/* ============ Okuma temaları ============
   --paper: kâğıt, --paper-edge: sayfa kenarı, --ink: yazı, --desk: kitabın durduğu masa */
.theme-beyaz {
  --paper: #fbfaf6; --paper-edge: #d9d3c6; --ink: #1d1a16; --ink-soft: #6f675c;
  --desk: radial-gradient(ellipse at 50% 35%, #ecebe7, #c9c5bd 75%, #b5b0a7);
  --ui-bg: #fbfaf6; --ui-ink: #1d1a16; --ui-line: rgba(0,0,0,.1);
  --noise-opacity: .35;
}
.theme-krem {
  --paper: #f6edda; --paper-edge: #d6c6a4; --ink: #2c2118; --ink-soft: #7d6a55;
  --desk:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(255, 196, 120, .16), transparent 70%),
    radial-gradient(ellipse at center, transparent 45%, rgba(0,0,0,.55) 100%),
    repeating-linear-gradient(93deg, rgba(0,0,0,.07) 0 2px, transparent 2px 11px, rgba(255,220,180,.025) 11px 13px, transparent 13px 29px),
    repeating-linear-gradient(88deg, rgba(0,0,0,.05) 0 1px, transparent 1px 47px),
    linear-gradient(180deg, #45301d, #2c1d11);
  --ui-bg: #2a1f17; --ui-ink: #f4eadc; --ui-line: rgba(255,235,210,.12);
  --noise-opacity: .5;
}
.theme-sepya {
  --paper: #ead6b2; --paper-edge: #c3a77c; --ink: #3c2a19; --ink-soft: #7f6446;
  --desk:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(255, 180, 100, .14), transparent 70%),
    radial-gradient(ellipse at center, transparent 45%, rgba(0,0,0,.6) 100%),
    repeating-linear-gradient(91deg, rgba(0,0,0,.08) 0 2px, transparent 2px 13px, rgba(255,210,160,.03) 13px 15px, transparent 15px 31px),
    linear-gradient(180deg, #3a2414, #24160b);
  --ui-bg: #26180e; --ui-ink: #f1e2c8; --ui-line: rgba(255,230,190,.12);
  --noise-opacity: .6;
}
.theme-yesil {
  --paper: #e1e9d6; --paper-edge: #b6c5a8; --ink: #1e2a1b; --ink-soft: #5d6e55;
  --desk:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(220, 255, 200, .08), transparent 70%),
    radial-gradient(ellipse at center, transparent 45%, rgba(0,0,0,.5) 100%),
    repeating-radial-gradient(circle at 30% 30%, rgba(255,255,255,.012) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, #2f4030, #1d291e);
  --ui-bg: #1f2a20; --ui-ink: #e6eedc; --ui-line: rgba(220,240,210,.12);
  --noise-opacity: .4;
}
.theme-gece {
  --paper: #25211c; --paper-edge: #3b342b; --ink: #d8cec0; --ink-soft: #8e8374;
  --desk:
    radial-gradient(ellipse 60% 50% at 50% 40%, rgba(255, 170, 90, .07), transparent 70%),
    linear-gradient(180deg, #100d0b, #080605);
  --ui-bg: #1b1713; --ui-ink: #e9dfd1; --ui-line: rgba(255,235,210,.1);
  --noise-opacity: .25;
}
.theme-siyah {
  --paper: #050505; --paper-edge: #1c1c1c; --ink: #b9b2a6; --ink-soft: #6f6a62;
  --desk: #000;
  --ui-bg: #0d0d0d; --ui-ink: #d6d0c6; --ui-line: rgba(255,255,255,.1);
  --noise-opacity: 0;
}

/* ============ Kâğıt ============ */
.page {
  background-color: var(--paper);
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .35  0 0 0 0 .27  0 0 0 0 .18  0 0 0 .09 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-blend-mode: multiply;
  overflow: hidden;
  isolation: isolate;
  transition: background-color .5s;
  user-select: none;
  -webkit-user-select: none;
}
.theme-gece .page, .theme-siyah .page { background-image: none; }
.page-content { position: absolute; inset: 0; }
.page-shade { position: absolute; inset: 0; z-index: 2; pointer-events: none; }

/* Cilt gölgesi: sol sayfada sağ kenar, sağ sayfada sol kenar koyulaşır */
.page.--left .page-shade {
  background:
    linear-gradient(to left, rgba(0,0,0,.26), rgba(0,0,0,.08) 2.5%, rgba(0,0,0,.02) 7%, transparent 12%),
    linear-gradient(to right, rgba(0,0,0,.08), transparent 1.5%);
}
.page.--right .page-shade {
  background:
    linear-gradient(to right, rgba(0,0,0,.24), rgba(0,0,0,.07) 2.5%, rgba(0,0,0,.02) 7%, transparent 12%),
    linear-gradient(to left, rgba(0,0,0,.08), transparent 1.5%);
}
.is-single .page.--right .page-shade, .is-single .page.--left .page-shade {
  background: linear-gradient(to right, rgba(0,0,0,.14), rgba(0,0,0,.03) 3%, transparent 8%), linear-gradient(to left, rgba(0,0,0,.06), transparent 1.5%);
}
.theme-gece .page-shade, .theme-siyah .page-shade { opacity: .9; mix-blend-mode: normal; }
.page.is-hard .page-shade { background: linear-gradient(to right, rgba(0,0,0,.3), rgba(255,255,255,.08) 2%, transparent 6%) !important; }
.page.is-hard.--left .page-shade { background: linear-gradient(to left, rgba(0,0,0,.3), rgba(255,255,255,.08) 2%, transparent 6%) !important; }

