/* AS198831 — clean network documentation */
:root {
    --navy: #162E62;
    --blue: #1570EF;
    --ink: #121826;
    --muted: #5c6b82;
    --line: #e4e8ef;
    --bg: #ffffff;
    --bg-soft: #f5f7fa;
    --font: "IBM Plex Sans", "Segoe UI", sans-serif;
    --display: "Space Grotesk", "IBM Plex Sans", sans-serif;
    --mono: "JetBrains Mono", ui-monospace, monospace;
    --wrap: min(1080px, calc(100% - 2rem));
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); font-size: 0.9em; }
.wrap { width: var(--wrap); margin-inline: auto; }
.muted { color: var(--muted); }

/* Header */
.site-header {
    border-bottom: 1px solid var(--line);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 50;
}
.header-inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: 64px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    color: var(--ink);
    flex-shrink: 0;
    text-decoration: none;
}
.brand:hover { text-decoration: none; color: var(--ink); }
.brand-logo {
    height: 24px;
    width: auto;
    /* logo-mono is white — force navy on light header */
    filter: brightness(0) saturate(100%) invert(16%) sepia(42%) saturate(1400%) hue-rotate(199deg) brightness(92%) contrast(95%);
}
.brand-asn {
    font-family: var(--mono);
    font-size: .8rem;
    font-weight: 500;
    color: var(--navy);
    border-left: 1px solid var(--line);
    padding-left: .65rem;
}
.nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-left: auto;
}
.nav a {
    color: var(--muted);
    font-size: .92rem;
    font-weight: 500;
    text-decoration: none;
}
.nav a:hover,
.nav a.active {
    color: var(--navy);
    text-decoration: none;
}
.header-actions { display: flex; align-items: center; gap: .75rem; }
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
    padding: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 16px;
    height: 1.5px;
    background: var(--ink);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font);
    font-weight: 560;
    font-size: .9rem;
    padding: .55rem 1rem;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary {
    background: var(--navy);
    color: #fff;
    border-color: var(--navy);
}
.btn-primary:hover { background: #0f2149; color: #fff; }
.btn-ghost {
    background: #fff;
    border-color: var(--line);
    color: var(--ink);
}
.btn-ghost:hover { border-color: #c9d1de; color: var(--ink); }

/* Hero */
.hero {
    padding: 3.5rem 0 2.5rem;
    border-bottom: 1px solid var(--line);
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 3rem;
    align-items: start;
}
.eyebrow {
    font-family: var(--mono);
    font-size: .75rem;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: .85rem;
}
.hero h1 {
    font-family: var(--display);
    font-size: clamp(1.9rem, 3.5vw, 2.6rem);
    line-height: 1.15;
    font-weight: 650;
    letter-spacing: -0.02em;
    color: var(--navy);
    margin: 0 0 .85rem;
}
.hero-lead {
    font-size: 1.05rem;
    color: var(--muted);
    max-width: 34rem;
    margin: 0 0 1.5rem;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: .6rem; }

.fact-list {
    border: 1px solid var(--line);
    background: var(--bg-soft);
}
.fact-list h3 {
    margin: 0;
    padding: .85rem 1rem;
    font-family: var(--display);
    font-size: .85rem;
    font-weight: 600;
    color: var(--navy);
    border-bottom: 1px solid var(--line);
    background: #fff;
}
.kv { margin: 0; }
.kv-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    padding: .7rem 1rem;
    border-bottom: 1px solid var(--line);
    margin: 0;
}
.kv-row:last-child { border-bottom: 0; }
.kv-row dt { color: var(--muted); font-size: .9rem; }
.kv-row dd {
    margin: 0;
    font-family: var(--mono);
    font-size: .85rem;
    font-weight: 500;
    color: var(--ink);
    text-align: right;
}
.copyable { cursor: pointer; }
.copyable:hover { color: var(--blue); }

/* Sections */
.section { padding: 2.75rem 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}
.section-head h2 {
    font-family: var(--display);
    font-size: 1.35rem;
    letter-spacing: -0.01em;
    color: var(--navy);
    margin: 0 0 .25rem;
}
.section-head p { margin: 0; color: var(--muted); font-size: .95rem; }

