/* ============================================================
   ZRE — Integrated Computer Systems Design
   Light theme · Azure accent #0284C7
   ============================================================ */

:root {
  --paper: #F4F7FA;
  --surface: #FFFFFF;
  --ink: #101827;
  --ink-soft: #24324A;
  --muted: #4B5563;
  --azure: #0284C7;
  --azure-dark: #0369A1;
  --azure-deep: #075985;
  --azure-light: #7DD3FC;
  --azure-pale: #F0F9FF;
  --azure-tint: #E3F3FC;
  --line: #DDE7F0;
  --line-strong: #C7D6E4;
  --navy: #0C1524;
  --navy-soft: #13203A;
  --font-body: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.12; color: var(--ink); letter-spacing: -0.02em; }

/* ---------- Scroll reveal (safe without JS) ---------- */
.fade-up { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: none; }

/* ---------- Buttons ---------- */
.btn { display: inline-block; font-family: var(--font-display); font-weight: 600; font-size: 15px; padding: 14px 26px; border-radius: 10px; border: 2px solid transparent; cursor: pointer; transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background-color: var(--azure); color: #FFFFFF; }
.btn-primary:hover { background-color: var(--azure-dark); }
.btn-ghost { background-color: transparent; color: var(--azure-dark); border-color: var(--azure-light); }
.btn-ghost:hover { background-color: var(--azure-pale); border-color: var(--azure); }
.btn-light { background-color: #FFFFFF; color: var(--azure-deep); }
.btn-light:hover { background-color: var(--azure-pale); }
.btn-outline-light { background-color: transparent; color: #FFFFFF; border: 2px solid rgba(255, 255, 255, 0.55); }
.btn-outline-light:hover { border: 2px solid #FFFFFF; background: rgba(255, 255, 255, 0.08); }

/* ============================================================
   COMPASS NAVIGATION
   ============================================================ */
.compass-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.compass-rose { color: var(--azure); display: inline-flex; }
.brand-word { font-family: var(--font-display); font-weight: 700; font-size: 22px; letter-spacing: 0.08em; color: var(--ink); }
.nav-links { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--muted); padding: 6px 2px; transition: color 0.16s ease; }
.nav-links a:hover { color: var(--azure-dark); }
.tick { width: 1px; height: 16px; background-color: var(--line-strong); }
.nav-cta {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  color: #FFFFFF;
  background-color: var(--azure);
  padding: 10px 18px;
  border-radius: 8px;
  transition: background-color 0.16s ease;
  white-space: nowrap;
}
.nav-cta:hover { background-color: var(--azure-dark); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background-color: var(--ink); border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-mobile { display: none; }

/* ============================================================
   RADAR-SCREEN HERO
   ============================================================ */
.radar-hero {
  position: relative;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--paper) 100%);
  padding: 88px 0 96px;
  overflow: hidden;
}
.radar-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(221, 231, 240, 0.35) 1px, transparent 1px), linear-gradient(90deg, rgba(221, 231, 240, 0.35) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--azure-deep);
  background-color: var(--azure-pale);
  border: 1px solid var(--azure-light);
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero-copy h1 { font-size: 52px; margin-bottom: 22px; }
.hero-sub { font-size: 18px; color: var(--muted); max-width: 560px; margin-bottom: 32px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; display: flex; flex-direction: column; align-items: center; }
.hero-caption { margin-top: 18px; font-size: 13px; color: var(--muted); }

.radar-screen {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 2px solid var(--azure-light);
  box-shadow: 0 40px 70px -40px #0369A1;
}
.radar-ring { position: absolute; border-radius: 50%; border: 1px solid var(--azure-tint); background-color: transparent; }
.ring-1 { inset: 14%; border-color: #BAE6FD; }
.ring-2 { inset: 32%; }
.ring-3 { inset: 50%; }
.radar-line { position: absolute; background-color: #CFE9FB; }
.radar-line-v { left: 50%; top: 0; bottom: 0; width: 1px; transform: translateX(-50%); }
.radar-line-h { top: 50%; left: 0; right: 0; height: 1px; transform: translateY(-50%); }
.radar-line-d1 { left: 50%; top: 50%; width: 1px; height: 142%; transform: translate(-50%, -50%) rotate(45deg); }
.radar-line-d2 { left: 50%; top: 50%; width: 1px; height: 142%; transform: translate(-50%, -50%) rotate(-45deg); }
.radar-sweep {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(2, 132, 199, 0.30) 0deg, rgba(2, 132, 199, 0.30) 52deg, transparent 52deg);
  animation: radar-spin 5s linear infinite;
}
.radar-hub { position: absolute; left: 50%; top: 50%; width: 12px; height: 12px; border-radius: 50%; background-color: var(--azure); transform: translate(-50%, -50%); box-shadow: 0 0 0 4px #FFFFFF, 0 0 0 6px var(--azure-light); }
.radar-dot { position: absolute; }
.radar-dot i { display: block; width: 11px; height: 11px; border-radius: 50%; background-color: var(--azure-dark); box-shadow: 0 0 0 4px var(--azure-light); animation: radar-ping 2.4s ease-out infinite; }
.radar-dot em {
  position: absolute;
  top: 50%;
  left: 22px;
  transform: translateY(-50%);
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--azure-deep);
  background-color: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 7px;
  white-space: nowrap;
}
.dot-a { left: 32%; top: 18%; }
.dot-b { left: 70%; top: 40%; }
.dot-c { left: 46%; top: 66%; }
.dot-d { left: 22%; top: 58%; }

