:root {
    --primary-color: #8B4513;
    /* SaddleBrown */
    --secondary-color: #D2691E;
    /* Chocolate */
    --accent-color: #556B2F;
    /* DarkOliveGreen */
    --background-color: #FFF8F0;
    /* FloralWhite */
    --text-color: #333333;
    --light-text: #FFFFFF;
    --card-bg: #FFFFFF;
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Nunito', sans-serif;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

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

.logo img {
    height: 50px;
    margin-right: 10px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

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

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

.donate-btn {
    background-color: var(--secondary-color);
    color: var(--light-text) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    transition: transform 0.2s;
}

.donate-btn:hover {
    transform: scale(1.05);
    background-color: #b35515;
}

/* Hero Section */
.hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)), url('../images/hero_pets.png');
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--light-text);
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3rem;
    color: var(--light-text);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.cta-button {
    background-color: var(--accent-color);
    color: var(--light-text);
    padding: 1rem 2rem;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
}

.cta-button:hover {
    background-color: #3e4f22;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

/* Features / Mission */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Footer */
footer {
    background-color: #2c2c2c;
    color: #e0e0e0;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--light-text);
    margin-bottom: 1rem;
}

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

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 1rem;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    padding: 0.5rem;
    border-radius: 4px;
    border: none;
    flex: 1;
}

.newsletter-form button {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}

.copyright {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 1rem;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Mobile menu implementation needed later */
    }

    .hero-content h1 {
        font-size: 2rem;
    }
}