.product-page {
    min-height: calc(100vh - 140px);
    padding-block: 58px 80px;
}

.product-back {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 28px;
    color: var(--muted);
    text-decoration: none;
    font-weight: 700;
}

.product-back:hover {
    color: var(--brand);
}

.product-grid {
    display: grid;
    align-items: start;
    gap: 28px;
    grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
}

.product-intro {
    padding: 10px 10px 10px 0;
}

[dir="rtl"] .product-intro {
    padding-right: 0;
    padding-left: 10px;
}

.product-icon {
    display: grid;
    width: 68px;
    height: 68px;
    margin-bottom: 26px;
    place-items: center;
    border: 1px solid rgba(85, 216, 193, 0.32);
    border-radius: 22px;
    color: var(--brand);
    background: rgba(85, 216, 193, 0.09);
    font-size: 1.7rem;
    font-weight: 900;
}

.product-intro h1 {
    margin-bottom: 18px;
    font-size: clamp(2.2rem, 5vw, 4.3rem);
    line-height: 1.08;
}

.product-description {
    max-width: 600px;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.85;
}

.product-note {
    max-width: 600px;
    margin-top: 28px;
    padding: 16px 18px;
    border-inline-start: 3px solid var(--accent);
    color: #d8e3f0;
    background: rgba(244, 189, 96, 0.07);
    line-height: 1.7;
}

.product-calculator {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background: linear-gradient(145deg, rgba(20, 42, 66, 0.96), rgba(10, 25, 42, 0.94));
    box-shadow: var(--shadow);
}

.product-form {
    display: grid;
    gap: 20px;
}

.product-field {
    display: grid;
    gap: 9px;
}

.product-field-label {
    color: #dce7f4;
    font-size: 0.9rem;
    font-weight: 800;
}

.product-control {
    display: flex;
    align-items: center;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(4, 14, 26, 0.55);
    transition:
        border-color 160ms ease,
        box-shadow 160ms ease;
}

.product-control:focus-within {
    border-color: var(--brand);
    box-shadow: 0 0 0 4px rgba(85, 216, 193, 0.1);
}

.product-control input,
.product-control select,
.product-control textarea {
    width: 100%;
    min-height: 58px;
    padding: 0 17px;
    border: 0;
    outline: 0;
    color: var(--text);
    background: transparent;
    font: inherit;
    font-size: 1.05rem;
}

.product-control input[type="file"] {
    min-height: auto;
    padding-block: 15px;
    cursor: pointer;
}

.product-control input[type="file"]::file-selector-button {
    margin-inline-end: 12px;
    padding: 9px 13px;
    border: 0;
    border-radius: 10px;
    background: rgba(85, 216, 193, 0.14);
    color: var(--brand);
    cursor: pointer;
    font: inherit;
    font-weight: 800;
}

.product-control select {
    appearance: none;
    cursor: pointer;
}

.product-file-chips {
    display: grid;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.product-file-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 9px 13px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(4, 14, 26, 0.4);
    color: var(--text);
    font-size: 0.9rem;
}

.product-file-chip-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
}

.product-file-chip-remove:hover {
    background: rgba(255, 99, 99, 0.2);
    color: #ff6363;
}

.product-control select option {
    color: var(--text);
    background: var(--background);
}

.product-control input::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

.product-unit {
    padding-inline: 16px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 800;
}

.product-submit {
    min-height: 56px;
    margin-top: 4px;
    border: 0;
}

.product-result {
    margin-top: 22px;
    padding: 24px;
    border: 1px solid rgba(85, 216, 193, 0.3);
    border-radius: 20px;
    outline: none;
    background: rgba(85, 216, 193, 0.08);
}

.product-progress {
    margin-top: 18px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(4, 14, 26, 0.4);
    overflow: hidden;
}

.product-progress[hidden] {
    display: none;
}

.product-progress-bar {
    position: relative;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
    margin-bottom: 10px;
}

.product-progress-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    width: 40%;
    border-radius: 999px;
    background: var(--brand, #55d8c1);
    animation: product-progress-slide 1.2s ease-in-out infinite;
}

.product-progress-label {
    font-size: 0.85rem;
    opacity: 0.8;
}

@keyframes product-progress-slide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

.product-result[hidden] {
    display: none;
}

.product-result.is-error {
    border-color: rgba(248, 113, 113, 0.4);
    background: rgba(248, 113, 113, 0.08);
}

