body {
    padding: 20px;
    overflow-y: scroll;
}

.app-header {
    max-width: 1160px;
    margin: 0 auto 30px;
}

.app-title {
    margin: 0;
    font-size: 2rem;
    font-weight: 800;
}

.calculator-layout {
    width: min(100%, 1200px);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.panel {
    min-width: 0;
    padding: 20px;
}

.panel > h2,
.export-header,
.code-section > h2 {
    min-height: 48px;
    margin: 0 0 20px;
    display: flex;
    align-items: center;
}

input {
    width: 100%;
    min-width: 0;
    padding: 10px;
    margin: 0 0 20px;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    outline: none;
}

input:focus {
    border-color: var(--color-text);
}

input[aria-invalid="true"] {
    border-color: var(--color-danger);
}

.search-box {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: start;
    margin-bottom: 20px;
}

.search-box input {
    height: 32px;
    min-height: 32px;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
}

.button {
    appearance: none;
    min-height: 32px;
    padding: 5px 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    letter-spacing: 0;
    line-height: 1;
    text-align: center;
    text-transform: uppercase;
    white-space: nowrap;
}

.button:hover,
.button:focus-visible {
    background: var(--color-text);
    color: var(--color-background);
    outline: none;
}

.button:disabled {
    color: var(--color-muted);
    cursor: not-allowed;
    opacity: 0.65;
}

.button--fixed,
.button--danger {
    width: 90px;
}

.button--danger {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.button--remove {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: var(--color-text);
}

.button--remove:hover,
.button--remove:focus-visible {
    background: #b91c1c;
    border-color: #b91c1c;
    color: var(--color-text);
}

.button--export {
    background: var(--color-success);
    border-color: var(--color-success);
}

.button--export:hover,
.button--export:focus-visible {
    background: #059669;
    color: var(--color-text);
}

.button--icon {
    width: 32px;
    min-width: 32px;
    height: 32px;
    min-height: 32px;
    padding: 0;
    flex: 0 0 32px;
    font-weight: 700;
}

.regex-help {
    margin-top: 10px;
    margin-bottom: 20px;
    padding: 12px;
    border: 1px dashed var(--color-border);
    color: var(--color-muted);
}

.regex-help__grid {
    display: grid;
    gap: 8px;
}

.regex-help__grid p {
    margin: 0;
    display: grid;
    gap: 2px;
}

.regex-help code {
    color: var(--color-text);
}

.group {
    margin-bottom: 20px;
}

.group-header {
    position: relative;
    width: 100%;
    min-height: 48px;
    padding: 5px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
}

.group-header:hover,
.group-header:focus-visible {
    background: var(--color-surface);
    outline: none;
}

.group-header h3 {
    margin: 10px 0;
    font-size: 1.17rem;
}

.group-badge {
    position: absolute;
    top: -8px;
    left: -13px;
    z-index: 1;
    padding: 3px 7px;
    background: var(--color-sale-badge);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    transform: rotate(-12deg);
    transform-origin: center;
    pointer-events: none;
    animation: badge-pulse 1.8s ease-in-out infinite;
}

.toggle-icon {
    display: inline-block;
    width: 20px;
    margin-right: 15px;
    text-align: center;
    transition: transform 150ms ease;
}

.group:not(.is-open) .toggle-icon {
    transform: rotate(-90deg);
}

.group-content,
.dropdown-options {
    display: none;
}

.group.is-open .group-content {
    display: block;
}

.catalog-row {
    min-height: 50px;
    padding: 10px 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 14px;
    border-bottom: 1px dashed var(--color-border);
}

.catalog-row__title {
    min-width: 0;
    overflow-wrap: anywhere;
}

.catalog-row__price {
    min-width: 82px;
    display: inline-flex;
    justify-content: flex-end;
    gap: 7px;
    text-align: right;
}

.catalog-row.is-highlighted,
.dropdown-card.is-highlighted,
.choice-entry.is-highlighted,
.formula-entry.is-highlighted {
    background: var(--color-highlight);
}

.option-button.is-highlighted,
.choice-button.is-highlighted {
    background: var(--color-highlight);
    border-color: var(--color-text);
}

