:root {
    --navy: #0b1220;
    --navy-2: #121a2c;
    --ink: #1c2738;
    --text: #243044;
    --muted: #5c6b80;
    --line: #d7dee8;
    --bg: #f3f5f8;
    --white: #ffffff;
    --blue: #2a6fbb;
    --cyan: #2ea3c4;
    --gold: #c9a227;
    --ok: #1f8a5b;
    --shadow: 0 12px 40px rgba(11, 18, 32, 0.08);
    --radius: 14px;
    --font: "IBM Plex Sans", "Segoe UI", sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}
img { max-width: 100%; height: auto; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: #1d568f; }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; color: var(--ink); line-height: 1.2; }
p { margin: 0 0 1rem; }
ul { margin: 0; padding: 0; }
.wrap { width: min(1180px, calc(100% - 32px)); margin-inline: auto; }
.sr-only, .skip-link:not(:focus) {
    position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0);
}
.skip-link:focus {
    position: fixed; top: 8px; left: 8px; z-index: 80; background: #fff; padding: 8px 12px;
}

.topbar {
    background: var(--navy);
    color: #c9d4e4;
    font-size: 0.85rem;
}
.topbar-inner {
    display: flex; gap: 22px; flex-wrap: wrap; padding: 8px 0; align-items: center;
}
.topbar a { color: #d5deea; display: inline-flex; gap: 8px; align-items: center; }
.topbar a:hover { color: #fff; }
.topbar svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.7; }

.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 74px; }
.brand img { display: block; height: 48px; width: auto; }
.nav { display: flex; align-items: center; gap: 14px; }
.nav-list { display: flex; align-items: center; gap: 2px; list-style: none; flex-wrap: wrap; justify-content: flex-end; }
.nav-list > li > a {
    display: block; padding: 8px 9px; color: var(--ink); font-size: 0.86rem; font-weight: 500; border-radius: 8px;
}
.nav-list > li > a:hover, .nav-list > li > a.is-active { background: #eef3f8; color: var(--blue); }
.has-sub { position: relative; }
.subnav {
    display: none; position: absolute; top: 100%; left: 0; min-width: 220px;
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    box-shadow: var(--shadow); padding: 8px; list-style: none; z-index: 20;
}
.has-sub:hover .subnav, .has-sub:focus-within .subnav { display: block; }
.subnav a { display: block; padding: 8px 10px; color: var(--ink); border-radius: 8px; font-size: 0.9rem; }
.subnav a:hover { background: #eef3f8; }
.nav-toggle {
    display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); margin: 6px 10px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    border-radius: 999px; padding: 12px 20px; font-weight: 600; border: 1px solid transparent;
    font-size: 0.95rem; cursor: pointer; font-family: inherit;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #1f5a99; color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.08); color: #fff; }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.btn-sm { padding: 9px 14px; font-size: 0.85rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

.hero {
    background:
        radial-gradient(1200px 400px at 80% -10%, rgba(46,163,196,.18), transparent 50%),
        linear-gradient(180deg, var(--navy) 0%, #0e1730 100%);
    color: #e8eef7;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(circle at 70% 40%, #000 20%, transparent 75%);
    pointer-events: none;
}
.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 48px;
    align-items: center;
    padding: 72px 0 64px;
}
.eyebrow {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 12px;
}
.hero h1 {
    color: #fff;
    font-size: clamp(2.1rem, 4.4vw, 3.5rem);
    margin: 0 0 16px;
    max-width: 14ch;
}
.hero .lead {
    font-size: 1.15rem;
    color: #c5d0e0;
    max-width: 42ch;
}
.hero-visual { position: relative; min-height: 320px; }
.rack {
    display: grid; gap: 10px;
    background: linear-gradient(180deg, #18233a, #10182b);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 18px;
    padding: 18px;
    box-shadow: 0 30px 60px rgba(0,0,0,.35);
}
.u {
    display: flex; align-items: center; gap: 10px;
    background: #0c1322;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: #9fb0c8;
}
.led { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.led.cyan { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.led.gold { background: var(--gold); box-shadow: 0 0 8px var(--gold); }
.u-bars { margin-left: auto; display: flex; gap: 3px; height: 14px; align-items: flex-end; }
.u-bars i { width: 4px; background: #2a6fbb; display: block; border-radius: 2px; opacity: .7; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.hero-tags span, .chip-list li {
    font-family: var(--mono); font-size: 0.75rem;
    border: 1px solid rgba(255,255,255,.14);
    padding: 5px 9px; border-radius: 999px; color: #c9d6e8;
}
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.chip-list li { color: var(--ink); border-color: var(--line); background: #fff; }

