/* ============================================
   O2 SYSTEMS LTD — DESIGN TOKENS
   ============================================ */
:root{
  --ink:        #0B0E14;
  --ink-soft:   #11151D;
  --panel:      #161B25;
  --panel-2:    #1C2230;
  --line:       #2A3142;
  --paper:      #F2F4F1;
  --paper-dim:  #B9C0CE;
  --mute:       #6B7385;
  --signal:     #3EE6C4;
  --signal-dim: #2AB89A;
  --amber:      #E8A33D;

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

  --radius: 10px;
  --container: 1180px;
}

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

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

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

::selection{ background: var(--signal); color: var(--ink); }

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

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

p{ margin: 0 0 1rem 0; color: var(--paper-dim); }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before{
  content:"";
  width: 7px; height: 7px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(62,230,196,0.18);
}

.mono{ font-family: var(--font-mono); }

/* ============================================
   BACKGROUND GRID TEXTURE
   ============================================ */
.grid-bg{
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.grid-bg::after{
  content:"";
  position:absolute; inset:0;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(62,230,196,0.10), transparent 60%);
}

/* ============================================
   LOGO MARK
   ============================================ */
.logo{
  display:flex;
  align-items:center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--paper);
  letter-spacing: -0.01em;
}
.logo-mark{
  width: 38px; height: 38px;
  flex-shrink: 0;
}
.logo-word b{ color: var(--signal); font-weight: 700; }
.logo-sub{
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--mute);
  text-transform: uppercase;
  display: block;
  margin-top: -2px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar{
  background: rgba(11,14,20,0.82);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}
.navbar .container{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 24px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap: 6px;
  list-style:none;
  margin:0; padding:0;
}
.nav-links a{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--paper-dim);
  padding: 9px 16px;
  border-radius: 6px;
  transition: color .2s ease, background .2s ease;
  text-transform: uppercase;
}
.nav-links a:hover{ color: var(--paper); background: var(--panel); }
.nav-links a.active{ color: var(--signal); background: rgba(62,230,196,0.08); }

.btn{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 11px 22px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:10px;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn-signal{
  background: var(--signal);
  color: var(--ink);
}
.btn-signal:hover{ background: #56ecd0; }
.btn-ghost{
  background: transparent;
  border-color: var(--line);
  color: var(--paper);
}
.btn-ghost:hover{ border-color: var(--signal); color: var(--signal); }

.navbar-toggler{
  border-color: var(--line) !important;
}
.navbar-toggler-icon{
  filter: invert(1);
}

/* ============================================
   HERO
   ============================================ */
.hero{
  padding: 110px 0 70px;
  position: relative;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 991px){
  .hero-grid{ grid-template-columns: 1fr; }
}
.hero h1{
  font-size: clamp(2.4rem, 4.6vw, 3.6rem);
  line-height: 1.08;
  margin-bottom: 22px;
}
.hero h1 em{
  font-style: normal;
  color: var(--signal);
}
.hero-lede{
  font-size: 1.1rem;
  max-width: 540px;
  color: var(--paper-dim);
}
.hero-actions{
  display:flex;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

/* Terminal signature element */
.terminal{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,0.6);
}
.terminal-bar{
  display:flex;
  align-items:center;
  gap:8px;
  padding: 12px 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}
.terminal-dot{ width:10px; height:10px; border-radius:50%; background: var(--line); }
.terminal-dot:nth-child(1){ background:#E8745C; }
.terminal-dot:nth-child(2){ background:#E8A33D; }
.terminal-dot:nth-child(3){ background:#3EE6C4; }
.terminal-title{
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--mute);
  letter-spacing: 0.05em;
}
.terminal-body{
  padding: 20px 20px 22px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
}
.term-row{
  display:flex;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px dashed var(--line);
  padding: 9px 0;
}
.term-row:last-child{ border-bottom: none; }
.term-code{ color: var(--paper-dim); }
.term-code b{ color: var(--paper); font-weight: 600; }
.term-status{
  color: var(--signal);
  display:flex; align-items:center; gap:7px;
  white-space: nowrap;
}
.term-status::before{
  content:"";
  width:6px; height:6px;
  border-radius:50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(62,230,196,0.15);
  animation: pulse 1.8s infinite ease-in-out;
}
@keyframes pulse{
  0%,100%{ opacity:1; }
  50%{ opacity:0.35; }
}
@media (prefers-reduced-motion: reduce){
  .term-status::before{ animation: none; }
}
.terminal-foot{
  border-top: 1px solid var(--line);
  padding: 13px 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--mute);
  display:flex;
  justify-content: space-between;
}

/* ============================================
   SECTION SCAFFOLDING
   ============================================ */
section{ padding: 90px 0; }
.section-tight{ padding: 60px 0; }
.section-head{
  max-width: 640px;
  margin-bottom: 50px;
}
.section-head h2{
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 14px;
}
.bordered-top{ border-top: 1px solid var(--line); }
.panel-bg{ background: var(--ink-soft); }

