:root {
    --bg-light: #f5f5f5;
    --text-light: #333;
    --accent-light: #007BFF;
    --bg-dark: #121212;
    --text-dark: #f0f0f0;
    --accent-dark: #4dabf7;
    --bg-eye-saver: #f4e6c4;
    --text-eye-saver: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
    background-color: var(--bg-light);
    color: var(--text-light);
    line-height: 1.6;
}

body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

body.eye-saver {
    background-color: var(--bg-eye-saver);
    color: var(--text-eye-saver);
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    background-color: var(--bg-light);
    transition: background-color 0.3s;
}

body.dark-mode .container {
    background-color: var(--bg-dark);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body.eye-saver .container {
    background-color: var(--bg-eye-saver);
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
}

header h1 {
    margin: 0;
    font-size: 2rem;
    color: var(--accent-light);
}

body.dark-mode header h1 {
    color: var(--accent-dark);
}

.attribution {
    margin: 0.5rem 0 0;
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.8;
}

body.dark-mode .attribution {
    color: var(--text-dark);
}

.theme-toggle {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.theme-toggle button {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-light);
    transition: color 0.3s;
}

body.dark-mode .theme-toggle button {
    color: var(--text-dark);
}

.input-group, .output-group {
    margin-bottom: 1.5rem;
}

textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body.dark-mode textarea {
    background-color: #1e1e1e;
    color: var(--text-dark);
    border-color: #444;
}

body.eye-saver textarea {
    background-color: #f9f1d6;
    color: var(--text-eye-saver);
}

#password {
    width: 100%;
    padding: 0.8rem;
    margin: 0.5rem 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body.dark-mode #password {
    background-color: #1e1e1e;
    color: var(--text-dark);
    border-color: #444;
}

body.eye-saver #password {
    background-color: #f9f1d6;
    color: var(--text-eye-saver);
}

.buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

button {
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    background-color: var(--accent-light);
    color: white;
    transition: background-color 0.3s;
}

body.dark-mode button {
    background-color: var(--accent-dark);
}

button:hover {
    opacity: 0.9;
}

#copy-btn {
    background-color: #28a745;
}

body.dark-mode #copy-btn {
    background-color: #218838;
  }