/* ZEYİST — ortak stil
   Marka: gece mürekkebi zemin, pirinç yaldız vurgu, kâğıt tonu iç sayfalar.
   Her kitap sayfası kendi renklerini <body> üzerindeki değişkenlerle tanımlar. */
:root{
  --ink:#0d0d10;
  --ink2:#15151a;
  --paper:#efe8da;
  --paper-ink:#2a2620;
  --brass:#c9a464;
  --brass-hi:#e8cf98;
  --text:#f1ece2;
  --muted:#9d978c;
  --line:rgba(255,255,255,.12);
  --card:rgba(255,255,255,.05);
  --ok:#8fc29a;
  --display:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --turn:#efe8da;
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--ink)}
body{background:var(--ink);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.55;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:4px}
[hidden]{display:none!important}
h1,h2,h3{font-family:var(--display);font-weight:400;text-wrap:balance;letter-spacing:-.02em}
.wrap{padding-inline:max(16px,6vw)}
.eyebrow{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--brass)}

/* ---------- Navigasyon ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:40;
  padding:calc(18px + env(safe-area-inset-top,0px)) max(16px,5vw) 18px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:linear-gradient(to bottom,rgba(0,0,0,.55),transparent);
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-size:22px;letter-spacing:.14em}
.brand .mono{
  width:34px;height:34px;border-radius:50%;border:1px solid currentColor;display:grid;place-items:center;
  font-size:16px;letter-spacing:0;font-style:italic
}
.nav .links{display:flex;gap:28px;font-size:13px;opacity:.85}
.nav .links a:hover{opacity:1;text-decoration:underline;text-underline-offset:6px}
.cart-link{display:inline-flex;align-items:center;gap:9px;font-size:13px;padding:9px 15px;border:1px solid currentColor;border-radius:999px;transition:.3s}
.cart-link:hover{background:var(--text);color:var(--bg,var(--ink));border-color:var(--text)}
.cart-count{min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--brass);color:#16110a;font-size:11px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}

/* ---------- Butonlar ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:15px 24px;cursor:pointer;
  border:1px solid currentColor;border-radius:999px;font-size:14px;background:transparent;transition:.3s;white-space:nowrap
}
.btn:hover{transform:translateY(-2px)}
.btn.solid{background:var(--accent,var(--brass));border-color:var(--accent,var(--brass));color:var(--on-accent,#16110a);font-weight:600}
.btn.solid:hover{filter:brightness(1.08)}
.btn.added{background:var(--ok);border-color:var(--ok);color:#0d1a10}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Sayfa çevirme geçişi ---------- */
.turn{position:fixed;inset:0;z-index:100;pointer-events:none;perspective:2200px}
.turn i{
  position:absolute;inset:0;background:var(--turn);transform-origin:left center;
  box-shadow:inset -60px 0 90px rgba(0,0,0,.18),inset 6px 0 0 rgba(0,0,0,.08);
  animation:turnAway 1s cubic-bezier(.65,.05,.3,1) .05s both;backface-visibility:hidden
}
.turn i:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.12),transparent 12%,transparent 85%,rgba(0,0,0,.1))}
.leaving .turn i{transform-origin:right center;animation:turnIn .7s cubic-bezier(.65,.05,.3,1) both}
@keyframes turnAway{from{transform:rotateY(0)}to{transform:rotateY(-98deg);visibility:hidden}}
@keyframes turnIn{from{transform:rotateY(98deg)}to{transform:rotateY(0)}}

/* ---------- 3B kitap ---------- */
.book3d{--w:280px;--h:420px;--t:34px;--spine:#333;--edge:#e9e2d2;width:var(--w);height:var(--h);position:relative;transform-style:preserve-3d;transform:rotateY(-28deg) rotateX(6deg);transition:transform .25s ease-out}
.book3d > *{position:absolute;backface-visibility:hidden}
.book3d .f{inset:0;transform:translateZ(calc(var(--t)/2));border-radius:2px 4px 4px 2px;overflow:hidden}
.book3d .f img{width:100%;height:100%;object-fit:cover}
.book3d .f:after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(0,0,0,.25),transparent 6%,rgba(255,255,255,.12) 9%,transparent 22%,transparent 75%,rgba(0,0,0,.18))}
.book3d .b{inset:0;background:var(--spine);transform:rotateY(180deg) translateZ(calc(var(--t)/2));border-radius:4px 2px 2px 4px}
.book3d .s{top:0;height:100%;width:var(--t);left:calc(50% - var(--t)/2);background:var(--spine);transform:rotateY(-90deg) translateZ(calc(var(--w)/2))}
.book3d .p{top:3px;height:calc(100% - 6px);width:calc(var(--t) - 4px);left:calc(50% - var(--t)/2 + 2px);transform:rotateY(90deg) translateZ(calc(var(--w)/2 - 3px));background:repeating-linear-gradient(90deg,var(--edge) 0 2px,#cfc6b2 2px 3px)}
.book3d .tp{left:3px;width:calc(100% - 6px);height:calc(var(--t) - 4px);top:calc(50% - var(--t)/2 + 2px);transform:rotateX(90deg) translateZ(calc(var(--h)/2 - 3px));background:repeating-linear-gradient(0deg,var(--edge) 0 2px,#cfc6b2 2px 3px)}
.book3d .s span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;font-family:var(--display);font-size:13px;letter-spacing:.2em;color:var(--spine-ink,#fff)}
.book-stage{perspective:1600px;display:grid;place-items:center}
.book-shadow{position:absolute;bottom:-40px;left:10%;right:10%;height:50px;border-radius:50%;background:radial-gradient(closest-side,rgba(0,0,0,.55),transparent);filter:blur(6px)}
.spin-in{animation:spinIn 1.6s cubic-bezier(.2,.8,.2,1) .45s both}
@keyframes spinIn{from{transform:rotateY(-200deg) rotateX(14deg) translateY(30px);opacity:0}to{opacity:1}}

