/* 부가세 계산기 다크 테마 전용 스타일 */
body {
  background-color: #0f172a;
  color: #f8fafc;
}

.calc-card {
  max-width: 600px;
  margin: 30px auto;
  padding: 24px;
  background: #1e293b;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  border: 1px solid #334155;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.panel-icon {
  font-size: 24px;
}

.panel-title {
  font-size: 20px;
  font-weight: 700;
  color: #f8fafc;
  margin: 0;
}

.panel-hint {
  font-size: 14px;
  color: #94a3b8;
  margin-bottom: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: #cbd5e1;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  background-color: #0f172a;
  color: #f8fafc;
  border: 1px solid #334155;
  border-radius: 8px;
  box-sizing: border-box;
  transition: all 0.2s ease;
}

.input-wrapper input:focus {
  outline: none;
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.unit-text-label {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #64748b;
  font-size: 14px;
  pointer-events: none;
}

/* 히스토리 저장 버튼 스타일 */
.btn-save {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-save:hover {
  background: #1d4ed8;
}