.dropdown-card {
    margin: 8px 0 12px;
}

.dropdown-offer {
    min-height: 48px;
    padding: 8px 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 128px 76px;
    align-items: center;
    gap: 8px;
    border-bottom: 1px dashed var(--color-border);
}

.dropdown-offer__title {
    min-width: 0;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.dropdown-offer__price {
    position: relative;
    width: 128px;
    min-width: 0;
    min-height: 32px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    font-size: 1rem;
    white-space: nowrap;
    text-align: right;
}

.dropdown-offer > .button {
    width: 76px;
    min-width: 76px;
    justify-self: end;
}

.dropdown-subheader {
    min-height: 30px;
    padding: 3px 0 3px 10px;
    display: flex;
    align-items: center;
    gap: 4px;
    border-left: 2px solid var(--color-border);
}

.dropdown-title {
    min-width: 0;
    flex: 1;
    padding: 3px 0;
    display: flex;
    align-items: center;
    gap: 4px;
    background: transparent;
    border: 0;
    color: #aaaaaa;
    cursor: pointer;
    font-size: 0.78rem;
    line-height: 1.3;
    text-align: left;
}

.dropdown-title:hover,
.dropdown-title:focus-visible {
    color: var(--color-text);
    outline: none;
}

.dropdown-toggle-icon {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    font-size: 0.8rem;
    line-height: 1;
    text-align: center;
    transform-origin: center;
    transition: rotate 220ms ease;
    will-change: rotate;
}

.dropdown-card.is-open .dropdown-options {
    padding: 2px 0 5px 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    border-left: 2px solid var(--color-border);
}

.option-button {
    padding: 5px 10px;
    display: inline-flex;
    align-items: center;
    gap: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
    user-select: none;
    transition: background-color 200ms ease, border-color 200ms ease;
}

.choice-button {
    min-height: 38px;
    padding: 7px 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
    transition: background-color 200ms ease, border-color 200ms ease;
}

.option-button:hover,
.option-button:focus-visible,
.choice-button:hover,
.choice-button:focus-visible {
    border-color: var(--color-text);
    outline: none;
}

.option-button.is-selected,
.choice-button.is-selected {
    background: var(--color-selected-background);
    border-color: var(--color-selected-border);
}

.option-button.is-selected.is-highlighted,
.choice-button.is-selected.is-highlighted {
    background: var(--color-selected-background);
    border-color: var(--color-selected-border);
}

.is-highlighted .button {
    background: transparent;
}

.is-highlighted .button:hover,
.is-highlighted .button:focus-visible {
    background: var(--color-text);
    color: var(--color-background);
}

.is-highlighted .button--remove,
.is-highlighted .button--remove:hover,
.is-highlighted .button--remove:focus-visible {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: var(--color-text);
}

.option-button__price {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    margin-left: 0.5em;
    text-align: right;
    white-space: nowrap;
}

.price-original {
    color: #666666;
    text-decoration: line-through;
}

.price-sale {
    color: var(--color-sale);
    font-weight: 700;
}

.original-price-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.sale-label {
    position: absolute;
    left: -6px;
    bottom: calc(100% - 1px);
    z-index: 1;
    padding: 2px 5px;
    background: var(--color-sale-badge);
    color: #ffffff;
    font-size: 0.68rem;
    font-weight: 700;
    transform: rotate(-10deg);
    animation: badge-pulse 1.8s ease-in-out infinite;
}

.choice-entry,
.formula-entry {
    padding: 12px 0;
    border-bottom: 1px dashed var(--color-border);
}

.entry-title {
    margin: 0;
    color: #cccccc;
    font-size: 0.9rem;
}

.choice-options {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 7px;
}

.formula-entry__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.formula-rule {
    color: var(--color-muted);
    font-size: 0.78rem;
    text-align: right;
}

.formula-controls {
    margin-top: 10px;
    display: grid;
    grid-template-columns: minmax(90px, 1fr) auto auto;
    align-items: center;
    gap: 10px;
}

.formula-input {
    margin: 0;
}

.formula-price {
    min-width: 80px;
    color: var(--color-success);
    font-weight: 700;
    text-align: right;
}

