/* =========================================================
   Ozoratec — shared stylesheet
   Clinical-systems identity: deep navy ink + antique-gold signal
   Display: Sora  |  Body: IBM Plex Sans  |  Data: IBM Plex Mono
   ========================================================= */

:root {
  /* palette */
  --ink:        #0A0E1A;
  --ink-2:      #101A2E;
  --ink-3:      #16233D;
  --paper:      #F6F5F1;
  --surface:    #FFFFFF;
  --signal:     #C9992F;
  --signal-dk:  #A97F22;
  --signal-br:  #E8C468;
  --line:       #E4DFD3;
  --line-dk:    rgba(255,255,255,.10);
  --text:       #10131C;
  --muted:      #5B5A52;
  --muted-dk:   #B7AE99;

  /* type */
  --f-display: 'Sora', system-ui, sans-serif;
  --f-body:    'IBM Plex Sans', system-ui, sans-serif;
  --f-mono:    'IBM Plex Mono', ui-monospace, monospace;

  /* layout */
  --maxw: 1180px;
  --pad: clamp(20px, 5vw, 56px);
  --radius: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--f-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
}

p { margin: 0; }

.wrap {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* utility eyebrow / mono labels ------------------------------------ */
.eyebrow {
  font-family: var(--f-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--signal-dk);
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--signal);
}
.on-dark .eyebrow { color: var(--signal-br); }

/* buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: .95rem;
  padding: .82rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
}
.btn-primary {
  background: var(--signal);
  color: #241905;
  box-shadow: 0 10px 28px -12px rgba(201,153,47,.55);
}
.btn-primary:hover { background: var(--signal-br); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: #fff(--text);
}
.btn-ghost:hover { border-color: var(--signal); color: var(--signal-dk); transform: translateY(-2px); }
.on-dark .btn-ghost { border-color: var(--line-dk); color: #F2EFE6; }
.on-dark .btn-ghost:hover { border-color: var(--signal-br); color: var(--signal-br); }
.btn .arw { transition: transform .18s ease; }
.btn:hover .arw { transform: translateX(3px); }

/* ===== header ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10,14,26,.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dk);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.22rem;
  letter-spacing: -.02em;
  color: #F5F2E9;
}
.brand .mark { width: 30px; height: 30px; flex: none; }
.brand b { color: var(--signal-br); font-weight: 600; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  font-size: .93rem;
  color: #C7C0A8;
  font-weight: 500;
  position: relative;
  padding: .2rem 0;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: var(--signal-br); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 2px; background: var(--signal-br); border-radius: 2px;
}
.nav-links a.btn-primary { display: none; }
.nav-cta { display: inline-flex; align-items: center; gap: 1.1rem; }
.nav-toggle {
  display: none;
  background: none; border: 0; cursor: pointer;
  width: 42px; height: 42px; color: #F2EFE6;
}
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 68px 0 auto 0;
    flex-direction: column; align-items: flex-start;
    gap: 0;
    background: var(--ink);
    border-bottom: 1px solid var(--line-dk);
    padding: .5rem var(--pad) 1.4rem;
    transform: translateY(-140%);
    transition: transform .32s cubic-bezier(.4,0,.2,1);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { width: 100%; padding: .95rem 0; border-bottom: 1px solid var(--line-dk); font-size: 1.05rem; }
  .nav-links a.btn-primary {
    display: inline-flex;
    width: auto;
    margin-top: .9rem;
    padding: .82rem 1.4rem;
    border-radius: 999px;
    border-bottom: none;
  }
  .nav-cta .btn-primary { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* ===== hero ====================================================== */
.hero {
  position: relative;
  background: radial-gradient(1200px 600px at 78% -10%, rgba(201,153,47,.16) 0%, transparent 60%),
              linear-gradient(180deg, var(--ink) 0%, #05070D 100%);
  color: #F2EFE6;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; padding-top: clamp(56px, 9vw, 104px); padding-bottom: clamp(64px, 10vw, 120px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.35rem, 5.4vw, 4rem);
  letter-spacing: -.03em;
  margin-top: 1.2rem;
}
.hero h1 em { font-style: normal; color: var(--signal-br); }
.hero-sub {
  margin-top: 1.35rem;
  font-size: clamp(1.02rem, 1.7vw, 1.2rem);
  color: #C8C2AC;
  max-width: 33ch;
}
.hero-actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: .8rem; }
.hero-stats {
  margin-top: 2.6rem;
  display: flex; gap: clamp(1.4rem, 4vw, 2.8rem);
  flex-wrap: wrap;
  border-top: 1px solid var(--line-dk);
  padding-top: 1.4rem;
}
.hero-stats .stat b {
  font-family: var(--f-display);
  font-size: 1.7rem; font-weight: 600;
  display: block; color: #fff; letter-spacing: -.02em;
}
.hero-stats .stat span { font-size: .82rem; color: var(--muted-dk); }

