:root {
  --mural-bg: #e5e5f7;
  --accent-color: #2e7d32;
  --accent-hover: #1b5e20;
  --text-color: #2c3e50;
  --card-shadow: 0 10px 25px rgba(0,0,0,0.1);
  --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --paper-cream: #fffdf5;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body, html, #root {
  width: 100%;
  height: 100%;
  font-family: var(--font-main);
  overflow: hidden;
  background-color: #d7ccc8;
}

.mural-container {
  width: 100%;
  height: 100%;
  background-image: url('mural_background.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Subtle overlay to make content pop */
.mural-container::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, rgba(0,0,0,0) 0%, rgba(0,0,0,0.05) 100%);
  pointer-events: none;
}

.mural-header {
  padding: 16px 32px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
  z-index: 100;
}

.mural-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 12px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.05);
  letter-spacing: -0.5px;
}

.mural-canvas {
  flex-grow: 1;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 60px 40px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 40px;
  align-content: start;
  scroll-behavior: smooth;
}

.pdf-card {
  background: var(--paper-cream);
  padding: 18px;
  border-radius: 2px;
  box-shadow: 
    2px 2px 5px rgba(0,0,0,0.1),
    0 10px 20px rgba(0,0,0,0.08);
  transform: rotate(var(--rotation, 0deg));
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 15px;
  position: relative;
  height: fit-content;
  animation: cardEntrance 0.6s ease-out backwards;
}

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(30px) rotate(0deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotate(var(--rotation, 0deg));
  }
}

.pdf-card:hover {
  transform: scale(1.04) rotate(0deg) translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
  z-index: 50;
}

/* Washi Tape decoration */
.washi-tape {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
  width: 90px;
  height: 28px;
  background: rgba(var(--tape-color, 255, 235, 59), 0.6);
  backdrop-filter: blur(1px);
  border-left: 2px dashed rgba(0,0,0,0.05);
  border-right: 2px dashed rgba(0,0,0,0.05);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  z-index: 10;
}

/* Push Pin decoration */
.push-pin {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 20px;
  height: 20px;
  background: radial-gradient(circle at 30% 30%, #ff5252, #b71c1c);
  border-radius: 50%;
  box-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  z-index: 20;
}

.push-pin::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  background: rgba(255,255,255,0.4);
  border-radius: 50%;
}

.pdf-preview {
  width: 100%;
  aspect-ratio: 1/1;
  background: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.pdf-preview .file-icon {
  width: 48px;
  height: 48px;
  color: #e74c3c;
}

.pdf-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.pdf-card:hover .pdf-thumbnail {
  transform: scale(1.1);
}

.pdf-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px dashed #ddd;
  padding-top: 12px;
}

.pdf-name {
  font-weight: 700;
  color: var(--text-color);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 1rem;
}

.pdf-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  flex: 1;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #eee;
  background: white;
  color: #666;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}

.action-btn:hover {
  background: #fdfdfd;
  color: #333;
  border-color: #ddd;
  transform: translateY(-1px);
}

.action-btn.primary {
  background: var(--accent-color);
  color: white;
  border: none;
}

.action-btn.primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
}

.upload-btn {
  background: var(--accent-color);
  color: white;
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 15px rgba(46, 125, 50, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 125, 50, 0.4);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@media (max-width: 600px) {
  .mural-canvas {
    padding: 20px;
    grid-template-columns: 1fr;
  }
}