/* ---------- Ortak bölümler ---------- */
.sec{padding-block:120px}
.sec-head{display:grid;gap:14px;margin-bottom:50px}
.sec-head h2{font-size:clamp(36px,5.4vw,68px);line-height:1}
.prose{max-width:66ch}
.prose p{font-size:17px;line-height:1.85;margin-bottom:20px;opacity:.86}
.specs{display:grid;grid-template-columns:auto 1fr;gap:14px 34px;font-size:14px;max-width:560px}
.specs dt{font-size:11px;letter-spacing:.18em;text-transform:uppercase;opacity:.6;padding-top:2px}
.specs dd{font-variant-numeric:tabular-nums}
.todo{color:var(--brass);font-size:12px;border:1px dashed currentColor;padding:2px 8px;border-radius:6px;user-select:none}

/* Satın al bandı */
.buyband{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding-block:44px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.buyband .t{font-family:var(--display);font-size:clamp(26px,3vw,38px)}
.buyband .pr{font-family:var(--display);font-size:clamp(26px,3vw,38px);font-variant-numeric:tabular-nums}
.next-book{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:60px;font-family:var(--display);font-size:clamp(24px,3.2vw,44px)}
.next-book small{display:block;font-family:var(--sans);font-size:11px;letter-spacing:.25em;text-transform:uppercase;opacity:.6;margin-bottom:10px}
.next-book .arrow{font-size:.9em;transition:transform .3s}
.next-book:hover .arrow{transform:translateX(10px)}

footer{
  padding:40px max(16px,5vw) calc(40px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px 30px;justify-content:space-between;font-size:12px;opacity:.75
}
footer .flinks{display:flex;flex-wrap:wrap;gap:18px}
footer a:hover{text-decoration:underline}

/* ---------- Sepet / ödeme ---------- */
.checkout{padding-top:150px;padding-bottom:100px}
.checkout h1{font-size:clamp(44px,6vw,80px);margin-top:12px}
.checkout-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:36px;align-items:start;margin-top:46px}
.panel{border:1px solid var(--line);border-radius:22px;background:var(--card);padding:30px;min-width:0}
.panel h3{font-size:26px;margin-bottom:20px}
.line-item{display:grid;grid-template-columns:70px minmax(0,1fr) auto;gap:20px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}
.line-item:first-of-type{padding-top:0}
.line-item img{width:70px;border-radius:3px;box-shadow:6px 10px 20px rgba(0,0,0,.5)}
.line-item .t{font-family:var(--display);font-size:20px}
.line-item .a{color:var(--muted);font-size:13px;margin-top:2px}
.line-item .r{text-align:right;font-variant-numeric:tabular-nums}
.qty{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;margin-top:10px}
.qty button{background:none;border:0;width:32px;height:30px;font-size:16px;cursor:pointer;border-radius:999px}
.qty button:hover{background:rgba(255,255,255,.08)}
.qty span{min-width:26px;text-align:center;font-variant-numeric:tabular-nums;font-size:14px}
.remove{background:none;border:0;color:var(--muted);font-size:12px;cursor:pointer;margin-top:8px;text-decoration:underline}
.empty{color:var(--muted);padding:10px 0 20px;line-height:1.7}
.totals{display:grid;gap:12px;margin-top:22px;font-size:14px}
.totals div{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.totals .grand{color:var(--text);font-size:22px;font-family:var(--display);border-top:1px solid var(--line);padding-top:16px;margin-top:4px}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:grid;gap:7px;margin-bottom:14px;min-width:0}
.field label{font-size:12px;color:var(--muted);letter-spacing:.06em}
.field input,.field textarea{width:100%;background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:12px;color:var(--text);font:inherit;font-size:15px;padding:12px 14px}
.field textarea{min-height:90px;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brass)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);line-height:1.6;margin:8px 0 16px}
.check input{margin-top:4px;accent-color:var(--brass)}
.check a{color:var(--text);border-bottom:1px solid var(--brass)}
.payment-slot{margin-top:22px;border:1px dashed rgba(201,164,100,.6);border-radius:18px;padding:26px;text-align:center;background:repeating-linear-gradient(135deg,transparent 0 14px,rgba(201,164,100,.04) 14px 28px)}
.payment-slot strong{display:block;font-family:var(--display);font-size:20px;font-weight:400;margin-bottom:8px}
.payment-slot p{color:var(--muted);font-size:13px;line-height:1.7}
.notice{margin-top:16px;padding:14px 16px;border-radius:12px;background:rgba(201,164,100,.12);color:var(--brass-hi);font-size:13px;line-height:1.6}
.secure{text-align:center;color:var(--muted);font-size:12px;margin-top:14px}

