:root {
            --primary-bg: #0F172A;
            --secondary-bg: #1E293B;
            --card-bg: #1E293B;
            --sidebar-bg: #111827;
            --text-primary: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted-custom: #64748B;
            --accent-color: #FACC15;
            --accent-gradient: linear-gradient(to right, #FACC15, #FBBF24);
            --primary-button-bg: #3B82F6;
            --border-color: #334155;
            --success-color: #10B981;
            --danger-color: #EF4444;
            --warning-color: #F59E0B;
            --info-color: #60A5FA;
            --link-color: #9CA3AF;
            --link-hover-color: #E5E7EB;
            --placeholder-bg: rgba(100, 116, 139, 0.15);
        }
        body { background-color: var(--primary-bg); color: var(--text-primary); font-family: 'Poppins', sans-serif; padding-top: 60px; }
        .app-header { position: fixed; top: 0; left: 0; width: 100%; height: 60px; background-color: var(--secondary-bg); display: flex; align-items: center; justify-content: space-between; padding: 0 15px; box-shadow: 0 2px 5px rgba(0,0,0,0.2); z-index: 1030; border-bottom: 1px solid var(--border-color); }
        .header-left { display: flex; align-items: center; gap: 10px; }
        .menu-toggle-btn { background: none; border: none; color: var(--text-primary); font-size: 1.5rem; padding: 0 5px; margin-left: -5px; }
        .header-logo { width: 35px; height: 35px; border-radius: 50%; background-color: #fff; object-fit: cover; border: 1px solid var(--accent-color); }
        .header-title { font-size: 1rem; font-weight: 600; line-height: 1.2; }
        .header-right { display: flex; align-items: center; gap: 15px; }
        .staff-email-header { font-size: 0.8rem; color: var(--text-secondary); display: none; }
        @media (min-width: 576px) { .staff-email-header { display: inline; } }
        .offcanvas-start { background-color: var(--sidebar-bg); color: var(--link-color); width: 260px !important; border-right: 1px solid var(--border-color); }
        .offcanvas-header { border-bottom: 1px solid var(--border-color); padding: 1rem 1.2rem; }
        .offcanvas-title h5 { color: var(--text-primary); margin-bottom: 0; font-size: 1.1rem; }
        .btn-close-white { filter: invert(1) grayscale(100%) brightness(200%); }
        .offcanvas-body { padding: 0; display: flex; flex-direction: column; height: calc(100% - 56px); }
        .offcanvas-body .nav { flex-grow: 1; overflow-y: auto; }
        .offcanvas-body .nav-link { color: var(--link-color); padding: 0.8rem 1.2rem; border-left: 3px solid transparent; font-size: 0.95rem; display: flex; align-items: center; }
        .offcanvas-body .nav-link.active, .offcanvas-body .nav-link:hover { color: var(--link-hover-color); background-color: rgba(255,255,255,0.05); border-left-color: var(--accent-color); }
        .offcanvas-body .nav-link i { margin-right: 12px; width: 20px; text-align: center; font-size: 1.1rem; }
        .main-content { padding: 20px; }
        .section { display: none; animation: fadeIn 0.4s; }
        .section.active { display: block; }
        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
        #staffLoader { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); display: none; justify-content: center; align-items: center; z-index: 9999; }
        .spinner-border { color: var(--accent-color); }
        .login-container { max-width: 400px; margin: 10vh auto; }
        .card { background-color: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-primary); margin-bottom: 1.5rem; }
        .card-title { color: var(--text-primary); }
        .table-responsive { overflow-x: auto; }
        .table { background-color: var(--card-bg); color: var(--text-primary); border-color: var(--border-color); margin-bottom: 0; }
        .table > :not(caption) > * > * { background-color: transparent !important; border-bottom-color: var(--border-color); }
        .table th { color: var(--text-secondary); font-weight: 500; white-space: nowrap; padding: 0.8rem 1rem; }
        .table td { vertical-align: middle; white-space: nowrap; padding: 0.7rem 1rem; }
        .table td .text-muted { color: var(--text-muted-custom) !important; }
        .table-hover > tbody > tr:hover > * { background-color: rgba(255,255,255,0.03) !important; }
