body {
    background: #0f2027;  /* hacker-style gradient */
    background: linear-gradient(135deg, #2c5364 0%, #0f2027 100%);
    color: #39ff14;
    font-family: 'Fira Mono', 'Consolas', 'Courier New', monospace;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    background: rgba(20, 30, 40, 0.95);
    padding: 32px 24px;
    border-radius: 12px;
    box-shadow: 0 0 32px #000a;
    min-width: 320px;
    max-width: 90vw;
    text-align: center;
}

h1 {
    font-size: 2rem;
    margin-bottom: 18px;
    letter-spacing: 2px;
    color: #39ff14;
    text-shadow: 0 0 8px #39ff14aa;
}

.options, .length {
    margin-bottom: 18px;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 1rem;
}

input[type="number"] {
    width: 60px;
    padding: 4px;
    border-radius: 4px;
    border: none;
    background: #222;
    color: #39ff14;
    font-size: 1rem;
    margin-left: 8px;
}

button {
    background: #39ff14;
    color: #0f2027;
    border: none;
    border-radius: 6px;
    padding: 10px 22px;
    font-size: 1.1rem;
    font-family: inherit;
    cursor: pointer;
    margin-top: 10px;
    margin-bottom: 10px;
    transition: background 0.2s;
}

button:hover {
    background: #2cfa1a;
}

.result {
    margin: 18px 0;
}

#password-result {
    width: 100%;
    padding: 10px;
    font-size: 1.2rem;
    background: #111;
    color: #39ff14;
    border: none;
    border-radius: 6px;
    text-align: center;
    letter-spacing: 2px;
}

.back-btn {
    background: transparent;
    color: #39ff14;
    border: 1px solid #39ff14;
    margin-top: 8px;
    font-size: 1rem;
    padding: 7px 18px;
    transition: background 0.2s, color 0.2s;
}

.back-btn:hover {
    background: #39ff14;
    color: #0f2027;
}