/* Configurações Globais Modernas */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
    background-color: #111827;
    color: #f3f4f6;
}

header {
    background-color: #1f2937;
    padding: 20px;
    border-bottom: 3px solid #4b5563;
    text-align: center;
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Sistema de Abas */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-btn {
    background-color: #374151;
    color: #f3f4f6;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
}

.tab-btn.active, .tab-btn:hover {
    background-color: #4ade80;
    color: #111827;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Cards de Configuração Fixa */
.card-config {
    background-color: #1f2937;
    padding: 24px;
    border-radius: 8px;
    border: 1px solid #374151;
    max-width: 500px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #9ca3af;
}

.input-group input {
    width: 100%;
    padding: 10px;
    background-color: #374151;
    border: 1px solid #4b5563;
    color: #4ade80;
    border-radius: 4px;
    font-weight: bold;
}