/* ==========================================================================
   OHM — Design tokens
   Palette : Ink (marine), Steel (bleu ardoise), Slate (texte secondaire),
   Mist (fond clair), Copper (accent — clin d'œil aux pistes de circuit
   imprimé et au nom OHM).
   Type : Space Grotesk (display), Inter (texte), JetBrains Mono (data/labels)
   ========================================================================== */

:root{
  --ink: #0B1E33;
  --ink-soft: #122744;
  --steel: #1C3A56;
  --steel-soft: #24486a;
  --slate: #5A6B7D;
  --slate-light: #8695a4;
  --mist: #F2F4F7;
  --mist-warm: #ECEFF3;
  --white: #FFFFFF;
  --copper: #BD6B4C;
  --copper-glow: #E08E68;
  --copper-dim: #8f5138;
  --line: #DCE1E8;
  --line-dark: rgba(255,255,255,0.12);

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;

  --max-w: 1180px;
  --radius: 3px;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

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

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

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

h1, h2, h3, h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}

h1{ font-size: clamp(2.4rem, 4.4vw, 3.6rem); }
h2{ font-size: clamp(1.7rem, 2.8vw, 2.3rem); }
h3{ font-size: 1.25rem; }

p{ margin: 0 0 1em 0; color: var(--slate); }

.container{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before{
  content: "";
  width: 18px;
  height: 1px;
  background: var(--copper);
  display: inline-block;
}

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  padding: 13px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .18s ease;
  white-space: nowrap;
}
.btn-primary{
  background: var(--copper);
  color: var(--white);
}
.btn-primary:hover{ background: var(--copper-glow); transform: translateY(-1px); }
.btn-outline{
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-outline:hover{ border-color: var(--copper); color: var(--copper); }
.btn-outline-light{
  background: transparent;
  border-color: var(--line-dark);
  color: var(--white);
}
.btn-outline-light:hover{ border-color: var(--copper-glow); color: var(--copper-glow); }

/* ---------- Header / nav ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,30,51,0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line-dark);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  color: var(--white);
}
.logo{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo .mark{
  width: 9px; height: 9px;
  background: var(--copper);
  display: inline-block;
  border-radius: 1px;
}
.nav-links{
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a{
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  transition: color .15s ease;
}
.nav-links a:hover, .nav-links a.active{ color: var(--white); }
.nav-cta{ display: flex; align-items: center; gap: 14px; }
.nav-toggle{
  display: none;
  background: none; border: none; color: var(--white);
  font-size: 1.4rem; cursor: pointer;
}

@media (max-width: 860px){
  .nav-links{
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--ink);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 32px 20px;
    display: none;
    border-bottom: 1px solid var(--line-dark);
  }
  .nav-links.open{ display: flex; }
  .nav-links li{ width: 100%; padding: 12px 0; border-bottom: 1px solid var(--line-dark); }
  .nav-cta .btn-outline-light{ display: none; }
  .nav-toggle{ display: block; }
}

/* ---------- Hero ---------- */
.hero{
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-soft) 100%);
  color: var(--white);
  padding: 96px 0 70px;
  overflow: hidden;
  position: relative;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}
.hero h1{ color: var(--white); }
.hero .lead{
  color: rgba(255,255,255,0.68);
  font-size: 1.08rem;
  max-width: 46ch;
  margin-bottom: 32px;
}
.hero-actions{ display: flex; gap: 14px; flex-wrap: wrap; }

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

/* Circuit trace signature graphic */
.circuit-wrap{ position: relative; }
.circuit-wrap svg{ width: 100%; height: auto; overflow: visible; }
.trace{
  fill: none;
  stroke: var(--slate-light);
  stroke-width: 1.4;
  opacity: 0.55;
}
.trace-pulse{
  fill: none;
  stroke: var(--copper);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 10 220;
  animation: dash 3.6s linear infinite;
  filter: drop-shadow(0 0 4px rgba(189,107,76,0.7));
}
.trace-pulse.d2{ animation-delay: .6s; }
.trace-pulse.d3{ animation-delay: 1.2s; }
.trace-pulse.d4{ animation-delay: 1.8s; }
@keyframes dash{
  0%{ stroke-dashoffset: 0; }
  100%{ stroke-dashoffset: -460; }
}
.node{ fill: var(--steel); stroke: var(--line-dark); stroke-width: 1; }
.node-core{ fill: var(--ink); stroke: var(--copper); stroke-width: 1.6; }
.node-label{
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: rgba(255,255,255,0.72);
  letter-spacing: 0.04em;
}
.node-core-label{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  fill: var(--white);
}

@media (prefers-reduced-motion: reduce){
  .trace-pulse{ animation: none; opacity: 0.85; stroke-dasharray: none; }
}

/* ---------- Stats strip ---------- */
.stats{
  background: var(--steel);
  color: var(--white);
}
.stats-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 38px 0;
}
.stat-num{
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--copper-glow);
  font-weight: 700;
  margin-bottom: 4px;
}
.stat-label{
  font-size: 0.82rem;
  color: rgba(255,255,255,0.68);
  line-height: 1.4;
}
@media (max-width: 760px){
  .stats-grid{ grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Sections ---------- */
section{ padding: 88px 0; }
.section-head{
  max-width: 640px;
  margin-bottom: 52px;
}
.section-head.center{ margin-left: auto; margin-right: auto; text-align: center; }

