/* Image Viewer App - Elegant Image Gallery */
/* Dark background for optimal image viewing */

:host {
  position: fixed;
  inset: 0;
  z-index: 950;
  display: flex;
  flex-direction: column;
  background: oklch(0.12 0.01 0);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.95);
  transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.4s ease;
  dynamic-range-limit: no-limit;
}

:host([open]) {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid oklch(1 0 0 / 0.08);
  flex-shrink: 0;
  background: oklch(0.1 0 0 / 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Title */
.title {
  font-family: var(--font-body, 'Cormorant Garamond', serif);
  font-style: italic;
  font-size: 1rem;
  font-weight: 400;
  color: oklch(1 0 0 / 0.9);
  letter-spacing: 0.04em;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-info {
  font-family: var(--font-body, 'Cormorant Garamond', serif);
  font-size: 0.75rem;
  color: oklch(1 0 0 / 0.5);
  letter-spacing: 0.06em;
}

.counter {
  font-family: var(--font-body, 'Cormorant Garamond', serif);
  font-size: 0.8rem;
  font-style: italic;
  color: oklch(1 0 0 / 0.5);
  letter-spacing: 0.06em;
}

/* Buttons */
.close-btn,
.nav-btn,
.zoom-btn {
  background: transparent;
  border: 1px solid oklch(1 0 0 / 0.2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.15s ease;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
}

.close-btn:hover,
.nav-btn:hover:not(:disabled),
.zoom-btn:hover {
  border-color: oklch(1 0 0 / 0.5);
  background: oklch(1 0 0 / 0.1);
  transform: scale(1.05);
}

.close-btn:active,
.nav-btn:active:not(:disabled),
.zoom-btn:active {
  transform: scale(0.95);
  transition: transform 0.08s ease;
}

.nav-btn:disabled,
.zoom-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.close-btn svg,
.nav-btn svg,
.zoom-btn svg {
  width: 1rem;
  height: 1rem;
  stroke: oklch(1 0 0 / 0.6);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  transition: stroke 0.15s ease;
}

.close-btn:hover svg,
.nav-btn:hover:not(:disabled) svg,
.zoom-btn:hover svg {
  stroke: oklch(1 0 0 / 0.95);
}

/* Zoom reset shows percentage */
.zoom-reset-btn {
  width: auto;
  min-width: 3.5rem;
  padding: 0 0.75rem;
  border-radius: var(--radius-md, 20px);
  font-family: var(--font-body, 'Cormorant Garamond', serif);
  font-size: 0.75rem;
  color: oklch(1 0 0 / 0.6);
  letter-spacing: 0.04em;
}

.zoom-reset-btn:hover {
  color: oklch(1 0 0 / 0.95);
}

/* Image Container */
.image-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.image-container.dragging {
  cursor: grabbing;
}

.image-container.loading {
  cursor: wait;
}

/* Image */
.image-display {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: var(--radius-sm, 8px);
  box-shadow: 0 10px 60px oklch(0 0 0 / 0.5);
  transition: transform 0.1s ease;
  transform-origin: center center;
  pointer-events: none;
}

.image-container.loading .image-display {
  opacity: 0.3;
}

/* Navigation Overlay Buttons */
.nav-overlay {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
}

.nav-overlay.left {
  left: 1.5rem;
}

.nav-overlay.right {
  right: 1.5rem;
}

.nav-overlay .nav-btn {
  width: 3rem;
  height: 3rem;
  background: oklch(0.15 0 0 / 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-color: oklch(1 0 0 / 0.15);
}

.nav-overlay .nav-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Loading Spinner */
.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: oklch(0.12 0.01 0 / 0.8);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  pointer-events: none;
}

.image-container.loading .loading-overlay {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 2px solid oklch(1 0 0 / 0.15);
  border-top-color: oklch(1 0 0 / 0.7);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Error State */
.error-state,
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  color: oklch(1 0 0 / 0.4);
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.error-state svg,
.empty-state svg {
  width: 4rem;
  height: 4rem;
  stroke: currentColor;
  stroke-width: 1.25;
  fill: none;
  opacity: 0.6;
}

.error-state span,
.empty-state span {
  font-family: var(--font-body, 'Cormorant Garamond', serif);
  font-style: italic;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
}

/* Footer */
.footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid oklch(1 0 0 / 0.08);
  flex-shrink: 0;
  background: oklch(0.1 0 0 / 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* HDR Enhancement */
@media (dynamic-range: high) {
  .title {
    color: var(--hdr-white-bright, oklch(1.15 0 0));
  }

  .image-display {
    box-shadow: 0 10px 60px oklch(0 0 0 / 0.7),
                0 0 100px oklch(1 0 0 / 0.05);
  }

  .close-btn:hover svg,
  .nav-btn:hover:not(:disabled) svg,
  .zoom-btn:hover svg {
    stroke: var(--hdr-white-peak, oklch(1.3 0 0));
  }
}

/* Responsive */
@media (max-width: 700px) {
  .header {
    padding: 0.75rem 1rem;
  }

  .title {
    font-size: 0.9rem;
    max-width: 150px;
  }

  .image-info {
    display: none;
  }

  .close-btn,
  .nav-btn,
  .zoom-btn {
    width: 2.25rem;
    height: 2.25rem;
  }

  .nav-overlay {
    display: none;
  }

  .footer {
    padding: 0.75rem 1rem;
  }

  .zoom-controls {
    gap: 0.25rem;
  }

  .zoom-reset-btn {
    min-width: 3rem;
    padding: 0 0.5rem;
  }
}

/* Very small screens */
@media (max-width: 400px) {
  .header-right .counter {
    display: none;
  }
}

/* Large screens */
@media (min-width: 1200px) {
  .image-display {
    max-width: 85%;
    max-height: 85%;
  }

  .nav-overlay .nav-btn {
    width: 3.5rem;
    height: 3.5rem;
  }
}

/* Animation for image load */
@keyframes image-appear {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.image-display {
  animation: image-appear 0.4s ease;
}

/* Focus states */
.close-btn:focus-visible,
.nav-btn:focus-visible,
.zoom-btn:focus-visible {
  outline: 1px solid oklch(1 0 0 / 0.6);
  outline-offset: 2px;
}