/* --- CSS STYLES --- */
:root {
    --primary-color: #0a2351; /* Deep Navy */
    --secondary-color: #ff6b35; /* Professional Orange */
    --text-dark: #333;
    --text-light: #666;
    --white: #ffffff;
    --bg-gray: #f4f7f6;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-gray);
    overflow-x: hidden;
}

/* Navigation */
nav {
    background: var(--white);
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.logo span {
    color: var(--secondary-color);
}

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

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

/* Content Sections */
section {
    padding: 100px 8% 60px;
    min-height: 100vh;
    display: none; /* Hidden by default for SPA logic */
    animation: fadeIn 0.5s ease-in;
}

section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Home Page - Hero Section */
#home {
    background: linear-gradient(rgba(10, 35, 81, 0.8), rgba(10, 35, 81, 0.8)),
                url('https://images.unsplash.com/photo-1521737711867-e3b97375f902?auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
}

.btn {
    padding: 15px 35px;
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn:hover {
    background: #e55a2b;
    transform: scale(1.05);
}

/* Products Page - Cards */
.page-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.service-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

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

.contact-info {
    background: var(--primary-color);
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-item i {
    margin-right: 15px;
    color: var(--secondary-color);
}

/* POPUP MODAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: none; /* Hidden initially */
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
    from { transform: translateY(-50px); opacity: 0; }
    to   { transform: translateY(0);     opacity: 1; }
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.modal-content h2 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.modal-content p {
    margin-bottom: 20px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .nav-links       { display: none; } /* Simplified for demo */
    .about-container { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 2.2rem; }
}