:root {
            --instagram-purple: #833AB4;
            --instagram-pink: #C13584;
            --instagram-orange: #F77737;
            --instagram-yellow: #FCAF45;
        }

        body {
            background-color: #FFFFFF;
        }

        .text-instagram {
            background: linear-gradient(45deg, var(--instagram-purple), var(--instagram-pink), var(--instagram-orange), var(--instagram-yellow));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .btn-instagram {
            background: linear-gradient(45deg, var(--instagram-purple), var(--instagram-pink), var(--instagram-orange), var(--instagram-yellow));
            border: none;
            color: white;
        }

        .btn-instagram:hover {
            background: linear-gradient(45deg, var(--instagram-yellow), var(--instagram-orange), var(--instagram-pink), var(--instagram-purple));
            color: white;
        }

        .btn-group-vertical>.btn:not(:last-child) {
            margin-bottom: 0.5rem;
        }

        .card-body h6 {
            margin-top: 0.5rem;
            margin-bottom: 0.5rem;
        }

        .progress {
            width: 100%;
            margin-bottom: 0;
        }

        .progress-bar {
            width: 0%;
            transition: width 0.3s ease;
            background: linear-gradient(45deg, var(--instagram-purple), var(--instagram-pink), var(--instagram-orange), var(--instagram-yellow));
        }

        .navbar {
            padding: 10px 0;
        }

        .btn-nav {
            color: white;
            background: linear-gradient(45deg, var(--instagram-purple), var(--instagram-pink));
            border: 1px solid white;
            margin: 0 5px;
            transition: all 0.3s ease;
        }

        .btn-nav:hover, .btn-nav.active {
            background: white;
            color: var(--instagram-pink);
        }

        .btn-nav .bi {
            margin-right: 4px;
        }

        .username-result {
            padding: 1rem;
            border-radius: 0.5rem;
            margin: 0.5rem 0;
        }

        .available {
            background: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
        }

        .unavailable {
            background: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }

        .suggestion-pill {
            display: inline-block;
            background: linear-gradient(45deg, var(--instagram-purple), var(--instagram-pink));
            color: white;
            padding: 0.25rem 0.75rem;
            margin: 0.25rem;
            border-radius: 50px;
            text-decoration: none;
            font-size: 0.875rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .suggestion-pill:hover {
            background: linear-gradient(45deg, var(--instagram-yellow), var(--instagram-orange));
            color: white;
            text-decoration: none;
            transform: translateY(-1px);
        }

        .username-input {
            font-family: monospace;
        }

        /* Responsive button sizing */
        @media (max-width: 768px) {
            .btn-nav {
                padding: 8px 12px;
                font-size: 13px;
                margin: 0 3px;
            }

            #pasteButton, #clearButton {
                padding: 10px 12px !important;
                font-size: 12px !important;
            }

            #checkButton {
                padding: 10px 18px !important;
                font-size: 14px !important;
            }
        }

        @media (max-width: 480px) {
            .navbar .btn-group {
                flex-wrap: nowrap;
                gap: 4px;
                justify-content: center;
                width: 100%;
            }

            .btn-nav {
                display: flex;
                flex-direction: column;
                align-items: center;
                gap: 0px;
                padding: 3px 6px;
                margin: 0;
                font-size: 9px;
                border-radius: 8px !important;
                flex: 1 1 0;
                min-width: 0;
            }

            .btn-nav .bi {
                font-size: 14px;
                margin-right: 0;
                line-height: 1;
            }

            .btn-nav span {
                white-space: normal;
                word-break: keep-all;
                text-align: center;
                line-height: 1.2;
            }

            h1 {
                font-size: clamp(1.2rem, 4.5vw, 2rem);
            }

            h1 + p {
                font-size: clamp(0.75rem, 2.5vw, 1rem);
            }

            #pasteButton, #clearButton {
                padding: 8px 10px !important;
                font-size: 11px !important;
            }

            #checkButton {
                padding: 8px 14px !important;
                font-size: 13px !important;
            }
        }

        /* Captcha Modal Styles */
        .captcha-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .captcha-modal-content {
            background-color: #ffffff;
            border-radius: 12px;
            padding: 2rem;
            max-width: 500px;
            width: 90%;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            text-align: center;
            position: relative;
            animation: modalSlideIn 0.3s ease-out;
        }

        @keyframes modalSlideIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .captcha-modal-header h5 {
            color: #000000;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .captcha-modal-header p {
            color: #666;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }

        .captcha-modal-body {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        /* Responsive modal */
        @media (max-width: 480px) {
            .captcha-modal-content {
                padding: 1.5rem;
                margin: 1rem;
            }
        }