/* ==========================================================================
   SLICE STYLING SYSTEM (Monochrome / Bauhaus / Glitch Grid)
   ========================================================================== */

:root {
  /* Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #121212;
  --bg-tertiary: #1a1a1a;
  --fg-primary: #ffffff;
  --fg-secondary: #888888;
  --fg-tertiary: #555555;
  --border-color: #262626;
  --border-active: #ffffff;
  
  /* Typography */
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Space Mono', monospace;
  
  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-grid: 0.2s cubic-bezier(0.34, 1.56, 0.64, 1); /* Bouncy layout */
}

/* Base resets & theme */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--fg-tertiary);
}

/* Layout container */
.app-container {
  display: grid;
  grid-template-columns: 380px 1fr;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  transition: grid-template-columns 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.app-container.sidebar-collapsed {
  grid-template-columns: 0px 1fr;
}

@media (max-width: 900px) {
  .app-container {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  }
  .app-container.sidebar-collapsed {
    grid-template-rows: 0px 1fr;
  }
}

/* ==========================================================================
   LEFT PANEL: Controls
   ========================================================================== */
.controls-panel {
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  overflow-y: auto;
  max-height: 100vh;
  max-height: 100dvh;
  width: 380px;
  min-width: 380px;
  box-sizing: border-box;
  overflow-x: hidden;
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.4s ease, min-width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), padding 0.4s ease, border-color 0.4s ease;
}

.app-container.sidebar-collapsed .controls-panel {
  transform: translateX(-100%);
  opacity: 0;
  min-width: 0px;
  padding-left: 0;
  padding-right: 0;
  border-right-color: transparent;
  pointer-events: none;
}

@media (max-width: 900px) {
  .controls-panel {
    width: 100%;
    min-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 30px 20px;
    max-height: none;
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
  }
  .app-container.sidebar-collapsed .controls-panel {
    transform: translateY(-100%);
    opacity: 0;
    min-width: 100%;
    padding-top: 0;
    padding-bottom: 0;
    border-bottom-color: transparent;
    pointer-events: none;
  }
}

/* App Header */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  line-height: 1;
}

.app-subtitle {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--fg-secondary);
  letter-spacing: 0.25em;
}

/* Upload Zone */
.upload-zone {
  border: 1px dashed var(--border-color);
  background-color: var(--bg-primary);
  border-radius: 4px;
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition-normal), background-color var(--transition-normal);
}

.upload-zone:hover {
  border-color: var(--border-active);
  background-color: var(--bg-tertiary);
}

.upload-zone.dragover {
  border-color: var(--border-active);
  background-color: var(--bg-tertiary);
  transform: scale(0.98);
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}

.upload-icon {
  width: 32px;
  height: 32px;
  color: var(--fg-secondary);
  transition: color var(--transition-normal), transform var(--transition-normal);
}

.upload-zone:hover .upload-icon {
  color: var(--fg-primary);
  transform: translateY(-2px);
}

.upload-text {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.upload-subtext {
  font-size: 0.75rem;
  color: var(--fg-secondary);
  letter-spacing: 0.05em;
}

/* Dashboard Controls */
.dashboard {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 4px 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 14px 20px;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition-normal);
  text-decoration: none;
  outline: none;
}

.btn-icon {
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--fg-primary);
  color: var(--bg-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--bg-primary);
  color: var(--fg-primary);
  border-color: var(--fg-primary);
}

.btn-secondary {
  background-color: transparent;
  color: var(--fg-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--border-active);
  background-color: var(--bg-tertiary);
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-style: dashed;
}

/* Range Sliders */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--fg-secondary);
  letter-spacing: 0.1em;
}

.control-value {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--fg-primary);
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  outline: none;
  transition: background var(--transition-normal);
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fg-primary);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fg-primary);
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast);
}

.range-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}


/* Footer */
.app-footer {
  margin-top: auto;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--fg-tertiary);
  letter-spacing: 0.1em;
}

@media (max-width: 900px) {
  .app-footer {
    margin-top: 20px;
  }
}

/* ==========================================================================
   RIGHT PANEL: Grid Display
   ========================================================================== */
.grid-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px;
  background-color: var(--bg-primary);
  position: relative;
}

@media (max-width: 900px) {
  .grid-display {
    padding: 20px;
  }
}

.grid-wrapper {
  width: 100%;
  max-width: 816px; /* 800px grid + 16px padding */
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border-color);
  padding: 8px;
  background-color: var(--bg-secondary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid-container {
  display: grid;
  /* Columns and rows will be set dynamically via JS */
  width: 100%;
  height: 100%;
  gap: 0;
  position: relative;
  background-color: var(--bg-primary);
  overflow: hidden;
}

/* Grid Cells */
.grid-cell {
  position: relative;
  grid-column: var(--col);
  grid-row: var(--row);
  width: calc(100% + 1px);
  height: calc(100% + 1px);
}

/* Double-buffered Layers for Direct Cross-fading */
.cell-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: var(--img-url);
  background-size: var(--perfect-size) var(--perfect-size);
  background-position: calc(-1 * (var(--orig-col) - 1) * var(--cell-size)) calc(-1 * (var(--orig-row) - 1) * var(--cell-size));
  background-repeat: no-repeat;
  transition: opacity var(--fade-duration, 1000ms) ease-in-out;
  will-change: opacity;
}


/* Hover effects for grid cells when solved (idle) */
.grid-container.idle .grid-cell:hover {
  outline: 1px solid #ffffff;
  z-index: 10;
  transform: scale(1.05);
}