@keyframes radar-spin { to { transform: rotate(360deg); } }
@keyframes radar-ping { 0% { box-shadow: 0 0 0 0 rgba(2, 132, 199, 0.45), 0 0 0 4px var(--azure-light); } 70% { box-shadow: 0 0 0 16px rgba(2, 132, 199, 0), 0 0 0 4px var(--azure-light); } 100% { box-shadow: 0 0 0 0 rgba(2, 132, 199, 0), 0 0 0 4px var(--azure-light); } }

/* ============================================================
   STATEMENT ROW
   ============================================================ */
.statement-row { background-color: var(--navy); padding: 96px 0; }
.statement-eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--azure-light); margin-bottom: 24px; }
.statement-text { font-family: var(--font-display); font-size: 34px; line-height: 1.32; color: #FFFFFF; max-width: 980px; font-weight: 600; }

/* ============================================================
   STATS
   ============================================================ */
.stats-section { background-color: #FFFFFF; border-bottom: 1px solid var(--line); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background-color: var(--line); }
.stat { background-color: #FFFFFF; padding: 52px 28px; text-align: left; }
.stat-num { display: block; font-family: var(--font-display); font-weight: 700; font-size: 54px; color: var(--azure); letter-spacing: -0.03em; line-height: 1; }
.stat-label { display: block; margin-top: 12px; font-size: 15px; color: var(--muted); }

/* ============================================================
   SECTION HEAD
   ============================================================ */
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; max-width: 1160px; }
.section-eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--azure-dark); margin-bottom: 14px; }
.section-title { font-size: 36px; }
.section-lead { font-size: 17px; color: var(--muted); margin-top: 16px; }

/* ============================================================
   PROCESS
   ============================================================ */
.process-section { background-color: var(--paper); padding: 96px 0; }
.process-list { list-style: none; max-width: 860px; margin: 0 auto; position: relative; }
.process-list::before { content: ""; position: absolute; left: 38px; top: 20px; bottom: 20px; width: 2px; background-color: var(--azure-light); }
.process-step { display: flex; gap: 32px; padding: 24px 0; position: relative; }
.step-num {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 2px solid var(--azure-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--azure-dark);
  z-index: 1;
}
.step-body { padding-top: 6px; }
.step-body h3 { font-size: 22px; margin-bottom: 8px; }
.step-body p { color: var(--muted); max-width: 620px; }

/* ============================================================
   CAPABILITIES — HORIZONTAL SCROLL ROW
   ============================================================ */
.capabilities-section { background-color: #FFFFFF; padding: 96px 0; border-top: 1px solid var(--line); }
.scroll-controls { display: flex; gap: 10px; }
.scroll-btn {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background-color: #FFFFFF;
  color: var(--azure-dark);
  font-size: 18px;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}
.scroll-btn:hover { background-color: var(--azure); border-color: var(--azure); color: #FFFFFF; }
.scroll-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 300px;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 24px 28px;
  max-width: 1160px;
  margin: 0 auto;
  scrollbar-width: thin;
  scrollbar-color: var(--azure-light) transparent;
}
.scroll-track::-webkit-scrollbar { height: 8px; }
.scroll-track::-webkit-scrollbar-thumb { background-color: var(--azure-light); border-radius: 999px; }
.scroll-track::-webkit-scrollbar-track { background-color: var(--azure-tint); }
.cap-panel {
  scroll-snap-align: start;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 30px 26px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.cap-panel:hover { transform: translateY(-6px); border-color: var(--azure-light); box-shadow: 0 20px 40px -30px #0369A1; }
.cap-icon { width: 34px; height: 34px; color: var(--azure); margin-bottom: 18px; }
.cap-panel h3 { font-size: 19px; margin-bottom: 10px; }
.cap-panel p { font-size: 15px; color: var(--muted); }