.section-alt{ background: var(--white); }
.section-dark{ background: var(--ink); color: var(--white); }
.section-dark p{ color: rgba(255,255,255,0.65); }
.section-dark h2, .section-dark h3{ color: var(--white); }

/* Steps (real sequence -> numbered) */
.steps{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.steps::before{
  content: "";
  position: absolute;
  top: 22px; left: 6%; right: 6%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--copper) 0 6px, transparent 6px 12px);
}
.step{ padding: 0 20px 0 0; position: relative; }
.step-num{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--white);
  background: var(--copper);
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  position: relative; z-index: 1;
}
.step h3{ font-size: 1.05rem; margin-bottom: 8px; }
.step p{ font-size: 0.92rem; }
@media (max-width: 900px){
  .steps{ grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .steps::before{ display: none; }
}
@media (max-width: 560px){ .steps{ grid-template-columns: 1fr; } }

/* Cards grid (solutions) */
.card-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover{ border-color: var(--copper); transform: translateY(-3px); }
.card-tag{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--copper);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: block;
}
.card h3{ margin-bottom: 10px; }
.card p{ font-size: 0.92rem; margin-bottom: 0; }
@media (max-width: 980px){ .card-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .card-grid{ grid-template-columns: 1fr; } }

/* Principles / why */
.principles{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.principle{ border-left: 2px solid var(--copper); padding-left: 20px; }
@media (max-width: 760px){ .principles{ grid-template-columns: 1fr; } }

/* Integrations tag grid */
.tag-grid{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tag{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border: 1px solid var(--line);
  padding: 10px 16px;
  border-radius: var(--radius);
  color: var(--steel);
  background: var(--white);
}

/* CTA band */
.cta-band{
  background: var(--ink);
  color: var(--white);
  padding: 64px 0;
  text-align: center;
}
.cta-band h2{ color: var(--white); margin-bottom: 14px; }
.cta-band p{ color: rgba(255,255,255,0.66); max-width: 50ch; margin: 0 auto 30px; }
.cta-actions{ display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Table / feature list */
.feature-list{ display: grid; gap: 0; border-top: 1px solid var(--line); }
.feature-row{
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.feature-row .label{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--copper);
  letter-spacing: 0.03em;
}
@media (max-width: 700px){
  .feature-row{ grid-template-columns: 1fr; gap: 6px; }
}

/* Breadcrumb / page hero (interior pages) */
.page-hero{
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-soft) 100%);
  color: var(--white);
  padding: 64px 0 56px;
}
.page-hero .lead{ color: rgba(255,255,255,0.68); max-width: 60ch; }

/* Contact */
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
@media (max-width: 860px){ .contact-grid{ grid-template-columns: 1fr; } }

.form-field{ margin-bottom: 20px; }
.form-field label{
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 8px;
}
.form-field input, .form-field select, .form-field textarea{
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--white);
  color: var(--ink);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus{
  outline: 2px solid var(--copper);
  outline-offset: 1px;
  border-color: var(--copper);
}
.form-field textarea{ resize: vertical; min-height: 120px; }

.info-block{ margin-bottom: 30px; }
.info-block .label{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--copper);
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

/* Footer */
.site-footer{
  background: var(--ink);
  color: rgba(255,255,255,0.6);
  padding: 56px 0 28px;
  border-top: 1px solid var(--line-dark);
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-grid h4{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-grid ul{ list-style: none; margin: 0; padding: 0; }
.footer-grid li{ margin-bottom: 10px; }
.footer-grid a{ color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-grid a:hover{ color: var(--copper-glow); }
.footer-bottom{
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--line-dark);
  padding-top: 22px;
  font-size: 0.8rem;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom .logo{ font-size: 0.9rem; }
@media (max-width: 760px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}

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

/* ==========================================================================
   Support portal — additions
   ========================================================================== */

.subnav{
  background: var(--ink-soft);
  border-bottom: 1px solid var(--line-dark);
}
.subnav-inner{
  display: flex;
  align-items: center;
  gap: 28px;
  height: 48px;
  overflow-x: auto;
}
.subnav a{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: rgba(255,255,255,0.6);
  white-space: nowrap;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.subnav a:hover{ color: var(--white); }
.subnav a.active{ color: var(--copper-glow); border-bottom-color: var(--copper); }

/* Search */
.search-bar{
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 15px 18px;
  max-width: 560px;
}
.search-bar input{
  flex: 1;
  background: transparent;
  border: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.98rem;
}
.search-bar input::placeholder{ color: rgba(255,255,255,0.45); }
.search-bar input:focus{ outline: none; }
.search-bar .icon{ color: var(--copper-glow); font-family: var(--font-mono); }

.search-bar-light{
  background: var(--white);
  border: 1px solid var(--line);
}
.search-bar-light input{ color: var(--ink); }
.search-bar-light input::placeholder{ color: var(--slate-light); }

