:root {
  --bg: #F5F6F7;
  --panel: #FFFFFF;
  --line: #D9DEE4;
  --text: #1D2D3E;
  --muted: #556B82;
  --accent: #0062D6;
  --accent-2: #004BB0;
  --warn: #8A5A00;
  --danger: #AA0808;
  --ok: #256F3A;
  --shadow: 0 8px 24px rgba(29, 45, 62, 0.08);
  --radius: 14px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --display: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #ffffff;
  padding: 0.55rem 0.9rem;
  z-index: 50;
  font-weight: 700;
  border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #1A2B3C;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #E8EEF5;
  text-decoration: none;
  font-weight: 700;
}
.brand:hover { text-decoration: none; }
/* Legacy brand styles — prefer brand-nav.css for nav headshot */
.brand-mark {
  display: none;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.95rem;
}
.nav-links a {
  color: #E8EEF5;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.28rem 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: #7CB8FF;
  border-bottom-color: #7CB8FF;
}
.nav-links a.nav-quiet {
  font-weight: 500;
  opacity: 0.9;
}
.nav-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: transparent;
  color: #E8EEF5;
  border-radius: 10px;
  padding: 0.42rem 0.7rem;
  font-weight: 700;
  cursor: pointer;
}

.hero {
  max-width: 1160px;
  margin: 0 auto;
  padding: 3.2rem 1.25rem 1.5rem;
}
.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.15;
  margin: 0 0 0.85rem;
  max-width: 20ch;
}
.hero p.lead {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.6;
  max-width: 58ch;
  margin: 0 0 1.5rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.track-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.25rem;
}
.track-chip {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #FFFFFF;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.16s ease, border-color 0.16s ease;
}
.track-chip:hover {
  transform: translateY(-2px);
  text-decoration: none;
}
.track-chip .track-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.track-chip strong {
  font-size: 0.98rem;
}
.track-chip span:last-child {
  color: var(--muted);
  font-size: 0.82rem;
}
.track-chip.track-ai:hover { border-color: rgba(129, 140, 248, 0.55); }
.track-chip.track-sc:hover { border-color: rgba(45, 212, 191, 0.55); }
.track-chip.track-sap:hover { border-color: rgba(0, 143, 211, 0.55); }
.track-chip.track-bi:hover { border-color: rgba(56, 189, 248, 0.55); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-radius: 999px;
  padding: 0.72rem 1.15rem;
  font-weight: 650;
  font-size: 0.92rem;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-2); color: #fff; filter: none; text-decoration: none; }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-2); text-decoration: none; }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0.5rem 0 1.5rem;
}
.filter-btn {
  border: 1px solid var(--line);
  background: #FFFFFF;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font-size: 0.86rem;
  cursor: pointer;
}
.filter-btn.active,
.filter-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(0, 98, 214, 0.08);
}

.section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 3rem;
}
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-bottom: 0.35rem;
}
.section-kicker {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.section h2 {
  font-family: var(--display);
  font-size: 1.65rem;
  margin: 0 0 0.4rem;
}
.section .sub {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 280px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(45, 212, 191, 0.45);
}
.card.hidden { display: none; }
.tag {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.tag-ai, .tag-sc, .tag-bi, .tag-sap { background: #E8F1FC; color: #004BB0; }
.card h3 { margin: 0; font-size: 1.2rem; line-height: 1.3; }
.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  flex: 1;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.8rem;
}
.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
}
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem;
  margin-bottom: 1rem;
}
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}
.kpi {
  background: #F5F6F7;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem;
}
.kpi .label { color: var(--muted); font-size: 0.78rem; margin-bottom: 0.35rem; }
.kpi .value { font-size: 1.45rem; font-weight: 750; }
.kpi .delta { font-size: 0.8rem; margin-top: 0.25rem; }
.delta.up { color: var(--ok); }
.delta.down { color: var(--danger); }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
th, td {
  text-align: left;
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid var(--line);
}
th { color: var(--muted); font-weight: 650; }
.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
}
.badge-ok { background: rgba(52, 211, 153, 0.15); color: var(--ok); }
.badge-warn { background: rgba(251, 191, 36, 0.15); color: var(--warn); }
.badge-bad { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

.chart { width: 100%; min-height: 320px; }
.two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
}

.footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.88rem;
}
.project-hero {
  max-width: 1160px;
  margin: 0 auto;
  padding: 2.4rem 1.25rem 1rem;
}
.project-hero h1 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  margin: 0.35rem 0 0.7rem;
}
.breadcrumb {
  color: var(--muted);
  font-size: 0.85rem;
}
.breadcrumb a { color: var(--muted); }
.steps { display: grid; gap: 0.75rem; }
.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0.75rem;
  align-items: start;
}
.step-num {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #E8F1FC;
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 800;
}
code, .mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
}
pre {
  background: #0a101b;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem;
  overflow-x: auto;
  color: #dbe7ff;
  font-size: 0.82rem;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.55rem;
    padding: 0.25rem 0 0.55rem;
  }
  .nav-links.open { display: flex; }
  .track-strip { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; }
  .hero h1 { max-width: none; }
}

@media (max-width: 560px) {
  .track-strip { grid-template-columns: 1fr; }
}