/* ═══════════════════════════════════════════════════════
   RHIBUSTECH — SERVICE PAGE CONTENT SECTIONS
   Section frame, FAQ, reusable diagram blocks, and the Digital
   Strategy diagrams. Loaded by every services/*.html page after
   style.css and services.css.
   All colours come from the brand palette and theme variables.
   Diagrams animate only when scrolled into view (the .reveal
   helper adds .is-visible) and are static under reduced motion.
═══════════════════════════════════════════════════════ */


/* ── SHARED SECTION FRAME ───────────────────────────── */

.ds {
    padding: 80px var(--gutter);
    scroll-margin-top: var(--header-h);
}

.ds--alt {
    background: var(--bg-alt);
    border-bottom: 1px solid var(--line-soft);
    border-top: 1px solid var(--line-soft);
}

/* section heads: title on the left, intro on the right, so wide screens are used and nothing floats alone */
.ds-head {
    align-items: end;
    display: grid;
    gap: 14px 56px;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    margin-bottom: 40px;
}

.ds-head .section-tag {
    grid-column: 1 / -1;
    margin-bottom: 6px;
}

.ds-head .section-title {
    grid-column: 1;
}

.ds-head .section-lede {
    grid-column: 2;
    margin: 0;
    max-width: 640px;
}

.ds-grid {
    align-items: start;
    display: grid;
    gap: 56px;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.ds-grid--visual-left {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
}

.ds-text {
    color: var(--fg-soft);
    font-size: 15px;
    line-height: 1.8;
    margin: 0 0 18px;
    max-width: 560px;
    text-align: left;
}

.ds-sub {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: .14em;
    margin: 28px 0 12px;
    text-transform: uppercase;
}

.ds-checks {
    list-style: none;
    margin: 0 0 28px;
    padding: 0;
}

.ds-checks li {
    border-top: 1px solid var(--line);
    color: var(--fg-soft);
    font-size: 15px;
    line-height: 1.6;
    padding: 10px 0 10px 28px;
    position: relative;
    text-align: left;
}

.ds-checks li:last-child {
    border-bottom: 1px solid var(--line);
}

.ds-checks li::before {
    color: var(--accent-ink);
    content: "\2B21";
    font-size: 12px;
    left: 0;
    position: absolute;
    top: 12px;
}

.ds-checks--two {
    column-gap: 56px;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.ds-checks--two li:nth-last-child(2) {
    border-bottom: 1px solid var(--line);
}

.ds-note {
    color: var(--fg-muted);
    font-size: 13px;
    line-height: 1.7;
    margin: 8px 0 0;
    max-width: 760px;
    text-align: left;
}

.ds-note a,
.rm-fig figcaption a {
    border-bottom: 1px solid var(--line-strong);
    color: var(--fg);
    transition: border-color .2s, color .2s;
}

.ds-note a:hover,
.rm-fig figcaption a:hover {
    border-color: var(--accent-ink);
    color: var(--accent-ink);
}

.ds-steps {
    counter-reset: ds;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ds-steps li {
    border-top: 1px solid var(--line);
    counter-increment: ds;
    display: grid;
    gap: 2px 18px;
    grid-template-columns: 32px minmax(0, 1fr);
    padding: 16px 0;
    text-align: left;
}

.ds-steps li:last-child {
    border-bottom: 1px solid var(--line);
}

.ds-steps li::before {
    color: var(--accent-ink);
    content: counter(ds, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 12px;
    grid-row: 1 / span 2;
    padding-top: 3px;
}

.ds-steps strong {
    font-size: 16px;
    font-weight: 800;
}

.ds-steps span {
    color: var(--fg-muted);
    font-size: 14px;
    line-height: 1.6;
}

/* section headlines are kept modest so the page stays compact */
.ds-head .section-title {
    font-size: clamp(30px, 3.6vw, 52px);
}

/* titles beside a diagram sit in a half-width column, so they run smaller than full-width ones */
.ds-copy .section-title {
    font-size: clamp(30px, 3.3vw, 50px);
    margin-bottom: 28px;
}

