/* =========================================================
   CoreSilicon Technologies — Design System
   Palette: engineering blue on white, hairline structure
   Type: Space Grotesk (display) / IBM Plex Sans (body) / IBM Plex Mono (data)
   ========================================================= */

:root{
  --bg:            #FFFFFF;
  --bg-soft:       #F4F7FB;
  --bg-panel:      #EEF3F9;
  --ink:           #0E1B33;
  --ink-soft:      #33415C;
  --text-secondary:#5B6779;
  --primary:       #1B4D8C;
  --primary-dark:  #123761;
  --primary-tint:  #E7EFF8;
  --accent:        #1C8C93;
  --accent-tint:   #E4F4F4;
  --line:          #DCE3EC;
  --line-strong:   #B9C5D6;
  --ok:            #1E8E5A;
  --warn:          #B9791A;

  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body:    "IBM Plex Sans", sans-serif;
  --font-mono:    "IBM Plex Mono", monospace;

  --maxw: 1180px;
  --radius: 3px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  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: var(--primary); text-decoration:none; }
a:hover{ text-decoration: underline; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}
h1{ font-size: clamp(2.1rem, 4vw, 3.15rem); }
h2{ font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3{ font-size: 1.2rem; }
p{ margin: 0 0 1em 0; color: var(--ink-soft); max-width: 62ch; }
.lede{ font-size: 1.15rem; color: var(--ink-soft); }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

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

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------------- Header / Nav ---------------- */
.site-header{
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(140%) blur(6px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 16px 28px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}
.brand:hover{ text-decoration:none; }
.brand-mark{
  width: 30px; height: 30px;
  flex-shrink:0;
}
.brand-sub{
  display:block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

.nav-links{
  display:flex;
  align-items:center;
  gap: 28px;
  list-style:none;
  margin:0; padding:0;
}
.nav-links a{
  color: var(--ink-soft);
  font-size: 0.94rem;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover{ color: var(--primary); text-decoration:none; }
.nav-links a.active{
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.nav-cta{
  background: var(--primary);
  color: #fff !important;
  padding: 9px 18px !important;
  border-radius: var(--radius);
  border-bottom: none !important;
}
.nav-cta:hover{ background: var(--primary-dark); text-decoration:none; }

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line-strong); border-radius: var(--radius);
  width:40px; height:36px; cursor:pointer;
  align-items:center; justify-content:center;
}
.nav-toggle svg{ width:18px; height:18px; }

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor:pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover{ text-decoration:none; }
.btn-primary{ background: var(--primary); color:#fff; }
.btn-primary:hover{ background: var(--primary-dark); }
.btn-ghost{ background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover{ border-color: var(--primary); color: var(--primary); }
.btn-block{ width:100%; justify-content:center; }

/* ---------------- Hero ---------------- */
.hero{
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items:center;
}
.eyebrow-line{
  display:flex;
  align-items:center;
  gap:10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow-line .rule{ width:26px; height:1px; background: var(--accent); display:inline-block; }
.hero-actions{ display:flex; gap:14px; margin-top: 28px; flex-wrap:wrap; }
.hero-stats{
  display:flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  flex-wrap:wrap;
}
.stat .num{
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--primary);
  display:block;
}
.stat .label{ font-size: 0.82rem; color: var(--text-secondary); }
.hero-visual{ width:100%; }
.hero-visual svg{ width:100%; height:auto; }

/* ---------------- Section scaffolding ---------------- */
.section{ padding: 72px 0; }
.section-alt{ background: var(--bg-soft); }
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap:wrap;
}
.section-head .kicker{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  display:block;
  margin-bottom: 10px;
}
.section-head p{ margin:0; }

/* ---------------- Grid blocks (floorplan-inspired) ---------------- */
.block-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.block{
  background: #fff;
  padding: 28px;
}
.block .tag{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  display:block;
  margin-bottom: 12px;
}
.block h3{ margin-bottom: 8px; }
.block p{ font-size: 0.95rem; margin-bottom:0; }

/* ---------------- IP Catalog table ---------------- */
.ip-table-wrap{
  border: 1px solid var(--line);
  overflow-x:auto;
}
table.ip-table{
  width:100%;
  border-collapse: collapse;
  min-width: 720px;
}
.ip-table th, .ip-table td{
  text-align:left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  vertical-align: top;
}
.ip-table th{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line-strong);
}
.ip-table tr:last-child td{ border-bottom:none; }
.ip-code{
  font-family: var(--font-mono);
  color: var(--primary-dark);
  font-size: 0.88rem;
}
.status-pill{
  display:inline-block;
  padding: 3px 9px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  white-space:nowrap;
}
.status-proven{ background: #E4F4EC; color: var(--ok); }
.status-progress{ background: #FBF0DE; color: var(--warn); }
.status-planned{ background: var(--bg-panel); color: var(--text-secondary); }

.catalog-note{
  margin-top: 18px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ---------------- Training course list ---------------- */
.course-list{ display:flex; flex-direction:column; border-top: 1px solid var(--line); }
.course-row{
  display:grid;
  grid-template-columns: 1.6fr 0.6fr 0.6fr 0.7fr auto;
  gap: 18px;
  align-items:center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.course-row .meta-label{
  display:block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.course-row h3{ margin-bottom: 4px; font-size: 1.05rem; }
.course-row p{ margin:0; font-size: 0.88rem; }

