/* =========================================================================
   Christopher Kokoski - Portfolio Hub
   Shared styling. Calm, professional, deep-blue palette.
   ========================================================================= */

:root {
  /* Palette */
  --ink:          #11243d;   /* primary text */
  --navy:         #1d3a5f;   /* brand navy */
  --navy-deep:    #0f2742;   /* darker navy for depth */
  --accent:       #2557d6;   /* confident blue accent */
  --accent-dark:  #1c47b4;   /* hover/active accent */
  --bg:           #f4f7fb;   /* page background */
  --bg-tint:      #eef3fa;   /* subtle section tint */
  --surface:      #ffffff;   /* cards */
  --line:         #e1e8f2;   /* hairlines */
  --line-strong:  #cfdaea;
  --muted:        #4a5b73;   /* secondary text */
  --muted-soft:   #6f7f96;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, "Cascadia Code", "SFMono-Regular", "Segoe UI Mono", Consolas, monospace;

  /* Rhythm */
  --maxw: 1080px;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 39, 66, 0.04), 0 1px 3px rgba(15, 39, 66, 0.06);
  --shadow-md: 0 10px 30px -12px rgba(15, 39, 66, 0.20), 0 4px 10px -6px rgba(15, 39, 66, 0.10);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 480px at 85% -8%, rgba(37, 87, 214, 0.06), transparent 60%),
    radial-gradient(900px 420px at -5% 0%, rgba(29, 58, 95, 0.05), transparent 55%);
  background-repeat: no-repeat;
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

:focus-visible {
  outline: 3px solid rgba(37, 87, 214, 0.45);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Layout -------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.page { padding-bottom: 72px; }

/* ---- Eyebrow / small labels --------------------------------------------- */
.eyebrow {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}

/* ---- Top bar ------------------------------------------------------------- */
.topbar {
  padding: 26px 0 0;
}
.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.wordmark:hover { color: var(--ink); }
.wordmark .mono {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--navy);
  color: #fff;
  font-size: 0.92rem;
  letter-spacing: -0.04em;
  box-shadow: var(--shadow-sm);
}
.backlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
}
.backlink:hover { color: var(--accent); }
.backlink .arrow { transition: transform 0.22s ease; }
.backlink:hover .arrow { transform: translateX(-3px); }

/* ---- Hero ---------------------------------------------------------------- */
.hero { padding: 64px 0 18px; }
.hero .name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  color: var(--ink);
}
.hero .lede {
  font-size: clamp(1.08rem, 2.2vw, 1.32rem);
  line-height: 1.55;
  color: var(--ink);
  max-width: 40ch;
  margin: 0;
}
.hero .hero-note {
  font-size: 1.04rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 56ch;
  margin: 20px 0 0;
}

/* Section page header */
.section-head { padding: 52px 0 12px; }
.section-head h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.1rem, 4.6vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.section-head .intro {
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  color: var(--muted);
  max-width: 60ch;
  margin: 0;
}

/* Thin rule */
.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 40px 0;
}

/* =========================================================================
   Homepage lane cards
   ========================================================================= */
.lanes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 46px;
}

.lane {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 30px 28px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.26s cubic-bezier(.2,.7,.3,1),
              box-shadow 0.26s ease,
              border-color 0.26s ease;
}
/* growing accent bar on the left */
.lane::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s cubic-bezier(.2,.7,.3,1);
}
.lane:hover,
.lane:focus-visible {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
  color: var(--ink);
}
.lane:hover::before,
.lane:focus-visible::before { transform: scaleY(1); }

.lane__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 18px;
}
.lane__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--ink);
}
.lane__desc {
  font-size: 1rem;
  color: var(--muted);
  margin: 0;
}
.lane__cta {
  margin-top: auto;
  padding-top: 24px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--accent);
}
.lane__cta .arrow { transition: transform 0.24s ease; }
.lane:hover .lane__cta .arrow,
.lane:focus-visible .lane__cta .arrow { transform: translateX(4px); }
.lane__ext {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--muted-soft);
}

/* =========================================================================
   Project cards (section pages)
   ========================================================================= */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 8px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.24s cubic-bezier(.2,.7,.3,1),
              box-shadow 0.24s ease,
              border-color 0.24s ease;
}
a.card { color: var(--ink); }
a.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
  color: var(--ink);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--bg-tint);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 999px;
}
.tag--file {
  color: var(--accent);
  background: rgba(37, 87, 214, 0.07);
  border-color: rgba(37, 87, 214, 0.18);
}
.tag--soon {
  color: var(--muted);
  background: transparent;
  border-style: dashed;
  border-color: var(--line-strong);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--ink);
}
.card__desc {
  font-size: 0.98rem;
  color: var(--muted);
  margin: 0;
}
.card__cta {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent);
}
.card__cta .arrow { transition: transform 0.22s ease; }
a.card:hover .card__cta .arrow { transform: translateX(4px); }

/* Placeholder (link-to-come) cards */
.card--soon {
  background: linear-gradient(180deg, #fbfcfe 0%, #f7f9fc 100%);
  border-style: dashed;
  border-color: var(--line-strong);
  box-shadow: none;
}
.card--soon .card__title { color: var(--navy); }
.card__cta--soon {
  color: var(--muted-soft);
  font-weight: 600;
}

/* Small note under a group of cards */
.cards-note {
  margin: 24px 2px 0;
  font-size: 0.86rem;
  color: var(--muted-soft);
}

/* =========================================================================
   Approach strip (diagrams) on AI Enablement page
   ========================================================================= */
.approach {
  margin-top: 56px;
  padding: 40px 32px 36px;
  background: var(--bg-tint);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.approach h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--ink);
}
.approach p.approach__lede {
  font-size: 1rem;
  color: var(--muted);
  max-width: 64ch;
  margin: 0 0 30px;
}
.figs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}
.fig {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}
.fig img { border-radius: 6px; }
.fig figcaption {
  margin-top: 14px;
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
}
.fig figcaption strong {
  display: block;
  color: var(--ink);
  font-size: 0.9rem;
  margin-bottom: 3px;
}

/* =========================================================================
   Enablement toolkit subsection (AI Enablement page)
   ========================================================================= */
.toolkit {
  margin-top: 56px;
  padding-top: 46px;
  border-top: 1px solid var(--line);
}
.toolkit__title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--ink);
}
.toolkit__lede {
  font-size: 1rem;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 28px;
}

/* =========================================================================
   Footer
   ========================================================================= */
.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--line);
  padding: 34px 0 46px;
}
.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.site-footer .who {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink);
}
.foot-links {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.foot-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--muted);
}
.foot-links a:hover { color: var(--accent); }
.foot-links svg { flex: none; }

/* =========================================================================
   Entrance animation (staggered)
   ========================================================================= */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  animation: riseIn 0.7s cubic-bezier(.2,.7,.3,1) forwards;
}
.d1 { animation-delay: 0.05s; }
.d2 { animation-delay: 0.14s; }
.d3 { animation-delay: 0.23s; }
.d4 { animation-delay: 0.32s; }
.d5 { animation-delay: 0.41s; }
.d6 { animation-delay: 0.50s; }

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 860px) {
  .lanes { grid-template-columns: 1fr; gap: 16px; }
  .lane { min-height: 0; }
  .cards { grid-template-columns: 1fr; }
  .figs { grid-template-columns: 1fr; }
  .approach { padding: 30px 22px; }
}

@media (max-width: 540px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .hero { padding: 44px 0 8px; }
  .topbar .backlink span.label { display: none; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; animation: none; }
  * { transition: none !important; }
}