/* ============================================
   계산기 페이지 공통 스타일시트
   (3개 계산기 모두 공유)
   ============================================ */

/* ========== 기본 리셋 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', sans-serif;
    background: linear-gradient(135deg, #1a365d 0%, #2d5a8e 100%);
    min-height: 100vh;
    padding: 2rem;
    color: #333;
}

/* ========== 컨테이너 ========== */
.container {
    max-width: 900px;
    margin: 0 auto;
}

/* ========== 뒤로가기 링크 ========== */
.back-link {
    color: white;
    text-decoration: none;
    margin-bottom: 2rem;
    display: inline-block;
    font-weight: 500;
    transition: opacity 0.3s;
}

.back-link:hover {
    opacity: 0.8;
}

/* ========== 헤더 ========== */
.calc-header {
    background-color: white;
    padding: 2rem;
    border-radius: 10px 10px 0 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.calc-header h1 {
    font-size: 2rem;
    color: #1a365d;
    margin-bottom: 0.5rem;
}

.calc-header p {
    color: #666;
    font-size: 1rem;
}

/* ========== 메인 레이아웃 (좌: 입력 / 우: 결과) ========== */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 10px 10px;
    overflow: hidden;
    background-color: white;
}

.input-section {
    padding: 2rem;
    background-color: #f9f9f9;
    border-right: 1px solid #ecf0f1;
}

.result-section {
    padding: 2rem;
    background-color: white;
}

/* ========== 폼 요소 ========== */
.form-group {
    margin-bottom: 1.75rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-wrapper input,
.input-wrapper select {
    flex-grow: 1;
    padding: 0.75rem;
    border: 2px solid #ecf0f1;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
    background-color: white;
}

.input-wrapper input:focus,
.input-wrapper select:focus {
    outline: none;
    border-color: #1a365d;
}

.currency-symbol,
.percent-symbol {
    font-weight: bold;
    color: #1a365d;
    font-size: 1rem;
    flex-shrink: 0;
}

.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ecf0f1;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    background-color: white;
    transition: border-color 0.3s;
}

.form-group select:focus {
    outline: none;
    border-color: #1a365d;
}

.info-text {
    font-size: 0.83rem;
    color: #888;
    margin-top: 0.35rem;
}

/* ========== 슬라이더 ========== */
.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, #1a365d 0%, #d4af37 100%);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    margin-top: 0.5rem;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #1a365d;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #1a365d;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: #aaa;
    margin-top: 0.3rem;
}

/* ========== 카테고리 구분선 ========== */
.cost-category {
    background-color: #eef2f7;
    padding: 0.6rem 0.75rem;
    margin: 1.25rem 0 1rem;
    border-radius: 5px;
    font-weight: 700;
    color: #1a365d;
    font-size: 0.88rem;
    border-left: 3px solid #1a365d;
}

/* ========== 결과 박스 (상단 강조) ========== */
.result-box {
    background: linear-gradient(135deg, #1a365d 0%, #d4af37 100%);
    color: white;
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.result-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.result-subtext {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* ========== 상세 분석 박스 ========== */
.breakdown {
    background-color: #f9f9f9;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
}

.breakdown h3 {
    font-size: 0.95rem;
    color: #1a365d;
    margin-bottom: 1rem;
    font-weight: 700;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    border-bottom: 1px solid #ecf0f1;
}

.breakdown-item:last-child {
    border-bottom: none;
}

.breakdown-label {
    color: #666;
    font-size: 0.93rem;
}

.breakdown-value {
    font-weight: 600;
    color: #1a365d;
    font-size: 0.93rem;
}

.total-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0 0;
    margin-top: 0.5rem;
    border-top: 2px solid #d4af37;
    font-weight: bold;
    color: #b8860b;
}

/* ========== 팁 박스 ========== */
.tips-box {
    background-color: #e8f4f8;
    border-left: 4px solid #3498db;
    padding: 1rem 1.25rem;
    border-radius: 5px;
    margin-top: 1.25rem;
}

.tips-box h4 {
    color: #1a365d;
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.tips-box p {
    color: #555;
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ========== 정보 강조 박스 ========== */
.highlight-box {
    background-color: #fff3cd;
    border-left: 4px solid #d4af37;
    padding: 1rem 1.25rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}

.highlight-box h4 {
    color: #1a365d;
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.highlight-box p {
    color: #666;
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ========== 버튼 ========== */
.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-reset,
.btn-download {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.btn-reset {
    background-color: #ecf0f1;
    color: #1a365d;
}

.btn-reset:hover {
    background-color: #bdc3c7;
}

.btn-download {
    background-color: #d4af37;
    color: #1a365d;
}

.btn-download:hover {
    background-color: #b8860b;
    color: white;
}

/* ========== 하단 비교/정보 테이블 섹션 ========== */
.extra-section {
    background-color: white;
    padding: 2rem;
    margin-top: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.extra-section h2 {
    color: #1a365d;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.93rem;
}

.comparison-table th {
    background-color: #1a365d;
    color: white;
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #ecf0f1;
    color: #444;
}

.comparison-table tbody tr:hover {
    background-color: #f5f7fa;
}

/* ========== 비용 설명 그리드 ========== */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 2rem;
}

.info-grid-item h3 {
    color: #1a365d;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.info-grid-item p {
    color: #666;
    line-height: 1.6;
    font-size: 0.92rem;
}

/* ========== 반응형 ========== */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .calc-header h1 {
        font-size: 1.5rem;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .input-section {
        border-right: none;
        border-bottom: 1px solid #ecf0f1;
    }

    .result-value {
        font-size: 2rem;
    }

    .button-group {
        flex-direction: column;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .calc-header h1 {
        font-size: 1.3rem;
    }

    .result-value {
        font-size: 1.8rem;
    }
}