62em;display:none}
.learn-pane.on{display:block}
.toc{background:#161f25;border-left:1px solid #212c33;max-height:calc(100vh - 60px);overflow:auto;position:sticky;top:0}
@media(max-width:900px){.toc{border-left:none;max-height:none;position:static}}
.toc h4{padding:14px 16px 8px;font-size:13px;color:#8ea0a9;text-transform:uppercase;letter-spacing:.5px}
.toc-sec{padding:8px 16px;font-weight:700;font-size:13.5px;background:#12191e;color:#aebcc3}
.toc .lesson{border-top:1px solid #1d272e;color:#cfdbe1;cursor:pointer}
.toc .lesson.done .st{color:var(--ok)}
.toc .lesson.now{background:#1d2a32;border-left:3px solid var(--cta);padding-left:15px}
.toc .lesson.lock{opacity:.5}
.toc .lesson .dur{color:#6d7f88}
.note-box{width:100%;min-height:110px;background:#1b262d;border:1.5px solid #2c3941;border-radius:10px;color:#dfe8ec;padding:12px;font:inherit;font-size:14px}
.qa-item{background:#161f25;border:1px solid #212c33;border-radius:10px;padding:14px;margin-bottom:10px}
.qa-item .who{font-size:12.5px;color:#8ea0a9;margin-bottom:4px}
.badge-inst{background:var(--brand);color:#fff;font-size:10.5px;border-radius:99px;padding:1px 8px;margin-left:6px}

