/* IFARM Learn · ธีมจากดีไซน์เว็บ IFARM ใหม่ (Figma): เหลือง #FFDE00 · ดำ #222529 · พื้นเทาฟ้า #F2F3F7
   สี: เหลือง = ปุ่มได้ของมา (ซื้อ รับ) · เทา = ใช้ของที่มี (อ่าน) · ขอบ = ลองดู · แดง = ราคาลดเท่านั้น · ฟ้า = ของใหม่เท่านั้น */
:root{
  --bg:#F2F3F7;--surface:#FFFFFF;--ink:#222529;--muted:#5E6268;--line:#DCDEE3;
  --yellow:#FFDE00;--yellow-soft:#FFF6B3;--on-yellow:#222529;--chip:#E9EAEE;--tonal:#E1E3E8;
  --stage:#E6E6E1;--paper:#FFFFFF;--red:#FF5050;--blue:#1D5FD1;
  --shadow:0 1px 2px rgba(34,37,41,.04);--shadow-lg:0 10px 30px rgba(34,37,41,.14);
  --f:"Noto Sans Thai",system-ui,sans-serif;color-scheme:light
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#121315;--surface:#1D1F22;--ink:#F1F2F4;--muted:#A9ADB3;--line:#30333A;--yellow-soft:#3A3510;--chip:#2A2D32;--tonal:#33363C;
  --stage:#0A0A09;--paper:#ECECE6;--red:#FF6B6B;--blue:#7EA6F2;--shadow:none;--shadow-lg:0 10px 30px rgba(0,0,0,.5);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#121315;--surface:#1D1F22;--ink:#F1F2F4;--muted:#A9ADB3;--line:#30333A;--yellow-soft:#3A3510;--chip:#2A2D32;--tonal:#33363C;
  --stage:#0A0A09;--paper:#ECECE6;--red:#FF6B6B;--blue:#7EA6F2;--shadow:none;--shadow-lg:0 10px 30px rgba(0,0,0,.5);color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.55 var(--f);-webkit-text-size-adjust:100%}
button,input,textarea{font:inherit;color:inherit}
button{-webkit-tap-highlight-color:transparent}
a{color:inherit;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
h1,h2,h3{margin:0;line-height:1.3;text-wrap:balance}
p{margin:0}

#app{height:100%;display:flex;flex-direction:column;overflow:hidden}
.screen{flex:1;display:flex;flex-direction:column;min-height:0}
.scroll{flex:1;overflow-y:auto;padding:20px max(16px,env(safe-area-inset-right)) 28px max(16px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:22px}
.wrap{width:100%;max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.muted{color:var(--muted)}.small{font-size:13px}
.row{display:flex;align-items:center;gap:12px}.between{justify-content:space-between}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--muted)}

/* ปุ่ม */
.pill{border:none;border-radius:10px;min-height:48px;padding:0 20px;font-weight:600;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;text-decoration:none;white-space:nowrap}
.pill .ic{width:18px;height:18px}
.pill.sm{min-height:44px;padding:0 14px;font-size:14px}
.pill-pri{background:var(--yellow);color:var(--on-yellow)}
.pill-use{background:var(--tonal);color:var(--ink)}
.pill-ghost{background:transparent;box-shadow:inset 0 0 0 1px var(--muted);color:var(--ink)}
.icon-btn{width:44px;height:44px;border-radius:999px;border:none;background:transparent;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);flex:none;padding:0}
.icon-btn .ic{width:22px;height:22px}
.linkbtn{border:none;background:none;padding:0;color:var(--ink);text-decoration:underline;cursor:pointer;font-size:14px;min-height:44px}
.ic{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}

/* หัว / เมนู */
.topbar{display:flex;align-items:center;gap:6px;padding:8px max(8px,env(safe-area-inset-right)) 8px max(8px,env(safe-area-inset-left));padding-top:max(8px,env(safe-area-inset-top));background:var(--surface);border-bottom:1px solid var(--line);min-height:60px;flex:none}
.topbar .t{flex:1;min-width:0}
.topbar .t b{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .t span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.apphead{display:flex;align-items:center;gap:10px;padding:10px max(16px,env(safe-area-inset-right)) 10px max(16px,env(safe-area-inset-left));padding-top:max(10px,env(safe-area-inset-top));background:var(--surface);border-bottom:1px solid var(--line);flex:none}
.apphead .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;text-decoration:none;color:var(--ink)}
.apphead .mark{width:34px;height:34px;border-radius:9px;background:var(--yellow);color:#222529;padding:6px;display:flex}
.apphead .mark svg{width:100%;height:100%}
.apphead nav{display:none;margin-left:24px;gap:4px}
.apphead nav button{border:none;background:none;min-height:40px;padding:0 14px;border-radius:10px;cursor:pointer;color:var(--muted);font-weight:600}
.apphead nav button[aria-current="page"]{background:var(--chip);color:var(--ink)}
.apphead .sp{flex:1}
.nav{flex:none;display:grid;grid-template-columns:repeat(3,1fr);background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.nav button{position:relative;border:none;background:none;min-height:60px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;color:var(--muted);cursor:pointer}
.nav button[aria-current="page"]{color:var(--ink);font-weight:600}
.nav button[aria-current="page"]::before{content:"";position:absolute;top:0;left:50%;width:28px;height:3px;margin-left:-14px;border-radius:0 0 3px 3px;background:var(--ink)}
@media (min-width:700px){.nav{display:none}.apphead nav{display:flex}}

