.shtefanart-calc {
    --sc-page-bg: #f3f4f6;
    --sc-card-bg: #ffffff;
    --sc-border: #e5e7eb;
    --sc-border-strong: #d1d5db;
    --sc-text: #111827;
    --sc-muted: #6b7280;
    --sc-accent: #111827;
    --sc-accent-fg: #ffffff;
    --sc-hover: #f9fafb;
    --sc-radius: 12px;
    --sc-gap: 14px;
    --sc-sidebar-top: 150px;
    color: var(--sc-text);
    font-family: inherit;
    background: var(--sc-page-bg);
    padding: 20px;
    border-radius: var(--sc-radius);
    max-width: 1180px;
    margin: 0 auto;
}
.shtefanart-calc *, .shtefanart-calc *::before, .shtefanart-calc *::after { box-sizing: border-box; }
.shtefanart-calc [hidden] { display: none !important; }

/* === Layout: 2 columns === */
.shtefanart-calc__layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 20px;
    align-items: start;
}
@media (max-width: 900px) {
    .shtefanart-calc__layout { grid-template-columns: 1fr; }
}

/* === Main column (fields) === */
.shtefanart-calc__fields {
    display: flex;
    flex-direction: column;
    gap: var(--sc-gap);
}

.shtefanart-calc__field {
    background: var(--sc-card-bg);
    border: 1px solid var(--sc-border);
    border-radius: var(--sc-radius);
    padding: 16px 18px;
}
.shtefanart-calc__field[hidden] { display: none !important; }

.shtefanart-calc__label {
    display: block;
    font-weight: 600;
    font-size: 16px;
    line-height: 1.35;
    margin: 0 0 4px;
}
.shtefanart-calc__req { color: #dc2626; margin-left: 2px; }
.shtefanart-calc__desc {
    color: var(--sc-muted);
    font-size: 13px;
    line-height: 1.45;
    margin: 0 0 12px;
}

.shtefanart-calc__options { display: flex; flex-direction: column; gap: 8px; }
.shtefanart-calc__opt {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--sc-border);
    border-radius: 8px;
    cursor: pointer;
    background: var(--sc-card-bg);
    transition: background .12s, border-color .12s;
}
.shtefanart-calc__opt:hover { background: var(--sc-hover); border-color: var(--sc-border-strong); }
.shtefanart-calc__opt input { margin-top: 3px; flex-shrink: 0; accent-color: var(--sc-accent); }
.shtefanart-calc__opt:has(input:checked) { border-color: var(--sc-accent); background: var(--sc-hover); }

.shtefanart-calc__opt-text { display: flex; flex-direction: column; gap: 2px; flex: 1; font-size: 14px; line-height: 1.4; }
.shtefanart-calc__opt-price { font-size: 13px; color: var(--sc-muted); }
.shtefanart-calc__opt-hint  { font-size: 12px; color: var(--sc-muted); font-style: italic; }

.shtefanart-calc__qty { display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.shtefanart-calc__qty input {
    width: 80px;
    padding: 8px 10px;
    text-align: center;
    border: 1px solid var(--sc-border-strong);
    border-radius: 8px;
    font-size: 15px;
    -moz-appearance: textfield;
    background: var(--sc-card-bg);
}
.shtefanart-calc__qty input::-webkit-outer-spin-button,
.shtefanart-calc__qty input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.shtefanart-calc__qty-btn {
    width: 36px; height: 36px;
    border: 1px solid var(--sc-border-strong);
    background: var(--sc-card-bg);
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    line-height: 1;
}
.shtefanart-calc__qty-btn:hover { background: var(--sc-hover); }
.shtefanart-calc__qty-hint { color: var(--sc-muted); font-size: 13px; }

.shtefanart-calc__textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--sc-border-strong);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    resize: vertical;
    background: var(--sc-card-bg);
}

/* === Sidebar === */
.shtefanart-calc__sidebar {
    position: sticky;
    top: var(--sc-sidebar-top);
    align-self: start;
}
.shtefanart-calc__sidebar-inner {
    background: var(--sc-card-bg);
    border: 1px solid var(--sc-border);
    border-radius: var(--sc-radius);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: calc(100vh - var(--sc-sidebar-top) - 20px);
    overflow-y: auto;
}
@media (max-width: 900px) {
    .shtefanart-calc__sidebar { position: static; }
    .shtefanart-calc__sidebar-inner { max-height: none; }
}

.shtefanart-calc__sidebar-title {
    margin: 0;
    font-size: 17px;
    font-weight: 600;
}

.shtefanart-calc__summary-empty {
    color: var(--sc-muted);
    font-size: 14px;
    padding: 10px 0;
    text-align: center;
}
.shtefanart-calc__summary-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.shtefanart-calc__summary-list li {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 10px;
    background: var(--sc-hover);
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.35;
}
.shtefanart-calc__summary-label {
    color: var(--sc-muted);
    font-size: 12px;
}
.shtefanart-calc__summary-row {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: baseline;
}
.shtefanart-calc__summary-value {
    flex: 1;
    word-break: break-word;
}
.shtefanart-calc__summary-price {
    color: var(--sc-text);
    font-weight: 500;
    white-space: nowrap;
}

.shtefanart-calc__total {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 12px 0;
    border-top: 1px solid var(--sc-border);
    font-size: 15px;
    font-weight: 500;
}
.shtefanart-calc__total-value {
    font-size: 22px;
    font-weight: 700;
}

.shtefanart-calc__open-contacts,
.shtefanart-calc__submit {
    background: var(--sc-accent);
    color: var(--sc-accent-fg);
    border: 0;
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity .15s;
    width: 100%;
    font-family: inherit;
}
.shtefanart-calc__open-contacts:hover,
.shtefanart-calc__submit:hover { opacity: .88; }
.shtefanart-calc__open-contacts:disabled,
.shtefanart-calc__submit:disabled { opacity: .5; cursor: not-allowed; }

.shtefanart-calc__cancel {
    background: transparent;
    color: var(--sc-muted);
    border: 0;
    padding: 8px;
    font-size: 13px;
    cursor: pointer;
    width: 100%;
    font-family: inherit;
}
.shtefanart-calc__cancel:hover { color: var(--sc-text); }

/* === Contacts (hidden until button click) === */
.shtefanart-calc__contacts {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 12px;
    border-top: 1px solid var(--sc-border);
}
.shtefanart-calc__contacts h4 {
    margin: 0 0 4px;
    font-size: 14px;
    font-weight: 600;
}
.shtefanart-calc__contacts label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--sc-muted);
}
.shtefanart-calc__contacts input {
    padding: 10px 12px;
    border: 1px solid var(--sc-border-strong);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: var(--sc-card-bg);
}
.shtefanart-calc__select {
    padding: 10px 12px;
    border: 1px solid var(--sc-border-strong);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: var(--sc-card-bg);
    color: var(--sc-text);
    cursor: pointer;
}

.shtefanart-calc__consent {
    flex-direction: row !important;
    align-items: flex-start;
    gap: 8px !important;
    color: var(--sc-text) !important;
    font-size: 13px !important;
    line-height: 1.4;
    cursor: pointer;
}
.shtefanart-calc__consent input[type="checkbox"] {
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--sc-accent);
    width: auto;
}
.shtefanart-calc__consent a {
    color: var(--sc-accent);
    text-decoration: underline;
}
.shtefanart-calc__consent a:hover { opacity: .8; }

.shtefanart-calc__message {
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.4;
}
.shtefanart-calc__message[data-type="success"] { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.shtefanart-calc__message[data-type="error"]   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }