/* ==========================================================================
   MERIDIAN SIGNAL — placeholder site
   Design tokens
   ========================================================================== */

:root{
  --bg: #0b0f14;
  --bg-elev: #10151d;
  --panel: #131924;
  --line: #212a38;
  --text: #e7e9ec;
  --text-dim: #8a94a6;
  --text-faint: #57606f;
  --accent: #c9a227;
  --accent-soft: rgba(201,162,39,.14);
  --accent-line: rgba(201,162,39,.35);

  --font-display: 'Space Grotesk', ui-sans-serif, sans-serif;
  --font-body: 'Inter', ui-sans-serif, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --sidebar-w: 232px;
  --maxw: 760px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before{
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1200px 500px at 85% -10%, rgba(201,162,39,.05), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

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

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 500;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.2em;
}
.eyebrow::before{
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Layout shell ---------- */

.shell{
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.sidebar{
  width: var(--sidebar-w);
  flex-shrink: 0;
  border-right: 1px solid var(--line);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.wordmark{
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: .02em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.wordmark .dot{ color: var(--accent); }

.sidebar nav{
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar nav a{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  padding: 9px 10px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color .15s ease, background .15s ease;
}
.sidebar nav a .idx{ color: var(--text-faint); }
.sidebar nav a:hover{ color: var(--text); background: var(--panel); }
.sidebar nav a[aria-current="page"]{
  color: var(--accent);
  background: var(--accent-soft);
}

.sidebar-pulse{ margin-top: auto; }
.sidebar-pulse .cap{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .08em;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
}
.sidebar-foot{
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  line-height: 1.7;
}

.topbar{
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(11,15,20,.9);
  backdrop-filter: blur(8px);
  z-index: 20;
}
.topbar .wordmark{ font-size: 15px; }
.menu-btn{
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 8px 12px;
  cursor: pointer;
}

.main{
  flex: 1;
  min-width: 0;
  padding: 72px 48px 100px;
}
.content{
  max-width: var(--maxw);
}

/* ---------- Pulse bars (signature element) ---------- */

.pulse-bars{
  display: flex;
  align-items: center;
  gap: 3px;
  height: var(--pb-h, 28px);
}
.pulse-bars .bar{
  flex: 1;
  width: 2px;
  border-radius: 1px;
  background: var(--accent);
  opacity: .85;
  transform-origin: center;
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse{
  0%, 100%{ transform: scaleY(var(--min, .25)); }
  50%{ transform: scaleY(var(--max, 1)); }
}
@media (prefers-reduced-motion: reduce){
  .pulse-bars .bar{ animation: none; transform: scaleY(.6); }
  html{ scroll-behavior: auto; }
}

.pulse-bars.hero-pulse{ --pb-h: 64px; gap: 4px; }
.pulse-bars.hero-pulse .bar{ width: 3px; }

/* ---------- Hero ---------- */

.hero{ padding-bottom: 56px; border-bottom: 1px solid var(--line); margin-bottom: 56px; }
.hero h1{
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  max-width: 14ch;
}
.hero p.lede{
  color: var(--text-dim);
  max-width: 46ch;
  font-size: 16.5px;
  margin: 18px 0 32px;
}
.hero .pulse-bars{ margin: 32px 0 8px; }
.hero .pulse-caption{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .06em;
}

/* ---------- Buttons ---------- */

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  padding: 12px 20px;
  border-radius: 7px;
  border: 1px solid var(--accent-line);
  color: var(--accent);
  background: var(--accent-soft);
  cursor: pointer;
  transition: background .15s ease, transform .1s ease;
}
.btn:hover{ background: rgba(201,162,39,.24); }
.btn:active{ transform: translateY(1px); }
.btn.ghost{
  border-color: var(--line);
  color: var(--text-dim);
  background: transparent;
}
.btn.ghost:hover{ border-color: var(--text-faint); color: var(--text); }

/* ---------- Section / cards ---------- */

section.block{ margin-bottom: 56px; }
section.block > h2{ font-size: 22px; }

.cards{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 24px;
}
.card{
  background: var(--bg-elev);
  padding: 22px 20px;
}
.card .tag{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.card h3{ font-size: 16.5px; margin: 10px 0 8px; }
.card p{ color: var(--text-dim); font-size: 14px; margin: 0; }

/* ---------- Ledger rows (status / services) ---------- */

.ledger{ border-top: 1px solid var(--line); margin-top: 22px; }
.ledger .row{
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.ledger .row .name{ font-size: 15px; }
.ledger .row .desc{ color: var(--text-dim); font-size: 13.5px; margin-top: 4px; }
.ledger .row .status{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--text-faint);
  white-space: nowrap;
  text-transform: uppercase;
}
.ledger .row .status.on{ color: var(--accent); }

/* ---------- Principles list ---------- */

.principles{ list-style: none; margin: 24px 0 0; padding: 0; }
.principles li{
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.principles li:last-child{ border-bottom: 1px solid var(--line); }
.principles .k{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .06em;
  padding-top: 3px;
}
.principles h3{ font-size: 15.5px; margin: 0 0 6px; }
.principles p{ color: var(--text-dim); font-size: 14px; margin: 0; }

/* ---------- Contact ---------- */

.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 8px;
}
.contact-info .row{ padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-info .row:first-child{ border-top: 1px solid var(--line); }
.contact-info .k{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.contact-info .v{ margin-top: 6px; font-size: 15px; }
.contact-info .v a:hover{ color: var(--accent); }

form.stub{ display: flex; flex-direction: column; gap: 14px; }
form.stub label{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}
form.stub input, form.stub textarea{
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 11px 13px;
  resize: vertical;
}
form.stub input:focus, form.stub textarea:focus{ outline: none; border-color: var(--accent-line); }
form.stub .note{
  font-size: 12.5px;
  color: var(--text-faint);
  margin-top: 2px;
}
.toast{
  display: none;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  padding: 10px 14px;
  border-radius: 7px;
}
.toast.show{ display: block; }

/* ---------- 404 ---------- */

.notfound{
  min-height: calc(100vh - 173px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.notfound .code{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
  letter-spacing: .1em;
}
.notfound h1{ font-size: clamp(30px, 5vw, 44px); margin: 10px 0 14px; }
.notfound p{ color: var(--text-dim); max-width: 42ch; margin-bottom: 28px; }

/* ---------- Footer ---------- */

footer.page-foot{
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: .04em;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px){
  .cards{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 780px){
  .sidebar{ display: none; }
  .topbar{ display: flex; }
  .main{ padding: 40px 22px 80px; }

  body.nav-open .mobile-nav{ display: flex; }
}

.mobile-nav{
  display: none;
  flex-direction: column;
  position: sticky;
  top: 61px;
  z-index: 19;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--line);
  padding: 8px 14px 14px;
}
.mobile-nav a{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a:last-child{ border-bottom: none; }
.mobile-nav a[aria-current="page"]{ color: var(--accent); }