/* ห้องสมุด */
.hello h1{font-size:24px}
.sechead{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.sechead h2{font-size:18px}
.card{background:var(--surface);border-radius:12px;box-shadow:var(--shadow);padding:16px}
.cont{display:flex;gap:14px;align-items:center}
.cover{flex:none;border-radius:4px;overflow:hidden;background:var(--chip);box-shadow:0 2px 8px rgba(0,0,0,.18);aspect-ratio:1/1.414}
.cover img{width:100%;height:100%;object-fit:cover;display:block}
.cont .cover{width:76px}
.cont .grow{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.bar{height:6px;border-radius:999px;background:var(--line);overflow:hidden}.bar i{display:block;height:100%;background:var(--muted)}
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px}
.book{border:none;background:var(--surface);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:8px;text-align:left;cursor:pointer;box-shadow:var(--shadow);color:var(--ink)}
.book .cover{width:100%}
.book b{font-size:13.5px;line-height:1.4}
.book .pct{font-size:12px;color:var(--muted)}
.store{display:flex;gap:14px;background:var(--surface);border-radius:12px;padding:14px;box-shadow:var(--shadow)}
.store .cover{width:92px;align-self:flex-start}
.store .info{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.store .acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.store .acts .pill{flex:1 1 120px}
.price{font-weight:600;font-size:14px}
.tag{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--chip);align-self:flex-start}
.tag.draft{background:transparent;box-shadow:inset 0 0 0 1px var(--muted)}
.empty{padding:28px 8px;text-align:center;color:var(--muted);font-size:14px}
.list{display:grid;gap:12px}
@media (min-width:700px){.list{grid-template-columns:repeat(auto-fill,minmax(400px,1fr))}}
.skeleton{background:var(--chip);border-radius:12px;height:120px;animation:pulseb 1.2s ease-in-out infinite}
@keyframes pulseb{50%{opacity:.5}}