.ds figure {
    margin: 0;
}

.ds figcaption {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    line-height: 1.7;
    margin-top: 18px;
}


/* ── HYPE VS VALUE TABLE ────────────────────────────── */

.vs-wrap {
    overflow-x: auto;
}

.vs {
    border-collapse: collapse;
    width: 100%;
}

.vs th,
.vs td {
    padding: 16px 32px 16px 0;
    text-align: left;
    vertical-align: top;
    width: 50%;
}

.vs thead th {
    padding-bottom: 18px;
}

.vs tbody td {
    border-top: 1px solid var(--line);
    font-size: clamp(17px, 1.8vw, 24px);
    letter-spacing: -.01em;
    line-height: 1.35;
}

.vs tbody td:first-child {
    color: var(--fg-muted);
    font-weight: 500;
}

.vs tbody td:last-child {
    color: var(--fg);
    font-weight: 800;
    padding-left: 30px;
    position: relative;
}

.vs tbody td:last-child::before {
    color: var(--accent-ink);
    content: "\2B21";
    font-size: 13px;
    left: 0;
    position: absolute;
    top: 22px;
}

.vs-col {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.vs-col--hype {
    color: var(--fg-muted);
}

.vs-col--value {
    color: var(--accent-ink);
    padding-left: 30px;
}

.vs tbody tr {
    transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.vs tbody tr:nth-child(2) { transition-delay: .08s; }
.vs tbody tr:nth-child(3) { transition-delay: .16s; }
.vs tbody tr:nth-child(4) { transition-delay: .24s; }
.vs tbody tr:nth-child(5) { transition-delay: .32s; }
.vs tbody tr:nth-child(6) { transition-delay: .4s; }

.js .reveal:not(.is-visible) .vs tbody tr {
    opacity: 0;
    transform: translateY(14px);
}


/* ── AI USE CASE REGISTER CARD ──────────────────────── */

.reg-card {
    background: var(--bg);
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    box-shadow: 0 40px 80px -44px rgba(251, 147, 0, .3);
    overflow: hidden;
}

body.light-mode .reg-card {
    box-shadow: 0 40px 80px -44px rgba(26, 18, 16, .35);
}

.reg-head {
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    padding: 16px 24px;
}

.reg-title {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.reg-id {
    border: 1px solid var(--accent-ink);
    border-radius: 3px;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 3px 10px;
}

.reg-body {
    padding: 28px 24px 12px;
}

.reg-name {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -.02em;
    margin: 0 0 20px;
}

.reg-fields {
    margin: 0;
}

.reg-field {
    border-top: 1px solid var(--line-soft);
    display: grid;
    gap: 4px 20px;
    grid-template-columns: 150px minmax(0, 1fr);
    padding: 12px 0;
}

.reg-field dt {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    padding-top: 3px;
    text-transform: uppercase;
}

.reg-field dd {
    color: var(--fg);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    margin: 0;
}

.reg-scores {
    border-top: 1px solid var(--line-soft);
    padding: 14px 0;
}

.reg-score {
    align-items: center;
    display: grid;
    gap: 14px;
    grid-template-columns: 110px minmax(0, 1fr) 28px;
    padding: 6px 0;
}

.reg-score span {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.reg-score b {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 13px;
    text-align: right;
}

.reg-bar {
    background: var(--line);
    border-radius: 4px;
    height: 6px;
    overflow: hidden;
}

.reg-bar i {
    background: var(--orange);
    display: block;
    height: 100%;
    transition: width 1.2s var(--ease);
    transition-delay: calc(var(--i, 0) * 90ms + 200ms);
    width: var(--w);
}

.reg-block {
    border-top: 1px solid var(--line-soft);
    padding: 14px 0;
}

.reg-label {
    color: var(--fg-muted);
    display: block;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.reg-tiers,
.reg-status {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
    margin: 10px 0 0;
    padding: 0;
}

.reg-tiers li,
.reg-status li {
    border: 1px solid var(--line-strong);
    border-radius: 50px;
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .06em;
    padding: 5px 12px;
    text-transform: uppercase;
}

