@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600;700&display=swap');
        
        body {
            font-family: 'IBM Plex Mono', monospace;
            letter-spacing: -0.02em;
            opacity: 1;
            transition: background-color 0.2s ease, color 0.2s ease;
        }
        
        ::-webkit-scrollbar {
            width: 8px;
        }
        
        ::-webkit-scrollbar-track {
            background: #f2f7f5;
        }
        
        .dark ::-webkit-scrollbar-track {
            background: #111;
        }
        
        ::-webkit-scrollbar-thumb {
            background: #ddd;
            border-radius: 0;
        }
        
        .dark ::-webkit-scrollbar-thumb {
            background: #333;
        }
        
        .raised-shadow {
            box-shadow: 0.4rem 0.4rem 0 #ccc;
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }
        
        .dark .raised-shadow {
            box-shadow: 0.4rem 0.4rem 0 #222;
        }
        
        .raised-shadow:hover {
            transform: translate(0.1rem, 0.1rem);
            box-shadow: 0.2rem 0.2rem 0 #ccc;
        }
        
        .dark .raised-shadow:hover {
            box-shadow: 0.2rem 0.2rem 0 #222;
        }
        
        .theme-toggle-btn {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1000;
            width: 50px;
            height: 50px;
            border-radius: 0;
            border: 2px solid #222;
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0.3rem 0.3rem 0 #ccc;
            transition: all 0.2s ease;
        }
        
        .dark .theme-toggle-btn {
            background: #000;
            border: 2px solid #333;
            box-shadow: 0.3rem 0.3rem 0 #222;
        }
        
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border: 2px solid #222;
            font-size: 0.75rem;
            font-weight: 500;
            background: #f2f7f5;
        }
        
        .dark .badge {
            border: 2px solid #333;
            background: #111;
        }
        
        input, input:focus {
            border: 2px solid #333 !important;
            background: transparent !important;
            padding: 0.75rem !important;
            border-radius: 0 !important;
            outline: none !important;
            color: #333 !important;
            transition: border-color 0.2s ease;
        }
        
        .dark input {
            border-color: #fff !important;
            color: #fff !important;
        }
        
        .shorten-btn {
            border: 2px solid #333;
            padding: 0.75rem 2rem;
            font-weight: 600;
            background: transparent;
            box-shadow: 0.3rem 0.3rem 0 #ccc;
            transition: all 0.2s ease;
            color: #333;
            cursor: pointer;
        }
        
        .dark .shorten-btn {
            border-color: #fff;
            box-shadow: 0.3rem 0.3rem 0 #222;
            color: #fff;
        }
        
        .shorten-btn:hover:not(:disabled) {
            transform: translate(0.1rem, 0.1rem);
            box-shadow: 0.2rem 0.2rem 0 #ccc;
        }
        
        .dark .shorten-btn:hover:not(:disabled) {
            box-shadow: 0.2rem 0.2rem 0 #222;
        }
        
        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        .animate-spin {
            animation: spin 1s linear infinite;
        }
        
        #errorNotification {
            border-width: 2px;
            position: relative;
            border-radius: 0;
        }
        
        .shorten-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
            box-shadow: 0.2rem 0.2rem 0 #ccc;
        }
        
        .dark .shorten-btn:disabled {
            box-shadow: 0.2rem 0.2rem 0 #222;
        }
        
        input:invalid:not(:placeholder-shown) {
            border-color: #dc2626 !important;
        }
        
        .dark input:invalid:not(:placeholder-shown) {
            border-color: #f87171 !important;
        }
        
        #closeErrorBtn {
            background: none;
            border: none;
            cursor: pointer;
            padding: 0 5px;
            transition: opacity 0.2s ease;
        }
        
        #closeErrorBtn:hover {
            opacity: 0.7;
        }
        
        .fade-in {
            animation: fadeIn 0.3s ease-in;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .space-error {
            border-color: #f59e0b !important;
        }
        
        .dark .space-error {
            border-color: #fbbf24 !important;
        }
        
        /* Perbaikan Loading Overlay */
        #loadingOverlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
            backdrop-filter: blur(3px);
        }
        
        #loadingOverlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        #loadingOverlay .loading-content {
            background: #fff;
            border: 3px solid #333;
            padding: 2rem;
            box-shadow: 0.6rem 0.6rem 0 #ccc;
            text-align: center;
            max-width: 300px;
            width: 90%;
            transform: scale(0.9);
            transition: transform 0.3s ease;
        }
        
        .dark #loadingOverlay .loading-content {
            background: #000;
            border-color: #fff;
            box-shadow: 0.6rem 0.6rem 0 #222;
            color: #fff;
        }
        
        #loadingOverlay.active .loading-content {
            transform: scale(1);
        }
        
        .loading-spinner {
            width: 60px;
            height: 60px;
            border: 4px solid #333;
            border-top-color: transparent;
            border-radius: 50%;
            margin: 0 auto 1rem;
            animation: spin 1s linear infinite;
        }
        
        .dark .loading-spinner {
            border-color: #fff;
            border-top-color: transparent;
        }
        
        .loading-text {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .loading-subtext {
            font-size: 0.8rem;
            opacity: 0.7;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }