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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #ed1c1c 0%, #000000 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.input-section .card {
    max-width: 500px;
    margin: 0 auto;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

select, input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s ease;
}

select:focus, input:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

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

.btn-secondary {
    background: #6c757d;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-linkedin {
    background: #0077b5;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-linkedin:hover {
    background: #005885;
}

/* Loading Spinner */
.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading-section, .error-section {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.error-card {
    border-left: 5px solid #e74c3c;
}

/* Certificate Section */
.certificate-container {
    text-align: center;
    margin: 30px 0;
}

#certificateCanvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 30px 0;
}

.certificate-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
}

.certificate-info p {
    margin-bottom: 10px;
}

footer {
    text-align: center;
    margin-top: 40px;
    color: white;
}

footer a {
    color: white;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 20px;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    #certificateCanvas {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }

    .btn-primary, .btn-linkedin {
        padding: 12px 20px;
        font-size: 14px;
    }
}