* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
        }

        body {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #333;
        }

        /* Header */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 5%;
            background: rgb(155, 155, 155);
            backdrop-filter: blur(10px);
            color: white;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }

        .github-link {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: opacity 0.3s;
        }

        .github-link:hover {
            opacity: 0.8;
        }

        .github-icon {
            width: 32px;
            height: 32px;
            filter: brightness(0) invert(1);
        }

        /* Main content */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2rem 5%;
            max-width: 800px;
            margin: 0 auto;
            width: 100%;
        }

        .disclaimer {
            text-align: center;
            color: white;
            margin: 2rem 0;
            font-size: 1.2rem;
            background: rgba(155, 255, 178, 0.2);
            padding: 1rem 2rem;
            backdrop-filter: blur(5px);
        }

        /* Form */
        .url-form {
            width: 100%;
            background: white;
            padding: 2rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            margin: 2rem 0;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .url-input {
            width: 100%;
            padding: 1.2rem;
            font-size: 1.1rem;
            border: 3px solid #e0e0e0;
            transition: border-color 0.3s;
            outline: none;
        }

        .url-input:focus {
            border-color: #667eea;
        }

        .url-input.error {
            border-color: #ff4444;
        }

        .error-message {
            color: #ff4444;
            font-size: 0.9rem;
            margin-top: 0.5rem;
            min-height: 1.2rem;
        }

        /* Checkbox */
        .checkbox-wrapper {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .checkbox-wrapper input[type="checkbox"] {
            width: 20px;
            height: 20px;
            cursor: pointer;
        }

        .checkbox-wrapper label {
            font-size: 1.1rem;
            color: #555;
            cursor: pointer;
        }

        .alias-input {
            width: 100%;
            padding: 1rem;
            font-size: 1rem;
            border: 2px solid #e0e0e0;
            margin-top: 0.5rem;
            display: none;
        }

        .alias-input.visible {
            display: block;
        }

        .alias-input:focus {
            border-color: #667eea;
            outline: none;
        }

        /* Button */
        .submit-btn {
            width: 100%;
            padding: 1.2rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: white;
            background: linear-gradient(135deg, #00b09b, #96c93d);
            border: none;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 176, 155, 0.4);
        }

        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Result */
        .result-section {
            width: 100%;
            background: white;
            padding: 2rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            margin: 2rem 0;
            display: none;
        }

        .result-section.visible {
            display: block;
        }

        .result-title {
            font-size: 1.2rem;
            color: #666;
            margin-bottom: 1rem;
        }

        .result-box {
            display: flex;
            gap: 1rem;
            align-items: center;
            background: #f5f5f5;
            padding: 1rem;
        }

        .short-url {
            flex: 1;
            font-size: 1.2rem;
            color: #667eea;
            word-break: break-all;
        }

        .copy-btn {
            padding: 0.8rem 1.5rem;
            background: #667eea;
            color: white;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
            white-space: nowrap;
        }

        .copy-btn:hover {
            background: #5a67d8;
        }

        .copy-btn.copied {
            background: #48bb78;
        }

        /* Info section */
        .info-section {
            background: rgba(255, 255, 255, 0.95);
            padding: 2rem;
            margin: 2rem 0;
            width: 100%;
        }

        .info-section h2 {
            color: #667eea;
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }

        .info-section ul {
            list-style-type: none;
        }

        .info-section li {
            margin: 1rem 0;
            padding-left: 1.5rem;
            position: relative;
            color: #555;
        }

        .info-section li:before {
            content: "✓";
            color: #48bb78;
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* Footer */
        .footer {
            background: rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
            padding: 1.5rem;
            text-align: center;
            color: white;
        }

        .contacts-link {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.3s;
        }

        .contacts-link:hover {
            border-bottom-color: white;
        }

        /* Loader */
        .loader {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f3f3;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 0.5rem;
        }

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

        /* Responsive */
        @media (max-width: 600px) {
            .header {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }

            .logo {
                font-size: 1.4rem;
            }

            .disclaimer {
                font-size: 1rem;
                padding: 0.8rem;
            }

            .result-box {
                flex-direction: column;
            }

            .copy-btn {
                width: 100%;
            }
        }