:root {
    --primary: #0d6efd;
    --danger: #dc3545;
    --success: #198754;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --radius: 10px;
    --shadow: 0 2px 8px rgba(0,0,0,0.05);
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light);
    color: var(--dark);
    min-height: 100vh;
}

a {
    text-decoration: none;
}

h2 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

/* Navbar */
.navbar {
    background-color: var(--primary);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar a {
    color: white;
    font-weight: 500;
    margin-left: 1rem;
}

.main-container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* Botões */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
}

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

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

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

.btn:hover {
    opacity: 0.9;
}

/* Formulários */
.form-control, .form-select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: var(--radius);
    background-color: #fff;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

/* Tabelas */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background-color: white;
}

.table th, .table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

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

.table tbody tr:hover {
    background-color: #f1f1f1;
}

/* Alertas */
.alert {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
}

.alert-warning {
    background-color: #fff3cd;
    color: #664d03;
}

.alert-danger {
    background-color: #f8d7da;
    color: #842029;
}

/* Responsivo */
@media (max-width: 768px) {
    .main-container {
        margin: 1rem;
        padding: 1rem;
    }

    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar a {
        margin: 0.25rem 0 0;
    }
}