:root {
  --bg: #0b1020;
  --bg-elev: rgba(15, 23, 42, 0.72);
  --card: rgba(248, 250, 252, 0.97);
  --card-soft: rgba(255, 255, 255, 0.92);
  --ink: #0f172a;
  --muted: #64748b;
  --line: rgba(148, 163, 184, 0.28);
  --teal: #14b8a6;
  --teal-bright: #2dd4bf;
  --teal-deep: #0f766e;
  --navy: #1e293b;
  --white: #f8fafc;
  --shadow: 0 24px 80px rgba(2, 6, 23, 0.45);
  --radius: 22px;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::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: 1.5;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: rgba(15, 23, 42, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}

.bg-photo {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(45, 212, 191, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(56, 189, 248, 0.12), transparent 50%),
    linear-gradient(145deg, #0b1220 0%, #111827 40%, #0f172a 100%);
  z-index: -2;
}

.bg-veil {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(2, 6, 23, 0.35), rgba(2, 6, 23, 0.75)),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2394a3b8' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  z-index: -1;
  pointer-events: none;
}

/* Top nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  backdrop-filter: blur(16px);
  background: rgba(15, 23, 42, 0.65);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--white);
  font-weight: 500;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0f766e, #2dd4bf);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.4), 0 0 20px rgba(45, 212, 191, 0.25);
}

.brand-text strong {
  font-weight: 700;
  color: var(--teal-bright);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-left: 0.5rem;
}

.nav-links a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--teal-bright);
}

.hq-pill {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.25);
  border: 1px solid rgba(45, 212, 191, 0.35);
  color: #99f6e4;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.hq-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 1.25rem;
  margin-top: 1rem;
  align-items: stretch;
}

.hero-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.5rem 1.6rem;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.65);
}

.hero-logo svg {
  width: 88px;
  height: 88px;
  border-radius: 18px;
  box-shadow: 0 12px 40px rgba(15, 118, 110, 0.35);
}

.eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.hero-copy h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.lede {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-bullets {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  color: var(--navy);
}

.hero-bullets li {
  margin: 0.25rem 0;
}

.hero-foot {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.pulse {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 0.4rem;
  border-radius: 50%;
  background: var(--teal);
}

.hq-panel {
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(15, 23, 42, 0.92), rgba(15, 118, 110, 0.35));
  border: 1px solid rgba(45, 212, 191, 0.28);
  color: #e2e8f0;
  box-shadow: var(--shadow);
}

.hq-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  color: #f0fdfa;
}

.hq-sub {
  margin: 0 0 1rem;
  color: #94a3b8;
  font-size: 0.92rem;
}

.hq-facts {
  display: grid;
  gap: 0.55rem;
  margin: 0 0 1rem;
}

.hq-facts div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.hq-facts dt {
  margin: 0;
  color: #64748b;
  font-weight: 500;
}

.hq-facts dd {
  margin: 0;
  color: #f1f5f9;
  font-weight: 500;
}

.hq-facts code {
  background: rgba(15, 23, 42, 0.55);
  color: #99f6e4;
}

.badge.live {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.18);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.35);
  font-size: 0.78rem;
  font-weight: 700;
}

.hq-dids {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.did {
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid rgba(148, 163, 184, 0.15);
  font-size: 0.88rem;
  color: #cbd5e1;
}

.did strong {
  color: var(--teal-bright);
  margin-right: 0.35rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}

/* Sections */
.section {
  margin-top: 3rem;
  padding: 1.75rem 0 0.5rem;
}

.section-alt .tile {
  background: var(--card-soft);
}

.section-head {
  margin-bottom: 1.25rem;
  max-width: 40rem;
}

.section-kicker {
  margin: 0 0 0.3rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-bright);
}

.section-head h2 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.4rem, 2.2vw, 1.75rem);
  color: #f8fafc;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: #94a3b8;
}

.grid {
  display: grid;
  gap: 0.9rem;
}

.grid.caps,
.grid.platform,
.grid.connections,
.grid.pbx-highlights {
  grid-template-columns: repeat(3, 1fr);
}

/* IP-PBX compare band — high contrast on dark page background */
.pbx-compare {
  margin-top: 1.25rem;
  padding: 1.5rem 1.5rem 1.6rem;
  border-radius: 18px;
  background: #f8fafc;
  border: 1px solid rgba(226, 232, 240, 0.95);
  box-shadow: 0 16px 48px rgba(2, 6, 23, 0.35);
  color: #0f172a;
}