.reg-status li.is-done {
    border-color: var(--fg-muted);
    color: var(--fg);
}

.reg-tiers li.is-on,
.reg-status li.is-on {
    background: var(--orange);
    border-color: var(--orange);
    color: var(--black);
    font-weight: 700;
}

.reg-card figcaption {
    border-top: 1px solid var(--line);
    margin: 0;
    padding: 12px 24px;
}

.reg-field,
.reg-score,
.reg-block {
    transition: opacity .6s var(--ease), transform .6s var(--ease);
    transition-delay: calc(var(--i, 0) * 90ms);
}

.js .reveal:not(.is-visible) .reg-field,
.js .reveal:not(.is-visible) .reg-score,
.js .reveal:not(.is-visible) .reg-block {
    opacity: 0;
    transform: translateY(10px);
}

.js .reveal:not(.is-visible) .reg-bar i {
    width: 0;
}


/* ── PRIORITISATION MATRIX ──────────────────────────── */

.mx {
    display: block;
    height: auto;
    max-width: 640px;
    width: 100%;
}

.mx-hot {
    fill: rgba(251, 147, 0, .09);
}

.mx-axis {
    stroke: var(--fg-muted);
    stroke-width: 1.5;
}

.mx-mid {
    stroke: var(--line-strong);
    stroke-dasharray: 3 5;
}

.mx-quad,
.mx-axis-label {
    fill: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .14em;
}

.mx-quad--hot {
    fill: var(--accent-ink);
    font-weight: 700;
}

.mx-bub circle {
    fill: var(--orange);
    fill-opacity: .95;
}

.mx-bub text {
    fill: var(--black);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
}

.mx-bub--risk circle {
    fill: var(--bg-alt);
    stroke: var(--accent-ink);
    stroke-dasharray: 4 4;
    stroke-width: 2;
}

.mx-bub--risk text {
    fill: var(--fg);
}

.mx-bub {
    transform-box: fill-box;
    transform-origin: center;
    transition: opacity .6s var(--ease), transform .6s var(--ease);
    transition-delay: calc(var(--i, 0) * 120ms + 200ms);
}

.js .reveal:not(.is-visible) .mx-bub {
    opacity: 0;
    transform: scale(.3);
}

.mx-fig figcaption {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
}

.mx-key {
    align-items: center;
    display: inline-flex;
    gap: 8px;
}

.mx-key-dot {
    background: var(--orange);
    border-radius: 50%;
    display: inline-block;
    height: 12px;
    width: 12px;
}

.mx-key-dot--risk {
    background: transparent;
    border: 2px dashed var(--accent-ink);
}


/* ── EU AI ACT PYRAMID ──────────────────────────────── */

.pyr {
    display: block;
    height: auto;
    margin-inline: auto;
    max-width: 560px;
    width: 100%;
}

.pyr-tier {
    stroke: var(--bg-alt);
    stroke-linejoin: round;
    stroke-width: 5;
    transform-box: fill-box;
    transform-origin: center bottom;
    transition: opacity .7s var(--ease), transform .7s var(--ease);
    transition-delay: calc(var(--i, 0) * 130ms);
}

.pyr-t1 {
    fill: var(--dark-accent);
    stroke: var(--orange);
    stroke-width: 2;
}

.pyr-t2 {
    fill: var(--orange);
}

.pyr-t3 {
    fill: var(--mid-silver);
}

.pyr-t4 {
    fill: var(--charcoal);
}

.pyr-label {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .12em;
    transition: opacity .6s var(--ease) .7s;
}

.pyr-label--t1 { fill: var(--orange); font-size: 10px; }
.pyr-label--t2 { fill: var(--black); }
.pyr-label--t3 { fill: var(--black); }
.pyr-label--t4 { fill: var(--bright-silver); }

.js .reveal:not(.is-visible) .pyr-tier {
    opacity: 0;
    transform: translateY(26px);
}

