@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap');

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: #f4f7f6;
    color: #333;
}

.container {
    max-width: 550px;
}

.calculator-card .card-header {
    background: linear-gradient(135deg, #4e54c8, #8f94fb);
    border-bottom: none;
    border-radius: 0.75rem 0.75rem 0 0;
}

.calculator-card .card-title {
    font-weight: 700;
    font-size: 2rem;
}

.card {
    border: none;
    border-radius: 0.75rem;
}

.form-control-lg {
    text-align: center;
    font-weight: 500;
}

.btn-primary {
    background-color: #4e54c8;
    border-color: #4e54c8;
    transition: background-color 0.2s ease-in-out;
}

.btn-primary:hover {
    background-color: #3c41a0;
    border-color: #3c41a0;
}

.btn-outline-secondary {
    transition: all 0.2s ease-in-out;
}

.how-to-use {
    background-color: #ffffff;
}

.how-to-use .list-group-item {
    background-color: transparent;
    border-color: #e9ecef;
    padding-left: 0;
}

/* 숫자 입력 필드의 화살표 제거 */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type=number] {
  -moz-appearance: textfield;
}