:root {
    --primary: #2d6a4f;
    --primary-dark: #1b4332;
    --secondary: #52b788;
    --light: #d8f3dc;
    --bg: #f8f9fa;
    --text: #212529;
    --muted: #6c757d;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Navbar */
.navbar-nature {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-nature .navbar-brand,
.navbar-nature .nav-link {
    color: #fff !important;
}

.navbar-nature .nav-link:hover,
.navbar-nature .nav-link.active {
    color: var(--light) !important;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-weight: 700;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Cards */
.card-nature {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.card-nature:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.card-nature .card-img-top {
    border-radius: 16px 16px 0 0;
}

/* Buttons */
.btn-nature {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 24px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-nature:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline-nature {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
    border-radius: 8px;
    padding: 8px 22px;
    font-weight: 500;
}

.btn-outline-nature:hover {
    background: var(--primary);
    color: #fff;
}

/* Footer */
.footer-nature {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.8);
    padding: 40px 0;
    margin-top: auto;
}

/* Content */
.content img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.badge-nature {
    background: var(--light);
    color: var(--primary-dark);
    font-weight: 500;
}

/* 404 */
.error-404 {
    text-align: center;
    padding: 100px 0;
}

.error-404 h1 {
    font-size: 6rem;
    color: var(--secondary);
    font-weight: 700;
}