.tab-container {
    max-width: 420px;
    margin: 0 auto;
}
.tabs {
    display: flex;
    margin-bottom: 0;
    border-bottom: 2px solid var(--brand-soft);
}
.tab {
    flex: 1;
    padding: 12px 0;
    background-color: var(--surface);
    border: 2px solid var(--brand-soft);
    border-bottom: none;
    border-radius: 10px 10px 0 0;
    margin-right: 2px;
    cursor: pointer;
    font-weight: bold;
    color: var(--brand-primary);
    transition: background 0.3s ease;
}
.tab.active {
    background-color: var(--brand-soft);
    color: var(--text-primary);
}
.calculator {
    display: none;
    background-color: transparent;
    border: none;
    padding: 10px 0;
    text-align: center;
}
.calculator.active {
    display: block;
}
.calculator input[type="number"] {
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--border-soft);
    width: 80%;
    margin-bottom: 15px;
}
.calculator label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.result {
    background: var(--surface);
    border: 1px dashed var(--border-soft);
    border-radius: 10px;
    padding: 10px;
    margin-top: 15px;
}
.glitter {
    color: #2e7d6f;
    font-weight: bold;
    text-shadow: 0 0 8px #a7e6d7;
}
.cbkNames { display: inline-flex; align-items: center; }