body {
            background-color: #1f1f1f;
            color: #f1f1f1;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            animation: fadeIn 1s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* Navigation Bar */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #333;
            color: #f1f1f1;
            padding: 10px 20px;
            transition: background-color 0.3s ease;
        }

        nav:hover {
            background-color: #444;
        }

        nav ul {
            display: flex;
            list-style: none;
        }

        nav ul li {
            margin: 0 15px;
            transition: transform 0.3s ease;
        }

        nav ul li:hover {
            transform: translateY(-3px);
        }

        nav ul li a {
            text-decoration: none;
            color: #f1f1f1;
            font-weight: bold;
        }

        /* Main Content */
        .check-section {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            margin-top: 50px;
        }

        .check-section h1 {
            font-size: 2rem;
            margin-bottom: 20px;
            color: #ffa07a;
            animation: slideIn 0.5s ease-in-out;
        }

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

        input[type="password"] {
            padding: 10px;
            font-size: 1.2rem;
            margin-bottom: 20px;
            border-radius: 5px;
            border: 2px solid #555;
            background-color: #333;
            color: #f1f1f1;
            transition: border-color 0.3s ease;
        }

        input[type="password"]:focus {
            border-color: #ffa07a;
        }

        .check-btn {
            padding: 10px 20px;
            background-color: #ffa07a;
            color: #1f1f1f;
            border: none;
            border-radius: 5px;
            font-size: 1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s;
        }

        .check-btn:hover {
            background-color: #ff7f50;
            transform: scale(1.05);
        }

        /* Password Strength Indicator */
        .strength-bar {
            width: 100%;
            max-width: 400px;
            height: 10px;
            background-color: #555;
            border-radius: 5px;
            margin: 10px 0;
            overflow: hidden;
        }

        .strength-bar div {
            height: 100%;
            width: 0%;
            background-color: green;
            transition: width 0.3s ease;
        }

        .strength-text {
            font-size: 1.2rem;
            margin-top: 10px;
            color: #ffa07a;
        }

        /* Footer */
        footer {
            background-color: #333;
            color: #f1f1f1;
            text-align: center;
            padding: 10px;
            margin-top: auto;
        }