/* Reset e variáveis */
:root {
    --primary-color: #1a237e;
    --secondary-color: #43a047;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --text-color: #2c3e50;
    --text-muted: #6c757d;
    --border-color: #e3e6f0;
    --success-color: #2ecc71;
    --warning-color: #f1c40f;
    --danger-color: #e74c3c;
    --header-height: 60px;
    --bottom-nav-height: 60px;
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
.header {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

/* Navegação */
.nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover {
    background-color: var(--light-gray);
}

/* Menu inferior */
.bottom-nav {
    background-color: white;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    z-index: 1000;
}

.nav-item {
    text-align: center;
    padding: 0.5rem 0;
}

.nav-item .nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-color);
    text-decoration: none;
}

.nav-item .nav-link i {
    font-size: 1.2rem;
    margin-bottom: 0.2rem;
    margin-right: 0.5rem;
}

.nav-item .nav-link.active {
    color: var(--primary-color);
}

/* Cards */
.card {
    background: var(--card-background);
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

/* Estatísticas */
.stat-card {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Formulários */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    border-color: var(--border-color);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(26, 35, 126, 0.25);
}

/* Botões */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background-color: var(--hover-color);
    border-color: var(--hover-color);
    transform: translateY(-1px);
}

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

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--text-color);
}

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

/* Tabelas */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    background-color: var(--light-gray);
    color: var(--text-color);
    border-bottom-width: 1px;
}

.table td {
    vertical-align: middle;
}

/* Mensagens */
.messages {
    margin-bottom: 1rem;
}

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    border: none;
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.1);
    color: var(--success-color);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--danger-color);
}

.alert-warning {
    background-color: rgba(241, 196, 15, 0.1);
    color: var(--warning-color);
}

/* Animações */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Ajustes para o conteúdo principal */
main {
    margin-top: calc(var(--header-height) + 1rem);
    margin-bottom: calc(var(--bottom-nav-height) + 1rem);
    min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height));
}

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .card {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .stat-card {
        margin-bottom: 1rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }
}