/* Reset e Variáveis CSS */
:root {
    --verde: #28a745;
    --laranja: #fd7e14;
    --cinza: #6c757d;
    --vermelho: #dc3545;
    --azul: #007bff;
    --branco: #ffffff;
    --preto: #212529;
    --cinza-claro: #f8f9fa;
    --cinza-medio: #e9ecef;
    --sombra: 0 2px 8px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--cinza-claro);
    color: var(--preto);
    line-height: 1.6;
}

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

/* Navbar */
.navbar {
    background: var(--branco);
    box-shadow: var(--sombra);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--verde);
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.navbar-menu a {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 15px;
    color: var(--cinza);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.navbar-menu a:hover {
    background: var(--cinza-claro);
    color: var(--verde);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-logout {
    padding: 8px 15px;
    background: var(--vermelho);
    color: var(--branco);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.btn-logout:hover {
    background: #c82333;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 140px);
    padding: 30px;
}

/* Footer */
.footer {
    background: var(--branco);
    padding: 20px;
    text-align: center;
    color: var(--cinza);
    box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
}

/* Alertas */
.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: opacity 0.3s;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.btn-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.5;
}

.btn-close:hover {
    opacity: 1;
}

/* Responsivo */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .navbar-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-menu a {
        width: 100%;
    }
}