.metro-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid var(--line);
}
.metro-item {
    padding: 1.1rem 1.15rem;
    border-right: 1px solid var(--line);
}
.metro-item:last-child { border-right: 0; }
.metro-item .code {
    font-family: var(--mono);
    font-size: .72rem;
    color: var(--muted);
    letter-spacing: .04em;
}
.metro-item h3 {
    margin: .3rem 0 .15rem;
    font-family: var(--display);
    font-size: 1.1rem;
    color: var(--navy);
    font-weight: 600;
}
.metro-item p { margin: 0; color: var(--muted); font-size: .9rem; }

.table-wrap {
    border: 1px solid var(--line);
    overflow-x: auto;
    background: #fff;
}
.fac-table, .ix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .92rem;
}
.fac-table th, .ix-table th,
.fac-table td, .ix-table td {
    text-align: left;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--line);
}
.fac-table tr:last-child td,
.ix-table tr:last-child td { border-bottom: 0; }
.fac-table th, .ix-table th {
    color: var(--muted);
    font-weight: 500;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    background: var(--bg-soft);
}
.status { color: var(--muted); font-size: .9rem; }

.list-plain {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: .65rem;
}
.list-plain li {
    padding-left: 1rem;
    border-left: 2px solid var(--line);
    color: var(--muted);
}

.page-hero {
    padding: 2.5rem 0 1.5rem;
    border-bottom: 1px solid var(--line);
}
.page-hero h1 {
    font-family: var(--display);
    font-size: clamp(1.7rem, 3vw, 2.2rem);
    letter-spacing: -0.02em;
    color: var(--navy);
    margin: 0 0 .5rem;
}
.page-hero p {
    margin: 0;
    color: var(--muted);
    max-width: 40rem;
    font-size: 1rem;
}

.block {
    border: 1px solid var(--line);
    padding: 1.15rem 1.2rem;
    background: #fff;
}
.block h3 {
    margin: 0 0 .65rem;
    font-family: var(--display);
    font-size: 1rem;
    color: var(--navy);
}
.block p { margin: 0; color: var(--muted); }
.block .actions { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.block-value {
    font-family: var(--display);
    font-size: 1.35rem;
    font-weight: 650;
    color: var(--navy);
    margin: .35rem 0 .5rem;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }

.contact-row {
    display: grid;
    grid-template-columns: 1.1fr 1fr 1.4fr;
    gap: 0;
    border: 1px solid var(--line);
}
.contact-row > div {
    padding: 1.1rem 1.2rem;
    border-right: 1px solid var(--line);
}
.contact-row > div:last-child { border-right: 0; }
.contact-row .role {
    color: var(--muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: .35rem;
}
.contact-row .name {
    font-family: var(--display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--navy);
    margin-bottom: .25rem;
}
.contact-row a { font-family: var(--mono); font-size: .88rem; }

/* Footer */
.site-footer {
    margin-top: 1rem;
    border-top: 1px solid var(--line);
    background: var(--bg-soft);
    padding: 2.5rem 0 1.25rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 2rem;
    margin-bottom: 2rem;
}
.footer-brand p {
    color: var(--muted);
    max-width: 24rem;
    margin: .85rem 0 0;
    font-size: .92rem;
}
.site-footer h4 {
    margin: 0 0 .75rem;
    font-family: var(--display);
    font-size: .85rem;
    color: var(--navy);
}
.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: .4rem;
}
.site-footer a { color: var(--muted); font-size: .92rem; }
.site-footer a:hover { color: var(--navy); }
.mono-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
    font-size: .88rem;
}
.mono-list code { color: var(--ink); cursor: pointer; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .85rem;
}
.footer-bottom p { margin: 0; }

.toast {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--navy);
    color: #fff;
    padding: .5rem .9rem;
    border-radius: 4px;
    font-size: .85rem;
    z-index: 100;
}

.loc {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
}
.flag {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 2px;
    flex-shrink: 0;
}

