/* Cyberpunk Theme */
body {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #0a0a0a 100%);
    color: #00ff88;
    font-family: 'Courier New', monospace;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 3rem 2rem;
    background: rgba(0, 255, 136, 0.1);
    border-bottom: 2px solid #00ff88;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

h1 {
    font-size: 3rem;
    margin: 0;
    text-shadow: 0 0 10px #00ff88, 0 0 20px #00ff88;
}

h2 {
    color: #00bfff;
    text-shadow: 0 0 5px #00bfff;
    border-bottom: 1px solid #00bfff;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

nav {
    background: rgba(0, 191, 255, 0.1);
    padding: 1.5rem 2rem;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

nav li {
    display: inline-block;
}

nav a {
    color: #00ff88;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border: 1px solid #00ff88;
    border-radius: 5px;
    transition: all 0.3s;
    display: block;
}

nav a:hover {
    background: rgba(0, 255, 136, 0.2);
    box-shadow: 0 0 10px #00ff88;
}

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

section {
    margin-bottom: 4rem;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #00bfff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 191, 255, 0.2);
}

form {
    margin-bottom: 2rem;
}

label {
    display: block;
    margin-bottom: 0.75rem;
    color: #00ff88;
    font-weight: bold;
}

textarea, input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #00bfff;
    color: #00ff88;
    font-family: 'Courier New', monospace;
    border-radius: 5px;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

button {
    background: linear-gradient(45deg, #00ff88, #00bfff);
    border: none;
    color: #000;
    padding: 0.75rem 1.5rem;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
}

button:hover {
    box-shadow: 0 0 10px #00ff88, 0 0 20px #00bfff;
    transform: scale(1.05);
}

#caesar-output, #affine-output, #vigenere-output, #playfair-output, #hill-output, #keyword-output, #columnar-output, #autokey-output, #running-output, #stream-output {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #00ff88;
    border-radius: 5px;
    white-space: pre-wrap;
    font-family: 'Courier New', monospace;
    max-height: 500px;
    overflow-y: auto;
    font-size: 0.9rem;
}

/* Animations */
@keyframes glow {
    0% { text-shadow: 0 0 5px #00ff88; }
    50% { text-shadow: 0 0 20px #00ff88, 0 0 30px #00ff88; }
    100% { text-shadow: 0 0 5px #00ff88; }
}

h1 {
    animation: glow 2s ease-in-out infinite alternate;
}

/* Responsive */
@media (max-width: 1024px) {
    main {
        padding: 3rem 1.5rem;
    }
    section {
        padding: 2.5rem;
        margin-bottom: 3rem;
    }
    nav ul {
        gap: 0.75rem;
    }
    nav a {
        padding: 0.5rem 1rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 2rem 1rem;
    }
    h1 {
        font-size: 2.5rem;
    }
    nav {
        padding: 1rem;
    }
    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }
    nav li {
        width: 100%;
        max-width: 300px;
    }
    nav a {
        text-align: center;
    }
    main {
        padding: 2rem 1rem;
    }
    section {
        padding: 2rem 1.5rem;
        margin-bottom: 2.5rem;
    }
    textarea, input[type="number"] {
        padding: 0.5rem;
    }
    button {
        padding: 0.5rem 1rem;
        width: 100%;
    }
    #caesar-output, #affine-output, #vigenere-output, #playfair-output, #hill-output, #keyword-output, #columnar-output, #autokey-output, #running-output, #stream-output {
        padding: 1rem;
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    section {
        padding: 1.5rem 1rem;
    }
    nav a {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
}