/* ARC page and home-page feature. */
.arc-page { --arc-amber: #ffd27d; }
.arc-page :is(section, [id]) { scroll-margin-top: calc(var(--header-height) + 20px); }
.arc-page .section { padding: 56px 0; }
.arc-page .section-heading { max-width: 1000px; margin-bottom: 30px; }
.arc-page .section-heading h2, .arc-copy h2, .arc-workspace-heading h2 { margin: 0 0 18px; font-size: clamp(2rem, 3.1vw, 3.35rem); line-height: 1.1; letter-spacing: -.045em; }
.arc-page .section-heading p { margin-bottom: 0; font-size: 1.04rem; }
.arc-page .section-heading .eyebrow { margin-bottom: 14px; color: var(--cyan); font-size: .73rem; }
.arc-page .eyebrow { margin-bottom: 14px; }
.arc-hero { position: relative; padding: calc(var(--header-height) + 44px) 0 40px; background: radial-gradient(ellipse at 75% 30%, rgba(30, 159, 183, .15), transparent 55%); }
.arc-hero-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 38px; align-items: center; }
.arc-hero h1 { margin: 0 0 22px; font-size: clamp(2.8rem, 4.2vw, 4.65rem); line-height: 1.04; letter-spacing: -.055em; }
.arc-hero h1 span, .arc-home-feature h2 span { color: var(--cyan); }
.arc-hero-lead { margin: 0; color: var(--muted); font-size: 1.06rem; }
.arc-hero .hero-actions { gap: 10px; margin-top: 24px; }
.arc-hero .button { padding: 0 16px; font-size: .69rem; letter-spacing: .075em; }
.arc-platforms { display: flex; flex-wrap: wrap; gap: 9px 14px; margin-top: 20px; color: var(--muted); font-size: .7rem; letter-spacing: .09em; }
.arc-screen { min-width: 0; margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #101920; box-shadow: 0 15px 42px rgba(0, 0, 0, .28); }
.arc-screen a { display: block; }
.arc-screen img { display: block; width: 100%; height: auto; }
.arc-screen figcaption { padding: 12px 16px; color: var(--muted); font-size: .82rem; line-height: 1.55; }
.arc-screen figcaption b { color: var(--cyan); }
.arc-promises { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--line); }
.arc-promises span { display: block; margin-bottom: 7px; color: var(--cyan); font-size: .7rem; font-weight: 750; letter-spacing: .14em; }
.arc-promises b { display: block; font-size: 1.05rem; }
.arc-promises p { margin: 8px 0 0; color: var(--muted); font-size: .9rem; }
.arc-jump-links { display: flex; flex-wrap: wrap; gap: 10px 25px; padding-top: 24px; font-size: .83rem; color: var(--muted); }
.arc-jump-links a:hover { color: var(--cyan); }
.arc-split { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 38px; align-items: center; }
.arc-copy p { color: var(--muted); margin: 0 0 16px; }
.arc-copy > p:last-child { margin-bottom: 0; }
.arc-monitor-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.arc-monitor-grid h3 { margin: 0 0 9px; font-size: 1.12rem; line-height: 1.3; }
.arc-monitor-grid p { margin: 0; font-size: .93rem; }
.arc-inline-note { margin-top: 24px !important; padding: 15px 18px; border-left: 2px solid var(--cyan); background: rgba(97, 221, 255, .05); font-size: .9rem; }
.arc-inline-note strong { color: var(--text); }
.arc-control-screen { max-width: 690px; width: 100%; justify-self: center; }
.arc-health-window { aspect-ratio: 1.4; overflow: hidden; }
.arc-action-window { aspect-ratio: 2.16; overflow: hidden; }
.arc-action-window img { transform: translateY(-39.4%); }
.arc-external-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 38px; align-items: center; margin-top: 40px; padding-top: 38px; border-top: 1px solid var(--line); }
.arc-command-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.arc-command-tags span { padding: 5px 8px; border: 1px solid var(--line); border-radius: 4px; color: var(--cyan); font-size: .63rem; font-weight: 700; letter-spacing: .06em; }
.arc-small-note { color: var(--muted); font-size: .85rem; line-height: 1.6; }
.arc-external-layout .arc-small-note { margin: 13px 0 0; }
.arc-handover { margin-top: 28px; padding: 22px 24px; border: 1px solid var(--line); border-radius: 10px; background: rgba(5, 14, 22, .7); }
