/* ===== E-Catalog — meebun.co.th ===== */
:root{
  --bg:#f4f5f7; --fg:#15181d; --muted:#6b7280;
  --card:#fff; --line:#e3e6ea;
  --brand:#b8102e;            /* ปรับเป็นสีแบรนด์ได้ที่นี่ */
  --reader-bg:#16181c;
  --bar-h:52px;
  --radius:12px;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:"Roboto","Kanit",-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,sans-serif;
  color:var(--fg); background:var(--bg); -webkit-text-size-adjust:100%;
}
img{max-width:100%;display:block}
[hidden]{display:none!important}
button{font:inherit;color:inherit}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- หน้ารวม ---------- */
.home{max-width:1200px;margin:0 auto;padding:clamp(24px,5vw,56px) 16px 64px}
.home-head h1{margin:0 0 6px;font-size:clamp(26px,4vw,40px);font-weight:600;letter-spacing:-.01em}
.home-head p{margin:0 0 28px;color:var(--muted);font-weight:300}
.grid{display:grid;gap:clamp(16px,3vw,28px);grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;text-decoration:none;color:inherit;display:flex;flex-direction:column;
  transition:transform .18s ease, box-shadow .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(16,24,40,.13)}
.card-cover{position:relative;aspect-ratio:3/4;background:#dfe3e8;display:grid;place-items:center;overflow:hidden}
.card-cover img,.card-cover canvas{width:100%;height:100%;object-fit:cover}
.card-cover .ph{color:#9aa3ad;font-size:13px}
.card-body{padding:12px 14px 16px}
.card-title{margin:0 0 4px;font-size:15px;font-weight:500;line-height:1.35}
.card-meta{margin:0;font-size:12px;color:var(--muted)}
.empty{margin-top:32px;color:var(--muted)}
.empty code{background:#e7eaee;padding:2px 6px;border-radius:5px}

/* ---------- หน้าอ่าน ---------- */
.reader{position:fixed;inset:0;background:var(--reader-bg);overflow:hidden}
.stage{position:absolute;inset:0;outline:none}

/* แถบบน: จางลง 50% ไม่รบกวนสายตาเวลาอ่าน */
.bar{
  position:absolute;top:0;left:0;right:0;z-index:40;
  height:calc(var(--bar-h) + env(safe-area-inset-top,0px));
  padding:env(safe-area-inset-top,0px) 10px 0;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  background:linear-gradient(to bottom,rgba(10,12,15,.85),rgba(10,12,15,0));
  color:#fff;opacity:.5;transition:opacity .25s ease;
}
.bar:hover,.bar:focus-within,.reader.ui-active .bar{opacity:1}
.bar-left{justify-self:start;display:flex;gap:6px}
.bar-center{justify-self:center}
.bar-right{justify-self:end;display:flex;align-items:center;gap:4px}

.icon-btn{
  appearance:none;background:rgba(255,255,255,.1);border:0;border-radius:9px;
  width:34px;height:34px;display:grid;place-items:center;cursor:pointer;
  color:#fff;text-decoration:none;font-size:16px;line-height:1;transition:background .15s;
}
.icon-btn:hover{background:rgba(255,255,255,.24)}
/* ปุ่มแบบตัวอักษร เช่น MENU */
.text-btn{width:auto;padding:0 13px;font-size:12px;font-weight:500;letter-spacing:.1em}
.page-info{font-size:12.5px;font-variant-numeric:tabular-nums;opacity:.9;margin-right:4px;white-space:nowrap}

/* toggle สลับ view — อยู่บนสุดตรงกลาง */
.toggle{display:flex;background:rgba(255,255,255,.12);border-radius:999px;padding:3px;backdrop-filter:blur(6px)}
.toggle-btn{
  appearance:none;background:transparent;border:0;border-radius:999px;cursor:pointer;
  display:flex;align-items:center;gap:6px;padding:6px 14px;font-size:13px;color:#fff;
  white-space:nowrap;transition:background .15s,color .15s;
}
.toggle-btn svg{width:16px;height:16px}
.toggle-btn[aria-selected="true"]{background:#fff;color:#15181d}
@media (max-width:520px){ .toggle-btn span{display:none} .toggle-btn{padding:7px 12px} }

/* ลูกศรซ้าย/ขวา */
.nav-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:30;
  width:44px;height:64px;border:0;border-radius:10px;cursor:pointer;
  background:rgba(255,255,255,.08);color:#fff;font-size:30px;line-height:1;
  opacity:.35;transition:opacity .2s,background .2s;
}
.nav-arrow:hover{opacity:1;background:rgba(255,255,255,.2)}
.nav-arrow.prev{left:8px}.nav-arrow.next{right:8px}
.nav-arrow[disabled]{opacity:.08;cursor:default}
@media (max-width:640px){ .nav-arrow{width:34px;height:52px;font-size:24px} }
.reader.view-scroll .nav-arrow{display:none}

