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

/* 전역 변수 */
:root {
    --primary-color: #2c5aa0;
    --secondary-color: #f8d7da;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #2c3e50;
    --text-light: #6c757d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #dee2e6;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* 기본 스타일 */
body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 헤더 */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
}

.logo h1 a {
    text-decoration: none;
    color: inherit;
}

.logo i {
    color: var(--accent-color);
    margin-right: 0.5rem;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* 히어로 섹션 */
.hero {
    display: flex;
    align-items: center;
    min-height: 80vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 1.5rem 3rem;
    font-size: 1.1rem;
}

/* 섹션 공통 스타일 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* About 섹션 */
.about {
    padding: 6rem 0;
    background: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 통계 섹션 */
.stats {
    padding: 4rem 0;
    background: var(--primary-color);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 최근 활동 섹션 */
.recent-activities {
    padding: 6rem 0;
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.activity-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.activity-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.activity-content {
    padding: 1.5rem;
}

.activity-category {
    display: inline-block;
    background: var(--secondary-color);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.activity-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.activity-description {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.activity-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 후원 정보 섹션 */
.donation-info {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #2c5aa0 100%);
    color: white;
    text-align: center;
}

.donation-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.donation-content p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.donation-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.method {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.method i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.method h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.method p {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* 연락처 섹션 */
.contact {
    padding: 6rem 0;
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.contact-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.contact-item p {
    color: var(--text-light);
}

/* 폼 스타일 */
.contact-form h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* 푸터 */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid #495057;
    padding-top: 1rem;
    text-align: center;
    color: #bdc3c7;
}

/* 페이지 헤더 */
.page-header {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 활동 페이지 스타일 */
.activities-filter {
    padding: 2rem 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.filter-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-categories {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

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

.search-box {
    display: flex;
    gap: 0.5rem;
}

.search-box input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    min-width: 250px;
}

.search-box button {
    padding: 0.75rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.activities-list {
    padding: 4rem 0;
}

/* 모달 스타일 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.modal-content {
    position: relative;
    background: white;
    max-width: 800px;
    width: 90%;
    margin: 2rem auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.modal-body {
    padding: 2rem;
}

.modal-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

/* 후원 페이지 특별 스타일 */
.donation-header {
    background: linear-gradient(135deg, var(--accent-color) 0%, #c0392b 100%);
}

.donation-methods-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.donation-methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.method-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.method-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.method-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.method-benefits {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.benefit {
    background: var(--secondary-color);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* 후원 폼 스타일 */
.donation-form-section {
    padding: 4rem 0;
}

.donation-form-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.form-header {
    background: var(--primary-color);
    color: white;
    padding: 2rem;
    text-align: center;
}

.donation-form {
    padding: 2rem;
}

.form-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.form-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.donation-type-tabs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.type-tab {
    flex: 1;
    padding: 1rem 2rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    min-width: 150px;
}

.donation-type-tabs input[type="radio"] {
    display: none;
}

.donation-type-tabs input[type="radio"]:checked + .type-tab {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.amount-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.amount-btn {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.amount-options input[type="radio"] {
    display: none;
}

.amount-options input[type="radio"]:checked + .amount-btn {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.custom-amount {
    margin-top: 1rem;
}

.custom-amount input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.volunteer-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.checkbox-label:hover {
    background: var(--bg-light);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 3px;
    margin-right: 1rem;
    position: relative;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.form-actions {
    text-align: center;
    margin-top: 2rem;
}

/* 계좌 정보 */
.account-info {
    padding: 4rem 0;
    background: var(--bg-light);
}

.account-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.account-card h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.account-details {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.account-item {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 1.1rem;
    font-weight: 600;
}

.bank {
    color: var(--primary-color);
}

.account-number {
    color: var(--accent-color);
    font-family: monospace;
}

/* FAQ */
.faq-section {
    padding: 4rem 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: var(--bg-light);
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: #e9ecef;
}

.faq-question h3 {
    margin: 0;
    color: var(--primary-color);
}

.faq-answer {
    padding: 1.5rem;
    background: white;
    border-top: 1px solid var(--border-color);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

/* 플로팅 버튼 */
.floating-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.add-activity-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-hover);
    transition: var(--transition);
}

.add-activity-btn:hover {
    background: #c0392b;
    transform: scale(1.1);
}

/* 페이지네이션 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination button {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.pagination button:hover,
.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 로딩 및 빈 상태 */
.loading,
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.loading i,
.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 텍스트 유틸리티 */
.text-center {
    text-align: center;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-list {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .donation-type-tabs {
        flex-direction: column;
    }
    
    .type-tab {
        min-width: auto;
    }
    
    .amount-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box input {
        min-width: auto;
    }
    
    .floating-btn {
        bottom: 1rem;
        right: 1rem;
    }
    
    .add-activity-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .amount-options {
        grid-template-columns: 1fr;
    }
    
    .volunteer-options {
        grid-template-columns: 1fr;
    }
}