/* Redesign: Realistic Polaroid Infinite Canvas (PWA & 60fps Smooth Dragging) */
:root {
  --bg-stone: #F8F6F0;
  --card-white: #FFFFFF;
  --text-main: #1C1B18;
  --text-muted: #736F68;
  --border-color: #ECE7DE;
  --border-dark: #D4CBB8;
  
  --primary-dark: #1F1E1B;
  --primary-hover: #383632;
  --secondary-bg: #EFECE6;
  
  --tape-color: rgba(226, 220, 208, 0.75);
  --tape-border: rgba(200, 192, 178, 0.5);

  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-hand: 'Caveat', cursive;

  --shadow-polaroid: 0 14px 38px rgba(28, 27, 24, 0.12), 0 2px 8px rgba(28, 27, 24, 0.05);
  --shadow-drag: 0 24px 50px rgba(28, 27, 24, 0.25), 0 4px 12px rgba(28, 27, 24, 0.1);
  --shadow-fab: 0 10px 30px rgba(31, 30, 27, 0.35);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background-color: var(--bg-stone);
  color: var(--text-main);
  user-select: none;
}

/* Infinite Canvas Viewport & World Matrix */
.canvas-viewport {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  background-image: radial-gradient(#E2DCD0 1.2px, transparent 1.2px);
  background-size: 28px 28px;
}

.canvas-viewport.panning {
  cursor: grabbing !important;
}

.canvas-world {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  will-change: transform;
}

/* Minimal Clean Floating Header */
.floating-header {
  position: fixed;
  top: 16px;
  left: 16px;
  right: 16px;
  z-index: 80;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  pointer-events: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  pointer-events: auto;
}

.counter-badge {
  font-size: 0.825rem;
  font-weight: 600;
  background-color: var(--card-white);
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* Minimal Reset Icon Button (bottom-left) */
.canvas-controls {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 80;
}

.btn-reset-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--card-white);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.09);
  color: var(--text-muted);
  transition: var(--transition);
}

.btn-reset-icon:hover {
  background-color: var(--secondary-bg);
  border-color: var(--border-dark);
  color: var(--text-main);
}

/* Empty State */
.empty-wall {
  position: absolute;
  top: 50vh;
  left: 50vw;
  transform: translate(-50%, -50%);
  text-align: center;
  padding: 3.5rem 2rem;
  background-color: var(--card-white);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-dark);
  width: 380px;
  box-shadow: var(--shadow-polaroid);
  pointer-events: auto;
}

.empty-icon-box {
  width: 56px;
  height: 56px;
  background-color: var(--bg-stone);
  color: var(--text-muted);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem auto;
  border: 1px solid var(--border-color);
}

.empty-wall h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.empty-wall p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* REALISTIC POLAROID PHOTO CARD */
.photo-card {
  position: absolute;
  width: 240px;
  background-color: var(--card-white);
  padding: 0.85rem 0.85rem 1.15rem 0.85rem; /* Authentic Polaroid white frame border */
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-polaroid);
  display: flex;
  flex-direction: column;
  cursor: grab;
  touch-action: none;
  user-select: none;
  z-index: 10;
  will-change: transform, left, top;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

/* Staggered slight polaroid rotation */
.photo-card:nth-child(3n+1) {
  transform: rotate(-1.2deg);
}
.photo-card:nth-child(3n+2) {
  transform: rotate(1.2deg);
}
.photo-card:nth-child(3n+3) {
  transform: rotate(-0.5deg);
}

.photo-card:hover {
  border-color: var(--border-dark);
  box-shadow: 0 16px 40px rgba(28, 27, 24, 0.15);
  z-index: 20;
}

/* Smooth 60fps/120fps Drag State */
.photo-card.dragging {
  cursor: grabbing !important;
  z-index: 100 !important;
  box-shadow: var(--shadow-drag) !important;
  transform: scale(1.05) rotate(0deg) !important;
}

.photo-card.long-pressing {
  transform: scale(0.97);
  box-shadow: 0 0 0 2px var(--primary-dark);
}

/* Translucent Tape Accent at top */
.card-tape {
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%) rotate(-1deg);
  width: 65px;
  height: 17px;
  background-color: var(--tape-color);
  border: 1px solid var(--tape-border);
  z-index: 5;
  pointer-events: none;
}

/* Polaroid Photo Frame */
.photo-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #EFECE6;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.photo-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

/* Authentic Polaroid Handwritten Details */
.card-details {
  padding-top: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

