.pro-calc-wrapper {
    --pc-bg: #ffffff;
    --pc-fg: #0f172a;
    --pc-muted: #64748b;
    --pc-accent: #3b82f6;
    --pc-surface: #f1f5f9;
    --pc-border: #e2e8f0;
    --pc-shadow: 0 10px 25px rgba(2,6,23,.08);
    display: inline-block;
    width: 100%;
    max-width: 340px;
}
.pro-calc-wrapper[data-theme="dark"],
@media (prefers-color-scheme: dark) {
  .pro-calc-wrapper[data-theme="auto"] {
    --pc-bg: #0b1220;
    --pc-fg: #e5e7eb;
    --pc-muted: #9ca3af;
    --pc-accent: #60a5fa;
    --pc-surface: #111827;
    --pc-border: #1f2937;
    --pc-shadow: 0 10px 25px rgba(0,0,0,.4);
  }
}
.pro-calc-card {
    background: var(--pc-bg);
    color: var(--pc-fg);
    border: 1px solid var(--pc-border);
    border-radius: 16px;
    box-shadow: var(--pc-shadow);
    padding: 16px;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol";
}
.pro-calc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}
.pro-calc-title {
    font-weight: 600;
    letter-spacing: .2px;
}
.pro-calc-display {
    background: var(--pc-surface);
    border: 1px solid var(--pc-border);
    border-radius: 12px;
    padding: 10px 12px;
    margin-bottom: 10px;
    min-height: 70px;
    display: grid;
    grid-template-rows: auto auto;
    align-items: end;
}
.pro-calc-expression {
    color: var(--pc-muted);
    font-size: 12px;
    min-height: 18px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.pro-calc-value {
    font-size: 28px;
    font-variant-numeric: tabular-nums;
    text-align: right;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.pro-calc-keypad {
    display: grid;
    gap: 8px;
}
.pro-calc-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.pro-calc-btn {
    appearance: none;
    border: 1px solid var(--pc-border);
    background: var(--pc-bg);
    color: var(--pc-fg);
    border-radius: 12px;
    padding: 10px;
    font-size: 16px;
    cursor: pointer;
    box-shadow: 0 1px 0 rgba(0,0,0,.02);
    transition: transform .02s ease, background .15s ease, border-color .15s ease;
    user-select: none;
}
.pro-calc-btn:active {
    transform: translateY(1px);
}
.pro-calc-btn:hover {
    background: var(--pc-surface);
}
.pro-calc-op { border-color: rgba(59,130,246,.4); }
.pro-calc-equals {
    background: var(--pc-accent);
    color: white;
    border-color: transparent;
}
.pro-calc-equals:hover {
    filter: brightness(1.03);
}
.pro-calc-func {
    color: var(--pc-muted);
}
.pro-calc-footer {
    margin-top: 8px;
    color: var(--pc-muted);
    text-align: center;
    font-size: 12px;
}