/* /book/flip.css */
/* Flipsnack-benzeri: masa/ambient sahne + kağıt dokusu + spine + page-edge + güçlü gölge */

:root{
  /* Global styles.css yoksa fallback */
  --border: var(--border, rgba(255,255,255,.12));
  --text: var(--text, #e9ecf5);
  --muted: var(--muted, rgba(233,236,245,.72));
  --primary: var(--primary, #7c5cff);

  /* Realism tokens */
  --rg-bg:#0b0f1a;
  --desk-1: rgba(124,92,255,.18);
  --desk-2: rgba(255,255,255,.08);
  --paper:#f7f2e8;
  --paper-ink:#1a1a1a;
  --paper-muted: rgba(0,0,0,.55);

  --shadow-strong: 0 30px 90px rgba(0,0,0,.55);
  --shadow-soft: 0 14px 40px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
body{
  /* sadece flip sayfasını “masa üstü” gibi yapıyoruz */
  margin:0;
  background:
    radial-gradient(1200px 700px at 18% 0%, var(--desk-1), transparent 60%),
    radial-gradient(1200px 700px at 82% 20%, var(--desk-2), transparent 60%),
    radial-gradient(900px 520px at 50% 55%, rgba(0,0,0,.45), transparent 60%),
    var(--rg-bg);
}

/* Topbar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 20, 0.74);
  backdrop-filter: blur(10px);
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:14px 0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  text-decoration:none;
  font-weight:900;
  letter-spacing:-0.02em;
}
.brand-logo{
  width:34px;
  height:34px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);
}

/* Actions */
.actions{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.iconbtn{
  width:40px; height:40px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  user-select:none;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.iconbtn:hover{ transform: translateY(-1px); border-color: rgba(255,255,255,.22); }
.iconbtn:active{ transform: translateY(1px); }

.counter{
  height:40px;
  padding:0 12px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.counter .sep{opacity:.6}

/* Wrap + “masa üstü” hissi */
.wrap{ padding: 22px 0 46px; }
.shell{
  /* eskiden sadece border/shadow vardı — şimdi “desk surface” gibi */
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.10);
  background:
    radial-gradient(900px 420px at 50% 35%, rgba(255,255,255,.06), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

/* Flipbook */
.flipbook{
  width:100%;
  max-width: 1040px;
  height: 660px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  border-radius: 18px;

  border: 1px solid rgba(255,255,255,.14);
  background:
    radial-gradient(120% 80% at 50% 30%, rgba(255,255,255,.10), transparent 55%),
    rgba(255,255,255,.03);

  box-shadow: var(--shadow-strong);
}

/* spine (kitap sırtı) */
.flipbook::before{
  content:"";
  position:absolute;
  top:0; bottom:0;
  left:50%;
  width: 20px;
  transform: translateX(-50%);
  background:
    linear-gradient(90deg,
      rgba(0,0,0,.22),
      rgba(255,255,255,.12),
      rgba(0,0,0,.22));
  opacity:.55;
  pointer-events:none;
  mix-blend-mode: multiply;
}

/* page-edge stack (sayfa kenarı) */
.flipbook::after{
  content:"";
  position:absolute;
  top: 18px;
  bottom: 18px;
  right: 10px;
  width: 22px;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(0,0,0,.06) 0px,
      rgba(0,0,0,.06) 2px,
      rgba(0,0,0,.02) 2px,
      rgba(0,0,0,.02) 6px
    );
  border-radius: 14px;
  opacity: .45;
  pointer-events:none;
  filter: blur(.2px);
}

/* Page base */
.page{
  width:100%;
  height:100%;
  color: var(--paper-ink);

  /* Kağıt dokusu (external asset yok) */
  background:
    radial-gradient(900px 520px at 30% 20%, rgba(255,255,255,.85), transparent 60%),
    radial-gradient(900px 520px at 70% 70%, rgba(0,0,0,.06), transparent 60%),
    repeating-linear-gradient(
      0deg,
      rgba(0,0,0,.015) 0px,
      rgba(0,0,0,.015) 1px,
      rgba(255,255,255,.0) 3px,
      rgba(255,255,255,.0) 6px
    ),
    var(--paper);
}