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

.card-date {
  font-family: var(--font-sans);
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.card-note {
  font-family: var(--font-hand);
  font-size: 1.35rem;
  line-height: 1.25;
  color: var(--text-main);
  word-break: break-word;
  margin-top: 0.1rem;
}

.reaction-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.4rem;
}

.reaction-chip {
  background-color: var(--bg-stone);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.15rem 0.45rem;
  font-size: 0.725rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
}

.reaction-chip.active {
  background-color: var(--secondary-bg);
  border-color: var(--border-dark);
}

.btn-card-delete {
  background: none;
  border: none;
  color: #948E85;
  cursor: pointer;
  padding: 0.2rem;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-card-delete:hover {
  color: #DC2626;
}

/* Bottom-Center Circular FAB (+) */
.fab-circle {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--primary-dark);
  color: #FFFFFF;
  border: none;
  box-shadow: var(--shadow-fab);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fab-circle:hover {
  background-color: var(--primary-hover);
  transform: translateX(-50%) translateY(-2px) scale(1.05);
  box-shadow: 0 14px 35px rgba(31, 30, 27, 0.45);
}

.fab-circle:active {
  transform: translateX(-50%) scale(0.92);
}

/* Floating Reaction Picker Bar */
.floating-emoji-picker {
  position: fixed;
  z-index: 200;
  background: #FFFFFF;
  border: 1px solid var(--border-dark);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.25);
  border-radius: 30px;
  padding: 0.35rem 0.65rem;
  display: flex;
  gap: 0.35rem;
  transform: translateX(-50%) translateY(-100%);
  animation: pickerPop 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pickerPop {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-80%) scale(0.7);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(-100%) scale(1);
  }
}

.emoji-pick-btn {
  background: none;
  border: none;
  font-size: 1.35rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 50%;
  transition: transform 0.15s ease;
  line-height: 1;
}

.emoji-pick-btn:hover {
  transform: scale(1.3);
}

/* Modal Overlay & Drawer */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(20, 19, 17, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  padding: 1.5rem;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  background-color: var(--card-white);
  width: 100%;
  max-width: 460px;
  border-radius: var(--radius-md);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
  padding: 1.75rem;
  border: 1px solid var(--border-dark);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.modal-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.modal-header h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  margin-top: 0.1rem;
}

.entry-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.flex-1 {
  flex: 1;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-main);
}

.form-input,
.form-textarea {
  width: 100%;
  min-height: 44px;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text-main);
  background-color: var(--bg-stone);
  transition: var(--transition);
  outline: none;
}

.form-textarea {
  font-family: var(--font-sans);
  min-height: 80px;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--primary-dark);
  background-color: #FFFFFF;
}

.char-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

.drop-zone {
  position: relative;
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-sm);
  background-color: var(--bg-stone);
  padding: 1.25rem;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--primary-dark);
  background-color: var(--secondary-bg);
}

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

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  pointer-events: none;
}

.upload-badge {
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.drop-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.drop-subtitle {
  font-size: 0.725rem;
  color: var(--text-muted);
}

.image-preview-container {
  position: relative;
  width: 100%;
  max-height: 200px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.image-preview-container img {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  display: block;
}

.btn-change-photo {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background-color: var(--primary-dark);
  color: #FFFFFF;
  border: none;
  min-height: 32px;
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 42px;
  padding: 0.6rem 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary-dark);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--secondary-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Lightbox Modal */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 14, 12, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 250;
  padding: 1.5rem;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.lightbox-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.lightbox-card {
  position: relative;
  background-color: var(--card-white);
  padding: 1.25rem 1.25rem 1.5rem 1.25rem;
  border-radius: var(--radius-md);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.btn-lightbox-close {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: var(--bg-stone);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox-img-wrapper {
  width: 100%;
  max-height: 60vh;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img-wrapper img {
  max-width: 100%;
  max-height: 60vh;
  object-fit: contain;
}

.lightbox-details {
  margin-top: 1rem;
  text-align: center;
  max-width: 540px;
}

.lightbox-date {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.2rem;
}

.lightbox-note {
  font-family: var(--font-hand);
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--text-main);
}

.hidden {
  display: none !important;
}

/* Mobile Responsive Drawer */
@media (max-width: 640px) {
  .fab-circle {
    bottom: 20px;
    width: 52px;
    height: 52px;
  }

  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }

  .modal-card {
    max-width: 100%;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    max-height: 85vh;
    padding: 1.25rem 1rem 1.75rem 1rem;
    animation: slideUp 0.3s ease forwards;
  }

  @keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }
}