/* หน้าอ่าน */
[data-screen="reader"]{position:relative;background:var(--stage)}
[data-screen="reader"] .topbar,[data-screen="reader"] .readfoot{position:absolute;left:0;right:0;z-index:6;transition:transform .18s ease-out,opacity .18s ease-out}
[data-screen="reader"] .topbar{top:0}[data-screen="reader"] .readfoot{bottom:0}
[data-screen="reader"].immersive .topbar{transform:translateY(-100%);opacity:0;pointer-events:none}
[data-screen="reader"].immersive .readfoot{transform:translateY(100%);opacity:0;pointer-events:none}
.stage{flex:1;position:relative;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.pagewrap{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:14px}
.spread{height:100%;width:100%;display:flex;align-items:center;justify-content:center;gap:6px;transform-origin:center;transition:transform .18s ease,filter .15s;container-type:size}
.spread.nofx{transition:none}
.page{position:relative;background:var(--paper);border-radius:2px;box-shadow:var(--shadow-lg);overflow:hidden;flex:none} /* กว้าง×สูง คำนวณใน app.js ให้ได้สัดส่วนหน้าจริง */
.page canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.page .loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#8B8B85;font-size:13px}
.page .ink{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none;overflow:visible}
.inking .page .ink{pointer-events:auto;cursor:crosshair}
.inking.tool-eraser .page .ink{cursor:cell}
.page .hot{position:absolute;z-index:2;border:none;background:transparent;cursor:pointer;padding:0;border-radius:3px}
.page .hot:hover{background:rgba(29,95,209,.10)}
.inking .page .hot{pointer-events:none}
.lockpage{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:1.1em;padding:8%;color:#222529;font-size:clamp(12px,2.2cqh,17px)}
.lockpage .lk{width:3.4em;height:3.4em;border-radius:999px;background:#222529;display:flex;align-items:center;justify-content:center;color:#FFDE00}
.lockpage .lk .ic{width:1.6em;height:1.6em}
.lockpage h3{font-size:1.5em}
.lockpage p{color:#4A4A45}
.lockpage .pill{font-size:15px}
.lockpage .linkbtn{color:#222529}
.trialbar{position:absolute;top:10px;left:50%;transform:translateX(-50%);background:#222529;color:#fff;border-radius:999px;font-size:12px;padding:6px 14px;z-index:5;white-space:nowrap;transition:top .22s}
[data-screen="reader"]:not(.immersive) .trialbar{top:72px}
.readfoot{background:var(--surface);border-top:1px solid var(--line);padding:8px max(12px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:4px}
.readfoot input[type=range]{width:100%;accent-color:var(--ink);height:28px}
.zoomctl{display:flex;align-items:center;gap:2px}
.zoomval{font-size:12px;color:var(--muted);min-width:42px;text-align:center;font-variant-numeric:tabular-nums}
.minibtn{position:absolute;right:max(12px,env(safe-area-inset-right));bottom:calc(12px + env(safe-area-inset-bottom));min-height:40px;padding:0 14px;border:none;border-radius:999px;background:rgba(34,37,41,.78);color:#fff;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;cursor:pointer;z-index:7;transition:bottom .18s ease-out}
[data-screen="reader"]:not(.immersive) .minibtn{bottom:calc(var(--footH,120px) + 10px)}
.minibar{position:absolute;left:0;right:0;bottom:0;height:3px;z-index:4;pointer-events:none;opacity:0;transition:opacity .18s}
.immersive .minibar{opacity:1}.minibar i{display:block;height:100%;background:var(--muted)}
.inking .minibtn{display:none}
.penbtn{position:relative;isolation:isolate;color:var(--on-yellow)}
.penbtn::after{content:"";position:absolute;inset:4px;border-radius:999px;background:var(--yellow);z-index:-1}
.penbtn[aria-pressed="true"]{color:var(--surface)}.penbtn[aria-pressed="true"]::after{background:var(--ink)}
.penbtn .ic{width:20px;height:20px}
/* กันแคป: เบลอเมื่อสลับแอป/แท็บ หรือกด PrintScreen */
.shield .spread{filter:blur(22px)}
.shieldmsg{position:absolute;inset:0;z-index:9;display:flex;align-items:center;justify-content:center;text-align:center;padding:24px;color:#fff;font-weight:600;background:rgba(0,0,0,.35);pointer-events:none}
@media (prefers-reduced-motion:reduce){.spread,[data-screen="reader"] .topbar,[data-screen="reader"] .readfoot{transition:none}}

/* ขีดเขียน */
.stick{position:absolute;z-index:4;width:38px;height:38px;margin:-19px 0 0 -19px;border:1.5px solid #C9A800;border-radius:8px;background:#FFDE00;color:#222529;box-shadow:0 3px 10px rgba(0,0,0,.28);display:flex;align-items:center;justify-content:center;cursor:pointer;padding:0}
.stick .ic{width:22px;height:22px}
.stick::before{content:"";position:absolute;inset:-7px}
.stick.pulse{animation:pulse .5s ease-in-out 3}
@keyframes pulse{50%{transform:scale(1.5)}}
.inkbar{position:absolute;top:66px;left:50%;transform:translateX(-50%);z-index:8;display:flex;align-items:center;gap:4px;padding:6px;background:var(--surface);border-radius:14px;box-shadow:var(--shadow-lg);max-width:calc(100% - 16px);overflow-x:auto}
.inkbar .tb{width:44px;height:44px;border:none;background:none;border-radius:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none;color:var(--ink)}
.inkbar .tb[aria-pressed="true"]{background:var(--chip)}
.inkbar .tb:disabled{opacity:.35;cursor:default}
.inkbar .sw{width:44px;height:44px;border:none;background:none;display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none;padding:0}
.inkbar .sw i{width:22px;height:22px;border-radius:999px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15)}
.inkbar .sw[aria-pressed="true"] i{box-shadow:0 0 0 2px var(--surface),0 0 0 4px var(--ink)}
.inkbar .sep{width:1px;height:28px;background:var(--line);margin:0 4px;flex:none}
.inkbar .done{min-height:40px;margin-left:4px}
.syncdot{font-size:11px;color:var(--muted);white-space:nowrap;padding:0 6px}

