:root {
            /* --- Dark Theme (Vortexa Purple) --- */
            --bg-color: #0b0d14;
            --bg-pattern: radial-gradient(circle at 10% 10%, rgba(124, 58, 237, 0.08) 0%, transparent 40%),
                          radial-gradient(circle at 90% 90%, rgba(59, 130, 246, 0.08) 0%, transparent 40%);
            --glass: rgba(25, 20, 40, 0.6);
            --glass-border: rgba(139, 92, 246, 0.15);
            --text: #ffffff;
            --text-muted: #a78bfa;
            --card-shadow: 0 4px 6px rgba(0,0,0,0.4);
            --header-bg: rgba(11, 13, 20, 0.9);
            
            /* ألوان الخطة الاسترشادية (غامق) */
            --acc-bg: rgba(0,0,0,0.2);
            --semester-bg: rgba(25, 20, 40, 0.5);
            
            /* Colors */
            --col-comp: #fd6900;  
            --maj-req: #8b5cf6;   
            --maj-elec: #d946ef;  
            --uni-req: #06b6d4;   
            --success: #10b981;   
            --danger: #ef4444;
            --vortexa-glow: #8b5cf6;
        }

        /* --- Light Theme --- */
        [data-theme="light"] {
            --bg-color: #f8fafc;
            --bg-pattern: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
            --glass: rgba(255, 255, 255, 0.9);
            --glass-border: rgba(139, 92, 246, 0.2);
            --text: #1e293b;
            --text-muted: #64748b;
            --card-shadow: 0 4px 15px rgba(139, 92, 246, 0.05);
            --header-bg: rgba(255, 255, 255, 0.95);
            
            /* ألوان الخطة الاسترشادية (فاتح) */
            --acc-bg: rgba(139, 92, 246, 0.03);
            --semester-bg: rgba(255, 255, 255, 0.7);

            --col-comp: #ff5900; 
            --maj-req: #7c3aed;  
            --maj-elec: #c026d3; 
            --uni-req: #0891b2;
            --vortexa-glow: #7c3aed;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; outline: none; -webkit-tap-highlight-color: transparent; }

        html, body {
            overflow-x: hidden; 
            max-width: 100vw;
        }

        body {
            background-color: var(--bg-color);
            background-image: var(--bg-pattern);
            font-family: 'Tajawal', sans-serif;
            color: var(--text);
            transition: background 0.4s ease, color 0.4s ease;
            padding-bottom: 80px;
        }

        /* --- Header --- */
        header {
            padding: 15px 5%;
            background: var(--header-bg);
            border-bottom: 1px solid var(--glass-border);
            position: sticky; top: 0; z-index: 1000;
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            transition: 0.4s;
            box-shadow: 0 4px 20px rgba(139, 92, 246, 0.1);
        }
        
        .header-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
        
        .brand-area { display: flex; flex-direction: column; }
        .logo-text { font-size: 1.5rem; font-weight: 900; letter-spacing: 1px; color: var(--text); text-transform: uppercase; }
        .logo-text span { 
            background: linear-gradient(135deg, #8b5cf6, #d946ef);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
        }
        .quote-text { font-size: 0.7rem; color: var(--text-muted); margin-top: 2px; font-style: italic; }

        .controls { display: flex; gap: 10px; }
        
        .btn-icon {
            background: var(--glass); color: var(--text); border: 1px solid var(--glass-border);
            width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
            cursor: pointer; transition: 0.3s;
        }
        .btn-icon:hover { transform: translateY(-2px); border-color: var(--vortexa-glow); box-shadow: 0 0 10px var(--glass-border); }
        .reset-btn { color: var(--danger); border-color: rgba(239, 68, 68, 0.3); }

        /* Progress Bar */
        .progress-wrapper { position: relative; width: 100%; height: 10px; background: rgba(128,128,128,0.1); border-radius: 20px; overflow: hidden; margin-top: 15px;}
        .progress-bar {
            height: 100%; background: linear-gradient(90deg, var(--maj-req), var(--maj-elec));
            width: 0%; border-radius: 20px; transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            box-shadow: 0 0 10px var(--maj-req);
        }
        .progress-label { 
            position: absolute; left: 5px; top: -20px; font-size: 0.8rem; 
            color: var(--text-muted); font-weight: bold; 
        }
        .progress-val { float: left; color: var(--success); font-weight: 900;}

        /* --- Legend --- */
        .legend {
            display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; 
            font-size: 0.7rem; padding: 8px; background: rgba(128,128,128,0.05); border-radius: 6px;
        }
        .legend-item { display: flex; align-items: center; gap: 5px; color: var(--text-muted); }
        .dot { width: 8px; height: 8px; border-radius: 50%; box-shadow: 0 0 5px currentColor; }

