.fsc-converter {
  width: 100%;
  max-width: 1000px;
  margin: 2rem auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2rem;
  overflow: hidden;
  box-shadow:
    0 20px 50px -12px rgba(6, 182, 212, 0.1),
    0 0 0 1px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.fsc-header {
  padding: 2.5rem;
  background: radial-gradient(circle at 0% 0%, rgba(6, 182, 212, 0.03) 0%, transparent 40%);
  border-bottom: 1px solid var(--border-color);
}

.fsc-input-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.fsc-input-wrapper {
  flex: 1;
  position: relative;
}

.fsc-input {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1.125rem;
  border: 2px solid var(--border-color);
  border-radius: 0.875rem;
  background: var(--bg-page);
  color: var(--text-main);
  transition: all 0.3s ease;
}

.fsc-input:focus {
  outline: none;
  border-color: #0ea5e9;
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.fsc-input-drop-zone {
  position: relative;
}

.fsc-input-drop-zone.fsc-dragover .fsc-input {
  border-color: #0ea5e9;
  background: rgba(6, 182, 212, 0.05);
}

.fsc-unit-select {
  padding: 1rem 2.75rem 1rem 1.25rem;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.875rem;
  background: var(--bg-page) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E") no-repeat right 1rem center;
  background-size: 12px;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.fsc-unit-select:focus {
  outline: none;
  border-color: #0ea5e9;
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.fsc-unit-select:hover {
  border-color: #0ea5e9;
}

.fsc-standard-toggle {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-page);
  padding: 0.375rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border-color);
  width: fit-content;
}

.fsc-toggle-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  border-radius: 0.625rem;
  transition: all 0.2s ease;
}

.fsc-toggle-btn.fsc-active {
  background: #0ea5e9;
  color: white;
}

.fsc-main {
  padding: 2.5rem;
  background: var(--bg-page);
  flex: 1;
}

.fsc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  grid-auto-rows: 1fr;
}

.fsc-block {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.fsc-block:hover {
  border-color: #0ea5e9;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.15);
  transform: translateY(-2px);
}

.fsc-block-origin {
  border: 3px solid #0ea5e9;
  box-shadow: 0 0 0 1px var(--border-color), 0 0 20px rgba(6, 182, 212, 0.3);
  background: var(--bg-surface);
}

.fsc-block-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 2.5rem;
  display: flex;
  align-items: center;
}

.fsc-block-unit {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.fsc-block-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #0ea5e9, #6366f1);
  width: 0%;
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.fsc-section {
  margin-bottom: 2rem;
}

.fsc-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.fsc-network-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.fsc-network-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.fsc-network-speed {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.fsc-network-time {
  font-size: 1.5rem;
  font-weight: 800;
  color: #0ea5e9;
}

.fsc-device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.fsc-device-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.fsc-device-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.fsc-device-usage {
  font-size: 1.5rem;
  font-weight: 800;
  color: #6366f1;
}

.fsc-device-bar {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.fsc-device-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #0ea5e9);
  transition: width 0.6s ease;
}

.fsc-hidden {
  display: none;
}

@media (max-width: 700px) {
  .fsc-header {
    padding: 1.5rem;
  }

  .fsc-main {
    padding: 1.5rem;
  }

  .fsc-input-group {
    flex-direction: column;
  }

  .fsc-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
  }

  .fsc-block-value {
    font-size: 1.25rem;
  }

  .fsc-network-grid,
  .fsc-device-grid {
    grid-template-columns: 1fr;
  }
}