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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px 30px;
}

header h1 {
    font-size: 28px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

nav {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.1);
}

.nav-link:hover, .nav-link.active {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

main {
    padding: 30px;
}

.secao {
    display: none;
}

.secao.ativa {
    display: block;
}

h2 {
    color: #333;
    margin-bottom: 25px;
    font-size: 24px;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card.alert {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-icon {
    font-size: 48px;
    opacity: 0.9;
}

.stat-info h3 {
    font-size: 36px;
    margin-bottom: 5px;
}

.stat-info p {
    opacity: 0.9;
    font-size: 14px;
}

/* Upload Area */
.upload-area {
    border: 3px dashed #667eea;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #f8f9ff;
    margin-bottom: 30px;
}

.upload-area:hover {
    background: #f0f2ff;
    border-color: #764ba2;
}

.upload-area i {
    font-size: 64px;
    color: #667eea;
    margin-bottom: 15px;
}

.upload-area p {
    color: #666;
    font-size: 16px;
    margin: 5px 0;
}

.upload-hint {
    font-size: 12px !important;
    color: #999 !important;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

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

/* Filtros */
.filtros {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.filtros select {
    padding: 10px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    min-width: 150px;
}

/* Listas */
.documentos-lista, .fornecedores-lista, .alertas-lista {
    display: grid;
    gap: 15px;
}

.documento-item, .fornecedor-item, .alerta-item {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.documento-item:hover, .fornecedor-item:hover, .alerta-item:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transform: translateX(5px);
}

.alerta-item {
    border-left-color: #f5576c;
}

.item-info h4 {
    color: #333;
    margin-bottom: 8px;
}

.item-info p {
    color: #666;
    font-size: 14px;
    margin: 3px 0;
}

.item-actions {
    display: flex;
    gap: 10px;
}

/* Formulários */
.form-email, .form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background: white;
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    animation: slideDown 0.3s;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 20px;
}

.close:hover {
    color: #333;
}

/* Chart */
.chart-container {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.chart-container h3 {
    margin-bottom: 20px;
    color: #333;
}

/* Animações */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.loading i {
    font-size: 48px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filtros {
        flex-direction: column;
    }
    
    .filtros select {
        width: 100%;
    }
}