:root {
            --bg: #0b1a2a;
            --card: #162a41;
            --accent: #4cc9f0;
            --text: #1FD1D1;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .container {
            background: var(--card);
            padding: 2.5rem;
            border-radius: 16px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.4);
            width: 90%;
            max-width: 650px;
            text-align: center;
        }
        h1 { color: var(--accent); margin-top: 0; font-size: 1.4rem; letter-spacing: 1px; }
        .display-area {
            background: rgba(0,0,0,0.3);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            font-size: 1.3rem;
            font-weight: 600;
            word-break: break-all;
            border: 1px solid #2a415a;
            color: #fff;
            min-height: 1.5em;
        }
        .controls { display: grid; gap: 12px; text-align: left; }
        .row { display: flex; justify-content: space-between; align-items: center; }
        input[type="range"] { flex: 1; margin-left: 15px; cursor: pointer; }
        select, button {
            padding: 10px;
            border-radius: 6px;
            border: none;
            background: #2a415a;
            color: white;
            font-size: 0.9rem;
        }
        .btn-gen {
            background: var(--accent);
            color: var(--bg);
            font-weight: bold;
            margin-top: 10px;
            cursor: pointer;
            transition: transform 0.1s;
        }
        .btn-gen:active { transform: scale(0.98); }
        .btn-copy { background: #3a506b; cursor: pointer; width: 100%; margin-top: 10px; }
        .status { font-size: 0.8rem; color: #8899aa; margin-bottom: 10px; }