/* Cover pages */
.page--cover{
  background:
    radial-gradient(800px 520px at 50% 20%, rgba(255,255,255,.25), transparent 60%),
    linear-gradient(135deg, rgba(124,92,255,.28), rgba(243,230,255,.92));
}

/* Cover/back */
.cover, .back{
  height:100%;
  padding: 38px;
  display:grid;
  place-content:center;
  text-align:center;
  gap:12px;
}
.badge{
  justify-self:center;
  padding:6px 10px;
  border-radius:999px;
  background: rgba(124,92,255,.18);
  border: 1px solid rgba(124,92,255,.35);
  color:#2a1b57;
  font-weight:900;
}
.cover-title{ margin:0; font-size: 46px; letter-spacing:-0.03em; }
.cover-sub{ margin:0; color: rgba(0,0,0,.62); }
.cover-meta{ margin-top: 12px; display:grid; gap:6px; color: rgba(0,0,0,.72); }
.cover-meta span{ color: rgba(0,0,0,.48); margin-right:6px; }

/* Inner pages */
.p{ height:100%; padding: 30px; display:grid; grid-template-rows:auto 1fr; gap:18px; }
.p-head{ display:grid; gap:6px; }
.kicker{ font-size:12px; text-transform:uppercase; letter-spacing:.12em; color: var(--paper-muted); }
.title{ font-size:22px; font-weight:900; letter-spacing:-0.02em; }
.date{ font-size:13px; color: var(--paper-muted); }

.grid{ display:grid; grid-template-columns: .95fr 1.05fr; gap:18px; align-items:start; }
.grid.rev{ grid-template-columns: 1.05fr .95fr; }

.photo{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  border:1px solid rgba(0,0,0,.14);
  background:
    radial-gradient(500px 260px at 30% 20%, rgba(255,255,255,.45), transparent 60%),
    linear-gradient(135deg, rgba(0,0,0,.10), rgba(0,0,0,.02));
  min-height: 270px;
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
}
.photo img{ width:100%; height:100%; object-fit:cover; display:block; }

.text{ font-size:15px; line-height:1.72; }
.text p{ margin:0 0 12px; }
.text ul{ margin:10px 0 0; padding-left:18px; color: rgba(0,0,0,.75); }
.quote{
  margin-top:14px;
  padding:12px 14px;
  border-left:4px solid rgba(0,0,0,.18);
  background: rgba(0,0,0,.04);
  border-radius:10px;
}

.facts{ display:grid; grid-template-columns: repeat(3, 1fr); gap:10px; margin-top:12px; }
.fact{
  padding:10px 12px;
  border:1px solid rgba(0,0,0,.12);
  border-radius:12px;
  background: rgba(255,255,255,.65);
  font-size:13px;
  display:grid;
  gap:4px;
}
.fact span{ font-size:11px; color: rgba(0,0,0,.55); text-transform:uppercase; letter-spacing:.08em; }

.back-title{ font-size: 38px; font-weight: 950; letter-spacing:-0.03em; }
.back-text{ margin:0 auto; max-width:560px; color: rgba(0,0,0,.68); line-height:1.65; }
.back-cta{ margin-top:10px; }

.hint{ color: var(--muted); font-size: 13px; text-align:center; margin-top: 14px; }

/* Responsive */
@media (max-width: 980px){ .flipbook{ height: 610px; } }
@media (max-width: 900px){
  .flipbook{ height: 570px; }
  .grid, .grid.rev{ grid-template-columns: 1fr; }
  .p{ padding: 20px; }
}
@media (max-width: 520px){
  .flipbook{ height: 530px; }
  .cover-title{ font-size: 36px; }
}