body {
    background-color: #f6f6f6;
    font-family: 'Inter', sans-serif;
}

.header-logo {
    font-size: 1.6rem;
    letter-spacing: -1.2px;
}

.card {
    border-radius: 16px;
    border: 1px solid rgba(0,0,0,0.08) !important;
}

.sticky-top {
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

/* Estilo Botões de Valor */
.preset-btn {
    font-weight: 600;
    border-radius: 8px;
    padding: 12px 5px;
    font-size: 0.85rem;
    border-color: #dee2e6;
    color: #333;
    transition: all 0.2s;
}

.preset-btn:hover {
    background-color: #f8f9fa;
    border-color: #000;
    color: #000;
}

.preset-btn.active {
    background-color: #000 !important;
    color: #fff !important;
    border-color: #000 !important;
}

/* Customização Input */
.input-group-text {
    border-color: #dee2e6;
    font-weight: bold;
}

.form-control:focus {
    border-color: #000;
    box-shadow: none;
}

.btn-dark {
    background-color: #000;
    border-radius: 8px;
}

.bg-light-subtle {
    background-color: #f8f9fa;
    border: 1px dashed #ced4da !important;
}

#pixCode {
    font-family: monospace;
    font-size: 0.8rem;
}