/* ==========================================================================
           1. CORE DESIGN SYSTEM & GLASSMORPHISM VARIABLES
           ========================================================================== */
        :root {
            /* Brand Color Palette */
            --brand-primary: #3b82f6;
            --brand-primary-hover: #2563eb;
            --brand-accent: #06b6d4;
            --brand-purple: #8b5cf6;
            --brand-emerald: #10b981;
            
            /* Status Colors */
            --status-success: #10b981;
            --status-warning: #f59e0b;
            --status-danger: #ef4444;
            --status-info: #06b6d4;

            /* Dark Glass Theme (Default) */
            --bg-base: #090d16;
            --bg-gradient: radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.15), transparent 45%),
                            radial-gradient(circle at 85% 75%, rgba(139, 92, 246, 0.15), transparent 45%),
                            radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.08), transparent 60%);
            
            --glass-bg: rgba(15, 23, 42, 0.65);
            --glass-bg-hover: rgba(30, 41, 59, 0.75);
            --glass-bg-active: rgba(30, 41, 59, 0.9);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-border-glow: rgba(59, 130, 246, 0.4);
            --glass-shadow: 0 16px 40px 0 rgba(0, 0, 0, 0.37);
            --glass-blur: blur(16px);
            
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-subtle: #64748b;
            
            --input-bg: rgba(15, 23, 42, 0.6);
            --input-border: rgba(255, 255, 255, 0.15);
            --input-focus-border: #3b82f6;
            
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Light Glass Mode */
        body.light-theme {
            --bg-base: #f1f5f9;
            --bg-gradient: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.12), transparent 40%),
                            radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.12), transparent 40%),
                            radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.08), transparent 50%);
            
            --glass-bg: rgba(255, 255, 255, 0.72);
            --glass-bg-hover: rgba(255, 255, 255, 0.88);
            --glass-bg-active: rgba(255, 255, 255, 0.95);
            --glass-border: rgba(255, 255, 255, 0.8);
            --glass-border-glow: rgba(59, 130, 246, 0.5);
            --glass-shadow: 0 12px 32px 0 rgba(31, 38, 135, 0.12);
            
            --text-main: #0f172a;
            --text-muted: #475569;
            --text-subtle: #64748b;
            
            --input-bg: rgba(255, 255, 255, 0.8);
            --input-border: rgba(203, 213, 225, 0.8);
            --input-focus-border: #2563eb;
        }

        /* ==========================================================================
           2. BASE RESETS & LAYOUT
           ========================================================================== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Outfit', sans-serif;
            color: var(--text-main);
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        body {
            background-color: var(--bg-base);
            background-image: var(--bg-gradient);
            background-attachment: fixed;
            color: var(--text-main);
            min-height: 100vh;
            padding-bottom: 60px;
            overflow-x: hidden;
        }

        /* Ambient Glowing Orbs in Background */
        .ambient-orb {
            position: fixed;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            pointer-events: none;
            opacity: 0.5;
        }
        .orb-1 { top: -100px; left: -100px; width: 450px; height: 450px; background: rgba(59, 130, 246, 0.3); }
        .orb-2 { bottom: -150px; right: -100px; width: 500px; height: 500px; background: rgba(139, 92, 246, 0.25); }
        .orb-3 { top: 40%; left: 30%; width: 350px; height: 350px; background: rgba(6, 182, 212, 0.2); }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Showcase Navigation Sub-header */
        .showcase-header {
            margin: 32px 0 24px 0;
            text-align: center;
        }
        .showcase-header p {
            color: var(--text-muted);
            margin-top: 8px;
            font-size: 1.05rem;
        }
        .showcase-badges {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-top: 12px;
        }

        /* Category Nav Tabs */
        .component-tabs {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            padding: 8px;
            margin-bottom: 32px;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            box-shadow: var(--glass-shadow);
        }
        .tab-btn {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 10px 18px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .tab-btn:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }
        .tab-btn.active {
            background: var(--brand-primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
        }

        /* Section Layout */
        .section-title {
            font-size: 1.4rem;
            margin: 40px 0 20px 0;
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--glass-border);
        }
        .section-title i {
            color: var(--brand-primary);
        }

        /* Grid Layouts */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

        @media (max-width: 992px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
        }

        /* ==========================================================================
           3. REDESIGNED COMPONENT STYLES
           ========================================================================== */

        /* --------------------------------------------------------------------------
           A. HEADER & NAVIGATION BAR (<t-header>)
           -------------------------------------------------------------------------- */
        .t-header-glass {
            position: sticky;
            top: 16px;
            z-index: 100;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 12px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--glass-shadow);
        }

        .header-brand {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-brand img.logo-icon {
            height: 42px;
            width: auto;
            filter: drop-shadow(0 2px 8px rgba(59, 130, 246, 0.4));
        }

        .header-user-chip {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-main);
        }
        .header-user-chip .user-avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.75rem;
            color: white;
        }

        .header-nav ul {
            display: flex;
            list-style: none;
            gap: 8px;
            background: rgba(0, 0, 0, 0.15);
            padding: 5px;
            border-radius: var(--radius-full);
            border: 1px solid var(--glass-border);
        }