.js .reveal:not(.is-visible) .pyr-label {
    opacity: 0;
}

.tiers {
    list-style: none;
    margin: 0;
    padding: 0;
}

.tiers li {
    border-top: 1px solid var(--line);
    color: var(--fg-soft);
    font-size: 14px;
    line-height: 1.7;
    padding: 14px 0 14px 36px;
    position: relative;
    text-align: left;
}

.tiers li:last-child {
    border-bottom: 1px solid var(--line);
}

.tiers li::before {
    border: 2px solid transparent;
    border-radius: 3px;
    content: "";
    height: 16px;
    left: 0;
    position: absolute;
    top: 18px;
    width: 16px;
}

.tiers-t1::before { background: var(--dark-accent); border-color: var(--orange) !important; }
.tiers-t2::before { background: var(--orange); }
.tiers-t3::before { background: var(--mid-silver); }
.tiers-t4::before { background: var(--charcoal); }

.tiers strong {
    color: var(--fg);
    display: block;
    font-size: 16px;
    font-weight: 800;
    margin-bottom: 4px;
}

.act-facts {
    margin-top: 44px;
}


/* ── AI GOVERNANCE LOOP ─────────────────────────────── */

/* governance: diagram on the left, the three explanations stacked beside it */
.gov-layout {
    align-items: center;
    display: grid;
    gap: 56px;
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
}

.gov-fig {
    margin: 0;
}

.gov {
    display: block;
    height: auto;
    width: 100%;
}

.gov-ring {
    fill: none;
    stroke: var(--line-strong);
    stroke-width: 1.5;
}

.gov-ring--inner {
    stroke: var(--line);
    stroke-dasharray: 3 8;
}

.gov-node circle {
    fill: var(--bg);
    stroke: var(--orange);
    stroke-width: 2;
}

.gov-n {
    fill: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
}

.gov-t {
    fill: var(--fg);
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 800;
}

.gov-s {
    fill: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .03em;
}

.gov-core {
    fill: var(--fg);
    font-family: var(--font-sans);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -.02em;
}

.gov-core--accent {
    fill: var(--accent-ink);
}

.gov-fw {
    fill: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .14em;
}

.gov-fw--names {
    fill: var(--fg-soft);
    font-size: 11px;
    letter-spacing: .04em;
}

.gov-dot {
    fill: var(--orange);
    filter: drop-shadow(0 0 8px rgba(251, 147, 0, .85));
}

/* the dot completes one lap in 12s, reaching each node every 2s as that node lights up */
.gov-orbit {
    animation: govSpin 12s linear infinite;
    transform-origin: 380px 260px;
}

.gov-node circle {
    animation: govLit 12s ease-in-out infinite;
    animation-delay: calc(var(--i, 0) * 2s - .3s);
}

@keyframes govSpin {
    to { transform: rotate(360deg); }
}

@keyframes govLit {
    0%, 22%, 100% { fill: var(--bg); }
    6%, 14% { fill: rgba(251, 147, 0, .32); }
}

.gov-list {
    display: none;
}

.gov-cols {
    display: grid;
    gap: 0;
    grid-template-columns: 1fr;
}

.gov-col {
    border-top: 1px solid var(--line);
    padding: 22px 0;
}

.gov-col:last-child {
    border-bottom: 1px solid var(--line);
}

.gov-col-title {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -.02em;
    margin: 0 0 12px;
}

.gov-col p {
    color: var(--fg-soft);
    font-size: 15px;
    line-height: 1.75;
    margin: 0;
    text-align: left;
}


/* ── AI ROADMAP (now / next / later) ────────────────── */

.rm {
    border-collapse: separate;
    border-spacing: 0 10px;
    width: 100%;
}

.rm thead th {
    border-bottom: 2px solid var(--fg);
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: .16em;
    padding: 0 6px 12px 0;
    text-align: left;
    text-transform: uppercase;
}

.rm thead th:first-child {
    width: 170px;
}

.rm tbody th {
    font-size: 16px;
    font-weight: 800;
    padding: 0 20px 0 0;
    text-align: left;
    vertical-align: middle;
}

