:root {
            --bg-color: #f9f7f2; 
            --accent-blue: #a0c4e8; 
            --dark-text: #0d1b2a; 
            --glass-white: rgba(255, 255, 255, 0.8);
        }

        body {
            margin: 0; padding: 0;
            font-family: 'Inter', -apple-system, sans-serif;
            background-color: var(--dark-text);
            color: var(--dark-text);
            display: flex; justify-content: center; align-items: center;
            min-height: 100vh; overflow-x: hidden;
        }

        .main-container {
            width: 90%; max-width: 900px;
            background: var(--glass-white);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(0,0,0,0.1);
            border-radius: 32px; padding: 60px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.05);
            text-align: center;
        }

        h1 { font-size: 3rem; font-weight: 900; text-transform: uppercase; letter-spacing: -2px; margin: 0; }
        .subtitle { font-size: 1.1rem; color: #666; margin-bottom: 40px; }
        .subtitle a { color: var(--dark-text); text-decoration: none; font-weight: bold; }

        .input-wrapper { display: flex; flex-direction: column; gap: 20px; text-align: left; }
        .text-box {
            width: 100%; min-height: 130px; padding: 25px;
            background: #fff; border: 2px solid var(--dark-text);
            border-radius: 20px; font-size: 1.3rem; box-sizing: border-box;
            outline: none; transition: 0.3s; resize: none;
        }

        .output-box { background-color:  #fff; color: var(--dark-text); font-size: 1.6rem; word-break: break-word; }

        .copy-btn {
            margin-top: 30px; padding: 18px 50px; font-size: 1.1rem; font-weight: 700;
            background: var(--dark-text); color: #fff; border: none;
            border-radius: 50px; cursor: pointer; transition: 0.3s;
        }