        .header-nav ul li a {
            text-decoration: none;
            color: var(--text-muted);
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-fast);
        }

        .header-nav ul li a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.08);
        }

        .header-nav ul li.active a {
            background: var(--brand-primary);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .icon-btn-glass {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1rem;
            outline: none;
        }

        .icon-btn-glass:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--brand-primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .icon-btn-glass.logout-btn:hover {
            background: rgba(239, 68, 68, 0.2);
            border-color: var(--status-danger);
            color: var(--status-danger);
        }

        /* --------------------------------------------------------------------------
           B. HERO & BANNER COMPONENTS
           -------------------------------------------------------------------------- */
        .glass-hero {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--glass-shadow);
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
        }

        .glass-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.08));
            pointer-events: none;
        }

        .hero-text h1 {
            font-size: 2.2rem;
            line-height: 1.2;
            margin-bottom: 8px;
            background: linear-gradient(135deg, var(--text-main), var(--brand-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-text p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 540px;
        }

        .hero-banner-img {
            max-height: 90px;
            width: auto;
            filter: drop-shadow(0 4px 16px rgba(59, 130, 246, 0.3));
        }

        /* Search Bar Banner Container */
        .glass-search-bar {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-full);
            padding: 8px 16px 8px 24px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--glass-shadow);
            max-width: 600px;
            margin: 0 auto;
        }
        .glass-search-bar i {
            color: var(--brand-primary);
            font-size: 1.1rem;
        }
        .glass-search-bar input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 1rem;
            width: 100%;
        }
        .glass-search-bar input::placeholder {
            color: var(--text-subtle);
        }

        /* --------------------------------------------------------------------------
           C. CARDS & CARDS GRID (PATIENT, DIAGNOSIS, METRICS)
           -------------------------------------------------------------------------- */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--glass-shadow);
            position: relative;
        }

        .glass-card:hover {
            border-color: var(--glass-border-glow);
            box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.15);
            transform: translateY(-4px);
        }

        .glass-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--glass-border);
        }

        .glass-card-title {
            font-size: 1.15rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .glass-card-title i {
            color: var(--brand-primary);
        }

        /* Metric Data Grid inside Card */
        .patient-data-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .data-item {
            display: flex;
            flex-direction: column;
        }
        .data-label {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-subtle);
            font-weight: 600;
            margin-bottom: 4px;
        }
        .data-value {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
        }

        /* AI Diagnosis Highlight Card */
        .diagnosis-card-glass {
            border-left: 4px solid var(--brand-primary);
        }

        .diagnosis-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 1.1rem;
            font-weight: 700;
            text-transform: capitalize;
            letter-spacing: 0.02em;
            margin: 12px 0;
        }
        .diagnosis-badge.normal {
            background: rgba(16, 185, 129, 0.15);
            color: var(--status-success);
            border: 1px solid rgba(16, 185, 129, 0.3);
        }
        .diagnosis-badge.osteopenia {
            background: rgba(245, 158, 11, 0.15);
            color: var(--status-warning);
            border: 1px solid rgba(245, 158, 11, 0.3);
        }
        .diagnosis-badge.osteoporosis {
            background: rgba(239, 68, 68, 0.15);
            color: var(--status-danger);
            border: 1px solid rgba(239, 68, 68, 0.3);
        }

        .confidence-meter {
            margin-top: 16px;
        }
        .confidence-header {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            margin-bottom: 6px;
            color: var(--text-muted);
        }
        .progress-bar-bg {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-full);
            overflow: hidden;
        }
        .progress-bar-fill {
            height: 100%;
            border-radius: var(--radius-full);
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
        }

        /* Probabilities Mini Table */
        .probs-table {
            width: 100%;
            margin-top: 16px;
            border-collapse: collapse;
            font-size: 0.85rem;
        }
        .probs-table th, .probs-table td {
            padding: 8px 12px;
            text-align: center;
        }
        .probs-table th {
            color: var(--text-subtle);
            font-weight: 600;
            border-bottom: 1px solid var(--glass-border);
        }
        .probs-table td {
            color: var(--text-main);
            font-weight: 600;
        }

        /* --------------------------------------------------------------------------
           D. FORM CONTROLS (INPUTS, SELECTS, RADIO BUTTONS, CHECKBOXES)
           -------------------------------------------------------------------------- */
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-bottom: 20px;
        }

        .form-label {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        .glass-input, .glass-select, .glass-textarea {
            background: var(--input-bg);
            border: 1px solid var(--input-border);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            color: var(--text-main);
            font-size: 0.95rem;
            outline: none;
            width: 100%;
        }

        .glass-input:focus, .glass-select:focus, .glass-textarea:focus {
            border-color: var(--input-focus-border);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
            background: var(--glass-bg-hover);
        }

        .glass-input::placeholder {
            color: var(--text-subtle);
        }

        .glass-select option {
            background-color: var(--bg-base);
            color: var(--text-main);
        }

        /* Custom Glass Radio Pill Group */
        .glass-radio-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .glass-radio-pill {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--input-bg);
            border: 1px solid var(--input-border);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            cursor: pointer;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-muted);
            user-select: none;
        }

