/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-color: #0b0f19;
  --surface-color: #131b2e;
  --surface-hover: #1c2742;
  --surface-card: rgba(26, 36, 61, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.4);
  
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.25);
  --primary-dark: #0284c7;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(11, 15, 25, 0.85);
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 20px var(--primary-glow);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
}

.brand-text .sub-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.btn-ghost {
  background: var(--surface-color);
  color: var(--text-muted);
  border-color: var(--border-color);
}

.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text-main);
  border-color: var(--border-hover);
}

/* ==========================================================================
   Gallery Grid
   ========================================================================== */
.gallery-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

.gallery-intro {
  margin-bottom: 2rem;
}

.gallery-intro h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.gallery-intro p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.photo-card {
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(10px);
  position: relative;
  display: flex;
  flex-direction: column;
}

.photo-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.6), 0 0 24px var(--primary-glow);
}

.photo-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #080b12;
}

.photo-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.photo-card:hover .photo-thumb {
  transform: scale(1.06);
}

.badge-360 {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  z-index: 2;
}

.badge-res {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(56, 189, 248, 0.2);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  z-index: 2;
}

.photo-overlay-prompt {
  position: absolute;
  inset: 0;
  background: rgba(11, 15, 25, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 3;
}

.photo-card:hover .photo-overlay-prompt {
  opacity: 1;
}

.overlay-btn-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.9);
  color: #0b0f19;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.85);
  transition: transform var(--transition-normal);
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.6);
}

.photo-card:hover .overlay-btn-icon {
  transform: scale(1);
}

.photo-meta {
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.photo-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.photo-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.photo-card-id {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 700;
}

.photo-card-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.photo-card-filename {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

/* ==========================================================================
   360 Fullscreen Viewer Modal
   ========================================================================== */
.viewer-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: #000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.viewer-modal.active {
  opacity: 1;
  visibility: visible;
}

#panoramaViewer {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  background-color: #05070c;
}

/* Hide Pannellum default watermark and controls for clean UI */
.pnlm-load-box, .pnlm-about-msg {
  display: none !important;
}

/* Loader */
.viewer-loader {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  z-index: 1010;
  pointer-events: none;
  transition: opacity 0.3s ease;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(12px);
  padding: 1.5rem 2.2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.viewer-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.spinner {
  width: 42px;
  height: 42px;
  border: 3px solid rgba(56, 189, 248, 0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.viewer-loader p {
  font-size: 0.9rem;
  color: var(--text-main);
  font-weight: 500;
}

/* Top Floating Bar */
.viewer-topbar {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1020;
  pointer-events: none;
}

.viewer-info, .viewer-controls {
  pointer-events: auto;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  padding: 0.4rem 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.viewer-info {
  padding-left: 0.4rem;
  padding-right: 1.25rem;
}

.meta-texts {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.photo-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.photo-counter {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.15);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.photo-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: scale(1.05);
}

.control-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.control-btn.icon-only {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.control-btn.active {
  background: var(--primary);
  color: #0b0f19;
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

/* Side Navigation Arrows */
.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1020;
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.nav-arrow.prev {
  left: 1.5rem;
}

.nav-arrow.next {
  right: 1.5rem;
}

.nav-arrow:hover {
  background: rgba(56, 189, 248, 0.9);
  color: #0b0f19;
  border-color: transparent;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.6);
}

/* Bottom Filmstrip Drawer */
.bottom-filmstrip-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1020;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(calc(100% - 38px));
}

.bottom-filmstrip-wrap.expanded {
  transform: translateY(0);
}

.filmstrip-toggle {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: none;
  border-radius: 12px 12px 0 0;
  padding: 0.4rem 1.2rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

.filmstrip-toggle:hover {
  color: #fff;
  background: rgba(26, 36, 61, 0.9);
}

.toggle-arrow {
  transition: transform 0.3s ease;
}

.bottom-filmstrip-wrap.expanded .toggle-arrow {
  transform: rotate(180deg);
}

.filmstrip {
  width: 100%;
  background: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem 1.5rem 1rem;
  display: flex;
  gap: 0.85rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-hover) transparent;
}

.filmstrip::-webkit-scrollbar {
  height: 6px;
}
.filmstrip::-webkit-scrollbar-thumb {
  background: var(--surface-hover);
  border-radius: 3px;
}

.filmstrip-item {
  flex: 0 0 120px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  background: #000;
}

.filmstrip-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.filmstrip-item:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.4);
}

.filmstrip-item:hover img {
  opacity: 1;
}

.filmstrip-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}

.filmstrip-item.active img {
  opacity: 1;
}

.filmstrip-item .index-tag {
  position: absolute;
  bottom: 4px;
  right: 4px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
}

/* ==========================================================================
   Shortcuts Modal
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 480px;
  padding: 1.5rem;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
}

.shortcuts-table td {
  padding: 0.75rem 0.5rem;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.shortcuts-table td:last-child {
  color: var(--text-muted);
  text-align: right;
}

kbd {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 768px) {
  .header-container {
    padding: 0.85rem 1rem;
  }
  .hide-mobile {
    display: none;
  }
  .gallery-container {
    padding: 1.5rem 1rem 4rem;
  }
  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.2rem;
  }
  .viewer-topbar {
    top: 0.75rem;
    left: 0.75rem;
    right: 0.75rem;
  }
  .btn-label {
    display: none;
  }
  .photo-date {
    display: none;
  }
  .nav-arrow {
    width: 44px;
    height: 44px;
  }
  .nav-arrow.prev {
    left: 0.75rem;
  }
  .nav-arrow.next {
    right: 0.75rem;
  }
}