/* ==========================================================================
           1. VARIABLES & GLOBAL STYLES (متطابقة تماماً مع الهوية البصرية لموقعك)
           ========================================================================== */
        :root {
            --text-dark: #0f172a;
            --text-light: #ffffff;
            --text-muted-light: rgba(255, 255, 255, 0.75);
            --panel-bg: rgba(30, 41, 59, 0.85); 
            --border-color: rgba(255, 255, 255, 0.15);
            --accent-emerald: #0eb4a0;
            --accent-charcoal: #0f172a; 
        }

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

        body {
            font-family: 'Tajawal', 'Urbanist', sans-serif;
            color: var(--text-light);
            min-height: 100vh;
            overflow-x: hidden;
            background: linear-gradient(180deg,
                #e6fffb 0%,   
                #b2f5ea 25%,
                #4fd1c5 60%,
                #0eb4a0 85%,
                #007a74 100%  
            );
            background-attachment: fixed; 
        }

        .page-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        /* ==========================================================================
           2. HEADER (التصميم الزجاجي المعتمد لقائمة التصفح العلوية)
           ========================================================================== */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 45px;
            padding: 20px 40px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: 24px;
            backdrop-filter: blur(15px);
            box-shadow: 0 12px 35px rgba(0, 0, 0, 0.05);
        }

        .nav-logo {
            font-size: 1.3rem;
            font-weight: 900;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo i {
            color: var(--accent-emerald);
        }

        .nav-links {
            display: flex;
            gap: 25px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: #475569;
            font-size: 1.05rem;
            font-weight: 700;
            transition: color 0.3s ease;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--accent-emerald);
        }

        /* ==========================================================================
           3. PAGE MAIN TITLE
           ========================================================================== */
        .page-main-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .page-main-title h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: #0f172a;
            letter-spacing: -1px;
            margin-bottom: 10px;
            text-shadow: 0 2px 10px rgba(255, 255, 255, 0.4);
        }

        .page-main-title p {
            font-size: 1.2rem;
            color: #1e293b;
            font-weight: 600;
        }

        /* ==========================================================================
           4. PROJECTS GRID & GLASS CARDS
           ========================================================================== */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }

        .project-glass-card {
            background: var(--panel-bg);
            border: 2px solid var(--border-color);
            border-radius: 28px;
            padding: 25px;
            backdrop-filter: blur(20px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            position: relative;
        }

        .project-glass-card:hover {
            transform: translateY(-8px);
            border-color: var(--accent-emerald); 
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            background: rgba(15, 23, 42, 0.95); 
        }

        /* حاوية الصور المجهزة لمنع قص الأطراف وإظهارها كاملة */
        .project-img-wrapper {
            width: 100%;
            height: 230px;
            border-radius: 18px;
            overflow: hidden;
            border: 2px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 20px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
            background: rgba(15, 23, 42, 0.5); 
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .project-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: contain; 
            transition: transform 0.5s ease;
        }

        .project-glass-card:hover .project-img-wrapper img {
            transform: scale(1.04);
        }

        .project-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
            border-bottom: 2px solid rgba(14, 180, 160, 0.3);
            padding-bottom: 10px;
        }

        .project-card-header i {
            font-size: 22px;
            color: #b2f5ea; 
        }

        .project-card-header h2 {
            font-size: 1.35rem;
            font-weight: 800;
            color: #ffffff;
        }

        .project-description {
            font-size: 1.05rem;
            color: var(--text-muted-light);
            line-height: 1.7;
            font-weight: 500;
            margin-bottom: 25px;
            flex-grow: 1;
        }

        /* حاوية الأزرار التفاعلية أسفل الكارت */
        .project-actions-container {
            display: flex;
            flex-direction: column;
            gap: 10px;
            width: 100%;
        }

        .project-action-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 12px;
            background: #ffffff;
            border: 1px solid #ffffff;
            border-radius: 14px;
            color: #000000;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            cursor: pointer;
            text-decoration: none;
        }

        .project-img-wrapper, .zoom-trigger-btn {
            cursor: pointer;
        }

        /* زر عرض وتحميل ملف المشروع الـ PDF */
        .project-file-btn {
            background: transparent;
            border: 2px solid var(--accent-emerald);
            color: #ffffff;
        }

        .project-glass-card:hover .zoom-trigger-btn {
            background: var(--accent-emerald);
            border-color: var(--accent-emerald);
            color: #ffffff;
            box-shadow: 0 12px 25px rgba(14, 180, 160, 0.4);
        }

        .project-glass-card:hover .project-file-btn {
            background: rgba(14, 180, 160, 0.15);
            color: #b2f5ea;
            border-color: #b2f5ea;
        }

        /* ==========================================================================
           5. LIGHTBOX OVERLAY SYSTEM (نظام التكبير والزووم من ملفاتك)
           ========================================================================== */
        .lightbox-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(12px);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 2000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.4s ease;
            padding: 20px;
        }

        .lightbox-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .lightbox-content {
            max-width: 90%;
            max-height: 85vh;
            position: relative;
        }

        .lightbox-content img {
            max-width: 100%;
            max-height: 85vh;
            border-radius: 20px;
            box-shadow: 0 25px 60px rgba(0,0,0,0.5);
            border: 3px solid rgba(255, 255, 255, 0.1);
        }

        .lightbox-close {
            position: absolute;
            top: -25px;
            right: -25px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 2100;
        }

        .lightbox-close:hover {
            background: var(--accent-emerald);
            border-color: var(--accent-emerald);
            transform: scale(1.1);
        }

        /* ==========================================================================
           6. BACK NAVIGATION & FOOTER
           ========================================================================== */
        .back-navigation {
            display: flex;
            justify-content: center;
            margin-top: 20px;
            margin-bottom: 20px;
        }

        .back-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 35px;
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            color: #ffffff;
            text-decoration: none;
            font-weight: 700;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        .back-home-btn:hover {
            background: #0f172a;
            border-color: var(--accent-emerald);
            transform: scale(1.03);
        }

        footer {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 40px;
        }

        footer p {
            font-size: 0.95rem;
            color: #0f172a;
            font-weight: 700;
        }

        @media (max-width: 992px) {
            .projects-grid { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
        }

        @media (max-width: 768px) {
            header { flex-direction: column; gap: 15px; padding: 15px 20px; border-radius: 20px; }
            .nav-links { gap: 15px; }
            .page-main-title h1 { font-size: 2.4rem; }
            .projects-grid { grid-template-columns: 1fr; gap: 20px; }
            .project-glass-card { padding: 20px; border-radius: 22px; }
            .lightbox-close { top: -60px; right: 0; }
        }