.form-register {
    background-color: var(--light-gray);
    padding-bottom: 3rem;
    position: relative;
    --form-header-margin: -5rem;
}
.section-triangle {
    background-color: var(--light-gray);
}

.form-register__header {
    padding: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    width: 100%;
    aspect-ratio: 5 / 1;
    background-color: red;
    position: relative;
    overflow: hidden;
    color: var(--white-color);
}
.form-register__header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 1;
}
.form-register__header img {
    position: absolute;
    width: 100%;
    object-fit: cover;
    z-index: 0;
    filter: blur(2px);
}

.form-register__header h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-top: calc(var(--form-header-margin) + 0.5rem);
    position: relative;
    z-index: 2;
    text-align: center;
}

.form-register__header p {
    opacity: 0.9;
    font-size: 1.1rem;
    margin-bottom: 0;
    position: relative;
    z-index: 2;
}

.form-container {
    padding: 40px;
    background-color: var(--white-color);
    position: relative;
    margin-top: var(--form-header-margin);
    border-radius: .25rem;
    box-shadow: 0 0 8px 2px rgba(180, 180, 180, 0.1);
    z-index: 3;
    border: 2px solid var(--border-color);
}

.section-title {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 3px solid #3498db;
    display: inline-block;
    font-weight: 600;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #34495e;
    font-weight: 500;
    font-size: 0.95rem;
}

.required {
    color: #e74c3c;
    font-weight: bold;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-control:hover {
    border-color: #bdc3c7;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

select.form-control {
    cursor: pointer;
}

.checkbox-section {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 30px;
    margin-top: 30px;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.checkbox-item {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid #e1e8ed;
    transition: all 0.3s ease;
    cursor: pointer;
}

.checkbox-item:hover {
    border-color: #3498db;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.checkbox-item.selected {
    border-color: #3498db;
    background: #f0f8ff;
}

.checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.custom-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid #bdc3c7;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    margin-top: 2px;
}

.custom-checkbox.checked {
    background: #3498db;
    border-color: #3498db;
}

.custom-checkbox.checked::after {
    content: '✓';
    color: white;
    font-weight: bold;
    font-size: 14px;
}

.checkbox-label {
    flex: 1;
    color: #2c3e50;
    line-height: 1.5;
    font-weight: 500;
    cursor: pointer;
}

.submit-section {
    text-align: center;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #ecf0f1;
}

.submit-btn {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(1137, 137, 137, 0.1);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(137, 137, 137, 0.2);
}

.submit-btn:active {
    transform: translateY(-1px);
}

/* input group */
.input-loading-group {
    position: relative;
}
.input-loading-group .input-loading {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-42%);
    display: none;
}
.input-loading-group .input-loading.active {
    display: block;
}
.input-loading-group .input-loading i {
    color: var(--gray-color-secondary);
    font-size: 22px;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
    
    .form-container {
        padding: 20px;
    }
    
    .header {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
}

.form-message {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 5px;
}

.avatar-group {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 20px 0 12px;
}

.avatar-upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    width: 100%;
    max-width: 300px;
}

.avatar-preview {
    height: 180px;
    aspect-ratio: 16 / 9;
    border: 3px dashed #bdc3c7;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #f8f9fa;
    position: relative;
}

.avatar-preview:hover {
    border-color: #3498db;
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.2);
}

.avatar-preview.has-image {
    border-style: solid;
    border-color: #3498db;
}

.avatar-placeholder {
    text-align: center;
    color: #7f8c8d;
    transition: all 0.3s ease;
}

.avatar-placeholder svg {
    margin-bottom: 8px;
    opacity: 0.6;
    width: 60px;
    height: 60px;
}


.avatar-placeholder p {
    font-size: 0.9rem;
    margin: 0;
    font-weight: 500;
}

.avatar-preview:hover .avatar-placeholder {
    color: #3498db;
    transform: scale(1.1);
}
.avatar-preview:hover .avatar-placeholder svg g {
    stroke: #3498db;
}

#avatarImage {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
}

.avatar-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.avatar-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.upload-btn {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
    box-shadow: 0 3px 10px rgba(46, 204, 113, 0.3);
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.4);
}

.remove-btn {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    box-shadow: 0 3px 10px rgba(231, 76, 60, 0.3);
}

.remove-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
}

.form-register input::placeholder,
.form-register textarea::placeholder {
    color: var(--color-fade);
}
.form-register input:focus::placeholder,
.form-register textarea:focus::placeholder {
    color: transparent !important;
}

@media (max-width: 1400px) {
    .form-register__header {
        aspect-ratio: 20 / 5;
    }
}

@media (max-width: 992px) {
    .form-register {
        --form-header-margin: -4rem;
    }
    .form-register__header {
        aspect-ratio: 10 / 3;
    }
}

@media (max-width: 769px) {
    .form-register {
        --form-header-margin: -4rem;
    }

    .form-register__header {
        aspect-ratio: 5 / 2;
    }
}

@media (max-width: 576px) {
    .form-register {
        --form-header-margin: -2.5rem;
    }

    .form-register__header {
        aspect-ratio: 2 / 1;
    }

        .form-register__header h1 {
            font-size: 1.5rem;
        }
}