:root {
    --primary-color: #0d2c4f; /* Deep sea blue */
    --secondary-color: #ffffff; /* White */
    --accent-color: #ff6b6b; /* A vibrant coral/red for accents */
    --text-color: #333333;
    --light-gray: #f4f4f4;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Lato', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--secondary-color);
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    text-align: center;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

/* --- Header --- */
.header {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-svg {
    color: var(--accent-color);
}

.nav a {
    color: var(--primary-color);
    margin-left: 1.5rem;
    font-weight: 700;
    transition: color 0.3s ease;
}

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

/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(13, 44, 79, 0.8), rgba(13, 44, 79, 0.8)), url(https://images.unsplash.com/photo-1593452395539-955a303632b9?q=80&w=2070) center/cover no-repeat;
    color: var(--secondary-color);
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 700;
    text-transform: uppercase;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--secondary-color);
}
.btn-primary:hover {
    transform: translateY(-3px);
}

/* --- General Sections --- */
.about-section, .features-section, .gallery-section, .cta-section {
    padding: 4rem 0;
}

.about-section p {
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
}

/* --- Features Section --- */
.features-section {
    background-color: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    margin-bottom: 1rem;
}

.feature-icon svg {
    width: 50px;
    height: 50px;
    color: var(--accent-color);
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

/* --- Gallery Section --- */
.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.placeholder-img {
    background-color: #e0e7ff;
    border: 2px dashed var(--primary-color);
    border-radius: 8px;
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
}
.placeholder-img p {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0;
}

.gallery-item h4 {
    text-align: center;
}

/* --- CTA Section --- */
.cta-section {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    text-align: center;
}

.cta-section h2 {
    color: var(--secondary-color);
}

.cta-section p {
    opacity: 0.9;
    margin-bottom: 2rem;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}
.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--secondary-color);
    transform: translateY(-3px);
}

/* --- Footer --- */
.footer {
    background-color: var(--light-gray);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
    border-top: 1px solid #ddd;
}
.footer a {
    font-weight: bold;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .nav {
        display: none; /* Simple solution for mobile, can be replaced with a hamburger menu */
    }
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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