/* monitor card / signature */
.monitor {
  background: linear-gradient(180deg, #121A2C 0%, #0D1220 100%);
  border: 1px solid rgba(232,196,104,.2);
  border-radius: 20px;
  padding: 1.1rem 1.2rem 1.4rem;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.7);
}
.monitor-top {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--f-mono); font-size: .7rem; letter-spacing: .12em;
  color: var(--muted-dk); text-transform: uppercase;
}
.monitor-top .live { display: inline-flex; align-items: center; gap: .4rem; color: var(--signal-br); }
.monitor-top .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal-br); box-shadow: 0 0 0 0 rgba(232,196,104,.6); animation: pulse-dot 1.8s infinite; }
@keyframes pulse-dot { 0%{box-shadow:0 0 0 0 rgba(232,196,104,.55)} 70%{box-shadow:0 0 0 8px rgba(232,196,104,0)} 100%{box-shadow:0 0 0 0 rgba(232,196,104,0)} }
.ecg { width: 100%; height: 96px; margin: .7rem 0 1rem; display: block; }
.ecg path {
  fill: none; stroke: var(--signal-br); stroke-width: 2.4;
  stroke-linecap: round; stroke-linejoin: round;
  filter: drop-shadow(0 0 6px rgba(232,196,104,.5));
  stroke-dasharray: 1200; stroke-dashoffset: 1200;
  animation: trace 3.6s cubic-bezier(.5,0,.3,1) infinite;
}
@keyframes trace { 0%{stroke-dashoffset:1200} 55%{stroke-dashoffset:0} 100%{stroke-dashoffset:-1200} }
.monitor-readouts { display: grid; grid-template-columns: repeat(3,1fr); gap: .6rem; }
.readout {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 10px; padding: .6rem .7rem;
}
.readout .k { font-family: var(--f-mono); font-size: .62rem; color: var(--muted-dk); letter-spacing: .1em; text-transform: uppercase; }
.readout .v { font-family: var(--f-display); font-size: 1.28rem; color: #fff; font-weight: 600; }
.readout .v small { font-size: .7rem; color: var(--signal-br); font-weight: 500; }

@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; }
  .monitor { order: -1; }
}

/* ===== generic section =========================================== */
.section { padding-block: clamp(60px, 9vw, 112px); }
.section-head { max-width: 62ch; margin-bottom: clamp(30px, 5vw, 54px); }
.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.75rem); margin-top: 1rem; letter-spacing: -.03em; }
.section-head p { margin-top: 1rem; color: var(--muted); font-size: 1.08rem; }
.on-dark { background: var(--ink); color: #EDEAE0; }
.on-dark h2 { color: #fff; }
.on-dark .section-head p { color: var(--muted-dk); }

/* feature cards ---------------------------------------------------- */
.grid { display: grid; gap: 1.15rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px){ .grid-3 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 26px 50px -30px rgba(10,14,26,.4); border-color: #DCCEA0; }
.card .ico {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(201,153,47,.12); color: var(--signal-dk);
  margin-bottom: 1.1rem;
}
.card .ico svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.18rem; margin-bottom: .5rem; }
.card p { color: var(--muted); font-size: .96rem; }

/* value strip (dark inline stats) --------------------------------- */
.metrics {
  display: grid; grid-template-columns: repeat(4,1fr);
  gap: 1px; background: var(--line-dk);
  border: 1px solid var(--line-dk); border-radius: var(--radius);
  overflow: hidden;
}
.metrics .m { background: var(--ink-2); padding: 1.6rem 1.4rem; }
.metrics .m b { font-family: var(--f-display); font-size: 2rem; color: var(--signal-br); display: block; letter-spacing: -.02em; }
.metrics .m span { font-size: .86rem; color: var(--muted-dk); }
@media (max-width: 760px){ .metrics { grid-template-columns: repeat(2,1fr); } }

/* ===== product / module catalog ================================== */
.cluster { margin-top: clamp(34px, 5vw, 56px); }
.cluster-head {
  display: flex; align-items: baseline; gap: 1rem;
  padding-bottom: 1rem; margin-bottom: 1.4rem;
  border-bottom: 1px solid var(--line);
}
.cluster-head .idx { font-family: var(--f-mono); color: var(--signal-dk); font-size: .8rem; letter-spacing: .1em; }
.cluster-head h3 { font-size: 1.4rem; }
.cluster-head p { color: var(--muted); font-size: .94rem; margin-left: auto; max-width: 40ch; text-align: right; }
@media (max-width: 680px){ .cluster-head { flex-wrap: wrap; } .cluster-head p { margin-left: 0; text-align: left; width: 100%; } }

