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

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

.container {
    max-width: 600px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 10px;
}

.header p {
    font-size: 14px;
    font-weight: 300;
    opacity: 0.9;
}

.verification-methods {
    padding: 30px;
}

.method-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid #e0e0e0;
    background: white;
    color: #666;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 500;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: #667eea;
    color: #667eea;
}

.tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.scanner-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto 20px;
    border-radius: 15px;
    overflow: hidden;
    background: #000;
}

#qr-video {
    width: 100%;
    height: auto;
    display: block;
}

.scanner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scanner-frame {
    width: 200px;
    height: 200px;
    border: 3px solid #667eea;
    border-radius: 15px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.result-container {
    padding: 30px;
    border-top: 1px solid #e0e0e0;
}

.result-container.hidden {
    display: none;
}

.status-badge {
    display: inline-block;
    padding: 10px 30px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 25px;
}

.status-badge.valid {
    background: #10b981;
    color: white;
}

.status-badge.invalid {
    background: #ef4444;
    color: white;
}

.certificate-details {
    background: #f9fafb;
    border-radius: 15px;
    padding: 20px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #e5e7eb;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row .label {
    font-size: 13px;
    font-weight: 500;
    color: #6b7280;
}

.detail-row .value {
    font-size: 14px;
    font-weight: 600;
    color: #111827;
    text-align: right;
}

.result-invalid {
    text-align: center;
}

.result-invalid .message {
    font-size: 14px;
    color: #6b7280;
    margin-top: 15px;
}

/* Responsive */
@media (max-width: 640px) {
    .header h1 {
        font-size: 24px;
    }
    
    .method-tabs {
        flex-direction: column;
    }
    
    .detail-row {
        flex-direction: column;
        gap: 5px;
    }
    
    .detail-row .value {
        text-align: left;
    }
}