/* PDF: beyaz sayfa kâğıt rengine "basılır" */
.pdf-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  mix-blend-mode: multiply;
  opacity: 0;
  transition: opacity .35s ease, filter .5s;
}
.pdf-canvas.in { opacity: 1; }
/* Gece: sayfa ters çevrilir; siyah zemin "screen" ile kâğıt rengine karışır, yazı hafif kısılır */
.theme-gece .pdf-canvas { filter: invert(1) hue-rotate(180deg) brightness(.84); mix-blend-mode: screen; }
.theme-siyah .pdf-canvas { filter: invert(1) hue-rotate(180deg) brightness(.72); mix-blend-mode: screen; }
.page.is-cover .pdf-canvas { filter: none; mix-blend-mode: normal; }

/* Yüklenmemiş sayfada silik çizgiler (metin hissi) */
.page-content:empty::before {
  content: ''; position: absolute; inset: 11% 12% 12%;
  background: repeating-linear-gradient(180deg, color-mix(in srgb, var(--ink) 7%, transparent) 0 6px, transparent 6px 22px);
  -webkit-mask: linear-gradient(90deg, #000 70%, transparent);
          mask: linear-gradient(90deg, #000 70%, transparent);
  animation: ghost 1.6s ease-in-out infinite alternate;
}
.page.is-hard .page-content:empty::before { display: none; }
@keyframes ghost { from { opacity: .35; } to { opacity: .8; } }

/* ============ EPUB tipografisi ============ */
.ep-page { position: absolute; inset: 0; color: var(--ink); }
/* Kenarlarda 6px pay: italik harflerin taşan uçları kırpılmasın (sütun arası boşluk bundan geniş) */
.ep-box { position: relative; box-sizing: content-box; width: var(--cw); height: var(--ch); padding: 0 6px; margin: 0 -6px; overflow: hidden; }
.ep-flow, .ep-measure .ep-flow {
  width: var(--cw); height: var(--ch);
  column-width: var(--cw); column-gap: var(--gap); column-fill: auto;
  font-family: var(--ep-font, var(--font-read));
  font-size: var(--ep-size, 19px);
  line-height: var(--ep-lh, 1.6);
  text-align: var(--ep-align, justify);
  text-wrap: pretty;
  hyphens: auto; -webkit-hyphens: auto;
  font-variant-ligatures: common-ligatures;
  font-optical-sizing: auto;
  overflow-wrap: break-word;
  color: var(--ink);
}
.ep-measure { position: absolute; left: -30000px; top: 0; visibility: hidden; pointer-events: none; }
.ep-measure .ep-flow { overflow: hidden; }
.ep-flow p { margin: 0; text-indent: 1.5em; orphans: 2; widows: 2; }
.ep-flow h1 + p, .ep-flow h2 + p, .ep-flow h3 + p, .ep-flow h4 + p, .ep-flow hr + p, .ep-flow p:first-child { text-indent: 0; }
.ep-flow h1, .ep-flow h2, .ep-flow h3, .ep-flow h4 {
  font-family: var(--font-display); font-weight: 600; text-align: center; line-height: 1.2;
  margin: 1.2em 0 .9em; text-indent: 0; break-after: avoid; hyphens: manual;
}
.ep-flow h1 { font-size: 1.6em; margin-top: 2.2em; }
.ep-flow h2 { font-size: 1.35em; margin-top: 1.8em; }
.ep-flow h3 { font-size: 1.15em; }
.ep-flow img, .ep-flow svg {
  display: block; max-width: 100%; max-height: calc(var(--ch) - 1em); height: auto;
  margin: .6em auto; object-fit: contain; break-inside: avoid;
}
.ep-flow figure { margin: 1em 0; break-inside: avoid; text-align: center; }
.ep-flow blockquote { margin: 1em 1.2em; font-style: italic; }
.ep-flow hr { border: 0; text-align: center; margin: 1.4em 0; height: 1em; }
.ep-flow hr::after { content: '⁂'; color: var(--ink-soft); }
.ep-flow a { color: inherit; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--ink) 35%, transparent); text-underline-offset: 2px; }
.ep-flow sup a { text-decoration: none; color: var(--ink-soft); }
.ep-flow .ep-center { text-align: center; text-indent: 0; }
.ep-flow .ep-right { text-align: right; text-indent: 0; }
.ep-flow table { border-collapse: collapse; font-size: .85em; margin: 1em auto; break-inside: avoid; }
.ep-flow td, .ep-flow th { border: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); padding: .3em .5em; }
.ep-flow ul, .ep-flow ol { padding-left: 1.4em; }
.ep-flow pre, .ep-flow code { font-size: .85em; white-space: pre-wrap; }

.ep-running, .ep-folio {
  position: absolute; left: 0; right: 0; text-align: center;
  font-family: var(--font-read); color: var(--ink-soft);
  font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 0 18%;
}
.ep-folio { font-size: 13px; letter-spacing: .04em; text-transform: none; }
.ep-cover { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ep-titlepage, .ep-end {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; padding: 15%; text-align: center; color: var(--ink);
}
.ep-titlepage { background: linear-gradient(160deg, #6b3f26, #3b2214); color: #f3e1c4; }
.ep-titlepage h1 { font-size: 30px; }
.ep-end { font-family: var(--font-display); }
.ep-end p { font-size: 26px; font-style: italic; }
.ep-end small { font-family: var(--font-ui); color: var(--ink-soft); }
.ep-orn { font-size: 34px; color: var(--ink-soft); }