.tag-box {
    border: 1px solid var(--line);
    padding: 1.1rem 1.15rem;
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    align-items: center;
    background: #fff;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: .35rem .7rem;
    border: 1px solid #c9d4e8;
    color: var(--navy);
    font-family: var(--mono);
    font-size: .82rem;
    border-radius: 4px;
    background: var(--bg-soft);
}
.tag-link {
    margin-left: auto;
    font-size: .9rem;
    color: var(--blue);
}
.tag-link:hover { color: var(--navy); }

.info-card {
    border: 1px solid var(--line);
    background: var(--bg-soft);
    padding: 1.1rem 1.2rem;
}
.info-label {
    color: var(--muted);
    font-size: .8rem;
    margin-bottom: .45rem;
}
.info-value {
    font-family: var(--mono);
    font-size: 1.05rem;
    font-weight: 560;
    color: var(--navy);
}
.info-split {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    font-family: var(--font);
    font-weight: 500;
}
.info-split strong {
    font-family: var(--display);
    font-size: 1.35rem;
    color: var(--navy);
}

.comm {
    display: inline-block;
    padding: .25rem .55rem;
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 4px;
    color: var(--navy);
    cursor: pointer;
}
.bgp-table .bgp-location {
    vertical-align: top;
    font-weight: 600;
    color: var(--navy);
    white-space: nowrap;
    background: var(--bg-soft);
}
.bgp-table td {
    vertical-align: middle;
}
.warn {
    margin-top: .55rem;
    padding: .65rem .75rem;
    border: 1px solid #e8d39a;
    background: #fff8e6;
    color: #6a5410;
    font-size: .88rem;
    border-radius: 4px;
}

.pop-map {
    width: 100%;
    height: min(480px, 62vw);
    min-height: 320px;
    border: 1px solid var(--line);
    background: var(--bg-soft);
    z-index: 0;
}
.pop-marker {
    background: transparent;
    border: 0;
}
.pop-marker span {
    display: block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--navy);
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px var(--navy);
}
.leaflet-popup-content {
    font-family: var(--font);
    font-size: .9rem;
    line-height: 1.4;
    margin: .7rem .85rem;
}
.leaflet-popup-content strong {
    font-family: var(--display);
    color: var(--navy);
}
.map-focus {
    appearance: none;
    background: transparent;
    border: 0;
    color: var(--blue);
    font: inherit;
    font-size: .88rem;
    cursor: pointer;
    padding: 0;
}
.map-focus:hover { text-decoration: underline; color: var(--navy); }

.provider-name {
    display: block;
    font-weight: 600;
    color: var(--navy);
}
.provider-fac {
    display: block;
    font-size: .8rem;
    margin-top: .15rem;
}
.port-badge {
    display: inline-flex;
    align-items: center;
    font-family: var(--mono);
    font-size: .78rem;
    font-weight: 560;
    padding: .28rem .65rem;
    border-radius: 999px;
    border: 1px solid;
    white-space: nowrap;
}
.port-blue {
    color: #1570EF;
    border-color: #8bb8f7;
    background: #eef5ff;
}
.port-amber {
    color: #a16207;
    border-color: #e8c36a;
    background: #fff8e6;
}
.port-green {
    color: #0f7a45;
    border-color: #8fd4b0;
    background: #eefaf3;
}
.pop-status {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    font-size: .9rem;
    color: var(--muted);
}
.pop-status i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.pop-status.yes { color: #0f7a45; }
.pop-status.yes i { background: #22c55e; box-shadow: 0 0 0 3px rgba(34, 197, 94, .18); }
.pop-status.no { color: #b42318; }
.pop-status.no i { background: #ef4444; box-shadow: 0 0 0 3px rgba(239, 68, 68, .15); }

