/* ============================================================
   Omar Hamzat — portfolio
   Technical / engineered: monospace labels, square corners, 2px
   rules, hard offset shadows, faint graph-paper grid. No gradients,
   no blur, no border-radius anywhere.
   Theme tokens in :root; [data-theme="dark"] overrides them.
   ============================================================ */

:root {
  /* Warm paper and ink, deliberately not the usual navy/slate */
  --paper:      #eae7e0;
  --paper-2:    #e2ded5;
  --surface:    #f4f2ec;
  --ink:        #14120f;
  --ink-2:      #4a453d;
  --ink-3:      #7d766a;
  --rule:       #14120f;
  --rule-soft:  #c9c3b6;
  --accent:     #d63a10;
  --accent-ink: #ffffff;
  --grid-line:  rgba(20, 18, 15, 0.045);

  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --border:    2px solid var(--rule);
  --hair:      1px solid var(--rule-soft);
  --offset:    5px;
  --maxw:      1140px;
  --pad:       clamp(1.15rem, 4vw, 2.5rem);
}

[data-theme="dark"] {
  --paper:      #121110;
  --paper-2:    #1a1917;
  --surface:    #1a1917;
  --ink:        #eae7e0;
  --ink-2:      #b0a99c;
  --ink-3:      #837c70;
  --rule:       #4d473e;
  --rule-soft:  #332f2a;
  --accent:     #ff5c2e;
  --accent-ink: #14120f;
  --grid-line:  rgba(234, 231, 224, 0.04);
}

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

/* An explicit `display` on a selector beats the UA rule for [hidden], which
   would otherwise leave hidden elements (the broken portrait, the empty/error
   states) still taking up space. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--paper);
  /* Graph paper: 1px hairlines on a 40px module */
  background-image:
    repeating-linear-gradient(to right, var(--grid-line) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(to bottom, var(--grid-line) 0 1px, transparent 1px 40px);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; line-height: 1.05; }

a { color: var(--ink); text-decoration: none; }

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; font-family: var(--font-mono); font-size: .8rem;
  text-transform: uppercase; letter-spacing: .1em;
}
.skip-link:focus { left: 0; }

/* ---------- Shared mono label treatment ---------- */
.eyebrow, .section-head span, .skills-title, .spec dt, .id-row dt,
.chip, .card-num, .card-badge, .card-meta, .card-link, .btn,
.contact-key, .theme-label, .site-nav a, .brand-name, .result-count,
.to-top, .footer-note, .site-footer p, #sort, #search, .figcaption {
  font-family: var(--font-mono);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1rem;
  padding: .85rem var(--pad);
  background: var(--paper);
  border-bottom: var(--border);
}

.brand { display: flex; align-items: center; gap: .6rem; }
.brand-mark {
  display: grid; place-items: center; width: 30px; height: 30px;
  background: var(--ink); color: var(--paper);
  font-family: var(--font-mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .02em;
}
.brand-name {
  font-size: .88rem; font-weight: 500; letter-spacing: -.01em;
}
.brand:hover .brand-mark { background: var(--accent); color: var(--accent-ink); }

.site-nav { margin-left: auto; display: flex; gap: 1.5rem; }
.site-nav a {
  font-size: .74rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .13em; color: var(--ink-2);
  padding-bottom: 2px; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }

.theme-toggle {
  border: var(--border); background: transparent; color: var(--ink);
  padding: .35rem .6rem; cursor: pointer;
  font-size: .68rem; font-weight: 500; text-transform: uppercase; letter-spacing: .12em;
}
.theme-toggle:hover { background: var(--ink); color: var(--paper); }

/* ---------- Layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }

.section { padding: clamp(3.5rem, 8vw, 6rem) 0 0; }

/* Label + rule running to the right edge */
.section-head {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1.75rem;
}
.section-head span {
  font-size: .76rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .2em; white-space: nowrap;
}
.section-head::after {
  content: ""; flex: 1; height: 0; border-top: var(--border);
}

.section-sub {
  color: var(--ink-2); margin: -.75rem 0 2rem; max-width: 60ch; font-size: .95rem;
}

/* ---------- Hero ---------- */
.hero { padding: clamp(3rem, 9vw, 6.5rem) 0 0; }

.eyebrow {
  margin: 0 0 1.5rem;
  font-size: .72rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .19em; color: var(--accent);
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(3.2rem, 15vw, 9rem);
  font-weight: 600;
  line-height: .88;
  letter-spacing: -.055em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.lede {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--ink-2); max-width: 54ch; margin: 0 0 2.25rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

.btn {
  display: inline-block; padding: .7rem 1.4rem;
  border: var(--border); background: transparent; color: var(--ink);
  font-size: .74rem; font-weight: 500; text-transform: uppercase; letter-spacing: .13em;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease, color .12s ease;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--offset) var(--offset) 0 var(--rule);
}
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* Spec strip: dividers between cells, no boxes */
.spec-strip {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: clamp(3rem, 7vw, 5rem) 0 0;
  border-top: var(--border); border-bottom: var(--border);
}
.spec { padding: 1.1rem 1.25rem; border-left: var(--hair); }
.spec:first-child { border-left: 0; padding-left: 0; }
.spec dt {
  font-size: .66rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .15em; color: var(--ink-3); margin-bottom: .35rem;
}
.spec dd {
  margin: 0; font-family: var(--font-mono); font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 600; line-height: 1; font-variant-numeric: tabular-nums;
  letter-spacing: -.03em;
}

