/* ebook.css · หนังสือเมนูแบบพลิกหน้า (ebook.html) · ใช้เฉพาะตัวแปรสีจาก tokens.css */
.eb-sec{padding-top:28px}
.eb-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 18px;margin-bottom:6px}
.eb-head h1{font-size:34px;margin:0}
.eb-sub{margin:0 0 10px;color:var(--ink2)}
.eb{position:relative;display:flex;align-items:center;justify-content:center;min-height:200px;padding:6px 0 22px}
.eb-stage{position:relative;width:calc(var(--ebw)*2);height:var(--ebh);touch-action:pan-y;cursor:grab;user-select:none;-webkit-user-select:none}
.eb-stage.one{width:var(--ebw)}
.eb-stage.drag{cursor:grabbing}
.eb-book{position:absolute;inset:0}
.eb-leaf{position:absolute;top:0;left:50%;width:50%;height:100%;transform-origin:left center;transform-style:preserve-3d;perspective:2200px;perspective-origin:0 50%}
.one .eb-leaf{left:0;width:100%}
.eb-flat,.eb-strips{position:absolute;inset:0;transform-style:preserve-3d}
.eb-strips{display:none}
.eb-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden;background:var(--white)}
.eb-face.b{transform:rotateY(180deg)}
.eb-face img{width:100%;height:100%;display:block;pointer-events:none;-webkit-user-drag:none}
.eb-face i{position:absolute;inset:0;pointer-events:none;display:block}
.eb-face .sp{background:linear-gradient(to right,var(--c-000000-a35),transparent 11%);opacity:.45}
.eb-face.b .sp{background:linear-gradient(to left,var(--c-000000-a35),transparent 11%);opacity:.45}
.one .eb-face.f .sp{opacity:.2}
.eb-face .sh{opacity:0;background:linear-gradient(to right,var(--ink),transparent)}
.eb-face.b .sh{background:linear-gradient(to left,var(--ink),transparent)}
.eb-face .cs{opacity:0;background:linear-gradient(to right,var(--ink),transparent 60%)}
.eb-face.b .cs{background:linear-gradient(to left,var(--ink),transparent 60%)}
.eb-paper{background:var(--cream-3)}
.eb-st{position:absolute;top:0;left:0;height:100%;transform-origin:left center;transform-style:preserve-3d}
.eb-sf,.eb-sb{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden;background-repeat:no-repeat;background-size:var(--ebw) var(--ebh);background-color:var(--white)}
.eb-sb{transform:rotateY(180deg)}
.eb-sf i,.eb-sb i{position:absolute;inset:0;opacity:0;background:var(--ink);pointer-events:none}
.eb-ground{position:absolute;left:4%;right:4%;bottom:-16px;height:22px;background:radial-gradient(ellipse at 50% 0,var(--c-000000-a35),transparent 70%);filter:blur(3px);opacity:.55;pointer-events:none}
.eb-nav{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;border:2px solid var(--red);background:var(--white);color:var(--red);font-size:24px;font-weight:800;cursor:pointer;display:grid;place-items:center;z-index:5;box-shadow:var(--sh-card)}
.eb-nav:disabled{opacity:.3;cursor:default}
.eb-nav.l{left:0}.eb-nav.r{right:0}
.eb-nav:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.eb-foot{display:flex;flex-direction:column;align-items:center;gap:8px;margin:2px 0 18px}
.eb-pg{font-weight:800;color:var(--red-dark)}
.eb-dots{display:flex;gap:7px}
.eb-dots i{width:9px;height:9px;border-radius:50%;background:var(--line);transition:background .3s,transform .3s}
.eb-dots i.on{background:var(--red);transform:scale(1.35)}
.eb-hint{font-size:14px;color:var(--ink3);text-align:center}
@media (max-width:700px){.eb-head h1{font-size:26px}.eb-nav{width:42px;height:42px}}
@media (prefers-reduced-motion:reduce){.eb-dots i{transition:none}}