/* =========================================================
   Zainab Mohammed — Portfolio
   Graphite · editorial-tech · restrained steel-blue accent
   ========================================================= */

:root {
  --bg:       #0b0b0c;
  --bg-2:     #111113;
  --panel:    #141416;
  --line:     #232326;
  --line-2:   #2e2e33;
  --text:     #ededee;
  --muted:    #8d8d94;
  --dim:      #5c5c63;
  --accent:   #7f9cd4;
  --accent-2: #ffffff;
  --ok:       #3ddc84;
  --maxw:     1180px;
  --gutter:   clamp(20px, 5vw, 48px);
  --sans:     "Geist", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:     "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
/* faint engineering grid, fading out down the page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .35;
  mask-image: radial-gradient(ellipse 80% 60% at 70% 0%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 70% 0%, #000 0%, transparent 70%);
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.02em; }
::selection { background: var(--accent); color: #0b0b0c; }

.accent { color: var(--muted); }

/* ----------  Nav  ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 11, 12, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border: 1px solid var(--line-2);
  color: var(--text);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 13px;
  border-radius: 6px;
}
.brand__name { font-weight: 500; font-size: 15px; letter-spacing: -0.01em; }

.nav__links { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.nav__links a { color: var(--muted); transition: color .2s; }
.nav__links a:hover { color: var(--text); }
.nav__links .nav__cta {
  color: var(--text);
  padding: 7px 14px;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  transition: border-color .2s, background .2s;
}
.nav__links .nav__cta:hover { border-color: var(--accent); background: rgba(127, 156, 212, .08); }

.nav__toggle {
  display: none;
  width: 36px; height: 36px;
  background: none; border: 0; padding: 0;
  cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 6px;
}
.nav__toggle span { width: 22px; height: 1.5px; background: var(--text); transition: transform .25s; }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child  { transform: translateY(-3.75px) rotate(-45deg); }

/* ----------  Buttons  ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: transform .2s, background .2s, border-color .2s, color .2s;
}
.btn span { transition: transform .2s; }
.btn:hover span { transform: translateX(3px); }
.btn--primary { background: var(--text); color: #0b0b0c; }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { border: 1px solid var(--line-2); color: var(--text); }
.btn--ghost:hover { border-color: var(--muted); }

/* ----------  Hero  ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(60px, 11vh, 120px) var(--gutter) 72px;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 56px;
  align-items: center;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 28px;
  padding: 6px 14px 6px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.pill__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(61, 220, 132, .6);
  box-shadow: 0 0 0 3px rgba(61, 220, 132, .15);
}
.hero__title {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 500;
}
.hero__title .accent { display: block; }
.hero__lede {
  max-width: 520px;
  margin: 26px 0 34px;
  font-size: 1.12rem;
  color: var(--muted);
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; }

/* Terminal panel */
.term {
  background: var(--panel);
  border: 1px solid var(--line-2);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .8);
  font-family: var(--mono);
  font-size: 13px;
}
.term__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}
.term__bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.term__bar p { margin: 0 0 0 auto; color: var(--dim); font-size: 11.5px; }
.term__body { padding: 20px 20px 24px; min-height: 290px; }
.t-line {
  margin: 0 0 6px;
  white-space: pre;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .35s, transform .35s;
}
.t-line.on { opacity: 1; transform: none; }
.t-prompt { color: var(--accent); }
.t-dim { color: var(--dim); }
.t-ok { color: var(--ok); }
.t-tag { color: var(--ok); }
.t-accent { color: var(--text); }
.t-cursor {
  display: inline-block;
  width: 8px; height: 15px;
  margin-left: 4px;
  vertical-align: -2px;
  background: var(--muted);
  opacity: .7;
}

/* ----------  Stats strip  ---------- */
.stats {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stats div {
  padding: 26px 24px 26px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stats div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.stats strong {
  display: block;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.stats span { display: block; margin-top: 6px; font-size: 13.5px; color: var(--muted); }

