/* ════════════════════════════════════════════════════════════════
   SOLGUN KİTABE — HAREKETLER
   Sayfa çevirme, ambient sürüklenme, mikro-etkileşimler.
   Tüm sonsuz animasyonlar [data-perf="rich"] içinde tutulur.
   ════════════════════════════════════════════════════════════════ */

/* ───── SAYFA ÇEVİRME — 3B (rich) ───── */

.page--turning {
    z-index: 60;
    will-change: transform;
}
[data-perf="rich"] .page--right.page--turning {
    transition: transform var(--d-page) var(--ease-page);
    transform-origin: left center;
}
[data-perf="rich"] .page--left.page--turning {
    transition: transform var(--d-page) var(--ease-page);
    transform-origin: right center;
}
[data-perf="rich"] .page--right.page--turning.page--turn-forward {
    transform: rotateY(-180deg);
}
[data-perf="rich"] .page--left.page--turning.page--turn-backward {
    transform: rotateY(180deg);
}

/* ───── SAYFA ÇEVİRME — opaklık çapraz geçişi (lite) ───── */

[data-perf="lite"] .page--turning {
    transition: opacity calc(var(--d-page) * 0.45) var(--ease-veil),
                transform calc(var(--d-page) * 0.45) var(--ease-veil);
    will-change: opacity, transform;
}
[data-perf="lite"] .page--turning.page--turn-forward {
    opacity: 0;
    transform: translate3d(-12px, 0, 0);
}
[data-perf="lite"] .page--turning.page--turn-backward {
    opacity: 0;
    transform: translate3d(12px, 0, 0);
}

/* ───── KIVRIM GÖLGESİ (rich) ───── */

.page__curl {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, transparent 0%, rgba(0,0,0,0.14) 50%, rgba(0,0,0,0.32) 100%);
    opacity: 0;
    pointer-events: none;
    transition: opacity calc(var(--d-page) * 0.5) var(--ease-soft);
    z-index: 4;
}
[data-perf="rich"] .page--turning .page__curl { opacity: 1; }
[data-perf="lite"] .page__curl { display: none; }

/* Sabitlenmiş sayfa katmanları */
.page--current { z-index: 10; }
.page--reveal  { z-index: 1; }

/* ───── GİRİŞ ANİMASYONLARI ───── */

@keyframes page-rise {
    from { opacity: 0; transform: translate3d(0, 12px, 0); }
    to   { opacity: 1; transform: translate3d(0, 0, 0); }
}
.book.is-ready .page--current {
    animation: page-rise 0.84s var(--ease-veil) backwards;
}

@keyframes book-open {
    0%   { transform: scale(0.85); opacity: 0; }
    100% { transform: scale(1);    opacity: 1; }
}
body:not(.is-loading) .book {
    animation: book-open 1.05s var(--ease-veil) both;
}

@keyframes text-fade-in {
    from { opacity: 0; transform: translate3d(0, 4px, 0); }
    to   { opacity: 1; transform: translate3d(0, 0, 0); }
}
.page--current .page__content {
    animation: text-fade-in 0.48s var(--ease-veil) 0.12s both;
}

/* ───── KAPI GİRİŞLERİ ───── */

.drawer[aria-hidden="false"] .drawer__entry {
    animation: drawer-entry-rise 0.42s var(--ease-veil) backwards;
}
@keyframes drawer-entry-rise {
    from { opacity: 0; transform: translate3d(-8px, 0, 0); }
    to   { opacity: 1; transform: translate3d(0, 0, 0); }
}
.drawer[aria-hidden="false"] .drawer__entry:nth-child(1) { animation-delay: 0.04s; }
.drawer[aria-hidden="false"] .drawer__entry:nth-child(2) { animation-delay: 0.07s; }
.drawer[aria-hidden="false"] .drawer__entry:nth-child(3) { animation-delay: 0.10s; }
.drawer[aria-hidden="false"] .drawer__entry:nth-child(4) { animation-delay: 0.13s; }
.drawer[aria-hidden="false"] .drawer__entry:nth-child(5) { animation-delay: 0.16s; }
.drawer[aria-hidden="false"] .drawer__entry:nth-child(n+6) { animation-delay: 0.18s; }

/* ───── SONSUZ AMBIENT DÖNGÜLER (rich) ───── */

@keyframes nebula-drift {
    0%   { transform: translate3d(0, 0, 0); }
    50%  { transform: translate3d(2%, -1%, 0); }
    100% { transform: translate3d(0, 0, 0); }
}
[data-perf="rich"] .ambient__nebula {
    animation: nebula-drift 110s ease-in-out infinite;
}

@keyframes dust-drift {
    0%   { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(-40px, 60px, 0); }
}
[data-perf="rich"] .ambient__dust {
    animation: dust-drift 130s linear infinite alternate;
}

/* Sekme gizliyken duraklat */
.is-doc-hidden .ambient__nebula,
.is-doc-hidden .ambient__dust,
.is-doc-hidden .loader__sigil {
    animation-play-state: paused !important;
}

/* ───── MÜHÜR-AÇILIŞ DEVİNİMİ ───── */

@keyframes sigil-rotate { to { transform: rotate(360deg); } }
@keyframes sigil-pulse {
    0%, 100% { opacity: 0.85; }
    50%      { opacity: 1; }
}
@keyframes sigil-rune-pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
}
@keyframes text-flicker {
    0%, 100% { opacity: 0.55; }
    50%      { opacity: 0.95; }
}

/* ───── KAPAK PARILTISI (rich) ───── */

@keyframes cover-glow {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.045); }
}
[data-perf="rich"] .cover__crest {
    animation: cover-glow 7s ease-in-out infinite;
}

/* ───── İLLÜMİNE HARF PARILTISI (rich) ───── */

@keyframes illuminated-glow {
    0%, 100% { text-shadow: 0 0 0 rgba(106, 24, 24, 0); }
    50%      { text-shadow: 0 0 20px rgba(106, 24, 24, 0.28); }
}
[data-perf="rich"] .story-body p:first-child::first-letter {
    animation: illuminated-glow 5.5s ease-in-out infinite;
}

/* ───── İNDİRGENMİŞ HAREKET ───── */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}