/* Google Fonts: Pretendard */
:root {
    --primary-color: #1A1C1E;
    --primary-hover: #333639;
    --bg-main: #FFFFFF;
    --bg-section: #F8F9FA;
    --border-color: #E5E7EB;
    --text-main: #111827;
    --text-sub: #6B7280;
    --accent: #2563EB;
    --error: #EF4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.calculator-container {
    width: 100%;
    max-width: 600px;
    background: var(--bg-main);
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.calc-header {
    padding: 30px 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo-area h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.logo-area p {
    color: var(--text-sub);
    font-size: 14px;
}

.notice-box {
    margin-top: 16px;
    background-color: var(--bg-section);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-sub);
    border: 1px solid var(--border-color);
}

.calc-body {
    padding: 24px;
}

.calc-section {
    margin-bottom: 32px;
}

.calc-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.required {
    color: var(--error);
}

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

.input-wrapper input,
.select-box {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    outline: none;
    transition: all 0.2s ease;
    background-color: #fff;
    font-family: inherit;
}

.input-wrapper input:focus,
.select-box:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 28, 30, 0.1);
}

.currency {
    position: absolute;
    right: 16px;
    color: var(--text-main);
    font-weight: 500;
}

.input-wrapper input {
    padding-right: 40px;
    text-align: right;
    font-weight: 600;
}

small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-sub);
}

/* Radio & Checkbox Styles */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.radio-btn,
.checkbox-btn {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.2s;
    background-color: #fff;
    font-weight: 500;
}

.radio-btn:hover,
.checkbox-btn:hover {
    background-color: var(--bg-section);
}

.radio-btn input[type="radio"],
.checkbox-btn input[type="checkbox"] {
    margin-right: 12px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Button */
.btn-primary {
    width: 100%;
    padding: 16px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    font-family: inherit;
    margin-bottom: 24px;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

/* Result Section */
.result-section {
    background-color: var(--bg-section);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
}

.hidden {
    display: none;
}

.result-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
}

.tax-detail {
    color: var(--text-sub);
    font-size: 14px;
}

.deduction-detail {
    color: var(--accent);
}

.divider {
    border: none;
    border-top: 1px dashed var(--border-color);
    margin: 8px 0;
}

.total {
    font-size: 18px;
    font-weight: 700;
    margin-top: 8px;
}

.highlight {
    color: var(--primary-color);
    font-size: 22px;
}

/* Responsive */
@media (max-width: 480px) {
    body {
        padding: 0;
    }

    .calculator-container {
        border-radius: 0;
        border: none;
        box-shadow: none;
    }
}