/* ============================================================
   animations.css — 顯影進場 / keyframes / 作品 overlay
   所有動畫尊重 prefers-reduced-motion
   ============================================================ */

/* ---- 鏡頭對焦慢速顯影 (Scroll-Driven Lens Focus, SPEC §2.4) ---- */
.reveal {
  opacity: 0;
  filter: blur(25px) grayscale(100%);
  transform: translateY(22px);
  transition:
    opacity 1.6s var(--ease-shutter),
    filter 1.9s var(--ease-shutter),
    transform 1.6s var(--ease-shutter);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, filter, transform;
}
.reveal.is-in { opacity: 1; filter: blur(0) grayscale(100%); transform: none; }

/* ---- keyframes ---- */
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

@keyframes scrollBlink {
  0% { opacity: 0.35; }
  100% { opacity: 1; }
}

@keyframes trickle {
  0%   { top: -50%; }
  60%  { top: 100%; }
  100% { top: 100%; }
}

@keyframes expose {
  from { opacity: 0; filter: blur(6px) brightness(1.4); }
  to   { opacity: 1; filter: blur(0) brightness(1); }
}

/* 首屏載入曝光 — hero 緩慢顯影 */
.hero__media .photo { animation: heroExpose var(--dur-slow) var(--ease-shutter) both; }
@keyframes heroExpose {
  from { opacity: 0; filter: url(#leica-splash) contrast(1.4) brightness(0.4); transform: scale(1.12); }
  to   { opacity: 1; filter: url(#leica-splash) contrast(1.25) brightness(0.78); transform: scale(1.06); }
}

@keyframes heroBreathe {
  0% {
    opacity: 0.22;
    transform: scale(0.97) rotate(0deg);
  }
  50% {
    opacity: 0.75;
    transform: scale(1.04) rotate(0.4deg);
  }
  100% {
    opacity: 0.38;
    transform: scale(1.01) rotate(-0.4deg);
  }
}

@keyframes seamBreathe {
  0% {
    opacity: 0.25;
    transform: scale(0.98) translate(-1px, 1px);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05) translate(1px, -1px);
  }
  100% {
    opacity: 0.4;
    transform: scale(1.0) translate(0, 0);
  }
}


/* hero 文字逐行進場 */
.hero__title, .hero__creed, .hero__sub, .hero__scroll {
  opacity: 0; filter: blur(5px); transform: translateY(20px);
  animation: expose var(--dur-slow) var(--ease-shutter) both;
}
.hero__title { animation-delay: 300ms; }
.hero__creed { animation-delay: 600ms; }
.hero__sub   { animation-delay: 880ms; }
.hero__scroll{ animation-delay: 1100ms; }

/* ===================== WORK OVERLAY ===================== */
.work-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: var(--bg);
  transform: translateY(100%);           /* 從下往上 */
  transition: transform var(--dur-slow) var(--ease-shutter);
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  overflow: hidden;
  visibility: hidden;
}
.work-overlay.is-open { transform: translateY(0); visibility: visible; }

.work-overlay__media {
  position: relative; background: #000; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.work-overlay__media .photo { position: absolute; inset: 0; filter: grayscale(100%) contrast(1.15) brightness(0.95); opacity: 0; transition: opacity var(--dur-normal) var(--ease-shutter); }
.work-overlay__media .photo.is-active { opacity: 1; }
.work-overlay__media:hover .photo.is-active { filter: grayscale(0%) contrast(1.02); }

.ov-count {
  position: absolute; left: 1.6rem; bottom: 1.4rem; z-index: 3;
  font-family: var(--font-body); font-weight: 300; font-size: var(--text-caption);
  color: var(--ink-dim); letter-spacing: var(--tracking-wide);
}
.ov-count b { color: var(--ink); font-weight: 400; }
.ov-nav {
  position: absolute; bottom: 1.2rem; right: 1.4rem; z-index: 3;
  display: flex; gap: 0.6rem;
}
.ov-nav button {
  width: 40px; height: 40px; background: rgba(17,17,17,0.6);
  border: 1px solid var(--line); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.ov-nav button:hover { border-color: var(--warm); }
.ov-nav button svg { width: 14px; height: 14px; stroke: var(--ink); fill: none; stroke-width: 1.2; }

.work-overlay__panel {
  padding: clamp(3rem, 6vw, 6rem) clamp(2rem, 4vw, 4rem);
  display: flex; flex-direction: column; justify-content: center;
  gap: 1.6rem; position: relative;
  border-left: 1px solid var(--line);
}
.work-overlay__panel .ov-index { font-family: var(--font-body); font-size: var(--text-caption); color: var(--ink-dim); letter-spacing: var(--tracking-wide); }
.work-overlay__panel .ov-title { font-family: var(--font-display); font-weight: 700; font-size: var(--text-title); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--ink); line-height: 1.05; }
.work-overlay__panel .ov-line { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.work-overlay__panel .ov-line span { font-family: var(--font-body); font-weight: 300; font-size: var(--text-caption); color: var(--ink-dim); }
.work-overlay__panel .ov-desc { font-family: var(--font-body); font-weight: 300; font-size: var(--text-body); color: var(--ink); line-height: var(--leading-loose); max-width: 42ch; }
.work-overlay__panel .ov-related { margin-top: 0.6rem; }
.work-overlay__panel .ov-related a { font-family: var(--font-body); font-size: var(--text-caption); color: var(--warm); letter-spacing: var(--tracking-body); }
.work-overlay__panel .ov-related a::before { content: "— "; color: var(--ink-dim); }

/* 關閉 × (SVG) */
.ov-close {
  position: absolute; top: 1.6rem; right: 1.6rem; z-index: 4;
  width: 44px; height: 44px; background: none; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.ov-close svg { width: 22px; height: 22px; stroke: var(--ink); stroke-width: 1.2; transition: stroke var(--dur-fast), transform var(--dur-fast) var(--ease-shutter); }
.ov-close:hover svg { stroke: var(--warm); transform: rotate(90deg); }

@media (max-width: 768px) {
  .work-overlay { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .work-overlay__media { min-height: 45vh; }
  .work-overlay__panel { border-left: none; border-top: 1px solid var(--line); justify-content: flex-start; gap: 1rem; }
}

/* ---- reduced motion: 關閉所有動效 ---- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; filter: none !important; transform: none !important; transition: none; }
  .hero__media .photo, .hero__title, .hero__creed, .hero__sub, .hero__scroll, .hero__glow, .seam__glow { animation: none !important; opacity: 1 !important; filter: none !important; transform: none !important; }
  .hero__media .photo { filter: url(#leica-splash) contrast(1.35) brightness(0.85) !important; transform: scale(1.06) !important; }
  .hero__glow { opacity: 0.35 !important; background: radial-gradient(circle at 50% 45%, rgba(196, 112, 42, 0.26) 0%, transparent 60%) !important; }
  .seam__glow { opacity: 0.38 !important; background: radial-gradient(circle at 45% 50%, rgba(196, 112, 42, 0.28) 0%, transparent 60%) !important; }
  .work-overlay { transition: none; }
  * { scroll-behavior: auto !important; }
}