:root {
    --primary-color: #3a7bd5;
    --primary-light: #5e97f6;
    --primary-dark: #0d47a1;
    --secondary-color: #ffd100;
    --secondary-dark: #ffb300;
    --background-color: #f8f9fd;
    --card-color: #ffffff;
    --text-color: #323232;
    --text-secondary: #6d6d6d;
    --border-color: #e9ecef;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --border-radius: 12px;
    --input-radius: 8px;
    --button-radius: 8px;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    font-weight: 400;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* 헤더 스타일 */
.app-header {
    margin-bottom: 2rem;
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.2rem;
    font-weight: 700;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.header-nav {
    display: flex;
    gap: 1rem;
}

.nav-icon {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.nav-icon:hover {
    background-color: var(--primary-light);
    color: white;
}

/* 메인 컨텐츠 영역 */
.main-content {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

/* 카드 공통 스타일 */
.card {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.3rem;
    color: var(--text-color);
    font-weight: 600;
}

.card-content {
    padding: 1.5rem;
}

/* 옵션 선택기 스타일 */
.option-selector {
    display: flex;
    border-radius: var(--input-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.option-btn {
    flex: 1;
    padding: 0.8rem;
    background-color: var(--card-color);
    border: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.option-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* 아코디언 스타일 */
.accordion {
    border: 1px solid var(--border-color);
    border-radius: var(--input-radius);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--card-color);
    cursor: pointer;
}

.accordion-header h3 {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 500;
    margin: 0;
}

.accordion-content {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--background-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.accordion-header i {
    transition: transform 0.3s ease;
}

.accordion-header.active i {
    transform: rotate(180deg);
}

/* 입력 필드 스타일 */
.input-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--input-radius);
    font-size: 1rem;
    background-color: var(--card-color);
}

input:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(94, 151, 246, 0.2);
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 0;
}

.hidden-costs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.toggle-option {
    display: inline-flex;
    border-radius: var(--input-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-top: 0.5rem;
}

.weekly-pay-btn {
    padding: 0.6rem 1rem;
    background-color: var(--card-color);
    border: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.weekly-pay-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* 버튼 스타일 */
.button-group {
    display: flex;
    gap: 1.5rem;
    margin: 1.5rem 0;
    justify-content: flex-start;
}

.primary-btn, .secondary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: var(--button-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.secondary-btn {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

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

.secondary-btn:disabled {
    background-color: #e0e0e0;
    color: #9e9e9e;
    cursor: not-allowed;
}

/* 결과 카드 스타일 */
.result-cards, .summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.result-card, .summary-card {
    background-color: transparent;
    border-radius: var(--input-radius);
    text-align: center;
    position: relative;
}

.result-card.highlight, .summary-card.highlight {
    background-color: #e6f3ff;
    border: 1px solid #b3d9ff;
}

.result-icon, .summary-icon {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-card h3, .summary-card h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.result-card p, .summary-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.result-card p span, .summary-card p span {
    font-weight: 600;
    color: var(--primary-color);
}

/* 테이블 스타일 */
.records-table-container {
    overflow-x: auto;
    margin-bottom: 1rem;
}

.records-table {
    width: 100%;
    border-collapse: collapse;
}

.records-table th,
.records-table td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.records-table th {
    background-color: var(--background-color);
    font-weight: 500;
    color: var(--text-secondary);
}

.records-table tr:hover {
    background-color: var(--background-color);
}

/* 버튼 스타일 */
.delete-btn, .delete-rate-btn {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 0.4rem 0.7rem;
    border-radius: var(--button-radius);
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 0.3rem;
}

.edit-btn, .edit-activity-btn, .edit-rate-btn, .select-rate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.4rem 0.7rem;
    border-radius: var(--button-radius);
    font-size: 0.8rem;
    cursor: pointer;
}

.save-edit-btn, .save-activity-btn, .save-rate-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.4rem 0.7rem;
    border-radius: var(--button-radius);
    font-size: 0.8rem;
    cursor: pointer;
}

.cancel-edit-btn, .cancel-activity-btn, .cancel-rate-btn {
    background-color: #9e9e9e;
    color: white;
    border: none;
    padding: 0.4rem 0.7rem;
    border-radius: var(--button-radius);
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 0.3rem;
}

/* 필터 버튼 스타일 */
.filter-controls {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--button-radius);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 세전/세후 선택 스타일 */
.tax-option-selector {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tax-option-selector label {
    display: flex;
    align-items: center;
    margin-right: 1rem;
    cursor: pointer;
}

.tax-option-selector input[type="radio"] {
    margin-right: 0.3rem;
    width: auto;
    padding: 0;
}

.tax-option-selector label:first-child {
    margin-right: 0.5rem;
    font-weight: 500;
}

/* 기타 스타일 */
.calculated-info {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--primary-dark);
    font-weight: 500;
    padding: 0.6rem;
    background-color: var(--background-color);
    border-radius: var(--input-radius);
    display: inline-block;
}

.no-records {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 0;
    font-weight: 300;
}

.hidden {
    display: none;
}

/* 선택된 시급 행 강조 */
tr.selected-rate {
    background-color: rgba(58, 123, 213, 0.1);
}

tr.selected-rate td {
    border-left: 4px solid var(--primary-color);
}

/* 푸터 스타일 */
.app-footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 300;
}

/* 반응형 스타일 */
@media (min-width: 768px) {
    .main-content {
        grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    }
    
    .wage-calculator, .saved-rates-container, .time-tracker, .time-records, .money-to-time {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .filter-controls {
        width: 100%;
    }
    
    .button-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .result-cards, .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .header-nav {
        width: 100%;
        justify-content: flex-start;
    }
}

/* 섹션 컨테이너 스타일 */
.section-container {
    margin-top: 2rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.section-container h3 {
    padding: 1rem;
    margin: 0;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    font-size: 1.1rem;
    color: #495057;
}

.section-content {
    padding: 1rem;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-card {
    background: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.summary-card.highlight {
    background: #e6f3ff;
    border-color: #b3d9ff;
}

.summary-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #4a90e2;
}

.summary-card h3 {
    font-size: 0.9rem;
    color: #6c757d;
    margin: 0.5rem 0;
}

.summary-card p {
    font-size: 1.2rem;
    font-weight: 600;
    color: #212529;
    margin: 0;
}

.records-table-container {
    overflow-x: auto;
    margin-top: 1rem;
}

.records-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.records-table th,
.records-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.records-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
}

.records-table tr:hover {
    background: #f8f9fa;
}

.no-records {
    text-align: center;
    padding: 2rem;
    color: #6c757d;
    font-style: italic;
}

/* 섹션 타이틀 스타일 */
.section-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 2rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.input-group.hidden-costs {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.input-group.hidden-costs .input-container {
    flex: 1;
    min-width: 200px;
}

@media (max-width: 768px) {
    .input-group.hidden-costs .input-container {
        flex: 1 1 100%;
    }
}

#convert-btn, #add-activity-btn {
    margin: 1.5rem 0;
    display: block;
}