.arc-handover-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; list-style: none; margin: 0; padding: 0; counter-reset: handover; }
.arc-handover-steps li { counter-increment: handover; }
.arc-handover-steps b { display: block; margin-bottom: 7px; font-size: .96rem; }
.arc-handover-steps b::before { content: counter(handover, decimal-leading-zero) ' · '; color: var(--cyan); }
.arc-handover-steps span { display: block; color: var(--muted); font-size: .86rem; }
.arc-detail { border: 1px solid var(--line); border-radius: 10px; background: rgba(11, 24, 34, .65); margin-top: 18px; }
.arc-detail summary { padding: 14px 18px; cursor: pointer; color: var(--cyan); font-size: .9rem; font-weight: 650; }
.arc-detail > div { padding: 0 18px 16px; }
.arc-detail p { color: var(--muted); font-size: .88rem; }
.arc-detail p:last-child { margin-bottom: 0; }
.arc-detail code { overflow-wrap: anywhere; }
.arc-topology { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: linear-gradient(145deg, #102331, #08121b); }
.arc-operator { text-align: center; padding: 20px; border: 1px solid var(--cyan); border-radius: 8px; background: rgba(97, 221, 255, .07); }
.arc-topology b { display: block; font-size: 1.1rem; line-height: 1.4; }
.arc-topology small { display: block; color: var(--muted); margin-top: 5px; }
.arc-network { text-align: center; color: var(--cyan); font-size: .7rem; letter-spacing: .1em; padding: 20px 0; }
.arc-server-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.arc-server { text-align: center; padding: 20px 12px; border: 1px solid var(--line); border-radius: 8px; background: #0c1922; }
.arc-server:first-child { border-color: rgba(88, 232, 154, .5); }
.arc-server:last-child { border-color: rgba(255, 210, 125, .5); }
.arc-downstream { margin-top: 18px; padding: 16px 12px; border: 1px solid var(--line); border-radius: 8px; text-align: center; background: rgba(97, 221, 255, .03); }
.arc-downstream b { font-size: .9rem; }
.arc-topology-note { margin: 16px 0 0; font-size: .82rem; color: var(--muted); }
.arc-prepared-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 28px; }
.arc-prepared-card { padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: rgba(11, 24, 34, .55); }
.arc-prepared-card h3 { margin: 0 0 14px; font-size: 1.35rem; line-height: 1.3; }
.arc-prepared-card p:not(.eyebrow) { margin: 0 0 12px; color: var(--muted); font-size: .94rem; }
.arc-prepared-card p:last-child { margin-bottom: 0; }
.arc-prepared-card .text-link { margin-top: 0; font-size: .88rem; }
.arc-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 25px; counter-reset: arc-step; }
.arc-steps li { border-top: 1px solid var(--line); padding-top: 16px; counter-increment: arc-step; }
.arc-steps li::before { content: counter(arc-step, decimal-leading-zero); display: block; color: var(--cyan); font-size: 1.1rem; margin-bottom: 8px; }
.arc-steps h3 { margin: 0 0 10px; font-size: 1.1rem; line-height: 1.3; }
.arc-steps p { margin: 0; color: var(--muted); font-size: .91rem; }
.arc-steps code { overflow-wrap: anywhere; }
.arc-setup-extra { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 28px; padding: 24px; margin-top: 28px; border: 1px solid var(--line); border-radius: 10px; background: rgba(97, 221, 255, .03); }
.arc-setup-copy h3 { margin: 0 0 10px; font-size: 1.18rem; }
.arc-setup-copy p { max-width: 940px; margin: 0 0 12px; color: var(--muted); }
.arc-setup-copy p:last-child { margin-bottom: 0; }
.arc-tray-shot { width: 259px; margin: 0; }
.arc-tray-shot img { border: 1px solid var(--line); border-radius: 7px; }
.arc-tray-shot figcaption { margin-top: 8px; font-size: .76rem; color: var(--muted); }
.arc-faq { margin-top: 30px; }
.arc-faq h3 { margin: 0 0 8px; font-size: 1.25rem; }
.arc-faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.arc-faq summary { cursor: pointer; font-size: .98rem; font-weight: 650; }
