* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f1f3f6;
}

.container {
    width: 340px;
    background: #ffffff;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.container h2 {
    margin-bottom: 15px;
    color: #333;
}

.container h3 {
    margin: 10px 0 20px;
    color: #555;
}

input {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 15px;
}

.checkbox {
    display: flex;
    align-items: center;
    font-size: 14px;
    margin: 8px 0;
    color: #444;
}

.checkbox input {
    width: auto;
    margin-right: 6px;
}

button {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
    border: none;
    border-radius: 4px;
    background: #0d6efd;
    color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #084298;
}

.toggle-btn {
    background: #444;
    font-size: 14px;
}

.toggle-btn:hover {
    background: #222;
}

p {
    margin-top: 12px;
    font-size: 14px;
}

a {
    color: #0d6efd;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

body.dark {
    background: #121212;
}

body.dark .container {
    background: #1e1e1e;
    box-shadow: none;
}

body.dark h2,
body.dark h3,
body.dark p,
body.dark label {
    color: #ffffff;
}

body.dark input {
    background: #2c2c2c;
    color: #ffffff;
    border: 1px solid #555;
}

body.dark button {
    background: #0d6efd;
}

body.dark .toggle-btn {
    background: #666;
}