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.compare-section { background-color: var(--paper); padding: 96px 0; }
.compare-table { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background-color: #FFFFFF; }
.compare-head { display: grid; grid-template-columns: 0.9fr 1fr 1fr; background-color: var(--navy); }
.compare-col-label { padding: 16px 22px; font-weight: 600; color: var(--muted); }
.compare-col { padding: 16px 22px; font-weight: 600; color: #E6EDF6; }
.compare-col-zre { background-color: var(--azure-dark); color: #FFFFFF; }
.compare-row { display: grid; grid-template-columns: 0.9fr 1fr 1fr; border-top: 1px solid var(--line); }
.compare-row .compare-col-label { font-weight: 600; color: var(--ink-soft); }
.compare-row .compare-col { font-weight: 400; color: var(--muted); }
.compare-row .compare-col-zre { background-color: var(--azure-pale); color: var(--ink); font-weight: 500; }
.compare-head .compare-col-label { color: #AEC3DC; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-section { background-color: #FFFFFF; padding: 96px 0; border-top: 1px solid var(--line); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-list { list-style: none; margin-top: 32px; display: flex; flex-direction: column; gap: 20px; }
.contact-list li { display: flex; align-items: baseline; gap: 14px; }
.contact-tag { font-family: var(--font-display); font-weight: 600; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--azure-dark); min-width: 64px; }
.contact-list a, .contact-list span { color: var(--ink); font-size: 16px; }
.contact-list a:hover { color: var(--azure-dark); }
.contact-form { background-color: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 32px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: block; font-size: 14px; font-weight: 600; color: var(--ink-soft); margin-bottom: 16px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  margin-top: 7px;
  padding: 13px 14px;
  font-size: 15px;
  font-family: var(--font-body);
  color: var(--ink);
  background-color: #FFFFFF;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--azure); box-shadow: 0 0 0 3px var(--azure-pale); }
.form-note { margin-top: 14px; font-size: 14px; color: var(--azure-dark); min-height: 20px; }

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band { background: linear-gradient(120deg, var(--azure-dark) 0%, var(--azure) 100%); padding: 72px 0; }
.cta-inner { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.cta-copy h2 { color: #FFFFFF; font-size: 34px; margin-bottom: 14px; }
.cta-copy p { color: #E9F5FC; font-size: 17px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: flex-end; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background-color: var(--navy); color: #E6EDF6; border-top: 3px solid var(--azure); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 44px; padding-top: 60px; padding-bottom: 44px; }
.footer-brand .brand-word { color: #FFFFFF; }
.footer-brand .compass-rose { color: var(--azure-light); }
.footer-blurb { margin-top: 16px; font-size: 15px; color: #AEC3DC; max-width: 300px; }
.footer-col h3 { color: #FFFFFF; font-size: 15px; margin-bottom: 18px; letter-spacing: 0.04em; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col a, .footer-address { font-size: 15px; color: #AEC3DC; line-height: 1.6; }
.footer-col a:hover { color: var(--azure-light); }
.footer-address { font-style: normal; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--navy-soft); padding-top: 24px; padding-bottom: 32px; font-size: 14px; color: #8FA5BE; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1020px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .radar-screen { max-width: 340px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .cta-inner { grid-template-columns: 1fr; }
  .cta-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav-inner { gap: 12px; }
  .nav-mobile {
    display: none;
    flex-direction: column;
    padding: 8px 24px 24px;
    border-top: 1px solid var(--line);
    background-color: #FFFFFF;
  }
  .nav-mobile a { padding: 13px 0; font-size: 16px; font-weight: 500; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
  .nav-mobile .mobile-cta { color: #FFFFFF; background-color: var(--azure); border: 0; text-align: center; border-radius: 8px; margin-top: 14px; }
  .compass-nav.open .nav-mobile { display: flex; }
  .compass-nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .compass-nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
  .compass-nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero-copy h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .statement-text { font-size: 24px; }
  .section-title { font-size: 28px; }
  .section-head-row { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 36px 20px; }
  .stat-num { font-size: 40px; }
  .field-row { grid-template-columns: 1fr; }
  .compare-head, .compare-row { grid-template-columns: 1fr 1fr 1fr; }
  .compare-col-label, .compare-col { padding: 12px 14px; font-size: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 6px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .process-list::before { left: 26px; }
  .step-num { width: 56px; height: 56px; font-size: 17px; }
  .process-step { gap: 20px; }
  .scroll-track { grid-auto-columns: 260px; }
}