body {
    background-color: #f8f9fa;
    font-family: 'Roboto', sans-serif;
    color: #202124;
}

.header {
    border-bottom: 1px solid #e0e0e0;
}

.logo {
    font-size: 2.5rem;
    font-weight: 900;
    color: #000;
}

.logo-highlight {
    color: #fff;
    background-color: #000;
    padding: 0 4px;
    border-radius: 2px;
}

.header-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #45434c;
    letter-spacing: -0.5px;
}

.card {
    border-radius: 8px;
}

.form-label {
    font-size: 0.875rem;
    color: #5f6368;
}

.required::after {
    content: " *";
    color: #d93025;
}

.form-control {
    border-radius: 4px;
    border: 1px solid #dadce0;
    padding: 0.75rem;
}

.form-control:focus {
    border-color: #45434c;
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.15);
}

.result-area {
    background-color: #f1f3f4;
    font-family: 'Roboto Mono', monospace;
    color: #45434c;
    border: 1px solid #dadce0;
    border-radius: 4px;
}

.btn-primary {
    background-color: #45434c;
    border-color: #45434c;
    border-radius: 4px;
    padding: 0.75rem;
}

.btn-primary:hover {
    background-color: #45434c;
}

.table {
    font-size: 0.875rem;
}

.table th {
    background-color: #f8f9fa;
    color: #5f6368;
}

.table td, .table th {
    padding: 0.75rem;
    vertical-align: middle;
}

.text-primary {
    color: #45434c !important;
}

.text-muted {
    color: #5f6368 !important;
}

.is-invalid {
    border-color: #d93025 !important;
}