.product-result.is-error .product-result-value {
    color: #f87171;
}

.product-result-details {
    opacity: 0.75;
    font-size: 0.9em;
}

.product-result-value,
.product-result-label,
.product-result-details {
    display: block;
}

.product-result-preview {
    display: block;
    width: 100%;
    max-height: 420px;
    margin-top: 20px;
    border-radius: 16px;
    object-fit: contain;
    background: rgba(4, 14, 26, 0.45);
}

.product-result-preview[hidden],
.product-download[hidden] {
    display: none;
}

.product-download {
    display: inline-flex;
    margin-top: 18px;
    text-decoration: none;
}

.product-submit:disabled {
    cursor: wait;
    opacity: 0.72;
}

.product-result-value {
    color: var(--brand);
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.product-result-label {
    margin-top: 12px;
    font-size: 1.08rem;
    font-weight: 800;
}

.product-result-details {
    margin-top: 8px;
    color: var(--muted);
    line-height: 1.65;
}

.tools-showcase {
    padding-block: 76px;
}

.tool-cards {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tool-link {
    display: flex;
    min-height: 220px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--surface);
    flex-direction: column;
    text-decoration: none;
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        background 180ms ease;
}

.tool-link:hover {
    transform: translateY(-5px);
    border-color: rgba(85, 216, 193, 0.5);
    background: var(--surface-strong);
}

.tool-link-icon {
    display: grid;
    width: 46px;
    height: 46px;
    margin-bottom: 32px;
    place-items: center;
    border-radius: 14px;
    color: var(--brand);
    background: rgba(85, 216, 193, 0.09);
    font-weight: 900;
}

.tool-link h3 {
    margin: 0 0 10px;
}

.tool-link p {
    margin: 0;
    color: var(--muted);
    line-height: 1.65;
}

.tools-showcase .tool-link:nth-child(n + 13) {
    display: none;
}

.catalogue-cta {
    display: flex;
    margin-top: 1.5rem;
    justify-content: center;
}

@media (max-width: 900px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .tool-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .product-page {
        padding-block: 38px 56px;
    }

    .product-calculator {
        padding: 20px;
        border-radius: 22px;
    }

    .product-control input,
    .product-control select,
    .product-control textarea {
        font-size: 1rem;
    }

    .product-download {
        width: 100%;
        justify-content: center;
    }
}

.catalogue-page {
    min-height: 75vh;
    padding-block: clamp(3rem, 7vw, 6rem);
}

.catalogue-header {
    max-width: 780px;
}

.catalogue-header h1 {
    margin: 1rem 0;
    font-size: clamp(2.4rem, 7vw, 5rem);
    line-height: 1;
}

.catalogue-header > p:last-child,
.catalogue-card p,
.catalogue-empty {
    color: var(--muted);
}

.catalogue-controls {
    margin-block: 2.5rem 2rem;
}

.catalogue-controls input {
    width: min(100%, 720px);
    padding: 1rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
}

.product-control textarea {
    min-height: 180px;
    padding-block: 16px;
    resize: vertical;
}

.catalogue-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-block: 1rem;
}

.catalogue-filter {
    padding: 0.65rem 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
}

.catalogue-filter:hover,
.catalogue-filter.is-active {
    border-color: var(--brand);
    background: rgba(85, 216, 193, 0.12);
    color: var(--brand);
}

.catalogue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
    gap: 1rem;
}

.catalogue-card {
    display: flex;
    min-height: 260px;
    padding: 1.35rem;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--surface);
    color: var(--text);
    flex-direction: column;
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease;
}

.catalogue-card:hover {
    border-color: var(--brand);
    transform: translateY(-3px);
}

.catalogue-card-icon {
    display: grid;
    width: 3rem;
    height: 3rem;
    place-items: center;
    border-radius: 14px;
    background: rgba(85, 216, 193, 0.12);
    color: var(--brand);
    font-weight: 800;
}

.catalogue-card-category {
    margin-top: 1rem;
    color: var(--brand);
    font-size: 0.8rem;
}

.catalogue-card h2 {
    margin: 0.5rem 0;
    font-size: 1.25rem;
}

.catalogue-card p {
    margin: 0 0 1.25rem;
}

.catalogue-card strong {
    margin-top: auto;
}

.catalogue-empty {
    padding: 2rem;
    text-align: center;
}