:root {
            --primary-color: #3c5a99;
            --hover-color: #2e4a80;
            --background-color: #f4f4f4;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--background-color);
            position: relative;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        body::before {
            content: "AdminDroid";
            position: absolute;
            font-size: 100px;
            font-weight: 900;
            color: rgba(0, 0, 0, 0.05);
            z-index: 0;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) rotate(-20deg);
            white-space: nowrap;
            pointer-events: none;
            user-select: none;
        }

        .container {
            background-color: white;
            width: 100%;
            max-width: 480px;
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.15);
            display: flex;
            flex-direction: column;
            position: relative;
            z-index: 1;
        }

        .header {
            background-color: var(--primary-color);
            color: white;
            padding: 20px;
            font-size: 22px;
            font-weight: 600;
            text-align: center;
            text-transform: uppercase;
        }

        .tabs {
            display: flex;
            background-color: #f0f0f0;
            border-bottom: 1px solid #ccc;
        }

        .tab {
            flex: 1;
            text-align: center;
            padding: 14px;
            font-weight: 500;
            cursor: pointer;
            border-bottom: 3px solid transparent;
        }

        .tab:hover {
            background-color: #eaeaea;
        }

        .tab.active {
            background-color: white;
            border-bottom: 3px solid var(--primary-color);
            color: var(--primary-color);
        }

        .tab-content {
            display: none;
            padding: 20px;
        }

        .tab-content.active {
            display: block;
        }

        .login-button {
            display: flex;
            flex-direction: row;
            align-items: center;
            justify-content: flex-start;
            padding: 14px 16px;
            margin: 10px 0;
            background-color: var(--primary-color);
            color: white;
            border: none;
            width: 100%;
            text-align: left;
            cursor: pointer;
            transition: background 0.3s;
        }

        .login-button:hover {
            background-color: var(--hover-color);
        }

        .login-button img {
            width: 26px;
            height: 26px;
            margin-right: 14px;
        }

        .login-text {
            display: flex;
            flex-direction: column;
            line-height: 1.4;
        }

        .login-text span:first-child {
            font-size: 16px;
            font-weight: 600;
        }

        .login-text span:last-child {
            font-size: 13px;
            opacity: 0.85;
        }

        @media (max-width: 500px) {
            .container {
                margin: 20px;
                max-width: 100%;
            }

            body::before {
                font-size: 60px;
            }
        }