.rm td {
    padding: 0 8px 0 0;
    vertical-align: middle;
}

.rm-bar {
    border-radius: 4px;
    display: block;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
    padding: 16px 18px;
    transform-origin: left;
    transition: opacity .7s var(--ease), transform .8s var(--ease);
}

/* solid now, muted next, hollow later: certainty fades with distance */
.rm td[data-col="Now"] .rm-bar {
    background: var(--orange);
    color: var(--black);
}

.rm td[data-col="Next"] .rm-bar {
    background: var(--mid-silver);
    color: var(--black);
    transition-delay: .25s;
}

.rm td[data-col="Later"] .rm-bar {
    border: 1px dashed var(--line-strong);
    color: var(--fg);
    padding: 15px 17px;
    transition-delay: .5s;
}

.js .reveal:not(.is-visible) .rm-bar {
    opacity: 0;
    transform: scaleX(.2);
}

.rm-fig figcaption {
    font-family: var(--font-sans);
    font-size: 13px;
    letter-spacing: 0;
    margin-top: 22px;
    max-width: 760px;
}


/* ── FAQ ────────────────────────────────────────────── */

.faq-item {
    border-top: 1px solid var(--line);
}

.faq-item:last-child {
    border-bottom: 1px solid var(--line);
}

.faq-item summary {
    cursor: pointer;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -.01em;
    line-height: 1.35;
    list-style: none;
    padding: 16px 44px 16px 0;
    position: relative;
}

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

.faq-item summary::after {
    color: var(--accent-ink);
    content: "+";
    font-size: 26px;
    font-weight: 400;
    line-height: 1;
    position: absolute;
    right: 4px;
    top: 14px;
    transition: transform .3s var(--ease);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    color: var(--fg-soft);
    font-size: 15px;
    line-height: 1.8;
    margin: 0 0 26px;
    max-width: 680px;
    text-align: left;
}


/* the FAQ heading stays in view while its answers scroll */
@media (min-width: 961px) {
    #faq .ds-copy {
        position: sticky;
        top: calc(var(--header-h) + 32px);
    }
}

/* ── RESPONSIVE ─────────────────────────────────────── */

@media (max-width: 960px) {
    .ds-head {
        display: block;
    }

    .ds-head .section-lede {
        margin-top: 18px;
    }

    .gov-layout {
        gap: 32px;
        grid-template-columns: 1fr;
    }

    .ds-grid,
    .ds-grid--visual-left {
        gap: 56px;
        grid-template-columns: 1fr;
    }

    /* copy first, diagram second, on small screens */
    .ds-grid--visual-left .ds-copy {
        order: -1;
    }

    .ds-checks--two {
        grid-template-columns: 1fr;
    }

    .ds-checks--two li:nth-last-child(2) {
        border-bottom: 0;
    }

}

@media (max-width: 760px) {
    .rm,
    .rm tbody,
    .rm tr,
    .rm th,
    .rm td {
        display: block;
    }

    .rm thead {
        clip: rect(0 0 0 0);
        height: 1px;
        overflow: hidden;
        position: absolute;
        width: 1px;
    }

    .rm tbody tr {
        border-top: 1px solid var(--line);
        padding: 20px 0 8px;
    }

    .rm tbody th {
        margin-bottom: 12px;
        padding: 0;
    }

    .rm td {
        margin-bottom: 10px;
        padding: 0;
    }

    .rm td::before {
        color: var(--fg-muted);
        content: attr(data-col);
        display: block;
        font-family: var(--font-mono);
        font-size: 10.5px;
        letter-spacing: .14em;
        margin-bottom: 6px;
        text-transform: uppercase;
    }
}

@media (max-width: 640px) {
    .ds {
        padding-bottom: 52px;
        padding-top: 52px;
    }