.pbx-compare h3 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare-grid h4 {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #0f766e;
}

.compare-grid ul {
  margin: 0;
  padding-left: 1.15rem;
  color: #334155;
  font-size: 0.95rem;
  line-height: 1.55;
}

.compare-grid li {
  margin: 0.4rem 0;
}

.compare-grid li::marker {
  color: #14b8a6;
}

.tile {
  padding: 1.15rem 1.2rem;
  border-radius: 18px;
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: 0 10px 40px rgba(2, 6, 23, 0.2);
}

.tile h3 {
  margin: 0.35rem 0 0.35rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.tile p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.tile .icon {
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(145deg, #ecfdf5, #ccfbf1);
  color: var(--teal-deep);
  font-size: 1rem;
  border: 1px solid rgba(20, 184, 166, 0.2);
}

.tile.feature .tag {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #f0fdfa;
  color: var(--teal-deep);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(20, 184, 166, 0.25);
}

.status {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}

.status.now {
  background: #ecfdf5;
  color: #047857;
}

.status.next {
  background: #eff6ff;
  color: #1d4ed8;
}

.status.later {
  background: #f8fafc;
  color: #64748b;
}

/* Architecture diagram */
.arch {
  padding: 1.5rem 1.25rem 1.75rem;
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.18);
  backdrop-filter: blur(8px);
}

.arch-row {
  display: flex;
  justify-content: center;
}

.arch-box {
  text-align: center;
  padding: 0.85rem 1.1rem;
  border-radius: 14px;
  font-weight: 600;
  font-size: 0.92rem;
  color: #f8fafc;
  min-width: 12rem;
  border: 1px solid transparent;
}

.arch-box.wide {
  min-width: min(100%, 28rem);
}

.arch-box small {
  display: block;
  margin-top: 0.25rem;
  font-weight: 500;
  font-size: 0.78rem;
  opacity: 0.8;
}

.arch-box.carrier {
  background: linear-gradient(135deg, #1e3a5f, #0f766e);
  border-color: rgba(45, 212, 191, 0.35);
}

.arch-box.sbc {
  background: linear-gradient(135deg, #134e4a, #115e59);
  border-color: rgba(45, 212, 191, 0.45);
}

.arch-box.pbx {
  background: rgba(30, 58, 138, 0.55);
  border-color: rgba(147, 197, 253, 0.35);
}

.arch-box.ai {
  background: rgba(88, 28, 135, 0.45);
  border-color: rgba(216, 180, 254, 0.35);
}

.arch-box.end {
  background: rgba(15, 23, 42, 0.75);
  border-color: rgba(148, 163, 184, 0.25);
}

.arch-box.conn {
  background: rgba(15, 118, 110, 0.25);
  border-color: rgba(45, 212, 191, 0.3);
  font-size: 0.88rem;
}

.arch-arrow {
  text-align: center;
  color: #64748b;
  font-size: 0.8rem;
  font-family: var(--mono);
  padding: 0.45rem 0;
}

.arch-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  max-width: 36rem;
  margin: 0 auto;
}

.arch-split.three {
  grid-template-columns: 1fr 1fr 1fr;
  max-width: 42rem;
}

/* Telair */
.telair-card {
  padding: 1.5rem 1.6rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow);
}

.telair-card ol {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  color: var(--navy);
}

.telair-card li {
  margin: 0.45rem 0;
}

.telair-card blockquote {
  margin: 0;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--teal);
  background: #f0fdfa;
  border-radius: 0 12px 12px 0;
  color: var(--navy);
  font-size: 0.98rem;
}

/* Timeline */
.timeline {
  display: grid;
  gap: 0.85rem;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.step-n {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--teal-deep), var(--teal-bright));
  color: white;
  font-weight: 700;
  font-size: 0.9rem;
}

.step h3 {
  margin: 0 0 0.25rem;
  color: var(--ink);
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

/* Footer */
.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  color: #64748b;
  font-size: 0.88rem;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.footer strong {
  display: block;
  color: #e2e8f0;
  margin-bottom: 0.15rem;
}

.footer-links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* Responsive */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid.caps,
  .grid.platform,
  .grid.connections,
  .grid.pbx-highlights {
    grid-template-columns: 1fr 1fr;
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-card {
    grid-template-columns: 1fr;
  }

  .grid.caps,
  .grid.platform,
  .grid.connections,
  .grid.pbx-highlights,
  .arch-split,
  .arch-split.three {
    grid-template-columns: 1fr;
  }

  .hq-facts div {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }
}