/* ==========================================================================
   Kenneth Chinemerem — IT Presales Engineer
   Editorial profile site. No external fonts, frameworks, or icon libraries.
   ========================================================================== */

:root {
  --ink: #10151c;
  --ink-2: #2b333e;
  --muted: #5c6673;
  --muted-light: #b9c0c9;
  --paper: #f6f4ef;
  --paper-2: #efebe2;
  --line: #d9d3c7;
  --line-strong: #b6ae9f;
  --accent: #a84320;
  --accent-ink: #7c2f14;
  --focus: #1d4ed8;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;

  --max: 1180px;
  --gutter: clamp(1.15rem, 3.4vw, 2.75rem);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img { height: auto; }

h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }

ul, ol { padding: 0; }

a { color: inherit; }

::selection { background: var(--accent); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 1px;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-decoration: none;
}

.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------------------
   Typography helpers
   -------------------------------------------------------------------------- */

.eyebrow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  line-height: 1.5;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  flex: 0 0 26px;
  height: 1px;
  background: var(--accent);
}

.lede {
  max-width: 58ch;
  color: var(--ink-2);
  font-size: 1.05rem;
}

.section-head {
  max-width: 780px;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.section-head h2 {
  max-width: 20ch;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-wrap: balance;
}

.section-sub {
  max-width: 62ch;
  margin-top: 1rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 244, 239, 0.94);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.brand-name {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  list-style: none;
}

.site-nav ul a {
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav ul a:hover { color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  background: transparent;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.button:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--paper);
}

.button-ghost {
  background: transparent;
  color: var(--ink);
}

.button-ghost:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.button-small {
  min-height: 38px;
  padding: 0.5rem 0.9rem;
  font-size: 0.68rem;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: start;
  gap: clamp(2rem, 6vw, 5.5rem);
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(3rem, 7vw, 5.5rem);
}

.hero-copy { padding-top: clamp(0rem, 2vw, 1.2rem); }

.hero h1 {
  max-width: 16ch;
  font-family: var(--serif);
  font-size: clamp(2.35rem, 5.2vw, 4.35rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.02;
  text-wrap: balance;
}

.hero h1 em {
  color: var(--accent);
  font-style: italic;
}

.hero .lede { margin-top: 1.5rem; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.7rem;
  list-style: none;
}

.chips li {
  padding: 0.34rem 0.68rem;
  border: 1px solid var(--line-strong);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.9rem;
}

.availability {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  margin-top: 1.4rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.6;
}

.availability::before {
  content: "";
  flex: 0 0 7px;
  width: 7px;
  height: 7px;
  margin-top: 0.15em;
  border-radius: 50%;
  background: #2f7d5b;
}

.hero-portrait {
  position: relative;
  margin: 0;
}

.hero-portrait::before {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  z-index: -1;
  border: 1px solid var(--line-strong);
}

.hero-portrait img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.02);
}

.hero-portrait figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.8rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Work cards
   -------------------------------------------------------------------------- */

.work {
  padding-block: clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid var(--line);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 1.7rem clamp(1rem, 2vw, 1.7rem) 1.5rem;
  border-left: 1px solid var(--line);
  transition: background 180ms ease;
}

.card:first-child { border-left: 0; }

.card:hover { background: var(--paper-2); }

.card-num {
  margin-bottom: 1.6rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.card h3 {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2vw, 1.45rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.card p {
  margin-top: 0.85rem;
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.62;
}

.card .evidence-line {
  margin-top: 1.2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  line-height: 1.7;
}

.evidence-label {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-link {
  align-self: flex-start;
  margin-top: 1.35rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--accent);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.card-link::after { content: " →"; }

.card-link:hover { color: var(--accent); }

/* --------------------------------------------------------------------------
   Method workflows
   -------------------------------------------------------------------------- */

.method {
  padding-block: clamp(3.5rem, 8vw, 6rem) clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
}

.case {
  max-width: 1080px;
  margin-top: clamp(3rem, 7vw, 5rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line-strong);
}

.case:first-of-type { margin-top: 0; }

.case-head { max-width: 840px; }

.case-head h3 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-wrap: balance;
}

.case-deck {
  max-width: 64ch;
  margin-top: 1rem;
  color: var(--ink-2);
  font-size: 1.05rem;
}

.case-output {
  margin-top: 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.7;
}

.case-output span {
  margin-right: 0.45rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
  gap: clamp(2rem, 5vw, 4rem);
  margin-top: clamp(2rem, 4vw, 3rem);
}

.case-main { max-width: 68ch; }

.step {
  padding-block: 1.15rem;
  border-top: 1px solid var(--line);
}

.step:first-child { border-top: 0; padding-top: 0; }

.step h4 {
  margin-bottom: 0.55rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.step p {
  color: var(--ink-2);
  font-size: 0.97rem;
  line-height: 1.7;
}

.step-outcome {
  padding: 1.1rem 1.2rem;
  border-top: 1px solid var(--accent);
  border-left: 2px solid var(--accent);
  background: var(--paper-2);
}

.case-evidence {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
  padding: 1.2rem;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.case-evidence h4 {
  margin-bottom: 0.7rem;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.case-evidence ul { list-style: none; }

.case-evidence li {
  padding-block: 0.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.68rem;
  line-height: 1.55;
}

