:root {
    --primary-color: #1a5276;
    --secondary-color: #2980b9;
    --accent-color: #3498db;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #27ae60;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 85%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    align-items: center;
}

.logos {
    display: flex;
    align-items: center;
    margin-right: 20px;
}

.logo-img {
    height: 60px;
    margin-right: 15px;
}

.title-container {
    flex: 1;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.logo-subtitle {
    font-size: 0.9rem;
    font-style: italic;
    margin-top: -5px;
}

.ptti-logo-container {
    text-align: center;
    margin: 1rem 0 2rem;
}

/* Navigation */
nav {
    background-color: var(--secondary-color);
    padding: 0.5rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu {
    display: flex;
    list-style: none;
}

.menu li {
    position: relative;
}

.menu li a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: background-color 0.3s ease;
}

.menu li a:hover, .menu li a.active {
    background-color: var(--accent-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main Content */
main {
    padding: 2rem 0;
    min-height: 70vh;
}

.section-title {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

.card {
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.hero-image {
    margin: -1.5rem -1.5rem 1.5rem -1.5rem;
    border-radius: 5px 5px 0 0;
    overflow: hidden;
}

.full-width-img {
    width: 100%;
    height: auto;
    display: block;
}

.intro-text {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

/* Services grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.service-card {
    text-align: center;
    padding: 1.5rem;
    border-radius: 5px;
    background-color: var(--light-color);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.product-card {
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-content {
    padding: 1rem;
}

.product-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* Tabs */
.category-tab {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.category-tab button {
    padding: 0.75rem 1.5rem;
    background-color: #f0f0f0;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.category-tab button.active {
    background-color: var(--primary-color);
    color: white;
}

.category-tab button:hover {
    background-color: var(--secondary-color);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 3px;
    text-decoration: none;
    transition: background-color 0.3s ease;
    cursor: pointer;
    border: none;
    font-weight: 500;
}

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

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

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

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

.cta-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Forms */
form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-family: var(--font-main);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

/* Maps */
.map-container {
    border-radius: 5px;
    overflow: hidden;
    margin: 1.5rem 0;
}

/* Contact grid */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0;
    margin-top: 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-title {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--light-color);
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icons a {
    color: white;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.social-icons a:hover {
    transform: scale(1.2);
}

.copyright {
    margin-top: 2rem;
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Responsive Design */
@media (max-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logos {
        margin-right: 0;
        margin-bottom: 15px;
        justify-content: center;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .menu {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--secondary-color);
        z-index: 1000;
    }
    
    .menu.active {
        display: flex;
    }
    
    .cta-container {
        flex-direction: column;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}