/* BackupSystemsCo — white/gray data center business site */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --paper: #ffffff;
  --paper-2: #f5f7fa;
  --paper-3: #edf1f6;
  --ink: #0f1b2d;
  --muted: #5d6c7f;
  --line: #dce3ec;
  --card: #ffffff;
  --navy: #0b2545;
  --navy-2: #13315c;
  --blue: #1d4ed8;
  --steel: #64748b;
  --success: #0f766e;
  --shadow: 0 20px 60px rgba(15, 27, 45, 0.10);
  --radius: 18px;
  --transition: 0.26s cubic-bezier(.2,.8,.2,1);
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}
html { scroll-behavior: smooth; }
body {
  background:
    radial-gradient(circle at 10% 2%, rgba(11,37,69,.08), transparent 34rem),
    radial-gradient(circle at 90% 0%, rgba(29,78,216,.08), transparent 30rem),
    linear-gradient(180deg, var(--paper), var(--paper-2));
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--navy); }
img { max-width: 100%; display: block; }
:focus-visible { outline: 3px solid rgba(29,78,216,.28); outline-offset: 3px; border-radius: 8px; }
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; min-height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 0 1.7rem; background: rgba(255,255,255,.84); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(220,227,236,.85); transition: box-shadow var(--transition), background var(--transition); }
.site-header.scrolled { background: rgba(255,255,255,.96); box-shadow: 0 14px 34px rgba(15,27,45,.08); }
.logo { display: inline-flex; align-items: center; gap: .55rem; color: var(--ink); font-weight: 900; letter-spacing: -.035em; font-size: 1.18rem; white-space: nowrap; }
.logo-mark { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; color: white; background: linear-gradient(135deg,var(--navy),var(--blue)); box-shadow: 0 10px 24px rgba(11,37,69,.18); font-family: var(--mono); font-size: .82rem; }
.logo span.word-accent { color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: .78rem; list-style: none; }
.nav-links a { color: var(--muted); font-size: .84rem; font-weight: 760; padding: .5rem .1rem; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--navy); border-bottom-color: var(--navy); }
.nav-cta { color: white !important; background: linear-gradient(135deg,var(--navy),var(--navy-2)); padding: .55rem .92rem !important; border-radius: 999px; border-bottom: 0 !important; box-shadow: 0 12px 26px rgba(11,37,69,.18); }
.nav-toggle { display: none; border: 0; background: var(--paper-2); border-radius: 12px; padding: .5rem; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 999px; }
section { padding: 6rem 1.4rem; }
section.alt { background: rgba(237,241,246,.72); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.container, .hero-inner, .grid-2, .grid-3, .grid-4, .stats-grid, .footer-grid, .contact-grid { width: min(1160px,100%); margin: 0 auto; }
.hero { min-height: 94vh; display: grid; align-items: center; padding: 8rem 1.4rem 5rem; }
.hero-inner { display: grid; grid-template-columns: 1.02fr .98fr; gap: 3rem; align-items: center; }
.badge, .section-label, .tag { display: inline-flex; align-items: center; gap: .4rem; width: fit-content; font-family: var(--mono); text-transform: uppercase; letter-spacing: .1em; font-size: .73rem; color: var(--navy); border: 1px solid rgba(11,37,69,.18); background: rgba(11,37,69,.06); border-radius: 999px; padding: .4rem .72rem; }
h1,h2,h3 { line-height: 1.1; letter-spacing: -.04em; }
h1 { font-size: clamp(2.55rem, 6vw, 5.2rem); margin: 1.1rem 0 1.2rem; }
.hero h1 .accent, .page-hero h1 .accent { color: var(--navy); }
.lead, .section-head p, .card p, .muted, .caption { color: var(--muted); }
.lead { font-size: 1.12rem; max-width: 690px; }
.typed-wrap { margin: 1.3rem 0 2rem; font-family: var(--mono); color: var(--blue); min-height: 1.5em; }
.cursor { animation: blink 1s step-end infinite; } @keyframes blink { 50% { opacity: 0; } }
.hero-actions { display: flex; flex-wrap: wrap; gap: .85rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .45rem; border-radius: 999px; padding: .82rem 1.28rem; border: 1px solid var(--line); background: white; color: var(--ink); font-weight: 850; box-shadow: 0 9px 28px rgba(15,27,45,.07); transition: transform var(--transition), box-shadow var(--transition), background var(--transition); cursor: pointer; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(15,27,45,.12); }
.btn-primary { color: white; background: linear-gradient(135deg,var(--navy),var(--navy-2)); border-color: transparent; }
.hero-visual, .card, .project-card, .diagram-card, .contact-form, .stat-box, .table-wrap, .faq-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-visual { padding: .85rem; overflow: hidden; transform: perspective(900px) rotateY(-4deg); }
.hero-visual img, .diagram-card img, .project-thumb img { width: 100%; border-radius: calc(var(--radius) - 8px); }
.page-hero { padding: 8.7rem 1.4rem 4.2rem; text-align: center; background: linear-gradient(180deg, rgba(11,37,69,.08), transparent); border-bottom: 1px solid var(--line); }
.page-hero p { margin: 0 auto; }
.breadcrumb { margin-top: 1.2rem; display: flex; justify-content: center; gap: .5rem; color: var(--muted); font-size: .9rem; }
.section-head { max-width: 740px; margin: 0 auto 3.2rem; text-align: center; }
