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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
}

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

/* 헤더 */
.main-header {
    background: white;
    color: #333;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
    display: flex;
    align-items: center;
}

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

.nav-menu a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-menu a:hover {
    color: #667eea;
}

/* 메인 컨텐츠 */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
    background: rgba(255, 255, 255, 0.95);
    margin: 0 20px;
    border-radius: 15px;
    margin-top: 20px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
}

/* 히어로 섹션 */
.hero-section {
    text-align: center;
    padding: 3rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    margin-bottom: 3rem;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
}

/* 소개 섹션 */
.intro-section {
    display: grid;
    gap: 2rem;
}

.intro-card {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.intro-card h2 {
    color: #667eea;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.vision-list {
    list-style: none;
    padding-left: 0;
}

.vision-list li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.activity-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.activity-item h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* CTA 섹션 */
.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.cta-section h2 {
    color: white;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.welcome-message {
    font-size: 1.3rem;
    margin-top: 1rem;
    font-weight: 500;
}

/* 버튼 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 게시판 */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    color: #667eea;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.board-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.board-actions {
    text-align: right;
    margin-bottom: 1rem;
}

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

.board-table thead {
    background: #f8f9fa;
}

.board-table th,
.board-table td {
    padding: 1rem;
    border-bottom: 1px solid #dee2e6;
}

.board-table th {
    font-weight: 600;
    color: #495057;
}

.text-center {
    text-align: center;
}

.board-title {
    color: #333;
    text-decoration: none;
}

.board-title:hover {
    color: #667eea;
}

.comment-count {
    color: #667eea;
    margin-left: 5px;
}

.badge {
    padding: 0.3rem 0.6rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-notice {
    background: #dc3545;
    color: white;
}

.badge-success {
    background: #28a745;
    color: white;
}

/* 페이지네이션 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.page-link {
    padding: 0.5rem 1rem;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    text-decoration: none;
    color: #667eea;
}

.page-link:hover,
.page-link.active {
    background: #667eea;
    color: white;
}

/* 게시글 보기 */
.board-view {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.view-header {
    border-bottom: 2px solid #667eea;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.view-header h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.view-meta {
    display: flex;
    gap: 2rem;
    color: #6c757d;
    font-size: 0.95rem;
}

.view-content {
    padding: 2rem 0;
    line-height: 1.8;
    min-height: 300px;
}

.view-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #dee2e6;
}

/* 로그인/회원가입 */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-box {
    background: white;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 450px;
}

.auth-box h1 {
    text-align: center;
    color: #667eea;
    margin-bottom: 2rem;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #495057;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ced4da;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-links {
    text-align: center;
}

.auth-links a {
    color: #667eea;
    text-decoration: none;
}

.auth-links a:hover {
    text-decoration: underline;
}

/* 알림 메시지 */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* 푸터 */
.main-footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.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: #667eea;
}

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

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

.footer-section a {
    color: #cbd5e0;
    text-decoration: none;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: #cbd5e0;
}

/* 반응형 */
@media (max-width: 768px) {
    .nav-menu {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .board-table {
        font-size: 0.9rem;
    }

    .board-table th,
    .board-table td {
        padding: 0.5rem;
    }

    .view-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
}