:root {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --gradient-light: #5dade2;
    --gradient-dark: #1a5276;
    --input-bg: #2d2d2d;
    --border-color: #404040;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 90%;
    max-width: 800px;
    padding: 2rem;
    margin: 0 auto;
}

.section-wrapper {
    display: flex;
    gap: 2rem;
    width: 100%;
}

.encoder-section, .converter-section {
    flex: 1;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

h2 {
    text-align: center;
    margin-bottom: 2rem;
    background: linear-gradient(to right, var(--gradient-light), var(--gradient-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.input-group, .output-group {
    margin-bottom: 1.5rem;
    width: 100%;
    max-width: 800px;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--input-bg);
    color: var(--text-color);
    resize: none;
    font-size: 1rem;
    margin-bottom: 1rem;
    box-sizing: border-box;
}

.controls {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.converter-controls {
    display: flex;
    gap: 1rem;
    flex-direction: column;
    align-items: center;
}

.converter-controls > div {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

select, button, input {
    padding: 0.5rem 1rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
    cursor: pointer;
    font-size: 1rem;
}

select {
    width: 200px;
    text-align: center;
}

button {
    background: linear-gradient(to right, var(--gradient-light), var(--gradient-dark));
    border: none;
    transition: all 0.3s ease;
}

button:hover {
    background: linear-gradient(to right, var(--gradient-dark), var(--gradient-light));
}

.buttons {
    display: flex;
    gap: 1rem;
}

#caesar-shift {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#caesar-shift input {
    width: 60px;
}

#copy, #converter-copy {
    width: 100%;
    margin-top: 0.5rem;
    text-align: center;
}

.hidden {
    display: none !important;
}

@media (max-width: 1200px) {
    .section-wrapper {
        flex-direction: column;
    }
}