.arc-faq p { margin: 12px 0 0; max-width: 1100px; color: var(--muted); font-size: .92rem; }
.arc-workspace-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: end; margin-bottom: 24px; }
.arc-workspace-heading h2 { margin-bottom: 0; }
.arc-workspace-heading > p { max-width: 660px; margin: 0; color: var(--muted); }
.arc-closing-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 15px 25px; margin-top: 22px; }
.arc-closing-actions p { margin: 0; max-width: 550px; color: var(--muted); font-size: .93rem; }
.arc-closing-actions .hero-actions { margin: 0; gap: 12px; }
.arc-closing-actions .text-link { margin: 0; font-size: .87rem; }
.arc-hero-link { display: inline-flex; gap: 9px; align-items: center; margin-top: 22px; color: var(--cyan); font-size: .96rem; font-weight: 650; }
.arc-home-feature { border-top: 1px solid var(--line-bright); border-bottom: 1px solid var(--line); background: radial-gradient(ellipse at 80% 30%, rgba(23, 126, 161, .14), transparent 60%), #071018; }
.breadth-home .arc-home-feature { padding: 60px 0; scroll-margin-top: calc(var(--header-height) + 20px); }
.arc-home-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 38px; align-items: center; }
.arc-home-feature h2 { margin: 0 0 20px; font-size: clamp(2rem, 3.1vw, 3.5rem); line-height: 1.09; letter-spacing: -.045em; }
.arc-home-feature p:not(.eyebrow) { color: var(--muted); }
.arc-home-feature .arc-home-note { margin-top: 18px; font-size: .84rem; }
.arc-home-feature .arc-screen { transform: none; }
.arc-home-feature .arc-screen figcaption { font-size: .8rem; }
:is(.arc-page, .breadth-home) :is(.arc-hero-link, .arc-jump-links a, .arc-screen a, .arc-tray-shot a, .arc-detail summary, .arc-faq summary):focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
@media (max-width: 1440px) {
    :is(.arc-page, .breadth-home) .brand span { display: none; }
}
@media (max-width: 1120px) {
    .arc-hero-layout, .arc-split, .arc-external-layout, .arc-home-layout { gap: 28px; }
    .arc-monitor-grid { gap: 18px; }
    .arc-handover-steps, .arc-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
    .arc-page .section { padding: 40px 0; }
    .arc-hero { padding: calc(var(--header-height) + 30px) 0 30px; }
    .arc-hero-layout, .arc-split, .arc-external-layout, .arc-home-layout, .arc-workspace-heading { grid-template-columns: 1fr; }
    .arc-hero h1 { font-size: clamp(2.8rem, 7.5vw, 4.2rem); }
    .arc-hero-copy { max-width: 700px; }
    .arc-promises { gap: 18px; }
    .arc-promises b { font-size: .95rem; }
    .arc-promises p { font-size: .84rem; }
    .arc-external-layout { margin-top: 30px; padding-top: 28px; }
    .arc-prepared-grid { gap: 18px; }
    .arc-prepared-card { padding: 20px; }
    .arc-workspace-heading { gap: 16px; }
    .breadth-home .arc-home-feature { padding: 44px 0; }
}
@media (max-width: 560px) {
    .arc-page .section-heading h2, .arc-copy h2, .arc-workspace-heading h2 { font-size: 2rem; }
    .arc-hero h1 { font-size: 2.85rem; }
    .arc-hero .button { font-size: .65rem; padding: 0 12px; }
    .arc-promises, .arc-monitor-grid, .arc-prepared-grid, .arc-steps { grid-template-columns: 1fr; }
    .arc-promises { gap: 15px; margin-top: 24px; }
    .arc-promises p { margin-top: 4px; }
    .arc-monitor-grid { gap: 18px; }
    .arc-handover { padding: 18px; }
    .arc-handover-steps { grid-template-columns: 1fr; gap: 16px; }
    .arc-topology { padding: 18px; }
    .arc-server-pair { gap: 12px; }
    .arc-server { padding: 18px 8px; }
    .arc-topology b { font-size: .98rem; }
    .arc-topology small { font-size: .78rem; }
    .arc-network { font-size: .61rem; letter-spacing: .06em; }
    .arc-downstream b { font-size: .8rem; }
    .arc-setup-extra { grid-template-columns: 1fr; padding: 18px; gap: 18px; }
    .arc-tray-shot { width: min(259px, 100%); }
    .arc-jump-links { gap: 10px 18px; }
    .arc-closing-actions .hero-actions { align-items: flex-start; }
}