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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 28px;
    font-weight: 600;
}

.form-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 500;
    color: #555;
    font-size: 14px;
}

input[type="text"] {
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
}

input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#submitBtn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#submitBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

#submitBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.loading {
    text-align: center;
    padding: 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

.result {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    border-left: 4px solid #28a745;
}

.result h3 {
    color: #28a745;
    margin-bottom: 20px;
    text-align: center;
}

.connection-info p {
    margin-bottom: 10px;
    color: #333;
}

.link-container {
    display: flex;
    gap: 10px;
    margin: 15px 0;
}

.link-container input {
    flex: 1;
    font-family: monospace;
    font-size: 14px;
}

.link-container button {
    background: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s ease;
}

.link-container button:hover {
    background: #218838;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(40, 167, 69, 0.3);
}

.link-container button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(40, 167, 69, 0.2);
}

.link-container button.success {
    background: #28a745 !important;
    animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.instructions {
    margin-top: 20px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.instructions h4 {
    color: #495057;
    margin-bottom: 15px;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 8px;
    color: #6c757d;
    line-height: 1.5;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #f5c6cb;
    text-align: center;
}

.hidden {
    display: none;
}

@media (max-width: 480px) {
    .panel {
        padding: 30px 20px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .link-container {
        flex-direction: column;
    }
    
    .link-container input {
        margin-bottom: 10px;
    }
}