/* AI motor page: page-intro, principles, flow-diagram, steps, domain-card and feature-list sections */
/* Mobile-first, except the diagram, which switches between its stacked and its four-column layout at 768px. */

:root {
    /* Darker orange for small text, so it meets WCAG AA on light backgrounds. The brand orange stays for fills and borders. */
    --aim-orange-text: #b8410f;
    --aim-orange-tint: #fdf1ec;
    --aim-line: #4a4d50;
    --aim-rule: #c4c4c4;
    --aim-divider: #dcdcdc;
    --aim-radius: var(--radius-card-mobile);
}

@media (min-width: 768px) {
    :root {
        --aim-radius: var(--radius-card);
    }
}

.aim-section-head {
    margin-bottom: var(--spacing-xl);
}

.aim-section-title {
    max-width: 960px;
    margin: 0 0 var(--spacing-lg);
    font-size: 40px;
    line-height: 44px;
    color: var(--color-text);
}

.aim-section-head .aim-section-title:last-child {
    margin-bottom: 0;
}

.aim-section-intro {
    max-width: 720px;
    font-size: var(--font-size-body-mobile);
    line-height: var(--line-height-body-mobile);
    color: var(--color-secondary);
}

@media (min-width: 768px) {
    .aim-section-head {
        margin-bottom: var(--spacing-2xl);
    }

    .aim-section-title {
        font-size: var(--font-size-h2-tablet);
        line-height: var(--line-height-h2-tablet);
    }

    .aim-section-intro {
        font-size: var(--font-size-body);
        line-height: var(--line-height-body);
    }
}

@media (min-width: 1200px) {
    .aim-section-title {
        font-size: var(--font-size-h2);
        line-height: var(--line-height-h2);
    }
}

/* Page intro. Its top padding, on top of main's, keeps the label clear of the fixed header. */
.aim-intro {
    padding: 100px 0 50px;
}

.aim-intro-title {
    max-width: 1000px;
    margin: 0 0 32px;
    font-size: var(--font-size-h1-mobile);
    line-height: var(--line-height-h1-mobile);
    color: var(--color-text);
}

.aim-intro-text {
    max-width: 720px;
    font-size: 18px;
    line-height: 27px;
    color: var(--color-secondary);
}

.aim-intro-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 32px;
    margin-top: var(--spacing-xl);
}

.aim-intro-link {
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-text);
    text-decoration: underline;
    text-underline-offset: 4px;
}

@media (min-width: 768px) {
    .aim-intro {
        padding: 100px 0;
    }

    .aim-intro-title {
        font-size: var(--font-size-h1-tablet);
        line-height: var(--line-height-h1-tablet);
    }

    .aim-intro-link {
        font-size: var(--font-size-body);
        line-height: var(--line-height-body);
    }
}

@media (min-width: 1200px) {
    .aim-intro {
        padding: 80px 0 100px;
    }

    .aim-intro-title {
        font-size: var(--font-size-h1);
        line-height: var(--line-height-h1);
    }

    .aim-intro-text {
        font-size: 22px;
        line-height: 33px;
    }
}

/* Principles */
.aim-principles {
    padding-top: 0;
}

.aim-principles-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.aim-principle {
    flex: 1 1 300px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: var(--spacing-lg);
    background: var(--color-text-light);
    border-radius: var(--aim-radius);
}

.aim-principle-icon {
    flex-shrink: 0;
    color: var(--color-primary);
}

.aim-principle-title {
    font-size: var(--font-size-h4-mobile);
    line-height: var(--line-height-h4-mobile);
    color: var(--color-text);
}

.aim-principle-text {
    font-size: var(--font-size-body-mobile);
    line-height: var(--line-height-body-mobile);
    color: var(--color-secondary);
}

@media (min-width: 768px) {
    .aim-principle {
        padding: var(--spacing-xl);
    }

    .aim-principle-title {
        font-size: var(--font-size-h4);
        line-height: var(--line-height-h4);
    }

    .aim-principle-text {
        font-size: var(--font-size-body);
        line-height: var(--line-height-body);
    }
}

/* Flow diagram: shared look */
.aim-flow-section .aim-section-intro {
    margin-bottom: 48px;
}

.aim-flow-heading {
    margin: 0;
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-secondary);
    text-align: center;
}

.aim-flow-col-engine .aim-flow-heading {
    color: var(--aim-orange-text);
}

.aim-flow-cards {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.aim-flow-cards > li {
    display: flex;
    min-width: 0;
}

.aim-flow-card {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 16px 12px;
    background: var(--color-text-light);
    border-radius: 16px;
    text-align: center;
    font-size: 13px;
    line-height: 18px;
    color: var(--color-secondary);
}

.aim-flow-card-body {
    overflow-wrap: anywhere;
}

.aim-flow-card-title {
    display: block;
    font-family: var(--font-family-heading);
    font-variation-settings: var(--font-variation-settings);
    font-weight: var(--font-weight-normal);
    font-size: 16px;
    line-height: 22px;
    color: var(--color-text);
}