/* ---------- โหมดเลื่อนอ่าน ---------- */
.scroll-view{
  position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  padding:calc(var(--bar-h) + 16px) 12px 48px;
}
.scroll-inner{margin:0 auto;display:flex;flex-direction:column;gap:14px}
.pg{position:relative;background:#fff;box-shadow:0 4px 18px rgba(0,0,0,.35);width:100%}
.pg canvas{width:100%;height:auto;display:block}
.pg::after{
  content:attr(data-label);position:absolute;bottom:6px;right:8px;
  font-size:11px;color:#6b7280;background:rgba(255,255,255,.8);
  padding:1px 6px;border-radius:5px;pointer-events:none;
}

/* ---------- โหมดพลิกหน้า ---------- */
.flip-view{position:absolute;inset:0;display:grid;place-items:center;
  padding:calc(var(--bar-h) + 8px) 8px 16px;perspective:2400px;touch-action:pan-y}
.gutter{position:absolute;top:0;width:30px;margin-left:-15px;z-index:20;pointer-events:none;
  background:linear-gradient(to right,rgba(0,0,0,0),rgba(0,0,0,.26),rgba(0,0,0,0))}
.book{position:relative;transform-style:preserve-3d}
.leaf{
  position:absolute;top:0;height:100%;
  transform-style:preserve-3d;transform-origin:left center;
  transition:transform .62s cubic-bezier(.35,.02,.25,1);
  will-change:transform;
}
.book.spread .leaf{left:50%;width:50%}
.book.single .leaf{left:0;width:100%}
.face{
  position:absolute;inset:0;background:#fff;overflow:hidden;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
}
.face canvas{width:100%;height:100%;display:block}
.face.front{transform:rotateY(0deg)}
.face.back{transform:rotateY(180deg)}
/* ด้านหลังกระดาษ (หน้าว่าง / ปกหลัง) */
.face.blank{background:
  linear-gradient(to right,rgba(0,0,0,.10),rgba(0,0,0,0) 30%,rgba(0,0,0,0) 70%,rgba(0,0,0,.06)),#fbfbfb}
.leaf.tucked{visibility:hidden}
.face .lbl{position:absolute;bottom:6px;font-size:11px;color:#9aa3ad}
.face.front .lbl{right:8px}
.face.back .lbl{left:8px}
.leaf.flipped{transform:rotateY(-180deg)}
.flip-hit{position:absolute;top:0;bottom:0;width:22%;z-index:35;cursor:pointer}
.flip-hit.l{left:0}.flip-hit.r{right:0}

/* ---------- ลิ้นชัก ---------- */
.drawer{
  position:fixed;top:0;bottom:0;left:0;width:min(330px,86vw);z-index:60;
  background:#1c1f25;color:#f3f4f6;transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.3,.1,.2,1);
  display:flex;flex-direction:column;box-shadow:8px 0 30px rgba(0,0,0,.45);
  padding-top:env(safe-area-inset-top,0px);
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;
  padding:14px 12px 12px 16px;border-bottom:1px solid rgba(255,255,255,.1)}
.drawer-list{flex:1;overflow-y:auto;padding:8px}
.drawer-item{
  display:flex;gap:12px;align-items:center;width:100%;text-align:left;
  padding:9px 10px;border-radius:10px;border:0;background:transparent;color:inherit;
  cursor:pointer;text-decoration:none;
}
.drawer-item:hover{background:rgba(255,255,255,.08)}
.drawer-item.active{background:rgba(255,255,255,.14);box-shadow:inset 3px 0 0 var(--brand)}
.drawer-item .th{width:40px;height:54px;flex:0 0 auto;border-radius:4px;background:#333;
  object-fit:cover;overflow:hidden}
.drawer-item .nm{font-size:13.5px;line-height:1.35}
.drawer-item .sb{font-size:11.5px;opacity:.6;margin-top:2px}
.drawer-home{display:block;padding:14px 16px;border-top:1px solid rgba(255,255,255,.1);
  color:#cbd5e1;text-decoration:none;font-size:13px}
.drawer-home:hover{color:#fff}
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:55}

/* ---------- loading ---------- */
.loading{position:absolute;inset:0;z-index:45;display:grid;place-items:center;gap:12px;
  grid-auto-flow:row;background:rgba(22,24,28,.82);color:#e5e7eb;font-size:13px}
.spinner{width:34px;height:34px;border:3px solid rgba(255,255,255,.22);border-top-color:#fff;
  border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){
  .spinner{animation-duration:2s}
  .leaf{transition-duration:.01s}
}