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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 700px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    padding: 20px 0;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.card h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.info {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #444;
}

.form-group textarea,
.form-group select,
.form-group input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group textarea {
    resize: vertical;
    font-family: 'Courier New', monospace;
}

.form-group textarea:focus,
.form-group select:focus,
.form-group input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.btn-text {
    background: transparent;
    color: #667eea;
    padding: 10px;
}

.btn-text:hover {
    background: #f5f5f5;
}

.link-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.link-container input {
    flex: 1;
    padding: 12px;
    border: 2px solid #667eea;
    border-radius: 8px;
    font-size: 0.95rem;
    background: #f8f9ff;
}

.warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
    color: #856404;
}

.secret-display {
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.secret-display pre {
    margin: 0;
    white-space: pre-wrap;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: #333;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.error-card {
    border-top: 4px solid #dc3545;
}

.error-text {
    color: #dc3545;
    font-weight: 600;
}

.hidden {
    display: none !important;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

footer {
    text-align: center;
    color: white;
    padding: 20px;
    opacity: 0.9;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 20px;
    }

    .link-container {
        flex-direction: column;
    }

    .button-group {
        flex-direction: column;
    }
}