.case-evidence .note {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Credentials
   -------------------------------------------------------------------------- */

.credentials {
  padding-block: clamp(3.5rem, 8vw, 6rem);
  border-top: 1px solid var(--line);
}

.cred-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(1.5rem, 4vw, 3.5rem);
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.cred-list li {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.05rem;
  border-bottom: 1px solid var(--line);
}

.cred-main { min-width: 0; }

.cred-main strong {
  display: block;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.35;
}

.cred-main span {
  display: block;
  margin-top: 0.18rem;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.cred-side {
  flex: 0 0 auto;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  line-height: 1.7;
  text-align: right;
}

.cred-side span { display: block; }

.cred-date { color: var(--ink-2); }

.cred-status { color: var(--accent-ink); }

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.contact-inner {
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--ink);
  color: var(--paper);
}

.contact-inner .eyebrow { color: var(--muted-light); }

.contact-inner h2 {
  max-width: 18ch;
  font-family: var(--serif);
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.04;
  text-wrap: balance;
}

.contact-lede {
  max-width: 54ch;
  margin-top: 1rem;
  color: var(--muted-light);
}

.contact-mail {
  display: inline-block;
  margin-top: 1.8rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--accent);
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 3.2vw, 1.9rem);
  letter-spacing: -0.01em;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.contact-mail:hover { color: #e9b49f; }

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(246, 244, 239, 0.18);
  list-style: none;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-decoration: none;
  text-transform: uppercase;
}

.contact-links a:hover { color: #e9b49f; }

.ext { width: 11px; height: 11px; }

.contact-inner .availability {
  margin-top: 1.6rem;
  color: var(--muted-light);
  font-size: 0.68rem;
}

.contact-inner :focus-visible { outline-color: #9cc3ff; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  padding-block: 1.8rem 2.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Reveal (JS-enhanced, off by default)
   -------------------------------------------------------------------------- */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero h1 { max-width: 18ch; }

  .hero-portrait {
    width: min(100%, 420px);
  }

  .case-body {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .case-evidence {
    position: static;
  }

  .cred-list { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 0.8rem var(--gutter) 1.4rem;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

  .site-nav.is-open { display: flex; }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav ul a {
    display: block;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--line);
  }

  .site-nav .button { align-self: flex-start; margin-top: 0.4rem; }
}

@media (max-width: 760px) {
  .cards { grid-template-columns: 1fr; }

  .card {
    border-top: 1px solid var(--line);
    border-left: 0;
    padding-inline: 0;
  }

  .card:first-child { border-top: 0; }

  .card-num { margin-bottom: 1rem; }
}

@media (max-width: 480px) {
  .brand-name { font-size: 0.82rem; }

  .hero h1 { font-size: clamp(2rem, 10.5vw, 2.6rem); }

  .actions { flex-direction: column; align-items: stretch; }

  .actions .button { width: 100%; }

  .hero-portrait { width: 100%; }

  .hero-portrait figcaption { font-size: 0.6rem; }

  .chips li { font-size: 0.64rem; }

  .contact-mail { font-size: 1.05rem; }

  .contact-inner { padding: 1.4rem; }

  .contact-links { gap: 1rem; }

  .cred-list li { flex-direction: column; gap: 0.4rem; }

  .cred-side { text-align: left; }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */

@media print {
  :root {
    --paper: #ffffff;
    --ink: #000000;
    --ink-2: #111111;
    --muted: #444444;
    --line: #cccccc;
    --line-strong: #999999;
  }

  html { scroll-behavior: auto; }

  body {
    background: #fff;
    color: #000;
    font-size: 10.5pt;
    line-height: 1.45;
  }

  .site-header,
  .nav-toggle,
  .actions,
  .contact-links,
  .site-footer p:last-child {
    display: none !important;
  }

  .wrap {
    max-width: none;
    padding-inline: 0;
  }

  .hero {
    display: block;
    padding-block: 0 1.2rem;
    border-bottom: 1px solid #999;
  }

  .hero-portrait {
    float: right;
    width: 32mm;
    margin: 0 0 6mm 8mm;
  }

  .hero-portrait::before { display: none; }

  .hero h1 { font-size: 24pt; }

  .hero .lede { font-size: 10pt; }

  .chips { display: none; }

  .work,
  .cases,
  .credentials {
    padding-block: 1.2rem;
  }

  .cards {
    display: block;
    border-top: 0;
  }

  .card {
    padding: 0.6rem 0;
    border-left: 0;
  }

  .case {
    margin-top: 1.2rem;
    padding-top: 1rem;
    break-inside: avoid;
  }

  .case-body {
    display: block;
    margin-top: 0.8rem;
  }

  .case-evidence {
    position: static;
    margin-top: 0.8rem;
    padding: 0.6rem;
    background: none;
  }

  .step { padding-block: 0.5rem; }

  .step-outcome { background: none; }

  .contact {
    padding-block: 1rem;
  }

  .contact-inner {
    padding: 0;
    background: none;
    color: #000;
  }

  .contact-inner .eyebrow,
  .contact-lede,
  .contact-inner .availability {
    color: #333;
  }

  .contact-mail { color: #000; }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  a { text-decoration: underline; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 8pt; }
}