@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@300;400;600;700;800;900&display=swap');

:root {
  --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --bg-gradient: radial-gradient(circle at 50% 20%, #1e1b4b 0%, #0f172a 40%, #030712 100%);
  --bubble-blue: rgba(59, 130, 246, 0.25);
  --bubble-blue-border: rgba(96, 165, 250, 0.6);
  --bubble-blue-glow: rgba(59, 130, 246, 0.4);

  --bubble-purple: rgba(168, 85, 247, 0.25);
  --bubble-purple-border: rgba(192, 132, 252, 0.6);
  --bubble-purple-glow: rgba(168, 85, 247, 0.4);

  --bubble-emerald: rgba(16, 185, 129, 0.25);
  --bubble-emerald-border: rgba(52, 211, 153, 0.6);
  --bubble-emerald-glow: rgba(16, 185, 129, 0.4);

  --bubble-amber: rgba(245, 158, 11, 0.25);
  --bubble-amber-border: rgba(251, 191, 36, 0.6);
  --bubble-amber-glow: rgba(245, 158, 11, 0.4);

  --bubble-pink: rgba(236, 72, 153, 0.25);
  --bubble-pink-border: rgba(244, 114, 182, 0.6);
  --bubble-pink-glow: rgba(236, 72, 153, 0.4);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-main);
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-gradient);
  color: #f8fafc;
}

/* Background Particle Canvas */
#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Main Display Container */
.wall-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  z-index: 10;
  overflow: hidden;
}

/* Header Banner */
.wall-header {
  position: absolute;
  top: 24px;
  left: 36px;
  display: flex;
  align-items: center;
  gap: 18px;
  z-index: 50;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px 24px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.event-badge {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 8px;
  text-transform: uppercase;
}

.wall-title {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff, #93c5fd, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.wall-stats {
  font-size: 0.85rem;
  color: #94a3b8;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  padding-left: 14px;
}

.wall-stats span {
  color: #38bdf8;
  font-weight: 700;
}

/* QR Code Live Guide Panel */
.qr-panel {
  position: absolute;
  bottom: 28px;
  right: 32px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 50;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(59, 130, 246, 0.2);
  transition: transform 0.3s ease;
}

.qr-panel:hover {
  transform: translateY(-4px) scale(1.02);
}

.qr-box {
  width: 90px;
  height: 90px;
  background: #ffffff;
  border-radius: 12px;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.qr-box img, .qr-box canvas {
  width: 100%;
  height: 100%;
}

.qr-info h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: #f8fafc;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.qr-info p {
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.35;
}

.qr-url {
  font-size: 0.7rem;
  color: #38bdf8;
  margin-top: 4px;
  font-weight: 600;
}

/* Floating Bubbles Canvas Area */
#bubble-stage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 20;
  overflow: hidden;
}

/* Individual Floating Bubble */
.bubble {
  position: absolute;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 2px 6px rgba(255, 255, 255, 0.4), 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.25s ease;
  will-change: transform, left, top;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.bubble:hover {
  transform: scale(1.15) !important;
  z-index: 100 !important;
  box-shadow: 0 0 35px var(--glow-color, rgba(59, 130, 246, 0.8)), inset 0 2px 10px rgba(255, 255, 255, 0.6);
}

.bubble.color-blue {
  background: radial-gradient(circle at 35% 35%, rgba(147, 197, 253, 0.35) 0%, rgba(59, 130, 246, 0.2) 60%, rgba(30, 58, 138, 0.3) 100%);
  border-color: var(--bubble-blue-border);
  --glow-color: var(--bubble-blue-glow);
}

.bubble.color-purple {
  background: radial-gradient(circle at 35% 35%, rgba(216, 180, 254, 0.35) 0%, rgba(168, 85, 247, 0.2) 60%, rgba(88, 28, 135, 0.3) 100%);
  border-color: var(--bubble-purple-border);
  --glow-color: var(--bubble-purple-glow);
}

.bubble.color-emerald {
  background: radial-gradient(circle at 35% 35%, rgba(110, 231, 183, 0.35) 0%, rgba(16, 185, 129, 0.2) 60%, rgba(6, 78, 59, 0.3) 100%);
  border-color: var(--bubble-emerald-border);
  --glow-color: var(--bubble-emerald-glow);
}

.bubble.color-amber {
  background: radial-gradient(circle at 35% 35%, rgba(253, 230, 138, 0.35) 0%, rgba(245, 158, 11, 0.2) 60%, rgba(120, 53, 15, 0.3) 100%);
  border-color: var(--bubble-amber-border);
  --glow-color: var(--bubble-amber-glow);
}

.bubble.color-pink {
  background: radial-gradient(circle at 35% 35%, rgba(249, 168, 212, 0.35) 0%, rgba(236, 72, 153, 0.2) 60%, rgba(131, 24, 67, 0.3) 100%);
  border-color: var(--bubble-pink-border);
  --glow-color: var(--bubble-pink-glow);
}

.bubble-emoji {
  font-size: 1.8rem;
  margin-bottom: 4px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.bubble-category {
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(0, 0, 0, 0.25);
  padding: 2px 8px;
  border-radius: 20px;
  margin-bottom: 6px;
  max-width: 90%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bubble-content {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
  color: #ffffff;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: keep-all;
  padding: 0 4px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

.bubble-author {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.bubble-like {
  position: absolute;
  bottom: 8px;
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #f43f5e;
  background: rgba(255, 255, 255, 0.85);
  padding: 2px 8px;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* Modal Popup when Bubble Clicked */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 7, 18, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 28px;
  padding: 32px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(59, 130, 246, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-emoji {
  font-size: 3.5rem;
  margin-bottom: 12px;
  animation: bounce 1.5s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.modal-category {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(96, 165, 250, 0.4);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.modal-content {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.5;
  color: #f8fafc;
  margin-bottom: 18px;
  word-break: keep-all;
}

.modal-author {
  font-size: 0.9rem;
  color: #94a3b8;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.btn-like {
  background: linear-gradient(135deg, #f43f5e, #e11d48);
  color: white;
  border: none;
  padding: 10px 24px;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.4);
  transition: transform 0.15s ease;
}

.btn-like:active {
  transform: scale(0.95);
}

.btn-close {
  background: rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 10px 20px;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-close:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* Fullscreen & Control Tools */
.wall-tools {
  position: absolute;
  top: 24px;
  right: 36px;
  display: flex;
  gap: 10px;
  z-index: 50;
}

.tool-btn {
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #cbd5e1;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background: rgba(59, 130, 246, 0.3);
  color: #fff;
  border-color: rgba(96, 165, 250, 0.5);
}