    .ds-head {
        margin-bottom: 40px;
    }

    .vs th,
    .vs td {
        padding-right: 16px;
    }

    .vs tbody td:last-child {
        padding-left: 24px;
    }

    .vs-col--value {
        padding-left: 24px;
    }

    .vs tbody td:last-child::before {
        top: 20px;
    }

    .reg-field {
        grid-template-columns: 1fr;
    }

    .reg-score {
        grid-template-columns: 96px minmax(0, 1fr) 26px;
    }

    /* diagram text is sized for a 560px-wide drawing, so bump it where the drawing shrinks */
    .mx-quad,
    .mx-axis-label {
        font-size: 15px;
    }

    .mx-bub text {
        font-size: 14px;
    }

    .pyr-label {
        font-size: 16px;
    }

    .pyr-label--t1 {
        font-size: 13px;
    }

    /* the governance ring keeps its numbers; the labels move to a list underneath */
    .gov-t,
    .gov-s,
    .gov-fw {
        display: none;
    }

    .gov-core {
        font-size: 34px;
    }

    .gov-list {
        counter-reset: gl;
        display: block;
        list-style: none;
        margin: 28px 0 0;
        padding: 0;
    }

    .gov-list li {
        border-top: 1px solid var(--line);
        color: var(--fg-muted);
        counter-increment: gl;
        display: grid;
        font-size: 14px;
        gap: 2px 16px;
        grid-template-columns: 30px minmax(0, 1fr);
        line-height: 1.55;
        padding: 14px 0;
    }

    .gov-list li::before {
        color: var(--accent-ink);
        content: counter(gl, decimal-leading-zero);
        font-family: var(--font-mono);
        font-size: 12px;
        grid-row: 1 / span 2;
        padding-top: 2px;
    }

    .gov-list strong {
        color: var(--fg);
        font-size: 16px;
        font-weight: 800;
    }

    .faq-item summary {
        font-size: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .gov-orbit,
    .gov-node circle {
        animation: none !important;
    }
}


/* ═══════════════════════════════════════════════════════
   REUSABLE BLOCKS FOR ALL SERVICE PAGES
   flow (process diagram), cards, tools (comparison),
   pillars (Azure Well-Architected), text links
═══════════════════════════════════════════════════════ */

.ds-link {
    border-bottom: 1px solid var(--line-strong);
    color: var(--fg);
    transition: border-color .2s, color .2s;
}

.ds-link:hover {
    border-color: var(--accent-ink);
    color: var(--accent-ink);
}


/* ── FLOW DIAGRAM (left to right, vertical on phones) ── */

.flow {
    display: grid;
    gap: 28px;
    grid-template-columns: repeat(var(--n, 5), minmax(0, 1fr));
    list-style: none;
    margin: 0;
    padding: 0;
}

.flow--4 { --n: 4; }
.flow--5 { --n: 5; }

.flow-node {
    background: var(--bg);
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    padding: 20px 18px 22px;
    position: relative;
    transition: opacity .6s var(--ease), transform .6s var(--ease);
    transition-delay: calc(var(--i, 0) * 110ms);
}

.flow-node--hot {
    background: rgba(251, 147, 0, .08);
    border-color: var(--orange);
}

.flow-n {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
}

.flow-node h3 {
    font-size: 16px;
    font-weight: 800;
    line-height: 1.25;
    margin: 8px 0 6px;
}

.flow-node p {
    color: var(--fg-muted);
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
    text-align: left;
}

/* connector and the dot that travels along it */
.flow-node:not(:last-child)::after {
    background: linear-gradient(90deg, var(--line-strong), var(--orange));
    content: "";
    height: 2px;
    left: 100%;
    position: absolute;
    top: 50%;
    width: 28px;
}

.flow-node:not(:last-child)::before {
    animation: flowDot 2.4s linear infinite;
    animation-delay: calc(var(--i, 0) * .35s);
    background: var(--orange);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(251, 147, 0, .85);
    content: "";
    height: 6px;
    left: 100%;
    margin-top: -2px;
    opacity: 0;
    position: absolute;
    top: 50%;
    width: 6px;
    z-index: 1;
}

@keyframes flowDot {
    0% { opacity: 0; transform: translateX(0); }
    15%, 85% { opacity: 1; }
    100% { opacity: 0; transform: translateX(24px); }
}