.section-head h2 { font-size: clamp(1.85rem,4vw,3rem); margin: .9rem 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; }
.card, .project-card, .diagram-card { padding: 1.35rem; transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition); }
.card:hover, .project-card:hover { transform: translateY(-5px); border-color: rgba(11,37,69,.25); box-shadow: 0 26px 60px rgba(11,37,69,.10); }
.icon { width: 50px; height: 50px; display: grid; place-items: center; border-radius: 15px; background: linear-gradient(135deg, rgba(11,37,69,.10), rgba(29,78,216,.08)); font-size: 1.55rem; margin-bottom: .85rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; }
.stat-box { padding: 1.25rem; text-align: center; }
.stat-number { font-size: 2.18rem; font-weight: 950; color: var(--navy); letter-spacing: -.05em; }
.stat-label { color: var(--muted); font-size: .9rem; }
.process-list { width: min(880px,100%); margin: 0 auto; display: grid; gap: 1rem; }
.process-item { display: grid; grid-template-columns: 80px 1fr; gap: 1rem; align-items: start; }
.process-num { width: 64px; height: 64px; display: grid; place-items: center; border-radius: 16px; color: white; background: linear-gradient(135deg,var(--navy),var(--blue)); font-weight: 900; }
.process-body { background: white; border: 1px solid var(--line); border-radius: 16px; padding: 1rem; }
.filter-row { display: flex; justify-content: center; flex-wrap: wrap; gap: .65rem; margin-bottom: 2rem; }
.filter-btn { border: 1px solid var(--line); border-radius: 999px; background: white; color: var(--muted); padding: .56rem 1rem; font-weight: 800; cursor: pointer; }
.filter-btn.active, .filter-btn:hover { color: white; background: var(--navy); border-color: var(--navy); }
.project-thumb { margin-bottom: 1rem; overflow: hidden; border-radius: 14px; border: 1px solid var(--line); background: var(--paper-2); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: white; } th,td { padding: .9rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; } th { background: var(--paper-2); color: var(--ink); font-size: .83rem; text-transform: uppercase; letter-spacing: .05em; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .75rem; }
.tag { color: var(--blue); border-color: rgba(29,78,216,.18); background: rgba(29,78,216,.06); letter-spacing: .05em; text-transform: none; }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 2rem; }
.contact-item { display: flex; gap: .9rem; padding: 1rem; border: 1px solid var(--line); border-radius: 16px; background: white; margin-bottom: .8rem; }
.contact-item-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; background: var(--paper-2); }
.form-row { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.form-group { display: grid; gap: .4rem; margin-bottom: 1rem; }
.form-group label { font-weight: 800; font-size: .9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; border: 1px solid var(--line); border-radius: 13px; padding: .8rem .9rem; font: inherit; color: var(--ink); background: #fff; }
.form-group textarea { min-height: 140px; resize: vertical; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(29,78,216,.08); outline: none; }
.faq-list { width: min(850px,100%); margin: 0 auto; display: grid; gap: .85rem; }
.faq-question { width: 100%; display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 1.2rem; background: transparent; border: 0; color: var(--ink); font: inherit; font-weight: 900; text-align: left; cursor: pointer; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition); }
.faq-answer p { padding: 0 1.2rem 1.1rem; color: var(--muted); }
.faq-item.open .faq-answer { max-height: 60vh; }
footer { padding: 4rem 1.4rem 2rem; background: var(--navy); color: #dbeafe; }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(3,1fr); gap: 2rem; }
footer a { color: #bfdbfe; } footer p, footer li { color: #cbd5e1; } footer ul { list-style: none; display: grid; gap: .42rem; }
.footer-bottom { width: min(1160px,100%); margin: 2rem auto 0; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,.16); color: #cbd5e1; font-size: .86rem; }
.fade-in { opacity: 1; transform: none; }
.js .fade-in { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.js .fade-in.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 1120px) { .nav-links { gap: .42rem; } .nav-links a { font-size: .76rem; } }
@media (max-width: 980px) { .hero-inner, .grid-2, .contact-grid { grid-template-columns: 1fr; } .grid-3, .grid-4, .stats-grid, .footer-grid { grid-template-columns: repeat(2,1fr); } .hero-visual { transform: none; } }
@media (max-width: 760px) { .site-header { padding: 0 .9rem; } .nav-toggle { display: block; } .nav-links { display: none; position: fixed; top: 76px; left: .8rem; right: .8rem; flex-direction: column; align-items: stretch; gap: 0; background: white; border: 1px solid var(--line); border-radius: 18px; padding: .8rem; box-shadow: var(--shadow); } .nav-links.open { display: flex; } .nav-links a { font-size: .94rem; padding: .75rem; border-bottom: 0; } section { padding: 4.4rem 1rem; } .hero { padding: 7rem 1rem 4rem; } .page-hero { padding: 7.8rem 1rem 3rem; } .grid-3, .grid-4, .stats-grid, .footer-grid, .form-row { grid-template-columns: 1fr; } .process-item { grid-template-columns: 1fr; } }