        .action-buttons button { margin-right: 5px; margin-bottom: 5px; }
        .modal-content { background-color: var(--secondary-bg); color: var(--text-primary); border: 1px solid var(--border-color); }
        .modal-header { border-bottom-color: var(--border-color); }
        .modal-footer { border-top-color: var(--border-color); }
        .modal-body label { margin-bottom: 0.5rem; font-weight: 500; color: var(--text-secondary); }
        .form-control, .form-select { background-color: var(--primary-bg); color: var(--text-primary); border: 1px solid var(--border-color); }
        .form-control:focus, .form-select:focus { background-color: var(--primary-bg); color: var(--text-primary); border-color: var(--accent-color); box-shadow: 0 0 0 0.2rem rgba(250,204,21,0.25); }
        .form-control::placeholder { color: var(--text-secondary); opacity: 0.7; }
        .form-control:disabled, .form-select:disabled { background-color: #2d3748; opacity: 0.7; }
        .form-control[type="file"] { background-color: var(--primary-bg); color: var(--text-secondary); }
        .image-upload-status { display: none; margin-top: 5px; font-size: 0.85rem; color: var(--text-secondary); }
        .table img.preview-img { max-width: 60px; height: 40px; object-fit: cover; border-radius: 4px; border: 1px solid var(--border-color); }
        .text-bg-primary { background-color: #3B82F6 !important; }
        .text-bg-info { background-color: #0ea5e9 !important; }
        .text-bg-warning { background-color: #f59e0b !important; }
        .text-bg-success { background-color: #10b981 !important; }
        .text-bg-danger { background-color: #ef4444 !important; }
        .text-bg-secondary { background-color: #6b7280 !important; }
        .nav-tabs .nav-link { color: var(--text-secondary); border-color: var(--border-color); border-bottom-color: transparent; margin-bottom: -1px; }
        .nav-tabs .nav-link.active { color: var(--accent-color); background-color: var(--card-bg); border-color: var(--border-color); border-bottom-color: var(--card-bg); font-weight: 600; }
        .nav-tabs { border-bottom-color: var(--border-color); }
        textarea.form-control { min-height: 120px; }
        .status-badge { font-size: 0.8em; padding: 0.3em 0.6em; border-radius: 0.25rem; }
        .loading-placeholder td > div { background-color: var(--placeholder-bg); border-radius: 4px; min-height: 1.2em; animation: placeholder-glow 2s ease-in-out infinite; }
        @keyframes placeholder-glow { 0% { background-color: var(--placeholder-bg); } 50% { background-color: rgba(100,116,139,0.2); } 100% { background-color: var(--placeholder-bg); } }
        .dash-card-icon { font-size: 1.8rem; opacity: 0.6; position: absolute; right: 15px; top: 50%; transform: translateY(-50%); }
        .card-body { position: relative; }
        #tmsPlayerListContainer .form-control { width: 80px; padding: 0.25rem 0.5rem; font-size: 0.9rem; text-align: center; }
        #tmsPlayerListContainer .calculated-prize { font-weight: 600; color: var(--accent-color); min-width: 80px; text-align: center; }
        #themeSettingsForm .color-input-group { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 6px; background-color: var(--primary-bg); margin-bottom: 10px; }
        #themeSettingsForm .color-input-group label { flex-grow: 1; margin-bottom: 0; font-size: 0.9rem; color: var(--text-secondary); }
        #themeSettingsForm input[type="color"] { -webkit-appearance: none; -moz-appearance: none; appearance: none; width: 40px; height: 40px; background-color: transparent; border: 1px solid var(--border-color); border-radius: 50%; cursor: pointer; }
        #themeSettingsForm input[type="color"]::-webkit-color-swatch { border-radius: 50%; border: none; }
        #themeSettingsForm input[type="color"]::-moz-color-swatch { border-radius: 50%; border: none; }
        .theme-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
        .theme-actions { display: flex; gap: 10px; flex-wrap: wrap; border-top: 1px solid var(--border-color); padding-top: 1.5rem; margin-top: 1.5rem; }
        .staff-badge { background: var(--accent-gradient); color: #111; font-size: 0.7rem; padding: 2px 8px; border-radius: 20px; font-weight: 600; letter-spacing: 0.5px; margin-left: 6px; vertical-align: middle; }