.strip {
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.strip-inner {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    padding: 18px 0;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--muted);
    text-align: center;
}

.section { padding: 84px 0; }
.section-alt { background: #fff; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 0 0 12px; }
.kicker { font-family: var(--mono); font-size: 0.78rem; color: var(--cyan); letter-spacing: .08em; text-transform: uppercase; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
}
.card h3 { margin: 10px 0 8px; font-size: 1.15rem; }
.icon-badge {
    width: 42px; height: 42px; border-radius: 12px;
    display: grid; place-items: center;
    background: #eaf3fb; color: var(--blue);
}
.icon-badge svg, .card svg, .list-ico svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.card a.more { font-weight: 600; font-size: 0.9rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.tag-grid { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 16px 0 24px; }
.tag-grid li {
    background: #eef3f8; color: var(--ink); padding: 7px 11px; border-radius: 999px; font-size: 0.85rem;
}
.highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; list-style: none; margin: 18px 0 24px; }
.highlights li {
    background: var(--navy-2); color: #dce6f3; padding: 12px 14px; border-radius: 10px; font-size: 0.9rem;
}

.diagram {
    background: var(--navy);
    color: #d5deea;
    border-radius: 18px;
    padding: 24px;
    margin: 0;
}
.diagram figcaption {
    font-family: var(--mono); font-size: 0.75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); margin-bottom: 16px;
}
.diagram-flow { display: flex; flex-direction: column; align-items: center; gap: 0; }
.d-node {
    min-width: 180px; text-align: center; padding: 10px 16px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,.14); font-family: var(--mono); font-size: 0.85rem;
}
.d-internet { background: #1a2744; }
.d-fw { background: #3a2a12; color: #f0d48a; border-color: rgba(201,162,39,.35); }
.d-px { background: #123246; color: #9fe3f3; border-color: rgba(46,163,196,.4); }
.d-line { width: 2px; height: 18px; background: rgba(255,255,255,.25); }
.d-rack {
    width: 100%; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
    border: 1px dashed rgba(255,255,255,.18); border-radius: 12px; padding: 12px; margin-top: 4px;
}
.d-rack span {
    background: #0c1322; padding: 10px 8px; text-align: center; border-radius: 8px; font-size: 0.8rem;
}
.diagram-note { font-size: 0.85rem; color: #9aabc2; margin: 16px 0 0; }

.backup-chain {
    list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; counter-reset: step;
}
.backup-chain li {
    background: #0c1322; border: 1px solid rgba(255,255,255,.1); border-radius: 12px; padding: 14px;
    position: relative;
}
.backup-chain strong { display: block; color: #fff; margin-bottom: 4px; }
.backup-chain span { font-size: 0.82rem; color: #9aabc2; }

.email-teaser {
    display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px;
    background: linear-gradient(135deg, #102036, #16324a);
    color: #e6eef8; border-radius: 20px; padding: 36px;
}
.email-teaser h2 { color: #fff; margin: 0 0 10px; }
.email-price { font-size: 1.35rem; font-weight: 600; color: #fff; }
.email-teaser .chip-list li { background: transparent; color: #d7e4f3; border-color: rgba(255,255,255,.18); }
.email-teaser-panel {
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
    border-radius: 16px; padding: 20px;
}
.panel-kicker { font-weight: 600; color: #fff; }
.plan-mini { list-style: none; margin: 12px 0; }
.plan-mini li { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.fineprint { font-size: 0.8rem; color: #9aabc2; }
.email-teaser a.btn-primary { margin-top: 8px; }