/* Cards */
.card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  height: 100%;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover{ border-color: var(--signal-dim); transform: translateY(-3px); }
.card-index{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mute);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  display:block;
}
.card h3{
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.card p{ margin-bottom: 0; font-size: 0.95rem; }

.icon-box{
  width: 46px; height: 46px;
  border-radius: 8px;
  background: rgba(62,230,196,0.10);
  border: 1px solid rgba(62,230,196,0.25);
  display:flex; align-items:center; justify-content:center;
  margin-bottom: 18px;
  color: var(--signal);
}
.icon-box svg{ width: 22px; height: 22px; }

/* Stat strip */
.stat-strip{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 767px){
  .stat-strip{ grid-template-columns: repeat(2, 1fr); }
}
.stat-cell{
  padding: 28px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.stat-cell:last-child{ border-right: none; }
.stat-num{
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--signal);
  font-weight: 700;
  line-height:1;
  margin-bottom: 6px;
}
.stat-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
}

/* SIC code chips */
.sic-row{
  display:flex;
  align-items:flex-start;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.sic-row:last-child{ border-bottom: none; }
.sic-code{
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--signal);
  font-weight: 600;
  min-width: 110px;
  flex-shrink: 0;
}
.sic-text h4{
  font-size: 1.05rem;
  margin-bottom: 4px;
}
.sic-text p{ margin-bottom: 0; font-size: 0.92rem; }

/* Process list (numbered, real sequence) */
.process-step{
  display:flex;
  gap: 22px;
  padding-bottom: 36px;
  position: relative;
}
.process-step::before{
  content:"";
  position:absolute;
  left: 23px; top: 50px; bottom: 0;
  width: 1px;
  background: var(--line);
}
.process-step:last-child::before{ display:none; }
.process-step:last-child{ padding-bottom: 0; }
.process-num{
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid var(--signal-dim);
  background: var(--ink-soft);
  color: var(--signal);
  font-family: var(--font-mono);
  font-weight: 600;
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0;
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
}
.process-text h4{ margin-bottom: 6px; font-size: 1.1rem; }
.process-text p{ margin-bottom:0; }

/* Quote / CTA band */
.cta-band{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 56px;
  text-align: center;
  position: relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background: radial-gradient(circle at 50% 0%, rgba(62,230,196,0.14), transparent 60%);
}
.cta-band h2{ margin-bottom: 14px; position:relative; }
.cta-band p{ max-width: 500px; margin: 0 auto 28px; position:relative; }
.cta-band .hero-actions{ justify-content:center; position:relative; }

/* Footer */
footer{
  border-top: 1px solid var(--line);
  padding: 56px 0 28px;
  background: var(--ink-soft);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 767px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
.footer-col h5{
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 16px;
}
.footer-col p{ font-size: 0.9rem; margin-bottom: 14px; }
.footer-col ul{ list-style:none; padding:0; margin:0; }
.footer-col ul li{ margin-bottom: 10px; }
.footer-col a{
  font-size: 0.9rem;
  color: var(--paper-dim);
  transition: color .2s ease;
}
.footer-col a:hover{ color: var(--signal); }
.footer-bottom{
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display:flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mute);
}

/* Page header (about/services/contact) */
.page-header{
  padding: 130px 0 56px;
  border-bottom: 1px solid var(--line);
}
.page-header h1{
  font-size: clamp(2rem, 4vw, 2.8rem);
}
.breadcrumb-mono{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mute);
  margin-bottom: 18px;
}
.breadcrumb-mono .sep{ margin: 0 8px; color: var(--line); }
.breadcrumb-mono .current{ color: var(--signal); }

/* Forms */
.form-control-dark{
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--paper);
  border-radius: 8px;
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  width: 100%;
}
.form-control-dark:focus{
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(62,230,196,0.12);
}
.form-control-dark::placeholder{ color: var(--mute); }
label.form-label-dark{
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: 8px;
  display: block;
}

.contact-info-row{
  display:flex;
  gap:16px;
  align-items:flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-info-row:last-child{ border-bottom:none; }
.contact-info-row .icon-box{ margin-bottom:0; }
.contact-info-row h4{ font-size: 1rem; margin-bottom: 4px; }
.contact-info-row p{ margin-bottom:0; font-size: 0.92rem; }

.map-frame{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  filter: grayscale(0.4) invert(0.92) contrast(0.92);
}

/* Team/value cards on about */
.value-list .sic-code{ min-width: 56px; font-size: 1.1rem; }

/* Misc helpers */
.text-signal{ color: var(--signal) !important; }
.text-mute{ color: var(--mute) !important; }
.fade-up{
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp .7s ease forwards;
}
@keyframes fadeUp{ to{ opacity:1; transform:none; } }
@media (prefers-reduced-motion: reduce){
  .fade-up{ animation: none; opacity:1; transform:none; }
}
.delay-1{ animation-delay: .08s; }
.delay-2{ animation-delay: .16s; }
.delay-3{ animation-delay: .24s; }