/* ----------  Content blocks  ---------- */
.block {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 110px var(--gutter) 0;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
}
.block__head { position: sticky; top: 100px; align-self: start; }
.block__num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 8px;
}
.block__head h2 { font-size: 1.5rem; }

/* About */
.about { max-width: 720px; color: var(--muted); font-size: 1.05rem; }
.about p { margin: 0 0 18px; }
.about__lead {
  color: var(--text);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  font-weight: 500;
}
.about__quote {
  margin-top: 30px !important;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  color: var(--text);
}
.link {
  color: var(--text);
  border-bottom: 1px solid var(--accent);
  transition: color .2s;
}
.link:hover { color: var(--accent); }

/* Expertise */
.skills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.skill {
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background .25s;
}
.skill:hover { background: var(--bg-2); }
.skill__idx { margin: 0 0 18px; font-family: var(--mono); font-size: 12px; color: var(--accent); }
.skill h3 { font-size: 1.2rem; margin-bottom: 8px; }
.skill > p:not(.skill__idx) { margin: 0 0 20px; color: var(--muted); font-size: .95rem; }
.skill ul { display: flex; flex-wrap: wrap; gap: 6px; }
.skill li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding: 4px 9px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 5px;
}

/* Work */

.work { border-top: 1px solid var(--line); }
.work li { border-bottom: 1px solid var(--line); }
.work__row {
  display: grid;
  grid-template-columns: 48px 1fr auto 28px;
  gap: 20px;
  align-items: start;
  padding: 28px 8px;
  transition: background .25s, padding .25s;
}
.work__row:hover { background: var(--bg-2); padding-left: 16px; padding-right: 16px; }
.work__num { font-family: var(--mono); font-size: 13px; color: var(--dim); padding-top: 4px; }
.work__main { display: block; }
.work__title { display: block; font-size: 1.25rem; font-weight: 600; letter-spacing: -0.02em; transition: color .2s; }
.work__desc  { display: block; margin-top: 8px; max-width: 640px; color: var(--muted); font-size: .95rem; }
.work__tag {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  padding: 4px 10px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  white-space: nowrap;
  margin-top: 3px;
}
.work__arrow { font-size: 1.2rem; color: var(--dim); transition: color .2s, transform .2s; }
.work__row:hover .work__title { color: #fff; }
.work__row:hover .work__arrow { color: var(--accent); transform: translate(2px, -2px); }

/* Contact */
.contact {
  max-width: var(--maxw);
  margin: 130px auto 0;
  padding: 80px var(--gutter);
  border-top: 1px solid var(--line);
}
.contact__title {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 10px 0 22px;
}
.contact p { color: var(--muted); margin: 0 0 30px; max-width: 520px; }
.contact__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.contact__actions .btn { max-width: 100%; overflow-wrap: anywhere; }

/* Footer */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 26px var(--gutter);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--dim);
}

/* ----------  Case study pages  ---------- */
.cs-hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 64px var(--gutter) 0;
}
.cs-back {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  transition: color .2s;
}
.cs-back:hover { color: var(--text); }
.cs-eyebrow {
  margin: 48px 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.cs-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 500;
}
.cs-title span { display: block; color: var(--muted); }
.cs-lede {
  max-width: 720px;
  margin: 24px 0 44px;
  font-size: 1.12rem;
  color: var(--muted);
}
.cs-meta {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cs-meta div { padding: 20px 20px 20px 0; }
.cs-meta div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.cs-meta dt {
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--dim);
}
.cs-meta dd { margin: 0; font-size: .93rem; }

.cs-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cs-stats div { padding: 24px 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cs-stats dt { font-size: 1.85rem; font-weight: 500; letter-spacing: -0.03em; line-height: 1.1; }
.cs-stats dd { margin: 6px 0 0; font-size: 13px; color: var(--muted); line-height: 1.45; }

.cs-prose { max-width: 720px; color: var(--muted); font-size: 1.04rem; }
.cs-prose p { margin: 0 0 16px; }
.cs-prose strong { color: var(--text); font-weight: 500; }