        /* --- Main Layout --- */
        .container { padding: 20px 5%; max-width: 1400px; margin: 0 auto; display: flex; flex-direction: column; gap: 50px; }

        .section-title { 
            font-size: 1.3rem; margin-bottom: 20px; color: var(--text); 
            display: flex; align-items: center; gap: 10px;
            padding-bottom: 10px; border-bottom: 2px solid var(--glass-border);
        }
        .section-title i { color: var(--maj-elec); background: rgba(139, 92, 246, 0.1); padding: 8px; border-radius: 8px; }

        .tree-scroll-area { 
            overflow-x: auto; padding: 20px 10px 50px 10px; 
            background: var(--glass); 
            border-radius: 16px; 
            border: 1px solid var(--glass-border);
            -webkit-overflow-scrolling: touch; 
        }
        
        .plan-grid { display: flex; gap: 60px; min-width: max-content; align-items: flex-start; }
        .level-column { display: flex; flex-direction: column; gap: 20px; min-width: 170px; width: 170px; position: relative; }
        .level-header { 
            text-align: center; color: var(--text-muted); font-size: 0.75rem; 
            font-weight: 800; text-transform: uppercase; letter-spacing: 1px; 
            background: rgba(139, 92, 246, 0.1); padding: 5px; border-radius: 6px;
        }

        /* --- Course Cards (Links) --- */
        a.course-card {
            text-decoration: none !important; 
            color: var(--text) !important;    
            display: flex;                    
            flex-direction: column; align-items: center; justify-content: center; text-align: center;
            
            background: var(--glass);
            border: 1px solid var(--glass-border);
            padding: 12px;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            z-index: 10;
            min-height: 85px;
            user-select: none;
            opacity: 0.5; filter: grayscale(60%);
            box-shadow: var(--card-shadow);
        }

/* Glowing Borders */
.type-college { 
    border-right: 4px solid var(--col-comp) !important; 
    box-shadow: inset -6px 0 15px -5px rgba(249, 115, 22, 0.4); 
}
.type-major-req { 
    border-right: 4px solid var(--maj-req) !important; 
    box-shadow: inset -6px 0 15px -5px rgba(139, 92, 246, 0.4);
}
.type-major-elec { 
    border-right: 4px solid var(--maj-elec) !important; 
    box-shadow: inset -6px 0 15px -5px rgba(217, 70, 239, 0.4);
}
.uni-card { 
    border-right: 4px solid var(--uni-req) !important; 
    box-shadow: inset -6px 0 15px -5px rgba(6, 182, 212, 0.4);
    opacity: 1; filter: grayscale(0); 
}

        .check-circle {
            position: absolute; top: 6px; left: 6px; width: 22px; height: 22px;
            border-radius: 50%; border: 2px solid var(--text-muted);
            background: rgba(0,0,0,0.3);
            display: flex; align-items: center; justify-content: center;
            font-size: 11px; color: transparent; transition: 0.3s;
            cursor: pointer;
            z-index: 20; 
        }
        .check-circle:hover { transform: scale(1.1); border-color: var(--text); }

        .course-card h4 { font-size: 0.85rem; margin-bottom: 4px; line-height: 1.3; font-weight: 600; pointer-events: none;}
        .course-card span { font-size: 0.65rem; color: var(--text-muted); font-family: monospace; pointer-events: none; }

        .elec-badge {
            position: absolute; top: -8px; right: 8px; background: var(--maj-elec);
            color: #fff; font-size: 0.6rem; padding: 2px 5px; border-radius: 4px;
            font-weight: bold; box-shadow: 0 0 5px var(--maj-elec);
        }

        /* States */
        .course-card.is-unlocked {
            opacity: 1; filter: grayscale(0%);
            border-color: var(--text-muted);
            transform: translateY(0);
        }
        
        @media(hover: hover) {
            .course-card.is-unlocked:hover { 
                transform: translateY(-3px); 
                border-color: var(--vortexa-glow); 
                box-shadow: 0 8px 20px rgba(139, 92, 246, 0.2);
            }
        }
        
        .course-card.is-completed {
            opacity: 1; filter: grayscale(0%);
            background: rgba(16, 185, 129, 0.1);
            border-color: var(--success) !important;
            box-shadow: inset 0 0 15px rgba(16, 185, 129, 0.2) !important;
        }
        .course-card.is-completed .check-circle {
            background: var(--success); border-color: var(--success); color: #fff;
            box-shadow: 0 0 8px var(--success);
        }
        .course-card.is-completed h4 { opacity: 0.7; }

