/* ============================================
   OIS IT Services - Modern Website Styles
   ============================================ */

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

:root {
    --primary-blue: #2563eb;
    --dark-blue: #1e40af;
    --light-blue: #3b82f6;
    --black: #1f2937;
    --dark-gray: #4b5563;
    --gray: #6b7280;
    --light-gray: #9ca3af;
    --bg-gray: #f3f4f6;
    --white: #ffffff;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    color: var(--dark-blue);
}

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

.nav-menu a {
    color: var(--black);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: var(--transition);
}

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

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-blue);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--black);
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    padding: calc(80px + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl);
    text-align: center;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

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

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

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

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================
   Sections
   ============================================ */

.section {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.alt-section {
    background-color: var(--bg-gray);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--black);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--dark-gray);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

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

/* ============================================
   Page Header
   ============================================ */

.page-header {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    padding: calc(80px + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.25rem;
    color: var(--dark-gray);
}

/* ============================================
   Services Grid
   ============================================ */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

.services-detailed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-detail-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.service-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-detail-card .service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-detail-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-xs);
}

.service-detail-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* ============================================
   Products
   ============================================ */

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.product-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.product-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.product-card p {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.product-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.product-link:hover {
    color: var(--dark-blue);
}

.product-showcase {
    max-width: 900px;
    margin: 0 auto;
}

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

.product-icon-large {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
}

.product-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.product-tagline {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.product-features {
    text-align: left;
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.product-features h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--dark-gray);
    line-height: 1.8;
}

.product-description {
    font-size: 1.125rem;
    color: var(--dark-gray);
    line-height: 1.8;
    text-align: left;
}

/* ============================================
   About Page
   ============================================ */

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.about-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.about-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.about-card h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    font-size: 1.125rem;
    color: var(--dark-gray);
    line-height: 1.8;
}

.different-section {
    background-color: var(--bg-gray);
}

.different-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.different-item {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: var(--transition);
}

.different-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.different-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.different-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-xs);
}

.different-item p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

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

.cta-section .btn-primary:hover {
    background-color: var(--bg-gray);
    transform: translateY(-2px);
}

/* ============================================
   Contact Page
   ============================================ */

.contact-section {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.contact-info > p {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-detail-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-detail-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: var(--spacing-xs);
}

.contact-detail-item p {
    color: var(--dark-gray);
}

.contact-form-wrapper {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--black);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-success {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: #f0fdf4;
    border-radius: 12px;
    border: 2px solid #86efac;
}

.success-icon {
    font-size: 4rem;
    color: #22c55e;
    margin-bottom: var(--spacing-md);
}

.form-success h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.form-success p {
    color: var(--dark-gray);
}

.form-success a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
}

.form-success a:hover {
    text-decoration: underline;
}

.form-error {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: #fef2f2;
    border-radius: 12px;
    border: 2px solid #fecaca;
    margin-top: var(--spacing-md);
}

.error-icon {
    font-size: 4rem;
    color: #ef4444;
    margin-bottom: var(--spacing-md);
}

.form-error h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.form-error p {
    color: var(--dark-gray);
}

.form-error a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
}

.form-error a:hover {
    text-decoration: underline;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background-color: var(--black);
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #374151;
}

.footer-bottom p {
    color: #9ca3af;
}

/* ============================================
   Animations
   ============================================ */

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

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transform: translateX(-100%);
        transition: var(--transition);
        align-items: flex-start;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu a::after {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-header p {
        font-size: 1.125rem;
    }

    .services-grid,
    .products-grid,
    .services-detailed-grid {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .different-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .cta-title {
        font-size: 2rem;
    }

    .product-title {
        font-size: 2rem;
    }

    .product-icon-large {
        font-size: 4rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding: calc(70px + var(--spacing-lg)) var(--spacing-sm) var(--spacing-lg);
        min-height: 500px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .page-header {
        padding: calc(70px + var(--spacing-md)) var(--spacing-sm) var(--spacing-md);
    }
}