.cta-final {
    background: var(--navy);
    color: #d7e0ec;
    padding: 72px 0;
}
.cta-final h2 { color: #fff; font-size: clamp(1.8rem, 3vw, 2.5rem); margin: 0 0 12px; }
.cta-final-inner { max-width: 720px; }

.site-footer { background: #080d16; color: #a9b6c8; padding: 48px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 28px; }
.footer-logo { height: 44px; width: auto; margin-bottom: 10px; background: #fff; border-radius: 8px; padding: 4px 8px; }
.footer-lead { color: #d5deea; }
.site-footer h2 { color: #fff; font-size: 0.95rem; margin: 0 0 10px; }
.site-footer ul { list-style: none; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: #c5d0e0; }
.site-footer a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 8px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; flex: 0 0 16px; margin-top: 3px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 28px; padding-top: 16px; font-size: 0.85rem; }
.muted { color: var(--muted); }

.page-hero {
    background: var(--navy); color: #d7e0ec; padding: 56px 0 40px;
}
.page-hero h1 { color: #fff; font-size: clamp(1.8rem, 3.4vw, 2.7rem); margin: 0 0 12px; max-width: 18ch; }
.crumbs { font-size: 0.85rem; color: #8ea0b8; margin-bottom: 12px; }
.crumbs a { color: #b9c9dc; }
.prose { max-width: 720px; }
.prose h2 { margin-top: 2rem; }
.check-list { list-style: none; display: grid; gap: 8px; }
.check-list li {
    display: flex; gap: 10px; align-items: flex-start;
    background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px;
}
.check-list svg { width: 18px; height: 18px; color: var(--ok); flex: 0 0 18px; margin-top: 2px; fill: none; stroke: currentColor; stroke-width: 2; }

.form {
    display: grid; gap: 14px; background: #fff; border: 1px solid var(--line);
    border-radius: 16px; padding: 24px; box-shadow: var(--shadow);
}
.form label { font-weight: 600; font-size: 0.9rem; display: block; margin-bottom: 6px; }
.form input, .form select, .form textarea {
    width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px;
    font: inherit; background: #fff; color: var(--ink);
}
.form textarea { min-height: 140px; resize: vertical; }
.form .hp { position: absolute; left: -9999px; }
.alert { padding: 12px 14px; border-radius: 10px; }
.alert-ok { background: #e8f7ef; color: #135c38; }
.alert-err { background: #fdecea; color: #8a1f16; }
.field-error { color: #a1261c; font-size: 0.82rem; margin-top: 4px; }

.flow-list { list-style: none; display: grid; gap: 10px; }
.flow-list li {
    display: grid; grid-template-columns: 90px 1fr; gap: 12px; align-items: center;
    background: #fff; border: 1px solid var(--line); padding: 12px; border-radius: 10px;
}
.flow-list b { font-family: var(--mono); font-size: 0.8rem; color: var(--blue); }

.btn:focus-visible, .nav-list a:focus-visible, .form input:focus-visible, .form select:focus-visible, .form textarea:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
}

@media (max-width: 1360px) {
    .nav-wide { display: none; }
}

@media (max-width: 1080px) {
    .nav-toggle { display: block; }
    .nav {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: #fff; border-bottom: 1px solid var(--line); padding: 12px 16px 20px;
        flex-direction: column; align-items: stretch;
    }
    .nav.is-open { display: flex; }
    .nav-list { flex-direction: column; align-items: stretch; }
    .nav-wide { display: list-item; }
    .subnav { position: static; display: block; box-shadow: none; border: 0; padding-left: 10px; }
    .hero-grid, .split, .cards, .footer-grid, .email-teaser, .highlights, .backup-chain, .strip-inner {
        grid-template-columns: 1fr;
    }
    .cards { grid-template-columns: 1fr; }
}

@media (min-width: 700px) and (max-width: 1079px) {
    .cards { grid-template-columns: 1fr 1fr; }
    .backup-chain, .strip-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 699px) {
    .hero-grid { padding: 40px 0 36px; }
    .section { padding: 56px 0; }
    .d-rack { grid-template-columns: 1fr 1fr; }
    .flow-list li { grid-template-columns: 1fr; }
    .topbar-inner { justify-content: center; }
}