.modgrid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
@media (max-width: 900px){ .modgrid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .modgrid { grid-template-columns: 1fr; } }
.module {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.25rem;
  position: relative;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.module:hover { transform: translateY(-3px); border-color: var(--signal); box-shadow: 0 20px 40px -28px rgba(10,14,26,.45); }
.module .code {
  font-family: var(--f-mono); font-size: .68rem; letter-spacing: .12em;
  color: var(--signal-dk); background: rgba(201,153,47,.1);
  padding: .18rem .5rem; border-radius: 6px; display: inline-block;
}
.module h4 { font-family: var(--f-display); font-size: 1.04rem; margin: .7rem 0 .35rem; letter-spacing: -.01em; }
.module p { font-size: .87rem; color: var(--muted); line-height: 1.5; }

/* ===== process / steps =========================================== */
.steps { counter-reset: step; display: grid; gap: 1.1rem; grid-template-columns: repeat(4,1fr); }
@media (max-width: 900px){ .steps { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 520px){ .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--ink-2); border: 1px solid var(--line-dk);
  border-radius: var(--radius); padding: 1.6rem 1.3rem;
  position: relative;
}
.step .n { font-family: var(--f-mono); font-size: .78rem; color: var(--signal-br); letter-spacing: .1em; }
.step h4 { color: #fff; font-size: 1.12rem; margin: .7rem 0 .5rem; }
.step p { color: var(--muted-dk); font-size: .92rem; }

/* ===== split / about ============================================= */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px,5vw,64px); align-items: center; }
@media (max-width: 820px){ .split { grid-template-columns: 1fr; } }
.split .lead { font-size: 1.15rem; color: var(--text); }
.list-check { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: .85rem; }
.list-check li { display: flex; gap: .7rem; align-items: flex-start; font-size: .98rem; color: var(--muted); }
.list-check svg { width: 20px; height: 20px; flex: none; color: var(--signal); margin-top: 2px; }

.panel-dark {
  background: linear-gradient(160deg, var(--ink-2), var(--ink));
  border: 1px solid var(--line-dk);
  border-radius: 20px; padding: clamp(1.6rem, 3vw, 2.4rem);
  color: #EDE8D9;
}
.panel-dark h3 { color:#fff; font-size: 1.3rem; margin-bottom: 1rem; }
.mini-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 1.4rem; }
.mini-metrics b { font-family: var(--f-display); font-size: 1.9rem; color: var(--signal-br); display: block; }
.mini-metrics span { font-size: .82rem; color: var(--muted-dk); }

/* value cards (about) */
.values { display:grid; grid-template-columns: repeat(3,1fr); gap:1.1rem; }
@media (max-width: 820px){ .values { grid-template-columns: 1fr; } }
.value { border-left: 2px solid var(--signal); padding: .3rem 0 .3rem 1.2rem; }
.value h4 { font-size: 1.1rem; margin-bottom: .4rem; }
.value p { color: var(--muted); font-size: .95rem; }

/* ===== CTA band ================================================== */
.cta-band {
  background: radial-gradient(900px 400px at 20% 0%, rgba(201,153,47,.28) 0%, transparent 60%), var(--ink);
  color: #fff; text-align: center;
  border-radius: 24px;
  padding: clamp(2.6rem, 6vw, 4.4rem) var(--pad);
  position: relative; overflow: hidden;
}
.cta-band h2 { font-size: clamp(1.8rem,4vw,2.8rem); }
.cta-band p { color: var(--muted-dk); margin: 1rem auto 1.8rem; max-width: 52ch; }
.cta-actions { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

/* ===== footer =================================================== */
.site-footer { background: var(--ink); color: #B8B096; padding-block: clamp(48px,7vw,80px) 2rem; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; }
@media (max-width: 820px){ .foot-grid { grid-template-columns: 1fr 1fr; gap: 1.8rem; } }
@media (max-width: 480px){ .foot-grid { grid-template-columns: 1fr; } }
.foot-brand p { color: var(--muted-dk); font-size: .95rem; margin-top: 1rem; max-width: 34ch; }
.foot-col h5 { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-dk); margin: 0 0 1rem; }
.foot-col a { display: block; color: #C7C0A8; font-size: .93rem; padding: .3rem 0; }
.foot-col a:hover { color: var(--signal-br); }
.foot-bottom {
  margin-top: 2.6rem; padding-top: 1.4rem;
  border-top: 1px solid var(--line-dk);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-size: .82rem; color: var(--muted-dk);
}

/* reveal on scroll ------------------------------------------------ */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){ .reveal { opacity:1; transform:none; } }

/* focus visibility ------------------------------------------------ */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--signal-br);
  outline-offset: 3px;
  border-radius: 4px;
}