/* ---------------- Updates / timeline ---------------- */
.timeline{ border-top: 1px solid var(--line); }
.update-item{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.update-date{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  padding-top: 3px;
}
.update-tag{
  display:inline-block;
  margin-bottom:10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--primary);
  background: var(--primary-tint);
  padding: 3px 8px;
  border-radius: 100px;
}
.update-item h3{ margin-bottom: 8px; }
.update-item p{ margin-bottom: 0; }
#updates-empty{ display:none; padding: 40px 0; color: var(--text-secondary); }

/* ---------------- Forms ---------------- */
.form-shell{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items:start;
}
.form-panel{
  border: 1px solid var(--line);
  padding: 36px;
  background: #fff;
}
.field{ margin-bottom: 20px; }
.field label{
  display:block;
  font-size: 0.85rem;
  font-weight:600;
  color: var(--ink);
  margin-bottom: 6px;
}
.field .hint{ font-size: 0.78rem; color: var(--text-secondary); margin-top:4px; }
.field input,
.field select,
.field textarea{
  width:100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}
.field textarea{ min-height: 120px; resize: vertical; }
.field-row{ display:grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note{
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 16px;
}
#form-status{
  margin-top: 16px;
  font-size: 0.9rem;
  display:none;
  padding: 12px 14px;
  border-radius: var(--radius);
}
#form-status.ok{ display:block; background:#E4F4EC; color: var(--ok); }
#form-status.err{ display:block; background:#FDEAEA; color:#B23A3A; }

.side-info h3{ margin-top:0; }
.info-list{ list-style:none; margin:24px 0 0; padding:0; }
.info-list li{
  padding: 14px 0;
  border-top: 1px solid var(--line);
  display:flex;
  gap:14px;
}
.info-list li:last-child{ border-bottom: 1px solid var(--line); }
.info-list .ico{ color: var(--accent); flex-shrink:0; margin-top:2px; }
.info-list strong{ display:block; font-size:0.92rem; }
.info-list span{ font-size: 0.85rem; color: var(--text-secondary); }

/* ---------------- About / values ---------------- */
.two-col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items:center;
}
.value-list{ list-style:none; margin:0; padding:0; }
.value-list li{
  padding: 20px 0;
  border-top: 1px solid var(--line);
  display:grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
}
.value-list li:last-child{ border-bottom: 1px solid var(--line); }
.value-list .num{
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
}
.value-list h3{ margin-bottom:4px; font-size: 1rem; }
.value-list p{ margin:0; font-size: 0.92rem; }

/* ---------------- CTA band ---------------- */
.cta-band{
  background: var(--primary-dark);
  color: #fff;
  padding: 56px 0;
}
.cta-band h2{ color:#fff; }
.cta-band p{ color: #C9D7EA; }
.cta-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 24px;
  flex-wrap:wrap;
}
.cta-band .btn-ghost{ color:#fff; border-color: rgba(255,255,255,0.35); }
.cta-band .btn-ghost:hover{ border-color:#fff; color:#fff; }

/* ---------------- Footer ---------------- */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 48px 0 28px;
  background: var(--bg-soft);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.footer-grid h4{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-weight:600;
}
.footer-links{ list-style:none; margin:0; padding:0; }
.footer-links li{ margin-bottom: 10px; }
.footer-links a{ color: var(--ink-soft); font-size: 0.9rem; }
.footer-links a:hover{ color: var(--primary); }
.footer-bottom{
  display:flex;
  justify-content:space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--text-secondary);
  flex-wrap:wrap;
  gap: 10px;
}

/* ---------------- Page header (inner pages) ---------------- */
.page-header{
  padding: 52px 0 44px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}
.page-header .kicker{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  display:block;
  margin-bottom: 12px;
}
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.breadcrumb a{ color: var(--text-secondary); }

/* ---------------- Responsive ---------------- */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-visual{ order:-1; max-width: 420px; margin: 0 auto; }
  .block-grid{ grid-template-columns: 1fr; }
  .form-shell{ grid-template-columns: 1fr; }
  .two-col{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .course-row{
    grid-template-columns: 1fr 1fr;
    row-gap: 6px;
  }
  .course-row .btn{ grid-column: 1 / -1; margin-top:8px; }
}
@media (max-width: 720px){
  .nav-links{
    position:absolute;
    top: 100%; left:0; right:0;
    background:#fff;
    border-bottom: 1px solid var(--line);
    flex-direction:column;
    align-items:flex-start;
    padding: 18px 28px;
    gap: 14px;
    display:none;
  }
  .nav-links.open{ display:flex; }
  .nav-toggle{ display:flex; }
  .update-item{ grid-template-columns: 1fr; gap:6px; }
  .field-row{ grid-template-columns: 1fr; }
  .cta-row{ flex-direction:column; align-items:flex-start; }
  .footer-grid{ grid-template-columns: 1fr; }
}