/* Configurações Gerais */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f9f4;
    color: #2d4a22;
    transition: background 0.3s ease;
}

/* Header */
header {
    background-color: #2e7d32;
    color: white;
    padding: 1rem 5%;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

#theme-toggle {
    padding: 8px 16px;
    cursor: pointer;
    border: none;
    border-radius: 20px;
    background: #a5d6a7;
    font-weight: bold;
}

/* Seção Hero */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?auto=format&fit=crop&w=1000&q=80');
    background-size: cover;
    color: white;
}

/* Conteúdo */
.content {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 40px 5%;
    flex-wrap: wrap;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 280px;
    cursor: pointer;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-10px);
    border: 2px solid #2e7d32;
}

/* Alerta Dinâmico */
.hidden { display: none; }

#mensagem-alerta {
    margin: 20px auto;
    width: 80%;
    padding: 15px;
    background: #e8f5e9;
    border-left: 5px solid #2e7d32;
    text-align: center;
}

footer {
    text-align: center;
    padding: 20px;
    background: #1b5e20;
    color: white;
    position: fixed;
    bottom: 0;
    width: 100%;
}