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--line);
}
.tech-grid-lg {
    grid-template-columns: 1fr 1fr;
}
.tech-item {
    padding: 1.25rem 1.2rem;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: #fff;
}
.tech-item-lg {
    padding: 2rem 1.75rem;
    min-height: 220px;
}
.tech-item:nth-child(3n) { border-right: 0; }
.tech-item:nth-last-child(-n+3) { border-bottom: 0; }
.tech-grid-lg .tech-item { border-bottom: 0; }
.tech-grid-lg .tech-item:nth-child(2n) { border-right: 0; }
.tech-grid-lg .tech-item:nth-child(3n) { border-right: 1px solid var(--line); }
.tech-logo {
    height: 48px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    margin-bottom: 1.25rem;
    display: block;
}
.tech-name {
    font-family: var(--display);
    font-size: 1.45rem;
    font-weight: 650;
    color: var(--navy);
}
.tech-role {
    font-family: var(--mono);
    font-size: .8rem;
    color: var(--muted);
    margin: .4rem 0 .85rem;
    letter-spacing: .02em;
}
.tech-item p {
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    max-width: 28rem;
}

.cap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid var(--line);
}
.cap-item {
    padding: 1.35rem 1.2rem;
    border-right: 1px solid var(--line);
    background: #fff;
}
.cap-item:last-child { border-right: 0; }
.cap-item h3 {
    margin: 0 0 .55rem;
    font-family: var(--display);
    font-size: 1.05rem;
    color: var(--navy);
}
.cap-item p {
    margin: 0;
    color: var(--muted);
    font-size: .92rem;
}

.lg-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    flex-wrap: wrap;
    border: 1px solid var(--line);
    background: var(--bg-soft);
    padding: 1.35rem 1.4rem;
}
.lg-banner p {
    margin: 0;
    color: var(--muted);
    font-size: 1.02rem;
}

@media (max-width: 900px) {
    .hero-grid,
    .grid-2,
    .grid-3,
    .footer-grid,
    .metro-list,
    .contact-row,
    .tech-grid,
    .cap-grid {
        grid-template-columns: 1fr 1fr;
    }
    .metro-item:nth-child(2) { border-right: 0; }
    .metro-item:nth-child(3),
    .metro-item:nth-child(4) { border-top: 1px solid var(--line); }
    .tech-item:nth-child(3n) { border-right: 1px solid var(--line); }
    .tech-item:nth-child(2n) { border-right: 0; }
    .tech-item:nth-last-child(-n+3) { border-bottom: 1px solid var(--line); }
    .tech-item:nth-last-child(-n+2) { border-bottom: 0; }
    .tech-grid-lg .tech-item { border-bottom: 0; }
    .cap-item:nth-child(2n) { border-right: 0; }
    .cap-item:nth-child(n+3) { border-top: 1px solid var(--line); }
    .contact-row > div:nth-child(2) { border-right: 0; }
    .contact-row > div:nth-child(3) {
        border-top: 1px solid var(--line);
        grid-column: 1 / -1;
    }
}
@media (max-width: 720px) {
    .nav-toggle { display: inline-flex; }
    .nav {
        display: none;
        position: absolute;
        left: 1rem;
        right: 1rem;
        top: 64px;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: .5rem 0;
        background: #fff;
        border: 1px solid var(--line);
    }
    .nav a { padding: .7rem 1rem; }
    .nav.open { display: flex; }
    .header-actions .btn-ghost { display: none; }
    .hero-grid,
    .grid-2,
    .grid-3,
    .footer-grid,
    .metro-list,
    .contact-row,
    .tech-grid,
    .cap-grid {
        grid-template-columns: 1fr;
    }
    .metro-item,
    .contact-row > div,
    .tech-item,
    .cap-item {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }
    .metro-item:last-child,
    .contact-row > div:last-child,
    .tech-item:last-child,
    .cap-item:last-child { border-bottom: 0; }
    .metro-item:nth-child(n),
    .contact-row > div:nth-child(n),
    .tech-item:nth-child(n),
    .cap-item:nth-child(n) {
        border-top: 0;
        border-right: 0;
        grid-column: auto;
    }
    .tech-grid-lg .tech-item { border-bottom: 1px solid var(--line); }
    .tech-grid-lg .tech-item:last-child { border-bottom: 0; }
}