@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes backgroundShift {
    0%, 100% { 
        transform: translateX(0) translateY(0); 
    }
    33% { 
        transform: translateX(-10px) translateY(-10px); 
    }
    66% { 
        transform: translateX(10px) translateY(10px); 
    }
}

.animate-fadeIn {
    animation: fadeIn 1s ease-out;
}

.animate-delay-200 {
    animation-delay: 0.2s;
}

.animate-delay-400 {
    animation-delay: 0.4s;
}

.hero-bg {
    background: #f8fafc;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: backgroundShift 20s ease-in-out infinite;
}

.form-input {
    transition: all 0.3s ease;
}

.form-input:focus {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.15);
}

.checker-card {
    background: rgba(255, 255, 255, 1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.tools-content-box {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.tools-content-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.related-page-box {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.related-page-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.related-page-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.related-page-link:hover {
    text-decoration: none;
    color: inherit;
}

.accordion-item {
    background: white;
    border-radius: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.accordion-header {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 1.5rem;
    cursor: pointer;
    border: none;
    width: 100%;
    text-align: left;
    font-weight: 600;
    color: #374151;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-header:hover {
    background: linear-gradient(135deg, #f1f5f9 0%, #f8fafc 100%);
}

.accordion-content {
    padding: 1.5rem;
    border-top: 1px solid #e5e7eb;
    display: none;
    max-height: none;
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item a {
    color: #6b7280;
    text-decoration: none;
}

.breadcrumb-item.active {
    color: #374151;
}

.btn_sample_format {
    color: #667eea;
    cursor: pointer;
    text-decoration: underline;
    margin-left: 0.5rem;
}

.validate_text {
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.preloader {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f4f6;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Custom Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 1rem;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    opacity: 0;
    transition: all 0.3s ease;
}

.modal-overlay.show {
    display: flex;
}

.modal-overlay.show .modal-content {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.modal-body {
    padding: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6b7280;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #f3f4f6;
    color: #374151;
}