.aim-flow-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
}

.aim-flow-card-output {
    border: 2px solid var(--color-primary);
}

.aim-flow-card-engine {
    gap: 12px;
    font-size: 15px;
    line-height: 22px;
}

.aim-flow-card-engine .aim-flow-icon {
    width: 56px;
    height: 56px;
}

.aim-flow-card-engine .aim-flow-card-title {
    font-size: 28px;
    line-height: 36px;
}

.aim-flow-arrow {
    position: relative;
}

.aim-flow-arrow::before,
.aim-flow-arrow::after {
    content: "";
    position: absolute;
}

.aim-flow-arrow::before {
    background: var(--aim-line);
}

.aim-flow-footnote {
    max-width: 960px;
    margin-top: 32px;
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    font-style: italic;
    color: var(--color-secondary);
}

/* Flow diagram: phones, a vertical stack with the pairs side by side */
@media (max-width: 767px) {
    .aim-flow {
        display: flex;
        flex-direction: column;
        gap: 10px;
        max-width: 480px;
    }

    .aim-flow-col {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .aim-flow-col-inputs .aim-flow-cards,
    .aim-flow-col-destinations .aim-flow-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    /* The engine's column is the box itself, so its "Iterator IT" heading sits inside it */
    .aim-flow-col-engine {
        align-items: center;
        gap: 12px;
        padding: 24px 20px;
        background: var(--aim-orange-tint);
        border: 3px solid var(--color-primary);
        border-radius: var(--radius-card);
    }

    .aim-flow-col-engine .aim-flow-heading {
        font-size: 14px;
        line-height: 20px;
    }

    .aim-flow-card-engine {
        padding: 0;
        background: none;
    }

    .aim-flow-card-output {
        flex-direction: row;
        justify-content: flex-start;
        gap: 14px;
        padding: 16px;
        text-align: left;
    }

    .aim-flow-card-output .aim-flow-icon {
        width: 36px;
        height: 36px;
    }

    .aim-flow-link {
        display: flex;
        justify-content: center;
        height: 36px;
    }

    .aim-flow-arrow {
        width: 14px;
    }

    .aim-flow-arrow + .aim-flow-arrow {
        display: none;
    }

    .aim-flow-arrow::before {
        left: 50%;
        top: 2px;
        bottom: 8px;
        width: 2px;
        margin-left: -1px;
    }

    .aim-flow-arrow::after {
        left: 0;
        bottom: 3px;
        border-left: 7px solid transparent;
        border-right: 7px solid transparent;
        border-top: 9px solid var(--aim-line);
    }
}

/* Flow diagram: wider screens, four columns with arrows between them */
@media (min-width: 768px) {
    .aim-flow {
        /* The gap between stacked cards; the split arrow's bar is measured from it */
        --aim-flow-gap: 48px;
        display: grid;
        grid-template-columns:
            240fr minmax(24px, 66fr)
            280fr minmax(24px, 66fr)
            240fr minmax(32px, 68fr)
            240fr;
        grid-template-rows: auto auto;
        row-gap: 20px;
    }

    /* Each column spans both rows and shares them, so headings line up even when one wraps */
    .aim-flow-col {
        display: grid;
        grid-row: 1 / span 2;
        grid-template-rows: subgrid;
        min-width: 0;
    }

    .aim-flow-col-inputs { grid-column: 1; }
    .aim-flow-link-in { grid-column: 2; }
    .aim-flow-col-engine { grid-column: 3; }
    .aim-flow-link-out { grid-column: 4; }
    .aim-flow-col-output { grid-column: 5; }
    .aim-flow-link-split { grid-column: 6; }
    .aim-flow-col-destinations { grid-column: 7; }

    .aim-flow-heading {
        align-self: end;
    }

    .aim-flow-cards {
        grid-auto-rows: 1fr;
        gap: var(--aim-flow-gap);
    }

    .aim-flow-col-output .aim-flow-cards {
        align-self: center;
    }

    .aim-flow-card {
        min-height: 144px;
    }

    .aim-flow-card-output {
        min-height: 160px;
    }

    .aim-flow-card-engine {
        background: var(--aim-orange-tint);
        border: 3px solid var(--color-primary);
        border-radius: var(--radius-card);
        padding: 24px 16px;
        gap: 16px;
    }

    .aim-flow-link {
        grid-row: 2;
        position: relative;
        display: flex;
        flex-direction: column;
        gap: var(--aim-flow-gap);
    }

    .aim-flow-arrow {
        flex: 1;
    }

    .aim-flow-arrow::before {
        left: 0;
        right: 10px;
        top: 50%;
        height: 2px;
        margin-top: -1px;
    }

    .aim-flow-arrow::after {
        right: 2px;
        top: 50%;
        margin-top: -5px;
        border-top: 5px solid transparent;
        border-bottom: 5px solid transparent;
        border-left: 9px solid var(--aim-line);
    }

    /* One-to-two split: a stem from the output, a bar between the two branch centres, an arrow to each */
    .aim-flow-link-split .aim-flow-arrow::before {
        left: 50%;
    }