/* ---------- About ---------- */
.identity {
  display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: stretch;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

/* Portrait slot */
.portrait { margin: 0; }
.portrait img {
  display: block; width: 100%; height: auto;
  border: var(--border);
}
.portrait figcaption {
  font-family: var(--font-mono); font-size: .66rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: .14em; color: var(--ink-3);
  padding-top: .6rem; border-top: var(--hair); margin-top: .6rem;
}

/* Placeholder shown until assets/portrait.jpg exists */
.portrait.is-empty::before {
  content: "Photo\A assets/portrait.jpg";
  white-space: pre;
  display: grid; place-content: center; text-align: center;
  aspect-ratio: 4 / 5;
  border: 2px dashed var(--rule-soft);
  background:
    repeating-linear-gradient(45deg,
      transparent 0 10px, var(--grid-line) 10px 20px);
  font-family: var(--font-mono); font-size: .7rem; line-height: 2;
  text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3);
}
.portrait.is-empty figcaption { display: none; }

/* Identity table: key/value rows, hairline separated. The rows distribute to
   match the portrait's height so the column doesn't end in dead space. */
.id-table {
  margin: 0; border-top: var(--border);
  display: flex; flex-direction: column; justify-content: space-between;
}
.id-row {
  display: grid; grid-template-columns: minmax(0, 7.5rem) minmax(0, 1fr);
  gap: 1rem; padding: .7rem 0; border-bottom: var(--hair);
  align-items: baseline;
}
.id-row dt {
  font-size: .66rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .15em; color: var(--ink-3); padding-top: .15rem;
}
.id-row dd { margin: 0; font-size: .95rem; }
.id-row dd a { border-bottom: 1px solid var(--accent); }
.id-row dd a:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.id-row .sep { color: var(--ink-3); margin: 0 .2rem; }

.status-dot {
  display: inline-block; width: 7px; height: 7px; margin-right: .55rem;
  background: var(--accent); vertical-align: middle;
  animation: blink 2.4s steps(1) infinite;
}
@keyframes blink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: .25; } }

.about-grid {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem); align-items: start;
}
.about-body { margin: 0; font-size: 1.02rem; color: var(--ink-2); max-width: 62ch; }
.about-body strong { color: var(--ink); font-weight: 600; }

.skills-title {
  font-size: .66rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .15em; color: var(--ink-3);
  padding-bottom: .6rem; border-bottom: var(--hair); margin-bottom: .9rem;
}
.tag-list { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.tag {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500;
  padding: .25rem .55rem; border: var(--hair); color: var(--ink-2);
}
.tag:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Controls ---------- */
.controls {
  display: flex; flex-wrap: wrap; align-items: stretch; gap: .5rem;
  margin-bottom: .9rem;
}
.search-wrap {
  display: flex; align-items: center; flex: 1 1 200px; min-width: 170px;
  border: var(--border); background: var(--surface);
}
.search-prefix {
  padding: 0 .5rem 0 .7rem; font-family: var(--font-mono);
  color: var(--accent); font-weight: 600;
}
#search {
  flex: 1; min-width: 0; padding: .6rem .7rem .6rem 0;
  border: 0; background: transparent; color: var(--ink);
  font-size: .82rem;
}
#search::placeholder { color: var(--ink-3); }
#search:focus { outline: none; }
.search-wrap:focus-within { border-color: var(--accent); }

.filters { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .5rem .75rem; cursor: pointer;
  border: var(--border); background: transparent; color: var(--ink-2);
  font-size: .68rem; font-weight: 500; text-transform: uppercase; letter-spacing: .1em;
}
.chip:hover { color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip .dot { width: 7px; height: 7px; }

.sort-wrap { margin-left: auto; display: flex; }
#sort {
  padding: .6rem 2rem .6rem .7rem;
  border: var(--border); background: var(--surface); color: var(--ink);
  font-size: .74rem; cursor: pointer; appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 17px) 55%, calc(100% - 12px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
#sort:focus { outline: none; border-color: var(--accent); }

.result-count {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .13em;
  color: var(--ink-3); margin: 0 0 1.5rem; min-height: 1.2em;
}

/* ---------- Project index ---------- */
.project-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(285px, 1fr));
}

.card {
  position: relative; display: flex; flex-direction: column;
  padding: 1.35rem;
  border: var(--border); background: var(--surface);
  min-height: 200px;
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease;
  animation: cardIn .3s ease both;
}
.card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--offset) var(--offset) 0 var(--rule);
  border-color: var(--accent);
}

