/* ==========================================================================
   Tokens
   ========================================================================== */
:root{
  --bg:            #F6F7F9;
  --bg-panel:      #FFFFFF;
  --ink:           #10233F;
  --ink-muted:     #55617A;
  --ink-soft:      #8A93A6;
  --accent:        #0E6F65;
  --accent-soft:   #E4F0EE;
  --gold:          #B8912F;
  --gold-soft:     #F6EFDC;
  --line:          #DFE3E9;
  --panel-dark:    #10233F;
  --panel-dark-2:  #16304F;

  --font-sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-mono:  'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;

  --maxw: 1120px;
}

@media (prefers-color-scheme: dark){
  /* Intentionally keep a single light, corporate theme regardless of OS
     preference, for print/portfolio consistency. */
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

p{ margin: 0 0 1rem; color: var(--ink-muted); }
a{ color: inherit; }

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

.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
}
.skip-link:focus{ left: 16px; top: 16px; }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 247, 249, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.mark{
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 4px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.primary-nav{
  display: flex;
  align-items: center;
  gap: 28px;
}
.primary-nav a{
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--ink-muted);
  font-weight: 500;
  transition: color 0.15s ease;
}
.primary-nav a:hover,
.primary-nav a:focus-visible{ color: var(--accent); }
.nav-cta{
  border: 1px solid var(--ink);
  border-radius: 4px;
  padding: 7px 14px;
  color: var(--ink) !important;
}
.nav-cta:hover{
  background: var(--ink);
  color: #fff !important;
}

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span{
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

@media (max-width: 780px){
  .primary-nav{
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 28px 24px;
    gap: 16px;
    display: none;
  }
  .primary-nav.open{ display: flex; }
  .nav-toggle{ display: flex; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position: relative;
  padding: 120px 0 64px;
  overflow: hidden;
}
.hero-grid{
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 40%, transparent 85%);
          mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 40%, transparent 85%);
  opacity: 0.7;
}
.hero-inner{ position: relative; max-width: 760px; }
.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}
.hero-title{
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.02;
  margin-bottom: 22px;
}
.hero-lede{
  font-size: 1.15rem;
  max-width: 560px;
  color: var(--ink-muted);
  margin-bottom: 32px;
}
.hero-actions{ display: flex; gap: 14px; flex-wrap: wrap; }

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn-primary{ background: var(--ink); color: #fff; }
.btn-primary:hover{ background: var(--accent); }
.btn-ghost{ border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--ink); }

/* ==========================================================================
   Path diagram (signature element)
   ========================================================================== */
.path-section{
  padding: 8px 0 64px;
}
.path-diagram{ width: 100%; height: auto; display: block; }
.trace-line{
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  opacity: 0.55;
}
.node circle{
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 2.5;
}
.node-label{
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  fill: var(--ink);
}
.node-sub{
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--ink-soft);
}
.packet{ fill: var(--gold); }

/* ==========================================================================
   Sections (shared)
   ========================================================================== */
.section{ padding: 88px 0; border-top: 1px solid var(--line); }
.section-alt{ background: var(--bg-panel); }
.section-eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 10px;
}
.section-title{
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin-bottom: 36px;
  max-width: 620px;
}

.two-col{
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 860px){
  .two-col{ grid-template-columns: 1fr; }
}

.lede-serif{
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  margin-bottom: 22px;
}

.fact-card{
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px 26px 8px;
}
.fact-card h3{
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.fact-card-gold{ background: var(--gold-soft); border-color: #E9D9AE; }
.fact-list div{
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.fact-list div:last-child{ border-bottom: none; }
.fact-list dt{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.fact-list dd{ margin: 0; font-weight: 500; }

/* ==========================================================================
   Timeline
   ========================================================================== */
.timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--line);
}
.tl-item{
  position: relative;
  padding: 0 0 40px 32px;
}
.tl-item:last-child{ padding-bottom: 0; }
.tl-item::before{
  content: '';
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-panel);
  border: 2.5px solid var(--accent);
}
.tl-date{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 6px;
}
.tl-body h3{
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-weight: 600;
}
.tl-org{
  font-weight: 400;
  color: var(--ink-muted);
  font-size: 0.95rem;
}
.tl-body p{ max-width: 640px; margin-bottom: 0; }

/* ==========================================================================
   Skills
   ========================================================================== */
.skill-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 860px){
  .skill-grid{ grid-template-columns: 1fr; }
}
.skill-card{
  background: var(--panel-dark);
  color: #fff;
  border-radius: 10px;
  padding: 28px;
}
.skill-card h3{
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 18px;
}
.tag-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tag-list li{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #C9D3DE;
  padding-left: 16px;
  position: relative;
}
.tag-list li::before{
  content: '›';
  position: absolute;
  left: 0;
  color: var(--gold);
}

/* ==========================================================================
   Credentials
   ========================================================================== */
.sub-heading{
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  margin: 28px 0 14px;
}
.sub-heading:first-of-type{ margin-top: 0; }
.cert-list{
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
}
.cert-list li{
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 500;
}
.cert-list li:last-child{ border-bottom: none; }

.honor-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.honor-list li{
  font-weight: 500;
  padding-bottom: 16px;
  border-bottom: 1px solid #E9D9AE;
}
.honor-list li:last-child{ border-bottom: none; padding-bottom: 0; }

/* ==========================================================================
   Work / Writing
   ========================================================================== */
.work-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 860px){
  .work-grid{ grid-template-columns: 1fr; }
}
.work-card{
  display: block;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.work-card:hover{
  border-color: var(--accent);
  transform: translateY(-2px);
}
.work-kind{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.work-card h3{ margin: 10px 0 8px; font-size: 1.1rem; }
.work-card p{ font-size: 0.92rem; margin-bottom: 14px; }
.work-link{
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-section{ background: var(--panel-dark); }
.contact-section .section-eyebrow{ color: #8FB6AF; }
.contact-section .section-title{ color: #fff; }
.contact-lede{ color: #C9D3DE; max-width: 520px; margin-bottom: 40px; font-size: 1.05rem; }

.contact-links{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  overflow: hidden;
}
@media (max-width: 600px){
  .contact-links{ grid-template-columns: 1fr; }
}
.contact-link{
  background: var(--panel-dark-2);
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  transition: background 0.15s ease;
}
a.contact-link:hover{ background: #1C3A5E; }
.contact-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8FB6AF;
}
.contact-value{ color: #fff; font-weight: 500; word-break: break-word; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{
  background: var(--panel-dark);
  color: #8FA0B8;
  padding: 24px 0 32px;
  font-size: 0.85rem;
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.reveal{
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}