/* 테크니컬코리아 문서 시스템 CSS */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 헤더 스타일 */
.header {
    text-align: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 30px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    font-size: 1.2rem;
    color: #666;
    opacity: 0.8;
}

/* 메인 콘텐츠 */
.main-content {
    flex: 1;
    margin-bottom: 30px;
}

/* 카드 그리드 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

/* 카드 스타일 */
.card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #333;
}

.card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.card-link {
    display: inline-block;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    text-decoration: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.card-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 검색 카드 특별 스타일 */
.search-card {
    grid-column: 1 / -1;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-box button {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.search-box button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 문서 목록 스타일 */
.document-list {
    display: grid;
    gap: 20px;
}

.document-item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.document-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.document-icon {
    font-size: 2rem;
    width: 60px;
    text-align: center;
}

.document-content {
    flex: 1;
}

.document-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: #333;
}

.document-content p {
    color: #666;
    font-size: 0.9rem;
}

.document-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.document-date {
    font-size: 0.8rem;
    color: #999;
}

.download-btn {
    background: #28a745;
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #218838;
    transform: translateY(-2px);
}

/* 네비게이션 브레드크럼 */
.breadcrumb {
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.breadcrumb a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: #999;
    margin: 0 10px;
}

/* 페이지 헤더 */
.page-header {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 30px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.page-header h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 푸터 */
.footer {
    background: rgba(255, 255, 255, 0.9);
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    margin-top: auto;
}

.footer p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.footer p:last-child {
    margin-bottom: 0;
    font-family: 'Courier New', monospace;
    color: #999;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 25px 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .card {
        padding: 25px 20px;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .search-box button {
        width: 100%;
    }
    
    .document-item {
        flex-direction: column;
        text-align: center;
    }
    
    .document-meta {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    .card h3 {
        font-size: 1.2rem;
    }
}

/* 로딩 애니메이션 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 알림 메시지 */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.9);
    border-left: 5px solid #667eea;
    backdrop-filter: blur(10px);
}

.alert-success {
    border-left-color: #28a745;
}

.alert-warning {
    border-left-color: #ffc107;
}

.alert-error {
    border-left-color: #dc3545;
}