/* ==========================================================================
   Hussain Yisa portfolio
   Design notes: a case-file look for a criminology + cybersecurity story.
   Black and white. White is the accent colour.
   Edit the colours and fonts in :root below.
   ========================================================================== */

/* Black theme with white accents. Change these values to recolour the whole site. */
:root {
  color-scheme: dark;

  --paper: #000000;      /* page background */
  --surface: #0E0E0E;    /* panels and chips */
  --ink: #FFFFFF;        /* main text */
  --steel: #A3A3A3;      /* quieter text */
  --line: #2A2A2A;       /* thin dividers */
  --accent: #FFFFFF;     /* highlight colour */
  --on-accent: #000000;  /* text that sits on the highlight */
  --bar: #FFFFFF;        /* redaction bars */
  --link: #FFFFFF;

  --font-display: "Bricolage Grotesque", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --gutter: clamp(1.25rem, 5vw, 4rem);
  --max: 68rem;
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
}

h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }

a { color: var(--link); text-underline-offset: 0.2em; }

:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

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

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 2rem;
  padding: 1rem var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 48rem) {
  .site-header {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
}

.nav a:hover { border-bottom-color: var(--accent); }

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

.hero {
  padding-block: clamp(3rem, 9vw, 7rem) clamp(3.5rem, 8vw, 6rem);
}

.hero-grid {
  display: grid;
  gap: 3rem;
}

@media (min-width: 56rem) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: end;
    gap: 4rem;
  }
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.75rem, 12vw, 8.5rem);
  line-height: 0.9;
  letter-spacing: -0.035em;
}

.hero h1 span { display: block; }

.lede {
  max-width: 40rem;
  margin-top: 2rem;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.5;
}

/* The one memorable moment: key phrases start redacted, then the bars lift. */
.redact {
  padding-inline: 0.15em;
  margin-inline: -0.15em;
  background-image: linear-gradient(var(--bar), var(--bar));
  background-repeat: no-repeat;
  background-position: left center;
  background-size: 0% 100%;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  animation: lift 0.55s cubic-bezier(0.6, 0, 0.2, 1) both;
}

.redact:nth-of-type(1) { animation-delay: 0.6s; }
.redact:nth-of-type(2) { animation-delay: 0.95s; }
.redact:nth-of-type(3) { animation-delay: 1.3s; }

@keyframes lift {
  from { background-size: 100% 100%; }
  to   { background-size: 0% 100%; }
}

/* Pressing "Redact" puts the bars back. Higher specificity beats the animation. */
.lede.is-redacted .redact {
  animation: none;
  background-size: 100% 100%;
}

@media (prefers-reduced-motion: reduce) {
  .redact { animation: none; }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.4rem;
  border: 2px solid var(--ink);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

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

.redact-toggle {
  padding: 0.4rem 0.2rem;
  border: 0;
  background: none;
  color: var(--steel);
  font: inherit;
  font-size: 0.95rem;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}
.redact-toggle:hover { color: var(--ink); }
.redact-toggle[hidden] { display: none; }

.hero-side {
  display: grid;
  gap: 1.5rem;
}

.hero-art { margin: 0; }

.hero-art img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.file-summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 0.5rem solid var(--accent);
  padding: 1.5rem;
}

.file-summary div + div {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.file-summary dt {
  color: var(--steel);
  font-size: 0.9rem;
}

.file-summary dd {
  margin-top: 0.15rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.25;
}

/* ---------- Sections ---------- */

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

.section h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.split {
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 56rem) {
  .split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: 4rem;
  }
}

.prose { max-width: 38rem; }
.prose p + p { margin-top: 1.1rem; }

/* ---------- Skills ---------- */

.skills {
  display: grid;
  gap: 2.5rem 2rem;
  margin-top: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.skill-group h3 {
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
}

.skill-group li {
  padding-block: 0.6rem;
  border-bottom: 1px solid var(--line);
}

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

.exhibits { margin-top: 2.5rem; }

.exhibit {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 1.25rem;
  padding-block: 2rem;
  border-top: 1px solid var(--line);
}

@media (min-width: 40rem) {
  .exhibit { grid-template-columns: 4.5rem minmax(0, 1fr); gap: 2rem; }
}

.exhibit:last-child { border-bottom: 1px solid var(--line); }

/* Evidence-marker tent shape */
.marker {
  display: grid;
  place-items: end center;
  width: 3.5rem;
  height: 3.5rem;
  padding-bottom: 0.45rem;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  clip-path: polygon(12% 0, 88% 0, 100% 100%, 0 100%);
}

@media (min-width: 40rem) {
  .marker { width: 4.5rem; height: 4.5rem; font-size: 1.9rem; }
}

.exhibit-body { max-width: 40rem; }

.exhibit h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.6rem;
  line-height: 1.2;
}

.exhibit-body > p { margin-top: 0.6rem; }

.sample {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  border: 1px dashed var(--steel);
  color: var(--steel);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.8rem;
  vertical-align: middle;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.tags li {
  padding: 0.15rem 0.6rem;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 0.875rem;
}

.exhibit .links { margin-top: 1rem; font-weight: 600; }

/* ---------- Education ---------- */

.path > div {
  display: grid;
  gap: 0.25rem 2rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--line);
}