.js .reveal:not(.is-visible) .flow-node {
    opacity: 0;
    transform: translateY(14px);
}

.flow-bar {
    border: 1px dashed var(--line-strong);
    border-radius: 8px;
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .14em;
    margin-top: 28px;
    padding: 14px 18px;
    text-align: center;
    text-transform: uppercase;
}

.flow-bar b {
    color: var(--accent-ink);
    font-weight: 700;
}


/* ── CARDS ──────────────────────────────────────────── */

.cards {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin-top: 40px;
}

.card {
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    padding: 26px 24px;
    transition: border-color .25s, transform .25s;
}

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

.card-label {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.card h3 {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -.01em;
    line-height: 1.25;
    margin: 10px 0 12px;
}

.card p {
    color: var(--fg-soft);
    font-size: 14.5px;
    line-height: 1.7;
    margin: 0;
    text-align: left;
}

.card-link {
    border-top: 1px solid var(--line);
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .1em;
    margin-top: auto;
    padding-top: 16px;
    text-transform: uppercase;
    transition: letter-spacing .2s;
}

.card:has(.card-link) p {
    margin-bottom: 20px;
}

.card-link:hover {
    letter-spacing: .16em;
}


/* ── TOOL COMPARISON ────────────────────────────────── */

.tools {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tool {
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 6px;
    border-top: 3px solid var(--orange);
    padding: 24px 22px 26px;
}

.tool h3 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -.01em;
    margin: 0 0 8px;
}

.tool dl {
    margin: 0;
}

.tool dt {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    margin-top: 16px;
    text-transform: uppercase;
}

.tool dd {
    color: var(--fg-soft);
    font-size: 14px;
    line-height: 1.65;
    margin: 6px 0 0;
}

.tool dt + dd + dt {
    color: var(--fg-muted);
}


/* ── PILLARS (Azure Well-Architected) ───────────────── */

.wa {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    list-style: none;
    margin: 0;
    padding: 0;
}

.wa-p {
    background: var(--bg);
    border: 1px solid var(--line);
    border-top: 3px solid var(--orange);
    border-radius: 4px;
    padding: 22px 18px 26px;
    transition: opacity .7s var(--ease), transform .7s var(--ease);
    transition-delay: calc(var(--i, 0) * 110ms);
}

.wa-p .flow-n {
    display: block;
    margin-bottom: 10px;
}

.wa-p h3 {
    font-size: 18px;
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 10px;
}

.wa-p p {
    color: var(--fg-muted);
    font-size: 13.5px;
    line-height: 1.65;
    margin: 0;
    text-align: left;
}

.wa-base {
    border-top: 2px solid var(--fg);
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    margin-top: 14px;
    padding-top: 10px;
    text-align: center;
    text-transform: uppercase;
}

.js .reveal:not(.is-visible) .wa-p {
    opacity: 0;
    transform: translateY(24px);
}


/* ── RESULTS ROW (owner-supplied numbers only) ─────── */

.res {
    border-bottom: 1px solid var(--line);
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    list-style: none;
    margin: 0 0 44px;
    padding: 0;
}

.res li {
    border-left: 1px solid var(--line);
    display: grid;
    gap: 12px;
    grid-template-rows: auto 1fr;
    padding: 28px 28px 28px 32px;
}

.res li:first-child {
    border-left: 0;
    padding-left: 0;
}

.res b {
    color: var(--fg);
    font-size: clamp(36px, 4.4vw, 64px);
    font-weight: 800;
    letter-spacing: -.04em;
    line-height: 1;
    white-space: nowrap;
}

.res span {
    color: var(--fg-soft);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.45;
}


/* ── PRIORITY INBOX MOCK-UP (illustrative) ──────────── */

.inbox {
    background: var(--bg);
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    box-shadow: 0 40px 80px -44px rgba(251, 147, 0, .3);
    overflow: hidden;
}

body.light-mode .inbox {
    box-shadow: 0 40px 80px -44px rgba(26, 18, 16, .35);
}

