.project-header {
        padding: 60px 0;
        background-color: #2c3e50;
        color: white;
        text-align: center;
        position: relative;
    }
    
    .project-header-with-image {
        padding: 0;
        position: relative;
        height: 400px;
        overflow: hidden;
    }
    
    .project-header-with-image .header-image {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 1;
    }
    
    .project-header-with-image .header-content {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 2;
        background: rgba(0, 0, 0, 0.6);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 30px;
    }
    
    .project-title {
        font-weight: 800;
        margin-bottom: 20px;
        font-size: 2.5rem;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    }
    
    .project-meta {
        font-weight: 300;
        margin-bottom: 10px;
        font-size: 1.2rem;
    }
    
    .status-badge {
        position: absolute;
        top: 20px;
        right: 20px;
        padding: 8px 16px;
        border-radius: 30px;
        font-weight: 600;
        z-index: 3;
    }
    
    .status-waiting {
        background-color: #f39c12;
        color: white;
    }
    
    .status-in-progress {
        background-color: #3498db;
        color: white;
    }
    
    .status-completed {
        background-color: #2ecc71;
        color: white;
    }
    
    .status-rejected {
        background-color: #e74c3c;
        color: white;
    }
    
    .project-content {
        padding: 50px 0;
    }
    
    .content-section {
        margin-bottom: 40px;
        border-radius: 10px;
        padding: 30px;
        background-color: white;
        box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
    }

    .content-section img {
        width: 100%;
        height: auto;
        max-height: 600px; /* 원하는 세로 최대 높이로 조절 */
        object-fit: contain; /* 이미지를 안 잘리게 비율 유지 */
        display: block;
        margin: 0 auto;
        border-radius: 8px;
        background-color: #000; /* 투명 이미지 대비 배경 */
    }

    
    .section-title {
        color: #2c3e50;
        font-weight: 700;
        margin-bottom: 20px;
        padding-bottom: 10px;
        border-bottom: 2px solid #f0f0f0;
    }

    /* 파일 카드 스타일 */
    .file-card {
        display: flex;
        align-items: center;
        padding: 15px;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        background-color: #f8f9fa;
        transition: all 0.3s;
        height: 100%;
    }

    .file-card:hover {
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        border-color: #3498db;
    }

    .file-icon {
        font-size: 2.5rem;
        margin-right: 15px;
        flex-shrink: 0;
    }

    .file-info {
        flex: 1;
        min-width: 0;
    }

    .file-name {
        font-weight: 600;
        color: #2c3e50;
        margin-bottom: 10px;
        word-break: break-word;
    }

    .file-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
    }

    /* 미리보기 모달 스타일 */
    .preview-modal .modal-dialog {
        max-width: 90%;
        height: 90vh;
    }

    .preview-modal .modal-content {
        height: 100%;
    }

    .preview-modal .modal-body {
        padding: 0;
        height: calc(100% - 120px);
    }

    .preview-modal iframe {
        width: 100%;
        height: 100%;
        border: none;
    }
    
    .info-item {
        margin-bottom: 15px;
    }
    
    .info-label {
        font-weight: 600;
        color: #7f8c8d;
    }
    
    .tech-tag {
        display: inline-block;
        background-color: #3498db;
        color: white;
        padding: 5px 10px;
        border-radius: 20px;
        margin-right: 8px;
        margin-bottom: 8px;
        font-size: 0.9rem;
    }
    
    .action-buttons {
        margin-top: 30px;
        text-align: center;
    }
    
    .action-btn {
        padding: 12px 25px;
        border-radius: 30px;
        font-weight: 600;
        margin: 0 10px;
        border: none;
        cursor: pointer;
        transition: all 0.3s;
    }
    
    .primary-btn {
        background: linear-gradient(to right, #3498db, #2980b9);
        color: white;
    }
    
    .primary-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
    }
    
    .secondary-btn {
        background-color: #ecf0f1;
        color: #2c3e50;
    }
    
    .secondary-btn:hover {
        background-color: #dfe6e9;
    }

    .warning-btn {
        background: linear-gradient(to right, #f39c12, #e67e22);
        color: white;
    }

    .warning-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(243, 156, 18, 0.4);
    }

    .danger-btn {
        background: linear-gradient(to right, #e74c3c, #c0392b);
        color: white;
    }

    .danger-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
    }

    .contact-info {
        background-color: #f8f9fa;
        border-left: 4px solid #3498db;
        padding: 15px;
        margin-top: 20px;
    }
    
    .timeline-info {
        display: flex;
        justify-content: space-between;
        margin-top: 15px;
        border-top: 1px dashed #e0e0e0;
        padding-top: 15px;
    }
    
    .timeline-item {
        text-align: center;
    }
    
    .timeline-date {
        font-weight: 600;
        color: #34495e;
    }
    
    .timeline-label {
        font-size: 0.9rem;
        color: #7f8c8d;
    }

    /* 대외비 블러 효과 */
    .confidential-blur {
        filter: blur(10px);
        pointer-events: none;
        user-select: none;
    }

    .confidential-overlay {
        position: relative;
    }

    .confidential-badge {
        background-color: #e74c3c;
        color: white;
        padding: 5px 10px;
        border-radius: 5px;
        font-size: 0.9rem;
        font-weight: 600;
        margin-left: 10px;
    }

    /* 관리자 액션 버튼 (우측 상단) */
    .admin-actions {
        position: absolute;
        top: 80px;
        right: 20px;
        z-index: 4;
        display: flex;
        gap: 10px;
    }

    .admin-action-btn {
        padding: 10px 20px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.9rem;
        border: none;
        cursor: pointer;
        transition: all 0.3s;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }

    .admin-edit-btn {
        background: linear-gradient(to right, #f39c12, #e67e22);
        color: white;
    }

    .admin-edit-btn:hover {
        background: linear-gradient(to right, #e67e22, #d35400);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(243, 156, 18, 0.4);
        color: white;
    }

    .admin-delete-btn {
        background: linear-gradient(to right, #e74c3c, #c0392b);
        color: white;
    }

    .admin-delete-btn:hover {
        background: linear-gradient(to right, #c0392b, #a93226);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(231, 76, 60, 0.4);
    }

    /* 로그인 필요 오버레이 스타일 */
    .login-blur-wrapper {
        position: relative;
    }
    
    .login-blur {
        filter: blur(6px);
        user-select: none;
        pointer-events: none;
    }
    
    .login-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background-color: rgba(255, 255, 255, 0.1);
        z-index: 10;
        text-decoration: none;
        transition: all 0.3s;
    }
    
    .login-overlay:hover {
        background-color: rgba(255, 255, 255, 0.2);
    }
    
    .login-lock-icon {
        font-size: 3rem;
        color: #34495e;
        margin-bottom: 15px;
        filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
    }
    
    .login-message {
        font-size: 1.1rem;
        font-weight: 700;
        color: #2c3e50;
        background: rgba(255, 255, 255, 0.9);
        padding: 10px 25px;
        border-radius: 50px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }