/* --- Color Palette Variables --- */
:root {
    --primary-blue: #0f4c81;
    --secondary-blue: #1d70b8;
    --accent-red: #d9232a;
    --accent-yellow: #f4b216;
    --dark-neutral: #1a2530;
    --light-neutral: #f8f9fa;
    --white: #ffffff;
    --gray: #6c757d;
}

/* --- Global Reset & Base Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--light-neutral);
    color: var(--dark-neutral);
    line-height: 1.6;
}

/* --- Navigation Bar --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.logo-container img {
    height: 50px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-neutral);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-red);
    transition: width 0.3s ease;
}

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

/* --- Hero Section --- */
#home {
    padding-top: 80px;
    min-height: 90vh;
    background: linear-gradient(135deg, rgba(15,76,129,0.95) 0%, rgba(29,112,184,0.85) 100%), url('https://unsplash.com') no-repeat center center/cover;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-inner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-inner h1 span {
    color: var(--accent-yellow);
}

.hero-inner p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--accent-red);
    color: var(--white);
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    border-radius: 4px;
    transition: background 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:hover {
    background-color: #b31b20;
}

/* --- Section Common Layout --- */
section {
    padding: 100px 20px 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 15px;
    color: var(--primary-blue);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--accent-yellow);
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--secondary-blue);
    margin-bottom: 15px;
}

.about-text p {
    margin-bottom: 20px;
    color: #4a5568;
}

.about-accent-box {
    border-left: 5px solid var(--accent-red);
    padding-left: 20px;
    font-style: italic;
    background: rgba(217, 35, 42, 0.05);
    padding: 15px;
}

/* --- Products Section --- */
#products {
    background-color: var(--white);
    max-width: 100%;
    width: 100%;
}

.products-container {
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-block {
    margin-bottom: 60px;
}

.portfolio-block h3 {
    font-size: 1.8rem;
    color: var(--white);
    background: var(--primary-blue);
    padding: 12px 20px;
    margin-bottom: 30px;
    border-radius: 4px;
    border-left: 6px solid var(--accent-yellow);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.product-card {
    background: var(--light-neutral);
    border-radius: 6px;
    padding: 25px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    border-top: 4px solid var(--secondary-blue);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.product-card h4 {
    color: var(--dark-neutral);
    font-size: 1.25rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-card ul {
    list-style-type: none;
}

.product-card li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: #4a5568;
}

.product-card li::before {
    content: "▪";
    color: var(--accent-red);
    position: absolute;
    left: 0;
    top: 0;
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    background-color: var(--white);
    padding: 40px;
    border-radius: 6px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.info-item {
    margin-bottom: 25px;
}

.info-item h4 {
    color: var(--primary-blue);
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.contact-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 6px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--secondary-blue);
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.3s ease;
}

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

/* --- Footer --- */
footer {
    background-color: var(--dark-neutral);
    color: var(--white);
    text-align: center;
    padding: 30px 20px;
    font-size: 0.9rem;
    border-top: 5px solid var(--accent-yellow);
}

/* --- Responsive Queries --- */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    .nav-links {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero-inner h1 {
        font-size: 2rem;
    }
}