.inbox-head {
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    color: var(--fg-muted);
    display: flex;
    font-family: var(--font-mono);
    font-size: 11px;
    justify-content: space-between;
    letter-spacing: .14em;
    padding: 14px 22px;
    text-transform: uppercase;
}

.inbox-head b {
    color: var(--accent-ink);
    font-weight: 700;
}

.inbox-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.inbox-msg {
    border-bottom: 1px solid var(--line-soft);
    display: grid;
    gap: 6px 14px;
    grid-template-columns: auto minmax(0, 1fr);
    padding: 16px 22px;
    transition: opacity .6s var(--ease), transform .6s var(--ease);
    transition-delay: calc(var(--i, 0) * 110ms);
}

.inbox-tag {
    border: 1px solid var(--line-strong);
    border-radius: 50px;
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    height: fit-content;
    letter-spacing: .1em;
    padding: 3px 10px;
}

.inbox-msg.is-hot .inbox-tag {
    background: var(--orange);
    border-color: var(--orange);
    color: var(--black);
}

.inbox-msg p {
    color: var(--fg);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.45;
    margin: 0;
    text-align: left;
}

.inbox-msg small {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10.5px;
    grid-column: 2;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.inbox-profile {
    background: var(--surface);
    padding: 18px 22px 20px;
}

.inbox-profile-head {
    align-items: center;
    color: var(--fg-muted);
    display: flex;
    font-family: var(--font-mono);
    font-size: 10.5px;
    justify-content: space-between;
    letter-spacing: .12em;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.inbox-profile-head b {
    color: var(--accent-ink);
}

.inbox-bar {
    background: var(--line);
    border-radius: 4px;
    height: 6px;
    margin-bottom: 14px;
    overflow: hidden;
}

.inbox-bar i {
    background: var(--orange);
    display: block;
    height: 100%;
    transition: width 1.2s var(--ease) .5s;
    width: var(--w, 83%);
}

.inbox-fields {
    display: grid;
    gap: 6px 20px;
    grid-template-columns: 1fr 1fr;
    margin: 0;
}

.inbox-fields div {
    display: grid;
    gap: 2px;
}

.inbox-fields dt {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.inbox-fields dd {
    color: var(--fg);
    font-size: 13.5px;
    font-weight: 600;
    margin: 0;
}

.inbox-fields .is-open dd {
    color: var(--fg-muted);
    font-weight: 400;
}

.js .reveal:not(.is-visible) .inbox-msg {
    opacity: 0;
    transform: translateY(10px);
}

.js .reveal:not(.is-visible) .inbox-bar i {
    width: 0;
}

.ds .flow-spaced {
    margin-bottom: 56px;
}

@media (max-width: 640px) {
    .res {
        grid-template-columns: 1fr;
    }

    .res li {
        border-left: 0;
        border-top: 1px solid var(--line);
        padding: 20px 0;
    }

    .res li:first-child {
        border-top: 0;
    }

    .inbox-fields {
        grid-template-columns: 1fr;
    }
}

/* six items read best as 3 x 2, never 4 + 2 */
.cards--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ── RESPONSIVE (reusable blocks) ───────────────────── */

@media (max-width: 960px) {
    .cards--3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1100px) {
    .tools {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .wa {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .flow {
        gap: 28px;
        grid-template-columns: 1fr;
    }

    .flow-node:not(:last-child)::after {
        background: linear-gradient(180deg, var(--line-strong), var(--orange));
        height: 28px;
        left: 28px;
        top: 100%;
        width: 2px;
    }

    .flow-node:not(:last-child)::before {
        animation-name: flowDotDown;
        left: 26px;
        margin-top: 0;
        top: 100%;
    }

    @keyframes flowDotDown {
        0% { opacity: 0; transform: translateY(0); }
        15%, 85% { opacity: 1; }
        100% { opacity: 0; transform: translateY(24px); }
    }
}

@media (max-width: 640px) {
    .tools,
    .wa,
    .cards--3 {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .flow-node::before {
        animation: none !important;
        opacity: 0 !important;
    }
}