/* =========================================================================
   FULLDOT — Photo Treatment System
   Apply uniform brand look to ANY photograph (stock, real, or AI-generated).
   Use .photo--treated or [data-treat] on the <figure> or <img>.
   ========================================================================= */

/* ── Wrapper figure ─────────────────────────────────────────────────── */
.photo {
  display: block;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--ink);
  margin: 0;
  isolation: isolate;
}

.photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1200ms var(--ease-glide), filter var(--dur-base);
}

/* ── Treated variant — applies the brand look ──────────────────────── */
.photo--treated img,
[data-treat] img,
img[data-treat] {
  /* Bronze warmth + reduced saturation + lifted shadows = 甫東 mood */
  filter:
    contrast(1.05)
    saturate(0.78)
    sepia(0.06)
    brightness(1.02);
}

/* Stronger treatment — for hero / Ink-heavy backgrounds */
.photo--treated-deep img,
[data-treat="deep"] img {
  filter:
    contrast(1.10)
    saturate(0.62)
    sepia(0.12)
    brightness(0.95)
    hue-rotate(-4deg);
}

/* Subtle treatment — when image is already brand-aligned */
.photo--treated-soft img,
[data-treat="soft"] img {
  filter:
    contrast(1.03)
    saturate(0.88)
    brightness(1.02);
}

/* ── Overlay layers (applied via ::before / ::after) ────────────────── */

/* Bronze split-tone overlay — gives photos warm shadow + cool highlight */
.photo--treated::before,
[data-treat]::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(135deg,
      rgba(var(--copper-rgb), 0.08) 0%,
      transparent 50%,
      rgba(var(--teal-rgb), 0.06) 100%);
  mix-blend-mode: overlay;
}

/* Grain texture — adds analog film feel (cheap photos look expensive) */
.photo--treated::after,
[data-treat]::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: 0.08;
  mix-blend-mode: overlay;
}

/* Vignette — subtly dark corners, focus center */
.photo--vignette::before,
[data-treat="vignette"]::before {
  background:
    radial-gradient(ellipse 90% 90% at center, transparent 50%, rgba(var(--ink-rgb), 0.32) 100%),
    linear-gradient(135deg,
      rgba(var(--copper-rgb), 0.06) 0%,
      transparent 50%,
      rgba(var(--teal-rgb), 0.04) 100%);
  mix-blend-mode: multiply;
}

/* Caption — appears at bottom on hover, or static */
.photo__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 3;
  padding: var(--space-3) var(--space-4);
  color: var(--paper);
  background: linear-gradient(180deg, transparent 0%, rgba(var(--ink-rgb), 0.78) 100%);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.photo__cap-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--copper-bright);
  font-weight: 400;
}

/* Hover lift */
.photo:hover img { transform: scale(1.04); }

/* Aspect ratios */
.photo--square    { aspect-ratio: 1 / 1; }
.photo--portrait  { aspect-ratio: 4 / 5; }
.photo--landscape { aspect-ratio: 16 / 10; }
.photo--wide      { aspect-ratio: 21 / 9; }
.photo--cinema    { aspect-ratio: 2.35 / 1; }

/* Loading placeholder (when img has not loaded yet) */
.photo img[loading] {
  background: repeating-linear-gradient(45deg,
    transparent 0, transparent 24px,
    rgba(var(--copper-rgb), 0.04) 24px,
    rgba(var(--copper-rgb), 0.04) 48px);
}

/* Placeholder state when src fails (404) — graceful brand-aligned fallback */
.photo--placeholder {
  background:
    repeating-linear-gradient(45deg,
      transparent 0, transparent 28px,
      rgba(var(--copper-rgb), 0.06) 28px,
      rgba(var(--copper-rgb), 0.06) 56px),
    linear-gradient(135deg, var(--ink) 0%, var(--ink-glow) 60%, var(--ink) 100%);
}
.photo--placeholder img { display: none; }
.photo--placeholder::before {
  content: "📷  待上傳照片";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(var(--paper-rgb), 0.45);
  z-index: 4;
  background: none;
  mix-blend-mode: normal;
}

/* SVG placeholder variant (inline SVG inside .photo__svg-wrap) */
.photo--svg .photo__svg-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  transition: transform var(--dur-slow, 600ms) var(--ease-glide, ease);
}
.photo--svg .photo__svg-wrap svg {
  width: 100%;
  height: 100%;
  display: block;
}
.photo--svg:hover .photo__svg-wrap { transform: scale(1.03); }

/* Reduced motion: disable hover zoom */
@media (prefers-reduced-motion: reduce) {
  .photo:hover img { transform: none; }
  .photo img { transition: none; }
  .photo--svg:hover .photo__svg-wrap { transform: none; }
  .photo--svg .photo__svg-wrap { transition: none; }
}