/* -------------------------------
   General Styles
---------------------------------*/
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0 1em;
    background-color: #f0f2f5;
    color: #111;
}

h1, h2, h3 {
    margin: 0.5em 0;
}

p {
    margin: 0.5em 0;
}

/* -------------------------------
   Header / Navigation
---------------------------------*/
header {
    background-color: #333;
    color: #fff;
    padding: 0.5em 1em;
}

header h1 a {
    color: #fff;
    text-decoration: none;
}

nav {
    margin-top: 0.5em;
}

nav a,
nav .nav-link {
    color: #fff;
    text-decoration: none;
    padding: 0.5em 1em;
    display: inline-block;
    transition: background 0.2s, border-radius 0.2s;
}

nav a:hover,
nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

nav form {
    display: inline;
}

/* -------------------------------
   Buttons (including links styled as buttons)
---------------------------------*/
button,
input[type="submit"],
.button-link {
    cursor: pointer;
    border: none;
    padding: 0.5em 1em;
    background-color: #333;
    color: #fff;
    font-size: 1em;
    text-decoration: none; /* removes underline for button-links */
    display: inline-block;
    border-radius: 4px;
    transition: background 0.2s, border-radius 0.2s;
}

button:hover,
input[type="submit"]:hover,
.button-link:hover {
    background-color: #555;
}

/* -------------------------------
   Forms & Inputs
---------------------------------*/
form {
    margin: 1em 0;
}

input[type="text"],
input[type="password"],
input[type="file"] {
    padding: 0.5em;
    width: 100%;
    max-width: 400px;
    margin: 0.3em 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

/* -------------------------------
   Message Boxes / Key Boxes
---------------------------------*/
.message-box,
.key-box {
    display: inline-block;
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid #ccc;
    background: #f9f9f9;
    font-family: monospace;
    white-space: pre;
    margin-bottom: 0.5em;
}

/* -------------------------------
   Mobile Nav
---------------------------------*/
@media (max-width: 600px) {
    nav a,
    nav .nav-link {
        display: block;
        margin: 0.2em 0;
    }
}

/* -------------------------------
   Forms (Send Message / Account)
---------------------------------*/
.message-form,
.account-form {
    max-width: 400px;
    padding: 10px;
    border: 1px solid #ccc;
    background: #fff;
    margin: 1em 0;
    border-radius: 4px;
}

.message-form label,
.account-form label {
    display: block;
    margin-bottom: 0.3em;
    font-weight: bold;
}

.message-form input[type="text"],
.message-form input[type="file"],
.account-form input[type="text"],
.account-form input[type="password"] {
    margin-bottom: 0.8em;
}

/* -------------------------------
   Encryption Method Radios
---------------------------------*/
.encryption-methods {
    margin-bottom: 0.8em;
}

.encryption-methods input[type="radio"] {
    margin-right: 0.3em;
}

.encryption-methods label {
    margin-right: 1em;
}

/* -------------------------------
   Success / Error Messages
---------------------------------*/
.success-message {
    color: green;
}

.error-message {
    color: red;
}


.decryption-error {
    display: inline-block;
    max-width: 100%;
    padding: 5px;
    border: 1px solid #f00;
    background: #ffecec;
    color: #900;
    font-family: monospace;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: anywhere;
}