/* Yasal */
.legal{padding-top:150px;padding-bottom:100px;max-width:900px}
.legal h1{font-size:clamp(40px,6vw,72px);margin:12px 0 26px}
.legal h2{font-size:clamp(26px,3.2vw,38px);margin:56px 0 16px}
.legal p,.legal li{color:#bdb6aa;line-height:1.85;font-size:15.5px}
.legal ul{padding-left:20px;display:grid;gap:6px}

/* Bildirim */
.toast{
  position:fixed;left:50%;bottom:calc(26px + env(safe-area-inset-bottom,0px));transform:translate(-50%,30px);opacity:0;z-index:60;
  background:var(--text);color:#111;padding:13px 20px;border-radius:999px;font-size:13px;transition:.35s;pointer-events:none;
  display:flex;gap:14px;align-items:center;box-shadow:0 20px 40px rgba(0,0,0,.4);max-width:calc(100% - 32px)
}
.toast.show{opacity:1;transform:translate(-50%,0);pointer-events:auto}
.toast a{font-weight:700;border-bottom:1px solid #111;white-space:nowrap}

@media (prefers-reduced-motion:reduce){
  *,*:before,*:after{animation-duration:.01ms!important;animation-delay:0s!important;transition:none!important}
  html{scroll-behavior:auto}
}
/* Mobil menü */
.menu-btn{display:none;width:42px;height:42px;border-radius:50%;border:1px solid currentColor;background:transparent;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;position:relative;z-index:2}
.menu-btn span{display:block;width:16px;height:1.5px;background:currentColor;transition:transform .3s}
.menu-open .menu-btn span:first-child{transform:translateY(3.25px) rotate(45deg)}
.menu-open .menu-btn span:last-child{transform:translateY(-3.25px) rotate(-45deg)}
@media(max-width:900px){
  .nav .links{display:none}
  .menu-btn{display:flex;order:3}
  .nav{gap:10px}
  .cart-link{margin-left:auto;position:relative;z-index:2}
  .brand{position:relative;z-index:2}
  .menu-open .nav .links{
    display:flex;flex-direction:column;justify-content:center;gap:6px;position:fixed;inset:0;z-index:1;opacity:1;
    padding:calc(90px + env(safe-area-inset-top,0px)) max(24px,8vw) calc(40px + env(safe-area-inset-bottom,0px));
    background:var(--bg,var(--ink));font-family:var(--display);font-size:clamp(28px,8vw,40px);animation:menuIn .35s ease both
  }
  .menu-open .nav .links a{padding:10px 0;border-bottom:1px solid var(--line);text-decoration:none}
  .menu-open{overflow:hidden}
}
@keyframes menuIn{from{opacity:0;transform:translateY(-12px)}}
  .checkout-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .sec{padding-block:80px}
  .book3d{--w:200px;--h:300px;--t:26px}
  form .row{grid-template-columns:1fr}
  .panel{padding:22px}
  .line-item{grid-template-columns:56px minmax(0,1fr)}
  .line-item img{width:56px}
  .line-item .r{grid-column:2;text-align:left}
  .specs{grid-template-columns:1fr;gap:4px 0}
  .specs dd{margin-bottom:12px}
  .brand{font-size:18px}
}

/* ---------- Basılı / e-kitap seçimi ---------- */
.formats{margin-top:30px;max-width:520px}
.formats .buy{margin-top:18px}
.fmt-tabs{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fmt-tabs button{
  display:grid;gap:2px;text-align:left;padding:14px 18px;border-radius:16px;cursor:pointer;
  background:transparent;border:1px solid var(--line);transition:.25s
}
.fmt-tabs button b{font-weight:600;font-size:14px}
.fmt-tabs button span{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.fmt-tabs button:hover{border-color:var(--accent,var(--brass))}
.fmt-tabs button[aria-checked="true"]{border-color:var(--accent,var(--brass));box-shadow:inset 0 0 0 1px var(--accent,var(--brass));background:var(--card)}
.fmt-langs{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.fmt-langs[hidden]{display:none}
.fmt-langs button{padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:transparent;cursor:pointer;font-size:13px}
.fmt-langs button[aria-checked="true"]{background:var(--accent,var(--brass));border-color:var(--accent,var(--brass));color:var(--on-accent,#16110a);font-weight:600}
.fmt-note{margin-top:12px;font-size:13px;color:var(--muted)}