/* AI Generation Calculator */

.tool-hero {
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.12), transparent 32%),
        linear-gradient(180deg, var(--bg-secondary) 0%, var(--white) 100%);
    border-bottom: 1px solid var(--border);
    padding: var(--space-16) 0 var(--space-12);
}

.tool-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-4);
}

.tool-hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-3);
}

.tool-hero p:last-child {
    max-width: 720px;
    font-size: 1.125rem;
    line-height: 1.7;
}

.calculator-section {
    padding: var(--space-8) 0 var(--space-12);
}

.calculator-layout {
    display: grid;
    gap: var(--space-6);
}

.calculator-main,
.calculator-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.card-section,
.summary-card,
.summary-help {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
}

.card-section {
    padding: var(--space-6);
}

.section-heading,
.summary-card__header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-3);
    align-items: flex-start;
}

.section-heading__eyebrow,
.summary-card__eyebrow {
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.section-heading h2,
.summary-card h2,
.summary-help h2 {
    font-size: 1.375rem;
    margin: 0;
}

.card-section__intro {
    margin: var(--space-4) 0 var(--space-6);
    max-width: 860px;
    line-height: 1.7;
}

.settings-grid {
    display: grid;
    gap: var(--space-4);
}

.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.field__label {
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 600;
}

.field__hint {
    color: var(--text-secondary);
    font-size: 0.75rem;
    line-height: 1.5;
}

.rows-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.calc-row {
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: var(--space-5);
    background:
        linear-gradient(180deg, rgba(37, 99, 235, 0.02), transparent 140px),
        var(--white);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.calc-row:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-base);
}

.calc-row--invalid {
    border-color: rgba(220, 38, 38, 0.25);
    background:
        linear-gradient(180deg, rgba(220, 38, 38, 0.04), transparent 140px),
        var(--white);
}

.calc-row__header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-3);
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.calc-row__eyebrow {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
}

.calc-row__title {
    color: var(--text);
    font-size: 1.125rem;
    font-weight: 600;
}

.calc-row__actions {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.calc-row__status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.calc-row__status--valid {
    background: rgba(5, 150, 105, 0.1);
    color: var(--success);
}

.calc-row__status--invalid {
    background: rgba(220, 38, 38, 0.1);
    color: var(--error);
}

.calc-row__remove {
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--white);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.45rem 0.8rem;
    font: inherit;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.calc-row__remove:hover:not(:disabled) {
    border-color: rgba(220, 38, 38, 0.25);
    color: var(--error);
    background: rgba(220, 38, 38, 0.03);
}

.calc-row__remove:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.calc-row__grid {
    display: grid;
    gap: var(--space-4);
}

.calc-row__note {
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border-radius: 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.calc-row__note p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
}

.calc-row__note strong {
    color: var(--text);
}

.calc-row__result {
    margin-top: var(--space-4);
}

.row-result {
    border-radius: 0.875rem;
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.row-result--invalid {
    border-color: rgba(220, 38, 38, 0.2);
    background: rgba(220, 38, 38, 0.04);
}

.row-result__error {
    color: var(--error);
    font-size: 0.875rem;
    font-weight: 500;
}

.row-result__grid {
    display: grid;
    gap: var(--space-3);
}

.row-result__metric {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.row-result__metric span {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.row-result__metric strong {
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
}

.row-result__warning {
    margin-top: var(--space-3);
    color: var(--warning);
    font-size: 0.75rem;
    line-height: 1.5;
}

.summary-card {
    padding: var(--space-6);
}

.summary-card__total {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text);
    margin: var(--space-4) 0 var(--space-5);
}

.summary-card__metrics {
    display: grid;
    gap: var(--space-3);
}

.summary-metric {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
    align-items: baseline;
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border);
}

.summary-metric:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.summary-metric span {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.summary-metric strong {
    color: var(--text);
    font-size: 0.9375rem;
    font-weight: 600;
    text-align: right;
}

.summary-card__rows {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.summary-row {
    border: 1px solid var(--border);
    border-radius: 0.875rem;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
}

.summary-row__top {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: 0.35rem;
}

.summary-row__label {
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 600;
}

.summary-row__value {
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 600;
}

.summary-row__meta {
    color: var(--text-secondary);
    font-size: 0.75rem;
    line-height: 1.5;
}

.summary-row--invalid {
    border-color: rgba(220, 38, 38, 0.2);
}

.summary-help {
    padding: var(--space-5);
}

.summary-help ul {
    margin: var(--space-4) 0 0;
    padding-left: var(--space-5);
}

.summary-help li {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-2);
}

.snapshot-note {
    border: 1px solid rgba(37, 99, 235, 0.16);
    border-radius: 1rem;
    background: rgba(37, 99, 235, 0.04);
    padding: var(--space-5);
}

.snapshot-note__title {
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.snapshot-note p {
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.snapshot-note__links {
    margin: 0;
    padding-left: var(--space-5);
}

.snapshot-note__links li {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.snapshot-note__links a {
    color: var(--primary);
}

.faq {
    margin-top: var(--space-4);
}

.faq details {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-base);
    margin-bottom: var(--space-3);
}

.faq summary {
    padding: var(--space-4);
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    list-style: none;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary::before {
    content: "+";
    display: inline-block;
    width: 20px;
    font-weight: 400;
    color: var(--text-secondary);
}

.faq details[open] summary::before {
    content: "-";
}

.faq details p {
    padding: 0 var(--space-4) var(--space-4);
    padding-left: calc(var(--space-4) + 20px);
    margin: 0;
    font-size: 0.875rem;
}

.seo-content h3 {
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.seo-content ul {
    margin-bottom: var(--space-4);
}

@media (min-width: 860px) {
    .calculator-layout {
        grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.8fr);
        align-items: start;
    }

    .summary-card {
        position: sticky;
        top: calc(84px + var(--space-4));
    }

    .settings-grid,
    .calc-row__grid,
    .row-result__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1180px) {
    .settings-grid,
    .calc-row__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .row-result__grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 859px) {
    .summary-card {
        order: -1;
    }
}

@media (max-width: 640px) {
    .tool-hero {
        padding: var(--space-12) 0 var(--space-10);
    }

    .tool-hero h1 {
        font-size: 1.85rem;
    }

    .tool-hero p:last-child {
        font-size: 1rem;
    }

    .card-section,
    .summary-card,
    .summary-help {
        padding: var(--space-4);
        border-radius: 0.875rem;
    }

    .summary-card__total {
        font-size: 1.875rem;
    }

    .section-heading,
    .calc-row__header,
    .summary-row__top {
        flex-direction: column;
        align-items: flex-start;
    }

    .calc-row {
        padding: var(--space-4);
    }

    .calc-row__actions {
        width: 100%;
        justify-content: space-between;
    }

    .summary-metric {
        flex-direction: column;
        align-items: flex-start;
    }

    .summary-metric strong {
        text-align: left;
    }

    .section-heading .btn,
    .calc-row__remove {
        width: 100%;
        justify-content: center;
    }
}