        .glass-radio-pill input[type="radio"] {
            accent-color: var(--brand-primary);
            width: 16px;
            height: 16px;
        }

        .glass-radio-pill:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-main);
            transform: translateY(-2px);
        }

        .glass-radio-pill:has(input:checked) {
            background: rgba(59, 130, 246, 0.2);
            border-color: var(--brand-primary);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
        }

        /* File Upload Dropzone */
        .glass-dropzone {
            border: 2px dashed var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px 20px;
            text-align: center;
            cursor: pointer;
            background: rgba(15, 23, 42, 0.3);
            position: relative;
        }

        .glass-dropzone:hover {
            border-color: var(--brand-primary);
            background: rgba(59, 130, 246, 0.05);
        }

        .dropzone-icon {
            font-size: 2.5rem;
            color: var(--brand-primary);
            margin-bottom: 12px;
        }

        .dropzone-text {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .dropzone-subtext {
            font-size: 0.8rem;
            color: var(--text-subtle);
            margin-top: 4px;
        }

        /* --------------------------------------------------------------------------
           E. BUTTONS & ACTIONS
           -------------------------------------------------------------------------- */
        .btn-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            border: 1px solid transparent;
            text-decoration: none;
            outline: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-hover));
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
        }
        .btn-primary:hover {
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
            transform: translateY(-2px);
        }

        .btn-success {
            background: linear-gradient(135deg, var(--brand-emerald), #059669);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
        }
        .btn-success:hover {
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
            transform: translateY(-2px);
        }

        .btn-danger {
            background: linear-gradient(135deg, var(--status-danger), #dc2626);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
        }
        .btn-danger:hover {
            box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--brand-primary);
            transform: translateY(-2px);
        }

        .btn-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* --------------------------------------------------------------------------
           F. DATA TABLES
           -------------------------------------------------------------------------- */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            box-shadow: var(--glass-shadow);
        }

        .glass-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .glass-table th {
            background: rgba(0, 0, 0, 0.2);
            padding: 16px 20px;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            border-bottom: 1px solid var(--glass-border);
        }

        .glass-table td {
            padding: 16px 20px;
            font-size: 0.92rem;
            color: var(--text-main);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .glass-table tbody tr {
            transition: var(--transition-fast);
        }

        .glass-table tbody tr:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .glass-table tbody tr:last-child td {
            border-bottom: none;
        }

        /* Table Action Icon Buttons */
        .table-action-icon {
            color: var(--text-subtle);
            font-size: 1rem;
            padding: 6px;
            border-radius: 6px;
            cursor: pointer;
        }
        .table-action-icon:hover {
            color: var(--status-danger);
            background: rgba(239, 68, 68, 0.15);
        }

        /* --------------------------------------------------------------------------
           G. AI IMAGE PREVIEW & EXPLAINABILITY (GRAD-CAM) VISUALIZER
           -------------------------------------------------------------------------- */
        .image-preview-card {
            background: rgba(0, 0, 0, 0.25);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 16px;
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative;
        }

        .image-preview-card h4 {
            font-size: 1rem;
            margin-bottom: 12px;
            color: var(--text-muted);
        }

        .preview-img-box {
            width: 100%;
            height: 240px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #000000;
            position: relative;
        }

        .preview-img-box img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }

        .heatmap-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 45% 55%, rgba(239, 68, 68, 0.7), rgba(245, 158, 11, 0.5) 40%, rgba(59, 130, 246, 0.2) 70%, transparent);
            mix-blend-mode: color-dodge;
            pointer-events: none;
            border-radius: var(--radius-sm);
        }

        /* --------------------------------------------------------------------------
           H. CLAHE IMAGE ENHANCEMENT CONTROLS
           -------------------------------------------------------------------------- */
        .clahe-control-group {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .range-slider-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .glass-range {
            flex-grow: 1;
            accent-color: var(--brand-primary);
            height: 6px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-full);
            cursor: pointer;
        }

        .range-val-badge {
            background: var(--brand-primary);
            color: white;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 700;
            min-width: 45px;
            text-align: center;
        }

        /* --------------------------------------------------------------------------
           I. MODAL & POPUP COMPONENTS
           -------------------------------------------------------------------------- */
        .glass-modal-backdrop {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-normal);
        }

        .glass-modal-backdrop.active {
            opacity: 1;
            pointer-events: auto;
        }

        .glass-modal-card {
            background: var(--glass-bg-active);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border-glow);
            border-radius: var(--radius-xl);
            padding: 32px;
            width: 90%;
            max-width: 480px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.5);
            text-align: center;
            transform: scale(0.9);
            transition: transform var(--transition-normal);
        }

        .glass-modal-backdrop.active .glass-modal-card {
            transform: scale(1);
        }

        .modal-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.15);
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 16px auto;
        }

        .modal-title {
            font-size: 1.3rem;
            margin-bottom: 8px;
        }

        .modal-body {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 24px;
        }

        /* Loader Spinner */
        .glass-loader {
            width: 48px;
            height: 48px;
            border: 4px solid rgba(255, 255, 255, 0.1);
            border-left-color: var(--brand-primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }