/* B/R Instrument Modern Design System */

:root {
    --primary: #294876;
    --primary-dark: #1a2f4d;
    --primary-light: #4a68a3;
    --secondary: #f8f9fa;
    --dark: #212529;
    --light: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;

    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
}

/* Dark mode colors */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --card-bg: #2d2d2d;
    --border-color: #495057;
    --gray-100: #2d2d2d;
    --gray-200: #3a3a3a;
    --gray-300: #495057;
}

/* Base Styles */
body {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    padding-top: 76px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

p, li, td, th, label, span {
    color: var(--text-primary);
}

.text-muted {
    color: var(--text-secondary) !important;
}

.lead {
    color: var(--text-primary);
}

.text-primary {
    color: var(--primary) !important;
}

.bg-primary {
    background-color: var(--primary) !important;
}

.bg-light {
    background-color: var(--bg-secondary) !important;
}

.bg-primary-subtle {
    background-color: rgba(41, 72, 118, 0.1);
    color: var(--primary);
}

.btn {
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
}

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

.btn-outline-light {
    color: white;
    border-color: white;
}

.btn-outline-light:hover {
    background-color: white;
    color: var(--primary);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    background: transparent;
    border: 2px solid var(--text-secondary);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
    background-color: var(--bg-secondary);
    transform: scale(1.1);
}

/* Navigation */
.navbar {
    background-color: var(--card-bg) !important;
    transition: var(--transition);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.navbar-light {
    background-color: var(--card-bg) !important;
}

.bg-white {
    background-color: var(--card-bg) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    transition: var(--transition);
}

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

.dropdown-menu {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    border-radius: var(--border-radius);
}

.dropdown-item {
    padding: 0.5rem 1.5rem;
    font-weight: 400;
    transition: var(--transition);
    color: var(--text-primary);
}

.dropdown-item:hover {
    background-color: var(--gray-100);
    color: var(--primary);
}

/* Hero Section */
.hero-section {
    padding-top: 6rem;
    padding-bottom: 2rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
}

.hero-image-wrapper {
    position: relative;
    min-height: 400px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 600"><rect fill="%23294876" width="800" height="600"/><g fill="%23ffffff" opacity="0.1"><circle cx="400" cy="300" r="200"/><circle cx="400" cy="300" r="150"/><circle cx="400" cy="300" r="100"/></g><text x="400" y="320" font-family="Arial" font-size="24" fill="%23ffffff" text-anchor="middle">Laboratory Distillation Equipment</text></svg>') center/cover;
    opacity: 0.3;
}

.hero-image-wrapper img {
    max-width: 100%;
    height: auto;
    position: relative;
    z-index: 1;
}

.badge {
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.875rem;
}

/* Product Cards */
.product-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

.card h3, .card h4, .card h5, .card-title {
    color: var(--text-primary) !important;
}

.card-body {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(41, 72, 118, 0.1);
    border-radius: 50%;
}

.product-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.product-card h4 {
    color: var(--text-primary);
}

.product-card p {
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

/* Stats Cards */
.stat-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid var(--border-color);
}

/* Testimonial Card */
.testimonial-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    margin-left: 2rem;
    border: 1px solid var(--border-color);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

/* Footer */
footer {
    font-size: 0.875rem;
}

footer h4, footer h5 {
    font-weight: 600;
}

footer a:hover {
    color: white !important;
}

/* Accordion */
.accordion-button {
    font-weight: 500;
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.accordion-button:not(.collapsed) {
    color: var(--primary);
    background-color: rgba(41, 72, 118, 0.1);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: rgba(41, 72, 118, 0.25);
}

.accordion-item {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.accordion-body {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

/* Utilities */
.gap-3 {
    gap: 1rem !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

.shadow-lg {
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Product Pages */
.product-image-wrapper {
    position: relative;
    min-height: 400px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0.3;
}

.product-image-wrapper img {
    max-width: 100%;
    height: auto;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.table-responsive {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table {
    margin-bottom: 0;
    color: var(--text-primary);
}

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

.table tbody {
    background-color: var(--card-bg);
}

.table td, .table th {
    border-color: var(--border-color);
}

.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 2rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--gray-500);
}

.breadcrumb-item.active {
    color: var(--text-primary);
}

.breadcrumb-item a {
    color: var(--text-primary);
}

.breadcrumb-item a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .btn {
        margin-top: 1rem;
        width: 100%;
    }
    
    .hero-section {
        padding-top: 2rem;
    }
    
    .testimonial-card {
        margin-left: 0;
        margin-top: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .display-5 {
        font-size: 2rem;
    }
    
    .hero-section {
        text-align: center;
    }
    
    .hero-section .d-flex {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-section .btn {
        width: 100%;
        max-width: 300px;
        margin-bottom: 0.5rem;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
    
    .cta-section .d-flex {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-section .btn {
        margin-bottom: 0.5rem;
        width: 100%;
        max-width: 250px;
    }
}