/* แผ่นล่าง / หน้าต่าง */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:20;display:flex;align-items:flex-end}
.sheet{background:var(--surface);width:100%;max-width:600px;margin:0 auto;border-radius:20px 20px 0 0;max-height:80%;display:flex;flex-direction:column;padding-bottom:env(safe-area-inset-bottom)}
.sheet header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 8px}
.sheet header h3{font-size:18px}
.sheet .body{overflow-y:auto;padding:0 8px 16px}
.scrim.top{align-items:flex-start;padding:72px 12px 0}
.scrim.top .sheet{border-radius:18px;max-width:560px;box-shadow:var(--shadow-lg)}
.toc button{width:100%;display:flex;justify-content:space-between;gap:12px;border:none;background:none;text-align:left;padding:12px;border-radius:12px;cursor:pointer;color:var(--ink)}
.toc button:hover{background:var(--bg)}
.toc .pg{color:var(--muted);font-variant-numeric:tabular-nums;font-size:13px;flex:none}
.toc .locked{color:var(--muted)}
.toc h4{margin:14px 12px 4px;font-size:12px;color:var(--muted);letter-spacing:.05em}
.toc .nprev{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search{display:flex;align-items:center;gap:8px;margin:4px 0 8px;padding:0 12px;border:1px solid var(--line);border-radius:10px;min-height:44px;color:var(--muted);background:var(--surface)}
.search input{flex:1;border:none;background:none;font-size:16px;color:var(--ink);outline:none;min-width:0}
textarea.note{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;font-size:16px;color:var(--ink);background:var(--surface);resize:vertical}

/* โน้ตของฉัน */
.nitem{display:flex;flex-direction:column;gap:4px;width:100%;text-align:left;border:none;background:var(--surface);border-radius:12px;padding:12px 14px;cursor:pointer;color:var(--ink);box-shadow:var(--shadow);border-left:4px solid var(--yellow)}
.nitem .ntext{font-size:15px;line-height:1.5;white-space:pre-wrap;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.nitem .nmeta{font-size:12px;color:var(--muted)}.nitem .nmeta b{color:var(--ink);font-weight:600}
.ngroup{display:flex;flex-direction:column;gap:8px}
.nhead{display:flex;align-items:center;gap:12px;margin:6px 0 2px}.nhead .cover{width:40px}
.seg{display:inline-flex;background:var(--chip);border-radius:999px;padding:3px;gap:2px}
.seg button{border:none;background:none;border-radius:999px;padding:6px 12px;font-size:12px;cursor:pointer;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);font-weight:600;box-shadow:var(--shadow)}
.exopt{display:flex;align-items:center;gap:12px;width:100%;min-height:56px;padding:8px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);font-size:15px;font-weight:600;text-align:left;cursor:pointer}
.exopt small{display:block;font-weight:400;color:var(--muted);font-size:12.5px}
.expreview{user-select:text;-webkit-user-select:text;margin:0;max-height:160px;overflow:auto;background:var(--bg);border-radius:10px;padding:10px 12px;font:12.5px/1.55 var(--f);white-space:pre-wrap;color:var(--muted)}
.howto{display:flex;flex-direction:column;gap:12px;padding:12px 0;text-align:center;align-items:center}
.howto ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;text-align:left;width:100%;max-width:420px}
.howto li{display:flex;align-items:center;gap:12px;background:var(--surface);border-radius:12px;padding:10px 12px;box-shadow:var(--shadow);font-size:14px}
.stepic{width:40px;height:40px;border-radius:999px;display:flex;align-items:center;justify-content:center;flex:none;background:var(--chip)}.stepic.y{background:var(--yellow);color:#222529}
.stepic .ic{width:20px;height:20px}
.acct{display:flex;flex-direction:column;gap:12px}
.acct .who{display:flex;gap:12px;align-items:center}
.avatar{width:52px;height:52px;border-radius:999px;background:var(--yellow);display:flex;align-items:center;justify-content:center;font-weight:700;color:#222529;font-size:20px;flex:none}
.toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:14px;z-index:40;max-width:calc(100% - 32px);text-align:center;box-shadow:var(--shadow-lg)}

/* ห้ามพิมพ์: หนังสืออ่านในแอปเท่านั้น */
@media print{body *{display:none!important}body::after{content:"e-book ของ IFARM อ่านได้ในแอป IFARM Learn เท่านั้น · learn.ifarm.co.th";display:block;padding:40px;font:16px sans-serif}}
/* จอมือถือ: แถบเครื่องมือขีดเขียนขึ้น 2 แถว ให้เห็นปุ่ม "เสร็จ" เสมอ */
@media (max-width:560px){.inkbar{flex-wrap:wrap;justify-content:center;overflow:visible;width:calc(100% - 16px);gap:2px}.inkbar .sep{display:none}.inkbar .syncdot{order:9;width:100%;text-align:center;padding:0}}