/* Phase container and status label under the grid */
.phase-container {
  display: flex;
  align-items: center;
  gap: 16px;
  user-select: none;
}

.countdown-timer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-primary);
  letter-spacing: 0.15em;
  font-weight: 700;
  border-right: 1px solid var(--border-color);
  padding-right: 16px;
  user-select: none;
}

.phase-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-secondary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  user-select: none;
}

/* Upload & Gallery Instructions */
.upload-zone-wrapper {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.gallery-instructions {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--fg-secondary);
  line-height: 1.5;
  letter-spacing: 0.02em;
  text-align: left;
}

/* Export description */
.export-description {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--fg-secondary);
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin-top: 4px;
}

/* ==========================================================================
   GALLERY STYLING
   ========================================================================== */
.upload-zone.has-gallery {
  cursor: default;
  padding: 16px;
  border-style: solid;
  background-color: var(--bg-secondary);
}

.upload-zone.has-gallery:hover {
  border-color: var(--border-color);
  background-color: var(--bg-secondary);
}

.gallery-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-height: 180px;
  overflow-y: auto;
  padding: 4px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  cursor: pointer;
  background-color: var(--bg-primary);
  transition: border-color var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-normal);
}

.gallery-item:hover {
  border-color: var(--fg-secondary);
  transform: scale(1.05);
}

.gallery-item.active {
  border-color: var(--border-active);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.gallery-add-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  border: 1px dashed var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.gallery-add-btn:hover {
  border-color: var(--border-active);
  background-color: var(--bg-primary);
  transform: scale(1.05);
}

.gallery-add-icon {
  font-size: 1.8rem;
  color: var(--fg-secondary);
  line-height: 1;
  transition: color var(--transition-normal);
}

.gallery-add-btn:hover .gallery-add-icon {
  color: var(--fg-primary);
}

/* Sidebar Toggle Handle */
.sidebar-toggle {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 24px;
  height: 60px;
  border-radius: 0 8px 8px 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: none;
  color: var(--fg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 4px 0 12px rgba(0, 0, 0, 0.3);
}

.sidebar-toggle:hover {
  width: 28px;
  background-color: var(--border-color);
  color: var(--fg-primary);
}

.sidebar-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

/* Chevron rotates when collapsed on desktop */
.app-container.sidebar-collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

@media (max-width: 900px) {
  .sidebar-toggle {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 24px;
    border-radius: 0 0 8px 8px;
    border-left: 1px solid var(--border-color);
    border-top: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
  
  .sidebar-toggle:hover {
    width: 60px;
    height: 28px;
  }
  
  /* Chevron points up/down on mobile */
  .sidebar-toggle svg {
    transform: rotate(90deg); /* points up/down by default */
  }
  
  .app-container.sidebar-collapsed .sidebar-toggle svg {
    transform: rotate(-90deg);
  }
}

/* ==========================================================================
   CAMERA & SELFIE STYLING
   ========================================================================== */
.gallery-camera-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  border: 1px dashed var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.gallery-camera-btn:hover {
  border-color: var(--border-active);
  background-color: var(--bg-primary);
  transform: scale(1.05);
}

.gallery-camera-icon {
  font-size: 1.3rem;
  color: var(--fg-secondary);
  line-height: 1;
  transition: color var(--transition-normal);
}

.gallery-camera-btn:hover .gallery-camera-icon {
  color: var(--fg-primary);
}

/* Upload prompt divider & small button styling */
.upload-prompt-divider {
  display: flex;
  align-items: center;
  width: 100%;
  margin: 8px 0;
  gap: 12px;
}

.upload-prompt-divider::before,
.upload-prompt-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

.upload-prompt-divider span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-tertiary);
  letter-spacing: 0.1em;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

/* Camera Dialog Modal */
.camera-modal {
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--fg-primary);
  border-radius: 6px;
  padding: 24px;
  width: 90%;
  max-width: 440px;
  margin: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  outline: none;
}

.camera-modal::backdrop {
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
}

.camera-modal-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.camera-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.camera-modal-title {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin: 0;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--fg-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-normal);
  outline: none;
}

.close-modal-btn:hover {
  color: var(--fg-primary);
}

.camera-viewfinder-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #000000;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.camera-stream {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* Mirror view for natural interaction */
}

/* Retro Camera Viewfinder Elements */
.camera-reticle {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.camera-reticle::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--fg-primary);
  border-left: 2px solid var(--fg-primary);
}

.camera-reticle::after {
  content: '';
  position: absolute;
  top: 16px;
  right: 16px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--fg-primary);
  border-right: 2px solid var(--fg-primary);
}

.camera-reticle-bottom::before {
  content: '';
  position: absolute;
  bottom: 16px;
  left: 16px;
  width: 16px;
  height: 16px;
  border-bottom: 2px solid var(--fg-primary);
  border-left: 2px solid var(--fg-primary);
}

.camera-reticle-bottom::after {
  content: '';
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 16px;
  height: 16px;
  border-bottom: 2px solid var(--fg-primary);
  border-right: 2px solid var(--fg-primary);
}

/* Visual Flash Effect */
.camera-flash {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  opacity: 0;
  pointer-events: none;
}

.camera-flash.flash-active {
  animation: camera-flash-anim 0.35s ease-out forwards;
}

@keyframes camera-flash-anim {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

.camera-modal-controls {
  display: flex;
  justify-content: center;
  width: 100%;
}

.camera-modal-controls .btn {
  width: 100%;
}

.camera-preview-controls {
  display: flex;
  gap: 12px;
  width: 100%;
}

.camera-preview-controls .btn {
  flex: 1;
}