/* Custom Styles for BIOGENCH Website */

/* Base Styles */
:root {
    --primary: #0A3D6F;
    --secondary: #E8F1F8;
    --accent: #1E88E5;
    --dark: #333333;
    --medium: #666666;
    --light: #f8f9fa;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark);
}

/* Navigation Styles */
.nav-link {
    color: var(--dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-nav-link {
    color: var(--dark);
    font-weight: 500;
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
    transition: color 0.3s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--primary);
}

/* Button Styles */
.btn-primary {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid var(--accent);
}

.btn-primary:hover {
    background-color: #1565C0;
    border-color: #1565C0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-accent {
    display: inline-block;
    background-color: white;
    color: var(--primary);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-accent:hover {
    background-color: var(--secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Card Styles */
.advantage-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.product-image {
    position: relative;
    overflow: hidden;
}

.cert-card {
    transition: all 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-4px);
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
}

/* Header Scroll Effect */
.header-scrolled {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-scrolled .nav-link {
    color: var(--dark);
}

.header-scrolled .nav-link:hover,
.header-scrolled .nav-link.active {
    color: var(--primary);
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Back to Top Button */
#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* Mobile Menu */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

#mobile-menu.active {
    max-height: 500px;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Table Styles */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background-color: var(--secondary);
    font-weight: 600;
    color: var(--primary);
}

.data-table tr:hover {
    background-color: #f8f9fa;
}

/* Badge Styles */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-primary {
    background-color: var(--primary);
    color: white;
}

.badge-accent {
    background-color: var(--accent);
    color: white;
}

.badge-success {
    background-color: #28a745;
    color: white;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Toast Notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    color: white;
    font-weight: 500;
    z-index: 9999;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.visible {
    transform: translateX(0);
}

.toast-success {
    background-color: #28a745;
}

.toast-error {
    background-color: #dc3545;
}

.toast-info {
    background-color: var(--accent);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

/* Timeline Styles */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--accent);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -35px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--accent);
}

.timeline-year {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* Accordion Styles */
.accordion-item {
    border: 1px solid #eee;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.accordion-header {
    padding: 1rem 1.5rem;
    background-color: var(--light);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary);
    transition: background-color 0.3s ease;
}

.accordion-header:hover {
    background-color: var(--secondary);
}

.accordion-icon {
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
}

.accordion-body {
    padding: 1rem 1.5rem;
}

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.page-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 0.25rem;
    color: var(--dark);
    text-decoration: none;
    transition: all 0.3s ease;
}

.page-btn:hover {
    background-color: var(--secondary);
    border-color: var(--accent);
}

.page-btn.active {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Filter Styles */
.filter-group {
    margin-bottom: 1.5rem;
}

.filter-title {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.filter-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 2rem;
    background: white;
    color: var(--dark);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Search Box Styles */
.search-box {
    position: relative;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid #ddd;
    border-radius: 2rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .btn-primary,
    .btn-secondary,
    .btn-accent {
        display: block;
        width: 100%;
        text-align: center;
    }

    .advantage-card {
        padding: 1.5rem;
    }

    .data-table {
        font-size: 0.875rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }

    body {
        font-size: 12pt;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}