        /* Shake */
        .shake-anim { animation: shake 0.3s ease-in-out; border-color: var(--danger) !important; }
        @keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

        /* Toast */
        #toast-container { position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2000; width: 90%; max-width: 400px; text-align: center; pointer-events: none; }
        .toast {
            background: #1e1e1e; border-right: 4px solid var(--danger);
            color: #fff; padding: 12px 20px; border-radius: 8px;
            margin-top: 10px; opacity: 0; transition: 0.4s;
            transform: translateY(20px); box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            font-size: 0.9rem; display: inline-block;
        }
        .toast.show { opacity: 1; transform: translateY(0); }

        .uni-req-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }

        /* --- تعديلات الهواتف المحمولة والأجهزة اللوحية (Tablet & Mobile) --- */
        @media (max-width: 768px) {
            .container { padding: 15px 3%; gap: 30px; }
            .plan-grid { gap: 70px; } 
            .level-column { min-width: 140px; width: 140px; gap: 12px; }
            a.course-card { padding: 10px; min-height: 75px; border-radius: 8px; }
            .course-card h4 { font-size: 0.75rem; margin-bottom: 2px; }
            .course-card span { font-size: 0.6rem; }
            .uni-req-container { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
            
            .acc-header { padding: 12px 15px; }
            .acc-title { font-size: 0.95rem; }
            .semester-grid { padding: 15px; gap: 15px; }
            .semester-header { font-size: 0.95rem; padding: 10px; }
            .plan-table td { padding: 8px 10px; font-size: 0.8rem; }
            .plan-table td:nth-child(2) { font-size: 0.75rem; }
            .note-wrapper { padding: 0 15px 15px 15px; }
        }

        /* --- تعديلات مخصصة للشاشات الصغيرة جداً --- */
        @media (max-width: 400px) {
            .header-top { flex-direction: column; align-items: flex-start; gap: 10px; }
            .controls { align-self: flex-end; margin-top: -35px; }
            .logo-text { font-size: 1.2rem; }
            .level-column { min-width: 120px; width: 120px; }
            .course-card h4 { font-size: 0.7rem; }
            .uni-req-container { grid-template-columns: repeat(auto-fill, minmax(105px, 1fr)); gap: 8px; }
            .plan-table td { padding: 6px 8px; font-size: 0.75rem; }
            .plan-table td:nth-child(2) { font-size: 0.7rem; }
        }

        /* --- Guidance Plan (Grid + Tables) --- */
        .accordion-container { max-width: 1200px; margin: 0 auto; width: 100%; }
        .acc-item { margin-bottom: 20px; border: 1px solid var(--glass-border); border-radius: 12px; overflow: hidden; background: var(--glass); }
        
        .acc-header {
            padding: 18px 25px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(139, 92, 246, 0.08);
            transition: 0.3s;
        }
        .acc-header:hover { background: rgba(139, 92, 246, 0.15); }
        .acc-title { font-weight: 900; color: var(--text); display: flex; align-items: center; gap: 12px; font-size: 1.1rem; }
        .acc-icon { transition: 0.3s; font-size: 1.2rem;}
        
        .acc-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.6s ease-in-out;
            background: var(--acc-bg);
        }

        .semester-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
            padding: 25px;
        }
        
        @media (max-width: 900px) {
            .semester-grid { grid-template-columns: 1fr; }
        }

        .semester-wrapper {
            background: var(--semester-bg);
            border: 1px solid var(--glass-border);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
        }
        .semester-header {
            background: linear-gradient(90deg, rgba(139, 92, 246, 0.2), rgba(217, 70, 239, 0.1));
            color: var(--maj-req);
            text-align: center;
            padding: 12px;
            font-weight: 800;
            border-bottom: 1px solid var(--glass-border);
            font-size: 1.05rem;
            letter-spacing: 0.5px;
        }

        .plan-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
        .plan-table td { padding: 12px 15px; border-bottom: 1px solid var(--glass-border); color: var(--text-muted); text-align: right; }
        .plan-table tr:last-child td { border-bottom: none; }
        .plan-table td:nth-child(2) { text-align: left; font-weight: 700; color: var(--text); font-size: 0.85rem;}
        
        /* Highlight specific rows */
        .note-wrapper {
            padding: 0 25px 25px 25px;
        }

        /* Active State for Accordion */
        .acc-item.active .acc-content { max-height: 1500px; }
        .acc-item.active .acc-icon { transform: rotate(180deg); color: var(--maj-req); }