.path > div:last-child { border-bottom: 1px solid var(--line); }

@media (min-width: 40rem) {
  .path > div { grid-template-columns: 8rem minmax(0, 1fr); }
}

.path dt { color: var(--steel); }

.path dd strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  line-height: 1.25;
}

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

.contact-lead { max-width: 32rem; font-size: 1.2rem; }

.email {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 4vw, 2.1rem);
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.2em;
  text-underline-offset: 0.15em;
  overflow-wrap: anywhere;
}
.email:hover { color: var(--link); }

.social-title {
  margin-top: 3rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
}

.socials { margin-top: 0.75rem; max-width: 34rem; }

.socials li { border-bottom: 1px solid var(--line); }
.socials li:first-child { border-top: 1px solid var(--line); }

.socials a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0.25rem;
  color: var(--ink);
  text-decoration: none;
  transition: background-color 0.15s, padding 0.15s;
}

.socials a span:first-child { font-weight: 600; }
.socials a span:last-child { color: var(--steel); overflow-wrap: anywhere; text-align: right; }

.socials a:hover {
  background: var(--surface);
  padding-inline: 0.75rem;
}

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

.site-footer {
  padding-block: 2rem;
  border-top: 1px solid var(--line);
  color: var(--steel);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

/* ---------- 404 page ---------- */

.not-found {
  min-height: 70vh;
  display: grid;
  align-content: center;
  gap: 1.25rem;
  padding-block: 4rem;
}

.not-found h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.not-found p { max-width: 30rem; }
.not-found .btn { justify-self: start; }

/* ==========================================================================
   Interactive layer
   Everything below is progressive: the page reads fine without it, and each
   moving part switches itself off for people who prefer reduced motion.
   ========================================================================== */

/* ---------- Scroll progress bar ---------- */

.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 4px;
  z-index: 30;
  pointer-events: none;
}

.progress span {
  display: block;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
}

/* ---------- Hero network canvas ---------- */

.hero {
  position: relative;
  overflow: hidden;
}

.hero .wrap {
  position: relative;
  z-index: 1;
}

.net {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ---------- Hero image: tilt and click to change ---------- */

.hero-art-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transition: transform 0.15s ease-out;
  will-change: transform;
}

.hero-art img { transition: opacity 0.18s, scale 0.18s; }
.hero-art img.swap { opacity: 0; scale: 0.97; }

.hero-art figcaption {
  margin-top: 0.5rem;
  color: var(--steel);
  font-size: 0.875rem;
}

/* ---------- Reveal on scroll ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

/* ---------- Hover details ---------- */

.skill-group li {
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 100%;
  transition: background-size 0.3s ease, color 0.3s ease, padding 0.3s ease;
}

.skill-group li:hover {
  background-size: 100% 100%;
  padding-left: 0.75rem;
  color: var(--on-accent);
}

.marker {
  transform-origin: bottom center;
  transition: transform 0.25s cubic-bezier(0.3, 1.6, 0.5, 1);
}

.exhibit:hover .marker { transform: rotate(-7deg) translateY(-4px); }

.tags li { transition: background-color 0.2s, border-color 0.2s, color 0.2s; }
.exhibit:hover .tags li {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

/* ---------- Terminal ---------- */

.term-note { margin-top: 1rem; max-width: 20rem; color: var(--steel); }

.term-note code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.1rem 0.35rem;
  background: var(--surface);
  border: 1px solid var(--line);
}

.term {
  background: #0A0A0A;
  color: #E6E6E6;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.55;
  max-width: 42rem;
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  background: #161616;
  color: #9A9A9A;
  font-size: 0.8rem;
}

.term-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: #444444;
}
.term-dot:first-child { background: var(--accent); }

.term-title { margin-left: 0.5rem; }

.term-screen {
  height: 20rem;
  padding: 1rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.term-line {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.term-cmd { color: #FFFFFF; }
.term-muted { color: #9A9A9A; }
.term-line a { color: #FFFFFF; }

.term-form {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  border-top: 1px solid #2A2A2A;
}

.term-form:focus-within {
  outline: 3px solid var(--link);
  outline-offset: -3px;
}

.term-prompt { color: #FFFFFF; }

.term-form input {
  flex: 1;
  min-width: 0;
  padding: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 1rem;
}

.term-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.25rem 1rem 1rem;
}

.term-chips button {
  padding: 0.3rem 0.7rem;
  border: 1px solid #444444;
  background: transparent;
  color: #E6E6E6;
  font: inherit;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.term-chips button:hover {
  background: #FFFFFF;
  border-color: #FFFFFF;
  color: #000000;
}

/* ---------- Reduced motion: switch the movement off ---------- */

@media (prefers-reduced-motion: reduce) {
  .marker,
  .skill-group li,
  .hero-art-btn,
  .hero-art img { transition: none; }
  .exhibit:hover .marker { transform: none; }
}

/* ---------- Role line under the name, and status chip ---------- */

.role {
  margin-top: 1.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  line-height: 1.3;
}

.role a {
  color: var(--ink);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.18em;
  text-underline-offset: 0.2em;
  transition: color 0.15s;
}
.role a:hover { color: var(--link); }

.status {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  vertical-align: middle;
}