@keyframes cardIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.card-head {
  display: flex; align-items: baseline; gap: .6rem;
  padding-bottom: .7rem; margin-bottom: .8rem; border-bottom: var(--hair);
}
.card-num {
  font-size: .68rem; font-weight: 500; color: var(--ink-3);
  font-variant-numeric: tabular-nums; flex-shrink: 0;
}
.card-title {
  font-size: 1rem; font-weight: 600; letter-spacing: -.015em;
  word-break: break-word;
}
.card-title a { border-bottom: 2px solid transparent; }
.card-title a:hover { border-bottom-color: var(--accent); }
.card-badge {
  margin-left: auto; flex-shrink: 0;
  font-size: .6rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em;
  padding: .18rem .42rem;
  background: var(--accent); color: var(--accent-ink);
}

.card-desc { color: var(--ink-2); font-size: .89rem; margin: 0 0 .9rem; flex: 1; }
.card-desc.is-placeholder { color: var(--ink-3); }

.card-role {
  font-size: .82rem; color: var(--ink-2); margin: 0 0 .9rem;
  padding-left: .8rem; border-left: 2px solid var(--accent);
}

.card-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: .35rem 1rem;
  font-size: .66rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--ink-3); margin-bottom: 1.1rem;
}
.card-meta span { display: inline-flex; align-items: center; gap: .4rem; }
.lang-dot { width: 7px; height: 7px; flex-shrink: 0; }

.card-links { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: auto; }
.card-link {
  padding: .45rem .8rem; border: var(--hair); color: var(--ink-2);
  font-size: .66rem; font-weight: 500; text-transform: uppercase; letter-spacing: .11em;
}
.card-link:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.card-link.primary { border: var(--border); color: var(--ink); }
.card-link.primary:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* Featured entry leads and takes two columns where there's room */
.card.is-featured { border-color: var(--accent); }
@media (min-width: 700px) {
  .card.is-featured { grid-column: span 2; }
  .card.is-featured .card-title { font-size: 1.25rem; }
  .card.is-featured .card-desc { font-size: .96rem; max-width: 62ch; }
}

/* Skeletons */
.card.skeleton { border-color: var(--rule-soft); animation: pulse 1.3s ease-in-out infinite; }
.card.skeleton::after {
  content: ""; position: absolute; inset: 1.35rem;
  background:
    linear-gradient(var(--paper-2) 0 0) 0 0 / 45% 14px no-repeat,
    linear-gradient(var(--paper-2) 0 0) 0 32px / 100% 10px no-repeat,
    linear-gradient(var(--paper-2) 0 0) 0 48px / 75% 10px no-repeat,
    linear-gradient(var(--paper-2) 0 0) 0 100% / 55% 28px no-repeat;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }

.empty-state, .error-state {
  padding: 2rem 1.25rem; color: var(--ink-2); font-size: .9rem;
  border: 2px dashed var(--rule-soft);
}
.error-state { border-color: var(--accent); }

/* ---------- Contact ---------- */
.contact-list { list-style: none; margin: 0; padding: 0; border-top: var(--border); }
.contact-row {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.1rem .25rem; border-bottom: var(--hair);
}
.contact-key {
  font-size: .66rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .15em; color: var(--ink-3);
  flex: 0 0 7.5rem;
}
.contact-val { font-size: .98rem; min-width: 0; overflow-wrap: anywhere; }
.contact-arrow { margin-left: auto; color: var(--ink-3); transition: transform .14s ease, color .14s ease; }
.contact-row:hover { background: var(--surface); }
.contact-row:hover .contact-arrow { transform: translateX(5px); color: var(--accent); }
.contact-row:hover .contact-val { color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--maxw); margin: clamp(4rem, 9vw, 6rem) auto 0;
  padding: 1.4rem var(--pad) 2.5rem;
  border-top: var(--border);
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  font-size: .68rem; text-transform: uppercase; letter-spacing: .12em;
  color: var(--ink-3);
}
.site-footer p { margin: 0; }
.footer-note { color: var(--ink-3); }
.to-top {
  margin-left: auto; padding: .4rem .7rem; cursor: pointer;
  border: var(--hair); background: transparent; color: var(--ink-2);
  font-size: .66rem; text-transform: uppercase; letter-spacing: .12em;
}
.to-top:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .identity { grid-template-columns: minmax(0, 1fr); }
  .portrait { max-width: 300px; }
  .about-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 620px) {
  .site-nav { display: none; }
  .brand-name { display: none; }
  .theme-toggle { margin-left: auto; }
  .spec-strip { grid-template-columns: minmax(0, 1fr); }
  .spec { border-left: 0; border-top: var(--hair); padding-left: 0; padding-right: 0; }
  .spec:first-child { border-top: 0; }
  .sort-wrap { margin-left: 0; width: 100%; }
  #sort { width: 100%; }
  .id-row { grid-template-columns: minmax(0, 1fr); gap: .2rem; }
  .contact-key { flex-basis: 5rem; }
  .site-footer { flex-direction: column; align-items: flex-start; }
  .to-top { margin-left: 0; }
}

/* ---------- Motion / print ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

@media print {
  .site-header, .controls, .to-top { display: none; }
  body { background: #fff; color: #000; }
  .card { break-inside: avoid; }
}