/* Category grid */
.category-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.category-card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .15s ease, transform .15s ease;
}
.category-card:hover{ border-color: var(--copper); transform: translateY(-2px); }
.category-icon{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--copper);
  border: 1px solid var(--copper);
  width: 34px; height: 34px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.category-card h3{ font-size: 1.02rem; margin-bottom: 6px; }
.category-count{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--slate-light);
}
@media (max-width: 980px){ .category-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .category-grid{ grid-template-columns: 1fr; } }

/* Article list */
.article-list{ border-top: 1px solid var(--line); }
.article-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.article-row:hover .article-title{ color: var(--copper); }
.article-title{ font-family: var(--font-display); font-weight: 600; font-size: 1rem; transition: color .15s ease; }
.article-meta{
  display: flex; align-items: center; gap: 14px;
  flex-shrink: 0;
}
.article-tag{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--steel);
  background: var(--mist-warm);
  padding: 5px 10px;
  border-radius: var(--radius);
}
.article-date{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--slate-light);
}

/* Popular articles on hub */
.popular-list{ display: grid; gap: 0; }
.popular-item{
  display: flex; align-items: baseline; gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.popular-item .num{
  font-family: var(--font-mono);
  color: var(--copper);
  font-size: 0.82rem;
  flex-shrink: 0;
}

/* Article / KB detail layout */
.kb-layout{
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 56px;
}
@media (max-width: 900px){ .kb-layout{ grid-template-columns: 1fr; } }

.kb-article h2{ margin-top: 1.6em; font-size: 1.35rem; }
.kb-article h2:first-child{ margin-top: 0; }
.kb-article p{ color: var(--ink); opacity: 0.85; }
.kb-article ul, .kb-article ol{ color: var(--slate); padding-left: 1.2em; }
.kb-article li{ margin-bottom: 0.5em; }
.kb-article code{
  font-family: var(--font-mono);
  background: var(--mist-warm);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.88em;
  color: var(--steel);
}
.kb-article pre{
  background: var(--ink);
  color: #d7e0ea;
  padding: 18px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.55;
  margin: 1.2em 0;
}
.kb-note{
  border-left: 2px solid var(--copper);
  background: var(--mist-warm);
  padding: 14px 18px;
  font-size: 0.9rem;
  color: var(--steel);
  margin: 1.4em 0;
}

.kb-sidebar{ font-size: 0.88rem; }
.kb-sidebar .label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate-light);
  margin-bottom: 10px;
  display: block;
}
.kb-sidebar-block{ margin-bottom: 30px; }
.kb-toc{ list-style: none; margin: 0; padding: 0; }
.kb-toc li{ margin-bottom: 9px; }
.kb-toc a{ color: var(--slate); border-bottom: 1px dotted transparent; }
.kb-toc a:hover{ color: var(--copper); border-bottom-color: var(--copper); }

.breadcrumb{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 18px;
}
.breadcrumb a{ color: rgba(255,255,255,0.75); }
.breadcrumb a:hover{ color: var(--copper-glow); }
.breadcrumb-light{ color: var(--slate-light); }
.breadcrumb-light a{ color: var(--slate); }
.breadcrumb-light a:hover{ color: var(--copper); }

.was-helpful{
  border-top: 1px solid var(--line);
  margin-top: 44px;
  padding-top: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.was-helpful .btn{ padding: 9px 16px; }

/* Ticket form / status */
.priority-options{ display: flex; gap: 10px; flex-wrap: wrap; }
.priority-chip{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  padding: 9px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--slate);
  background: var(--white);
}
.priority-chip input{ display: none; }
.priority-chip:has(input:checked){
  border-color: var(--copper);
  color: var(--copper);
  background: rgba(189,107,76,0.06);
}

.status-card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.status-row{
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.status-row:last-child{ border-bottom: none; }
.status-row .k{ font-family: var(--font-mono); font-size: 0.78rem; color: var(--slate-light); }
.status-row .v{ font-family: var(--font-mono); font-size: 0.88rem; color: var(--ink); }

.badge{
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 5px 12px;
  border-radius: 20px;
}
.badge::before{ content: ""; width: 7px; height: 7px; border-radius: 50%; }
.badge-open{ background: rgba(189,107,76,0.1); color: var(--copper-dim); }
.badge-open::before{ background: var(--copper); }
.badge-progress{ background: rgba(28,58,86,0.08); color: var(--steel); }
.badge-progress::before{ background: var(--steel); }
.badge-resolved{ background: rgba(90,107,125,0.1); color: var(--slate); }
.badge-resolved::before{ background: #6a9a7a; }

.status-tabs{ display: flex; gap: 4px; margin-bottom: 32px; border-bottom: 1px solid var(--line); }
.status-tab{
  font-family: var(--font-mono);
  font-size: 0.84rem;
  padding: 12px 4px;
  margin-right: 28px;
  color: var(--slate-light);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  background: none; border-top: none; border-left: none; border-right: none;
}
.status-tab.active{ color: var(--ink); border-bottom-color: var(--copper); }