/* Reset & Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme Colors */
    --primary-color: #0B1E3B;
    --accent-color: #FF7A00;
    --text-primary: #2C3E50;
    --text-secondary: #718096;
    --text-light: #A0AEC0;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7FAFC;
    --bg-tertiary: #EDF2F7;
    --border-color: #E2E8F0;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: #F7FAFC;
    --text-secondary: #CBD5E0;
    --text-light: #A0AEC0;
    --bg-primary: #1A202C;
    --bg-secondary: #2D3748;
    --bg-tertiary: #4A5568;
    --border-color: #4A5568;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.5);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-sticky);
    transition: all var(--transition-normal);
}

[data-theme="dark"] .header {
    background-color: rgba(26, 32, 44, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-brand .logo {
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.nav-menu {
    display: none;
    list-style: none;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--primary-color);
    background-color: var(--bg-tertiary);
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    
    .nav-toggle {
        display: none;
    }
    
    .nav-container {
        padding: 0 var(--spacing-xl);
    }
}

/* Mobile Menu */
.nav-menu.active {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-medium);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
}

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

.btn-primary:hover {
    background-color: #0a1a33;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
    background-color: #e66a00;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-full {
    width: 100%;
}

/* Section Styling */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-large);
}

@media (min-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
        padding: 0 var(--spacing-xl);
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-subtitle {
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero-cta {
        flex-direction: row;
        justify-content: flex-start;
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background-color: var(--bg-secondary);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-color);
    color: white;
    border-radius: var(--radius-xl);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Solutions Grid */
.solutions {
    background-color: var(--bg-secondary);
}

.solutions-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.solution-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.solution-icon {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.solution-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.solution-description {
    color: var(--text-secondary);
}

@media (min-width: 768px) {
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .solutions-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.product-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.badge-stock {
    background-color: #10B981;
    color: white;
}

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

.product-content {
    padding: var(--spacing-lg);
}

.product-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* References */
.references {
    background-color: var(--bg-secondary);
}

.references-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
    opacity: 0.7;
}

.logo-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    transition: opacity var(--transition-normal);
}

.logo-item:hover {
    opacity: 1;
}

.logo-item img {
    max-width: 100%;
    max-height: 60px;
    object-fit: contain;
    filter: grayscale(100%);
    transition: filter var(--transition-normal);
}

.logo-item:hover img {
    filter: grayscale(0%);
}

.testimonials {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.testimonial {
    background-color: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

.testimonial blockquote {
    font-style: italic;
    color: var(--text-secondary);
}

.testimonial cite {
    display: block;
    margin-top: var(--spacing-md);
    font-style: normal;
    font-weight: 600;
    color: var(--primary-color);
}

@media (min-width: 768px) {
    .testimonials {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--bg-tertiary);
}

.faq-icon {
    transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-answer.active {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
}

/* Contact */
.contact {
    background-color: var(--bg-secondary);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.error-message {
    display: block;
    color: #E53E3E;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.contact-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.contact-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

@media (min-width: 768px) {
    .contact-container {
        grid-template-columns: 2fr 1fr;
    }
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: white;
    text-decoration: none;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Scroll to Top */
.scroll-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-modal);
}

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

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.8);
    transition: transform var(--transition-normal);
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.modal-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.modal-details h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.modal-details h5 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.modal-details ul {
    list-style: none;
    padding-left: 0;
}

.modal-details li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.modal-details li::before {
    content: "✓";
    color: var(--accent-color);
    margin-right: var(--spacing-sm);
    font-weight: bold;
}

@media (min-width: 768px) {
    .modal-body {
        grid-template-columns: 1fr 1fr;
    }
    
    .modal-content {
        max-width: 800px;
    }
}

/* Notification */
.notification {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background-color: #10B981;
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-large);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-popover);
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

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

/* Print Styles */
@media print {
    .header,
    .scroll-to-top,
    .modal {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .btn {
        border: 2px solid black !important;
        background: white !important;
        color: black !important;
    }
}