.export-area {
    padding: 10px;
}

.export-header {
    justify-content: space-between;
    gap: 12px;
}

.export-header h2 {
    margin: 0;
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.empty-message,
.status-message {
    margin: 0;
    padding: 20px 0;
    color: var(--color-muted);
    text-align: center;
}

.status-message:empty {
    display: none;
}

.status-message.is-error {
    color: var(--color-danger);
}

.cart-group-title {
    margin: 15px 0 5px;
    color: #cccccc;
    font-size: 0.9rem;
}

#cartContainer .cart-group-title:first-child {
    margin-top: 0;
}

.cart-row {
    min-height: 54px;
    padding: 10px 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 12px;
    border-bottom: 1px dashed var(--color-border);
}

.cart-row:last-of-type {
    border-bottom: 0;
}

.cart-row__description {
    min-width: 0;
    display: grid;
    gap: 4px;
    overflow-wrap: anywhere;
}

.cart-row__description--sale {
    position: relative;
    width: fit-content;
    max-width: 100%;
    padding-top: 8px;
}

.cart-row__description small {
    color: var(--color-muted);
}

.cart-sale-label {
    position: absolute;
    top: -7px;
    left: -8px;
    z-index: 1;
    padding: 2px 5px;
    background: var(--color-sale-badge);
    color: #ffffff;
    font-size: 0.68rem;
    font-weight: 700;
    line-height: 1;
    transform: rotate(-10deg);
    transform-origin: center;
    animation: badge-pulse 1.8s ease-in-out infinite;
}

.cart-row__description .cart-sale-label {
    color: #ffffff;
}

.cart-row__price-stack {
    min-width: 82px;
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: 7px;
    line-height: 1.2;
    white-space: nowrap;
    text-align: right;
}

.cart-row__price-stack .cart-row__total {
    min-width: auto;
}

.cart-row__total {
    min-width: 72px;
    text-align: right;
}

.export-area.is-exporting .cart-row {
    grid-template-columns: minmax(0, 1fr) auto;
}

.export-area.is-exporting .cart-row__price-stack,
.export-area.is-exporting .cart-row__total {
    justify-self: end;
}

.total-price {
    width: 100%;
    margin-top: 8px;
    padding-top: 8px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    border-top: 1px solid var(--color-border);
    font-size: 1rem;
    text-align: right;
}

.total-price__stack {
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: 7px;
    white-space: nowrap;
}

.code-section {
    margin-top: 20px;
}

.input-action {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: start;
}

hr {
    margin: 10px 0 20px;
    border: 0;
    border-top: 1px solid var(--color-border);
}

.flash-success {
    animation: flash-success 500ms ease-out;
}

@keyframes flash-success {
    50% {
        background: rgba(0, 255, 0, 0.2);
    }
}

@keyframes badge-pulse {
    0%,
    70%,
    100% {
        transform: rotate(-10deg) scale(1);
    }

    82% {
        transform: rotate(-10deg) scale(1.18);
    }

    92% {
        transform: rotate(-10deg) scale(0.96);
    }
}

@media (prefers-reduced-motion: reduce) {
    .group-badge,
    .sale-label,
    .cart-sale-label {
        animation: none;
    }
}

@media (max-width: 760px) {
    body {
        padding: 12px;
    }

    .calculator-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .panel {
        padding: 8px;
    }

    .catalog-row,
    .cart-row {
        grid-template-columns: minmax(0, 1fr) auto 76px;
        gap: 8px;
    }

    .catalog-row .button,
    .cart-row .button {
        width: 76px;
        min-width: 76px;
        justify-self: end;
    }

    .dropdown-offer {
        grid-template-columns: minmax(0, 1fr) auto 76px;
        gap: 6px;
    }

    .dropdown-offer__price {
        width: auto;
        min-width: 0;
        min-height: 32px;
        gap: 4px;
        font-size: 0.85rem;
    }

    .dropdown-offer .button {
        width: 76px;
        min-width: 76px;
        grid-column: 3;
    }

    .export-area.is-exporting .cart-row {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 8px;
    }

    .formula-entry__heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .formula-rule {
        text-align: left;
    }

    .formula-controls {
        grid-template-columns: minmax(80px, 1fr) auto;
    }

    .formula-controls .button {
        grid-column: 1 / -1;
    }
}