:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-gray: #f5f5f5;
    --dark-gray: #333;
    --medium-gray: #999;
    --border-radius: 4px;
    --box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: #f0f2f5;
    padding: 20px;
}

#logo {
    display: block;
    width: 100%;
    aspect-ratio: 640/100;
    background-image: url(/logo_arpane.png);
    background-size: 50%;
    background-position: center;
    background-repeat: no-repeat;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

header p {
    color: var(--medium-gray);
}

.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    margin-bottom: 20px;
}

.card.success {
    border-left: 4px solid var(--success-color);
}

.card.error {
    border-left: 4px solid var(--danger-color);
}

h2 {
    margin-bottom: 20px;
    color: var(--dark-gray);
}

h3 {
    margin: 15px 0 10px;
    color: var(--dark-gray);
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

textarea, input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}

textarea:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.form-actions {
    margin-top: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.btn.primary:hover {
    background-color: var(--secondary-color);
}

.btn.secondary {
    background-color: var(--light-gray);
}

.btn.secondary:hover {
    background-color: #e5e5e5;
}

.info {
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: var(--border-radius);
    padding: 20px;
}

.info h3 {
    color: var(--primary-color);
}

.info ol {
    margin-left: 20px;
}

.info li {
    margin-bottom: 10px;
}

.share-info {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
}

.copy-field {
    display: flex;
    margin: 10px 0;
}

.copy-field input {
    flex: 1;
    margin-right: 10px;
    font-size: 0.9rem;
}

.warning {
    margin-top: 15px;
    padding: 10px;
    background-color: rgba(243, 156, 18, 0.1);
    border-left: 4px solid var(--warning-color);
    font-size: 0.9rem;
}

.secret-content {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    overflow-x: auto;
}

.secret-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: monospace;
}

.actions {
    margin-top: 20px;
    text-align: center;
}

footer {
    text-align: center;
    margin-top: 30px;
    color: var(--medium-gray);
    font-size: 0.9rem;
}

.actions .btn.secondary {
    margin-left: 10px;
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    .card {
        padding: 15px;
    }
    
    .copy-field {
        flex-direction: column;
    }
    
    .copy-field input {
        margin-right: 0;
        margin-bottom: 10px;
    }
}