.papers-container,
.recordings-container {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  animation: fadeIn 0.6s ease-out;
}

.filters-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  height: fit-content;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--grey-200);
  position: sticky;
  top: 120px;
}

.filters-card:hover {
  box-shadow: var(--shadow-lg);
}

.filters-card h2 {
  color: var(--blue-700);
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--blue-100);
}

.filter-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--grey-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--grey-200);
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--white);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239e9e9e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

.filter-select:hover {
  border-color: var(--blue-300);
}

.filter-select:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.1);
}

.papers-list-card,
.recordings-list-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--grey-200);
  transition: all 0.3s ease;
}

.papers-list-card:hover,
.recordings-list-card:hover {
  box-shadow: var(--shadow-lg);
}

.papers-list-card h2,
.recordings-list-card h2 {
  color: var(--blue-700);
  font-size: 1.5rem;
  margin-bottom: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--blue-100);
}

.papers-grid,
.recordings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  min-height: 300px;
}

.paper-card,
.recording-card {
  background: linear-gradient(135deg, var(--blue-50) 0%, var(--light-blue) 100%);
  padding: 2rem;
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.paper-card::before,
.recording-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, transparent 50%, rgba(33, 150, 243, 0.15) 50%);
  border-radius: 0 0 0 100%;
  opacity: 0;
  transform: translate(60%, -60%) scale(0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.paper-card:hover,
.recording-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(33, 150, 243, 0.2);
  border-color: var(--blue-400);
  background: linear-gradient(135deg, var(--blue-100) 0%, var(--blue-200) 100%);
}

.paper-card:hover::before,
.recording-card:hover::before {
  opacity: 1;
  transform: translate(50%, -50%) scale(1);
}

.paper-card h3,
.recording-card h3 {
  color: var(--blue-700);
  margin-bottom: 1.25rem;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.015em;
  position: relative;
  z-index: 1;
}

.paper-info,
.recording-info {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.paper-detail,
.recording-detail {
  display: flex;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(33, 150, 243, 0.2);
}

.detail-label {
  color: var(--grey-500);
  font-weight: 500;
  font-size: 0.875rem;
}

.detail-value {
  color: var(--blue-700);
  font-weight: 600;
  font-size: 0.875rem;
}

.download-button {
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: var(--white);
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(33, 150, 243, 0.3);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.download-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.download-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
}

.download-button:hover::before {
  left: 100%;
}

.download-button:active {
  transform: translateY(0);
}

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  grid-column: 1 / -1;
  min-height: 300px;
  padding: 3rem;
}

.loading-spinner p {
  margin-top: 1rem;
  color: var(--grey-500);
  font-size: 1rem;
}

.no-papers,
.no-recordings {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 2rem;
  color: var(--grey-500);
  background: linear-gradient(135deg, var(--grey-50) 0%, var(--grey-100) 100%);
  border-radius: 16px;
  font-weight: 500;
  font-size: 1rem;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  z-index: 3000;
  justify-content: center;
  align-items: center;
}

.modal.show {
  display: flex;
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-content {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 20px;
  width: 90%;
  max-width: 500px;
  position: relative;
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--grey-200);
}

@keyframes slideUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close-modal {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 28px;
  cursor: pointer;
  color: var(--grey-400);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grey-100);
}

.close-modal:hover {
  color: var(--error-red);
  background: var(--error-red-light);
  transform: rotate(90deg);
}

.modal-content h2 {
  color: var(--blue-700);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.download-info {
  margin: 2rem 0;
}

#download-filename {
  font-weight: 500;
  color: var(--blue-700);
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.download-progress-container {
  width: 100%;
  height: 10px;
  background: var(--grey-200);
  border-radius: 100px;
  overflow: hidden;
  margin-top: 1.25rem;
}

.download-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-500), var(--blue-400));
  width: 0%;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 100px;
}

.status-message {
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
  margin-top: 1.25rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.status-message.success {
  background: var(--success-green-light);
  color: var(--success-green);
  border-left: 4px solid var(--success-green);
}

.status-message.error {
  background: var(--error-red-light);
  color: var(--error-red);
  border-left: 4px solid var(--error-red);
}

@media (max-width: 1024px) {
  .papers-container,
  .recordings-container {
    grid-template-columns: 280px 1fr;
    gap: 24px;
  }

  .filters-card {
    position: static;
  }
}

@media (max-width: 768px) {
  .papers-container,
  .recordings-container {
    grid-template-columns: 1fr;
  }

  .filters-card {
    margin-bottom: 24px;
  }

  .papers-grid,
  .recordings-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .papers-grid,
  .recordings-grid {
    grid-template-columns: 1fr;
  }

  .paper-card,
  .recording-card {
    padding: 1.5rem;
  }

  .modal-content {
    padding: 2rem 1.5rem;
  }
}