.cs-modules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cs-module { padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cs-module h3 { font-size: 1.15rem; margin-bottom: 4px; }
.cs-module__sub { margin: 0 0 18px; font-family: var(--mono); font-size: 12px; color: var(--accent); }

.cs-list { display: grid; gap: 10px; }
.cs-list li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: .95rem;
}
.cs-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .78em;
  width: 8px; height: 1px;
  background: var(--accent);
}
.cs-list strong { color: var(--text); font-weight: 500; }
.cs-list code, .cs-prose code { font-family: var(--mono); font-size: .88em; color: var(--text); }
.cs-prose + .cs-list { margin-top: 8px; }

.cs-subhead {
  margin: 40px 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--dim);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding: 4px 9px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 5px;
}

/* Architecture diagram */
.arch { display: grid; grid-template-columns: 1fr 2fr; gap: 16px; }
.arch__col { display: flex; flex-direction: column; gap: 10px; }
.arch__label { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); }
.arch__box {
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: .88rem;
}
.arch__box small { display: block; margin-top: 2px; font-family: var(--mono); font-size: 11px; color: var(--muted); }
.arch__core { display: grid; gap: 10px; padding: 14px; border: 1px solid var(--line-2); border-radius: 8px; }
.arch__modules { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.arch__modules .arch__box { text-align: center; padding: 10px 6px; }
.arch__box--wide { text-align: center; }
.arch + .cs-list { margin-top: 28px; }

/* Other projects + pager */
.cs-more {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cs-more a {
  display: block;
  padding: 18px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.cs-more a:hover { background: var(--bg-2); }
.cs-more strong { display: block; font-weight: 500; }
.cs-more span { display: block; margin-top: 2px; font-size: 13px; color: var(--muted); }
.cs-more a[aria-current="page"] { pointer-events: none; background: var(--bg-2); }
.cs-more a[aria-current="page"] strong::after { content: " · current"; font-family: var(--mono); font-size: 11px; font-weight: 400; color: var(--dim); }
.cs-pager {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.cs-end { padding-bottom: 110px; }
.cs-page .block { padding-top: 88px; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ----------  Responsive  ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 48px; }
  .block { grid-template-columns: 1fr; gap: 24px; padding-top: 80px; }
  .block__head { position: static; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(3) { padding-left: 0; border-left: 0; }
  .stats div:nth-child(n+3) { border-top: 0; }
  .cs-meta { grid-template-columns: repeat(2, 1fr); }
  .cs-meta div:nth-child(3) { padding-left: 0; border-left: 0; }
  .cs-meta div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .cs-stats { grid-template-columns: repeat(2, 1fr); }
  .arch { grid-template-columns: 1fr; }
  .cs-more { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    inset: 65px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 20px;
    background: rgba(11, 11, 12, 0.97);
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%);
    transition: transform .3s ease;
  }
  .nav__links.open { transform: none; }
  .nav__links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav__links .nav__cta { border: 0; border-bottom: 1px solid var(--line); border-radius: 0; padding: 14px 0; }
  .skills { grid-template-columns: 1fr; }
  .cs-modules { grid-template-columns: 1fr; }
  .cs-module { padding: 24px; }
  .arch__modules { grid-template-columns: repeat(2, 1fr); }
  .cs-more { grid-template-columns: 1fr; }
  .work__row { grid-template-columns: 34px 1fr; gap: 12px; }
  .work__tag { grid-column: 2; justify-self: start; }
  .work__arrow { display: none; }
  .term { font-size: 11.5px; }
  .term__body { overflow-x: auto; }
  .footer { flex-direction: column; text-align: center; }
}

@media (max-width: 460px) {
  .stats { grid-template-columns: 1fr; }
  .stats div, .stats div + div { padding-left: 0; border-left: 0; border-top: 0; }
  .stats div:first-child { border-top: 1px solid var(--line); }
  .cs-meta { grid-template-columns: 1fr; }
  .cs-meta div, .cs-meta div + div { padding-left: 0; border-left: 0; }
  .cs-meta div + div { border-top: 1px solid var(--line); }
  .cs-stats { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .t-line, .reveal { opacity: 1; transform: none; }
}