:root {
    --primary-color: #0077b6; /* Ocean Blue */
    --secondary-color: #f77f00; /* Sunset Orange */
    --dark-color: #333;
    --light-color: #f4f4f4;
    --white: #fff;
    --text-color: #4a4a4a;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

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

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-color);
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Utilities */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #023e8a;
    color: var(--white);
}

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

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

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.text-center { text-align: center; }
.bg-light { background-color: var(--light-color); }

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-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(--dark-color);
}

.logo .highlight {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    color: var(--dark-color);
    font-weight: 600;
}

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

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

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

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('https://images.unsplash.com/photo-1534237710431-e2fc698436d0?auto=format&fit=crop&w=1600&q=80') no-repeat center center/cover;
    height: 80vh; /* Viewport height */
    position: relative;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* Dark overlay */
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.hero-btns .btn {
    margin: 0.5rem;
}

/* Sections */
.section {
    padding: 4rem 0;
}

.row {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.col-text { flex: 1; }
.col-img { flex: 1; }

.col-img img {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    margin-top: 1rem;
}

.link-arrow i {
    margin-left: 0.5rem;
    font-size: 0.8rem;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

/* Feature Cards */
.card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

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

/* Impact Section */
.impact {
    background-color: var(--white);
}

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

.stat-item .number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-item .label {
    font-size: 1.1rem;
    color: var(--text-color);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), #00b4d8);
    color: var(--white);
    text-align: center;
}

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

/* Footer */
footer {
    background: var(--dark-color);
    color: #ccc;
    padding-top: 3rem;
}

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

footer h3, footer h4 {
    color: var(--white);
    margin-bottom: 1.2rem;
}

footer a {
    color: #ccc;
}

footer a:hover {
    color: var(--white);
}

.socials a {
    margin-right: 1rem;
    font-size: 1.2rem;
}

.footer-bottom {
    background: #222;
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    
    .mobile-menu-btn { display: block; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }
    
    .nav-links.active { display: flex; }
    
    .nav-links li {
        margin: 0;
        text-align: center;
        width: 100%;
    }
    
    .nav-links a {
        display: block;
        padding: 1rem;
    }
    
    .row { flex-direction: column; }
}