    .aim-flow-link-split::before,
    .aim-flow-link-split::after {
        content: "";
        position: absolute;
        background: var(--aim-line);
    }

    .aim-flow-link-split::before {
        left: 0;
        width: 50%;
        top: 50%;
        height: 2px;
        margin-top: -1px;
    }

    .aim-flow-link-split::after {
        left: 50%;
        width: 2px;
        margin-left: -1px;
        top: calc((100% - var(--aim-flow-gap)) / 4 - 1px);
        bottom: calc((100% - var(--aim-flow-gap)) / 4 - 1px);
    }
}

@media (min-width: 1200px) {
    .aim-flow-card {
        padding: 16px 20px;
        font-size: 14px;
    }

    .aim-flow-card-title {
        font-size: 18px;
        line-height: 24px;
    }

    .aim-flow-icon {
        width: 40px;
        height: 40px;
    }

    .aim-flow-card-engine {
        padding: 24px;
        line-height: 24px;
    }

    .aim-flow-card-engine .aim-flow-icon {
        width: 72px;
        height: 72px;
    }

    .aim-flow-card-engine .aim-flow-card-title {
        font-size: 32px;
        line-height: 40px;
    }
}

/* Steps */
.aim-steps-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--spacing-md);
}

.aim-step {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 22px 18px;
    background: var(--color-text-light);
    border: 2px solid transparent;
    border-radius: var(--aim-radius);
}

.aim-step-highlighted {
    border-color: var(--color-primary);
}

.aim-step-number {
    font-family: var(--font-family-heading);
    font-variation-settings: var(--font-variation-settings);
    font-size: var(--font-size-h3-mobile);
    line-height: var(--line-height-h3-mobile);
    color: var(--aim-orange-text);
}

.aim-step-title {
    font-size: 24px;
    line-height: 32px;
    color: var(--color-text);
}

.aim-step-text {
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-secondary);
}

@media (min-width: 768px) {
    .aim-steps-list {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .aim-step {
        padding: 30px 26px;
    }

    .aim-step-number {
        font-size: var(--font-size-h3);
        line-height: var(--line-height-h3);
    }
}

@media (min-width: 1200px) {
    .aim-steps-list {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .aim-step {
        min-height: 340px;
    }
}

/* Domain card */
.aim-domain-grid {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xl) var(--spacing-3xl);
}

.aim-domain-text,
.aim-domain-card {
    flex: 1 1 420px;
    min-width: 0;
}

.aim-domain-title {
    margin: 0 0 var(--spacing-lg);
    font-size: var(--font-size-h3-mobile);
    line-height: var(--line-height-h3-mobile);
    color: var(--color-text);
}

.aim-domain-text p {
    font-size: var(--font-size-body-mobile);
    line-height: var(--line-height-body-mobile);
    color: var(--color-secondary);
}

.aim-domain-text p + p {
    margin-top: var(--spacing-lg);
}

.aim-domain-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-text-light);
    border-radius: var(--aim-radius);
}

.aim-domain-card-title {
    font-size: var(--font-size-h4-mobile);
    line-height: var(--line-height-h4-mobile);
    color: var(--color-text);
}

.aim-domain-card-text {
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-secondary);
}

.aim-chips {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.aim-chip {
    display: inline-flex;
    align-items: center;
    min-height: var(--button-height);
    padding: 10px 24px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    font-family: var(--font-family-heading);
    font-variation-settings: var(--font-variation-settings);
    font-size: var(--font-size-h6);
    line-height: var(--line-height-h6);
    color: var(--aim-orange-text);
}

.aim-chip-more {
    border: 2px dashed #8a8e92;
    color: var(--aim-line);
}

.aim-domain-note {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--aim-divider);
}

@media (min-width: 768px) {
    .aim-domain-title {
        font-size: var(--font-size-h3);
        line-height: var(--line-height-h3);
    }

    .aim-domain-text p {
        font-size: var(--font-size-body);
        line-height: var(--line-height-body);
    }

    .aim-domain-card {
        padding: var(--spacing-xl);
    }

    .aim-domain-card-title {
        font-size: var(--font-size-h4);
        line-height: var(--line-height-h4);
    }
}

/* Feature list */
.aim-features-list {
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xl) var(--spacing-lg);
}

.aim-feature {
    flex: 1 1 260px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--aim-rule);
}

.aim-feature-term {
    font-family: var(--font-family-heading);
    font-variation-settings: var(--font-variation-settings);
    font-size: var(--font-size-h5-mobile);
    line-height: var(--line-height-h5-mobile);
    color: var(--color-text);
}

.aim-feature-text {
    margin: 0;
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-secondary);
}

.aim-features-closing {
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-small);
    line-height: var(--line-height-small);
    color: var(--color-secondary);
}

@media (min-width: 768px) {
    .aim-feature-term {
        font-size: var(--font-size-h5);
        line-height: var(--line-height-h5);
    }

    .aim-features-closing {
        margin-top: var(--spacing-2xl);
    }
}