/* ═══ หลังบ้าน ═══ */
.adm{display:grid;grid-template-columns:225px 1fr;min-height:100vh}
@media(max-width:860px){.adm{grid-template-columns:1fr}.adm-nav{position:static!important;height:auto!important;flex-direction:row!important;overflow-x:auto;padding:8px!important}}
.adm-nav{background:var(--dark);color:var(--dark-ink);padding:16px 10px;display:flex;flex-direction:column;gap:2px;font-size:14px;position:sticky;top:0;height:100vh;overflow:auto}
.adm-nav .brand{color:#fff;font-weight:800;padding:4px 12px 14px;font-size:15px;white-space:nowrap}
.adm-nav a{display:flex;gap:10px;align-items:center;color:var(--dark-ink);padding:8px 12px;border-radius:8px;font-weight:600;white-space:nowrap}
.adm-nav a.here{background:rgba(255,255,255,.1);color:#fff}
.adm-nav .n-badge{margin-left:auto;background:var(--sale);color:#fff;font-size:11px;border-radius:99px;min-width:19px;height:19px;display:grid;place-items:center;font-weight:700}
.adm-main{padding:24px;background:var(--ground)}
.adm-main h1{font-size:21px;margin-bottom:4px}
.adm-sub{color:var(--ink-2);font-size:13.5px;margin-bottom:20px}
.adm-view{display:none}
.adm-view.on{display:block}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
@media(max-width:960px){.kpis{grid-template-columns:repeat(2,1fr)}}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:15px 17px}
.kpi .lbl{font-size:12.5px;color:var(--ink-2);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.kpi .val{font-size:24px;font-weight:800;margin:2px 0}
.kpi .dif{font-size:12.5px;font-weight:700}
.dif.up{color:var(--ok)} .dif.dn{color:var(--sale)}
.kpi.warn{border-color:#f0c9a4;background:#fdf8f1}
.kpi.warn .val{color:var(--cta)}
.adm-cols{display:grid;grid-template-columns:1.6fr 1fr;gap:16px;align-items:start}
@media(max-width:960px){.adm-cols{grid-template-columns:1fr}}
.chart-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.chart-card h3{font-size:15px;margin-bottom:2px}
.chart-card .cap{font-size:12.5px;color:var(--ink-3);margin-bottom:10px}
#chart{width:100%;height:auto;display:block}
.chart-tip{position:fixed;z-index:99;background:var(--ink);color:#fff;font-size:12px;border-radius:7px;padding:5px 9px;pointer-events:none;display:none;white-space:nowrap}
.slipcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px;display:flex;gap:14px;margin-bottom:12px;align-items:flex-start}
.slip-img{width:86px;height:118px;border-radius:8px;flex-shrink:0}
.slipcard .info{flex:1;font-size:13.5px;min-width:0}
.slipcard .info b{font-size:14.5px}
.verify{display:inline-flex;gap:6px;align-items:center;background:var(--ok-soft);color:var(--ok);font-size:12px;font-weight:700;border-radius:99px;padding:2px 10px;margin-top:4px}
.verify.bad{background:#fdecec;color:var(--sale)}
.slip-acts{display:flex;flex-direction:column;gap:8px}
.top5{list-style:none}
.top5 li{display:flex;gap:10px;align-items:center;padding:8px 0;border-top:1px solid var(--line);font-size:14px}
.top5 li:first-child{border-top:none}
.top5 .rank{width:24px;height:24px;border-radius:7px;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:12.5px;display:grid;place-items:center}
.top5 .amt{margin-left:auto;font-weight:700}
.integ{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.chip{display:inline-flex;gap:7px;align-items:center;border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:5px 13px;font-size:13px;font-weight:600}
.dot-ok{width:8px;height:8px;border-radius:99px;background:var(--ok)}
.dot-bad{width:8px;height:8px;border-radius:99px;background:var(--sale)}
.feat-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.feat-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-top:1px solid var(--line);font-size:14px}
.feat-row:first-child{border-top:none}
.feat-row code{font-size:12px;color:var(--ink-3);background:var(--ground);border-radius:6px;padding:1px 8px}
.sw{margin-left:auto;width:38px;height:22px;border-radius:99px;background:#cdd6d2;position:relative;flex-shrink:0;transition:background .15s;cursor:pointer}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:99px;background:#fff;transition:left .15s}
.sw.on{background:var(--ok)}
.sw.on::after{left:19px}
.tbl-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
.tbl th{text-align:left;font-size:11.5px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:10px 14px;border-bottom:1px solid #eef1ee;vertical-align:middle}
.tbl tr:last-child td{border-bottom:none}
.tbl tbody tr:hover td{background:#fafbf9}
.st{display:inline-block;font-size:11.5px;font-weight:700;border-radius:99px;padding:2px 11px;white-space:nowrap}
.st.paid{background:var(--ok-soft);color:var(--ok)}
.st.rev{background:#fdf2e5;color:#b4540a}
.st.wait{background:#eef1f6;color:#51627f}
.st.cancel{background:#f0f0f0;color:#8a8a8a}
.st.pub{background:var(--brand-soft);color:var(--brand)}
.st.draft{background:#f0f0f0;color:#8a8a8a}
.chips-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.fchip{border:1.5px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 15px;font-size:13px;font-weight:700;color:var(--ink-2);cursor:pointer}
.fchip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.adm-toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.adm-toolbar .search{flex:1;min-width:170px}
.quota-bar{height:9px;background:var(--line);border-radius:99px;overflow:hidden;margin:6px 0}
.quota-bar i{display:block;height:100%;width:40%;background:var(--brand);border-radius:99px}
.builder{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.b-sec{display:flex;gap:10px;align-items:center;background:var(--ground);padding:11px 16px;font-weight:700;border-top:1px solid var(--line)}
.b-sec:first-child{border-top:none}
.b-les{display:flex;gap:10px;align-items:center;padding:9px 16px 9px 34px;border-top:1px solid #eef1ee;font-size:14px;flex-wrap:wrap}
.drag{color:var(--ink-3);cursor:grab;font-size:15px}
.src-badge{font-size:10.5px;font-weight:700;border-radius:6px;padding:1px 8px;white-space:nowrap}
.src-badge.yt{background:#fdecec;color:#c02929}
.src-badge.bn{background:#fdf2e5;color:#b4540a}
.src-badge.r2{background:var(--brand-soft);color:var(--brand)}
.b-les .end{margin-left:auto;display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--ink-3)}
.quick-add{display:flex;gap:8px;padding:12px 16px;border-top:1px solid var(--line)}
.quick-add input{flex:1;border:1.5px dashed var(--line);border-radius:9px;padding:8px 12px;font:inherit;font-size:14px;background:var(--ground);color:var(--ink)}
.mod-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:12px}
.mod-card .who{font-size:12.5px;color:var(--ink-3);margin-bottom:4px}
.mod-acts{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap;align-items:center}
.dbar-row{display:grid;grid-template-columns:150px 1fr 62px;gap:12px;align-items:center;font-size:13px;padding:5px 0}
.dbar{height:16px;background:#eef1ee;border-radius:5px;overflow:hidden}
.dbar i{display:block;height:100%;background:var(--brand);border-radius:5px 0 0 5px}
.dbar-row .pct{text-align:right;font-weight:700;color:var(--ink-2)}
.set-pane{display:none}
.set-pane.on{display:grid;gap:16px}

/* ═══ บทความ / เพจ ═══ */
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.post-card .ph{aspect-ratio:16/8}
.post-card .bd{padding:16px;display:flex;flex-direction:column;gap:6px;flex:1}
.post-card .cat{font-size:11.5px;font-weight:700;color:var(--brand)}
.post-card h3{font-size:16px}
.post-card p{font-size:13.5px;color:var(--ink-2)}
.prose{max-width:46em;font-size:15.5px}
.prose .cat{font-size:12px;font-weight:700;color:var(--brand)}
.prose h1{font-size:26px;margin:8px 0 14px}
.prose h3{font-size:17px;margin:20px 0 8px}
.prose p{margin-bottom:12px}
.prose ul{margin:0 0 12px 22px}
.prose .ph{aspect-ratio:16/8;border-radius:var(--r);margin:14px 0}

/* ═══ เมื่อรูปจริงโหลดแล้ว: ซ่อนตัวอักษร/สีสำรองของโลโก้และรูปครู (ต้องอยู่ท้ายไฟล์ให้ชนะ cascade) ═══ */
.logo .mark.has-img{color:transparent;background-color:transparent}
.avatar.has-img{color:transparent}

/* ═══ Toast ═══ */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;border-radius:10px;padding:11px 20px;font-size:14px;font-weight:600;opacity:0;pointer-events:none;transition:all .25s;z-index:99;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%)}