body {
  background: #f4f7fc;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

.converter-card {
  max-width: 850px;
  margin: 2rem auto;
  border-radius: 2rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: 1.5rem 2rem;
}

.drop-zone {
  border: 2px dashed #b0c4de;
  border-radius: 1.5rem;
  background: #f8faff;
  transition: all 0.25s ease;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  color: #2c3e50;
}

.drop-zone.dragover {
  background: #e6f0ff;
  border-color: #0d6efd;
  box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.15);
  transform: scale(1.01);
}

.file-list {
  max-height: 320px;
  overflow-y: auto;
  background: #ffffff;
  border-radius: 1rem;
  padding: 0.5rem;
  margin-top: 1.2rem;
  border: 1px solid #e9eef2;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f9fcff;
  border-radius: 0.8rem;
  padding: 0.6rem 1rem;
  margin-bottom: 0.4rem;
  transition: 0.1s;
}

.file-item:hover {
  background: #eef3ff;
}

.file-name {
  font-weight: 500;
  color: #1e293b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

.remove-file-btn {
  color: #dc3545;
  cursor: pointer;
  font-size: 1.3rem;
  opacity: 0.7;
  transition: 0.2s;
}

.remove-file-btn:hover {
  opacity: 1;
  transform: scale(1.15);
}

.quality-badge {
  background: #e9ecef;
  padding: 0.35rem 1rem;
  border-radius: 2rem;
  font-size: 0.9rem;
}

.progress {
  height: 10px;
  border-radius: 1rem;
}

.toast-container-custom {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
}

.btn-modern {
  border-radius: 3rem;
  padding: 0.7rem 1.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: all 0.2s;
}

.btn-primary-glow {
  background: #0d6efd;
  border: none;
  box-shadow: 0 6px 20px rgba(13, 110, 253, 0.3);
}

.btn-primary-glow:hover {
  background: #0b5ed7;
  box-shadow: 0 10px 25px rgba(13, 110, 253, 0.45);
  transform: translateY(-1px);
}

.format-badge {
  background: #212529;
  color: white;
  border-radius: 20px;
  padding: 0.2rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: 0.5rem;
}

.download-individual {
  transition: all 0.2s ease;
}

.download-individual:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}