/* ==========================================================================
   Amiir Haamzah — portfolio
   Visual idea: the page borrows the vocabulary of an annotation tool.
   Corner brackets, class-coloured label chips, monospace confidence scores.
   Everything else stays quiet so the frames do the talking.
   ========================================================================== */

/* --- Tokens -------------------------------------------------------------- */
:root {
  /* surface */
  --paper:      #EDF0F2;
  --paper-lift: #F7F9FA;
  --ink:        #0D1B24;
  --ink-2:      #2A3D49;
  --muted:      #5F7480;
  --line:       rgba(13, 27, 36, .13);
  --line-2:     rgba(13, 27, 36, .07);

  /* class colours — used only in chips, swatches and frame strokes */
  --c-hse:      #E24A1E;
  --c-road:     #6248D0;
  --c-drone:    #0A8C93;
  --c-llm:      #A87400;

  /* fit strengths */
  --s-direct:   #0A8C93;
  --s-adjacent: #A87400;
  --s-learning: #6248D0;

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

  /* scale */
  --wrap: 74rem;
  --gut: clamp(1.25rem, 4vw, 3rem);
  --r: 3px;
}

/* --- Reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(1rem, .96rem + .2vw, 1.0625rem);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { font-family: var(--display); font-weight: 750; line-height: 1.02; margin: 0; letter-spacing: -.02em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }

:focus-visible {
  outline: 2.5px solid var(--c-hse);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 99;
  background: var(--ink); color: var(--paper);
  padding: .75rem 1.25rem; font-family: var(--mono); font-size: .8rem;
}
.skip-link:focus { left: 0; }

.wrap { width: min(100% - (var(--gut) * 2), var(--wrap)); margin-inline: auto; }
.sep { color: var(--muted); opacity: .5; margin: 0 .5em; }

/* --- Topbar -------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.topbar.is-stuck { border-bottom-color: var(--line); }

.topbar__inner {
  width: min(100% - (var(--gut) * 2), var(--wrap));
  margin-inline: auto;
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 4.25rem;
}

.mark {
  position: relative; text-decoration: none;
  font-family: var(--mono); font-size: .78rem; font-weight: 700;
  letter-spacing: .04em; white-space: nowrap;
  padding: .3rem .55rem; flex: 0 0 auto;
}
.mark__brackets { position: absolute; inset: 0; }
.mark__brackets::before, .mark__brackets::after {
  content: ""; position: absolute; width: 7px; height: 7px;
  border: 1.5px solid var(--c-hse);
}
.mark__brackets::before { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.mark__brackets::after  { bottom: 0; right: 0; border-left: 0; border-top: 0; }

.nav { display: flex; gap: 1.35rem; margin-left: auto; }
.nav a {
  text-decoration: none; font-size: .875rem; color: var(--muted);
  padding: .25rem 0; position: relative; transition: color .18s ease;
}
.nav a:hover { color: var(--ink); }
.nav a.is-active { color: var(--ink); font-weight: 600; }
.nav a.is-active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--c-hse);
}

.switcher { display: flex; align-items: center; gap: .6rem; flex: 0 0 auto; }
.switcher__label {
  font-family: var(--mono); font-size: .66rem; text-transform: uppercase;
  letter-spacing: .12em; color: var(--muted);
}
.switcher__control { position: relative; display: flex; align-items: center; }
.switcher__control select {
  appearance: none; -webkit-appearance: none;
  font-family: var(--mono); font-size: .74rem; font-weight: 500;
  color: var(--ink); background: transparent;
  border: 1px solid var(--line); border-radius: var(--r);
  padding: .4rem 1.85rem .4rem .6rem;
  cursor: pointer; max-width: 13rem;
  text-overflow: ellipsis;
}
.switcher__control select:hover { border-color: var(--ink); }
.switcher__chev {
  position: absolute; right: .6rem; width: 9px; pointer-events: none; color: var(--muted);
}

@media (max-width: 900px) { .nav { display: none; } }
@media (max-width: 560px) {
  .switcher__label { display: none; }
  .switcher { margin-left: auto; }
  .switcher__control select { max-width: 10rem; }
}

/* --- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .78rem; font-weight: 500;
  letter-spacing: .01em; text-decoration: none;
  padding: .7rem 1.1rem;
  border: 1px solid var(--ink); border-radius: var(--r);
  background: transparent; color: var(--ink);
  transition: background .16s ease, color .16s ease, transform .16s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:active { transform: translateY(1px); }
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--c-hse); border-color: var(--c-hse); color: #fff; }
.btn--ghost { border-color: var(--line); color: var(--muted); }
.btn--ghost:hover { border-color: var(--ink); background: transparent; color: var(--ink); }
.btn--block { display: flex; justify-content: center; width: 100%; }
.btn--invert { border-color: rgba(237,240,242,.35); color: var(--paper); }
.btn--invert:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn--solid.btn--invert { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn--solid.btn--invert:hover { background: var(--c-hse); border-color: var(--c-hse); color: #fff; }
.is-hidden { display: none !important; }

/* --- The signature: annotation frame ------------------------------------- */
.frame {
  position: relative;
  padding: clamp(2rem, 5vw, 3.25rem) clamp(1.25rem, 4vw, 3rem);
}
.frame::before, .frame::after {
  content: ""; position: absolute; width: clamp(20px, 4vw, 34px); height: clamp(20px, 4vw, 34px);
  border: 2px solid var(--c-hse); pointer-events: none;
}
.frame::before { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.frame::after  { bottom: 0; right: 0; border-left: 0; border-top: 0; }

.frame__chip {
  position: absolute; top: -.85rem; left: clamp(1.25rem, 4vw, 3rem);
  display: inline-flex; align-items: center; gap: .45rem;
  background: var(--c-hse); color: #fff;
  font-family: var(--mono); font-size: .66rem; font-weight: 500;
  letter-spacing: .06em; padding: .28rem .6rem; border-radius: 2px;
  white-space: nowrap;
}
.frame__chip b { font-weight: 700; opacity: .82; }
.frame__dot {
  width: 5px; height: 5px; border-radius: 50%; background: #fff;
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) { .frame__dot { animation: none; } }

/* page-load draw-in */
[data-frame]::before, [data-frame]::after { animation: bracketIn .7s .1s cubic-bezier(.2,.8,.2,1) backwards; }
@keyframes bracketIn { from { opacity: 0; transform: scale(.5); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { [data-frame]::before, [data-frame]::after { animation: none; } }

/* --- Hero ---------------------------------------------------------------- */
.hero { padding: clamp(3rem, 8vw, 6.5rem) 0 0; }

.hero__eyebrow {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted); margin: 0 0 1.25rem;
}
.hero__title {
  font-size: clamp(2.6rem, 9.5vw, 6.2rem);
  font-weight: 800; letter-spacing: -.035em; line-height: .95;
  font-variation-settings: "wdth" 92;
  margin: 0 0 1.75rem; max-width: 15ch;
}
.hero__title span { display: block; }
.hero__title span:last-child { color: var(--muted); }

.hero__intro {
  font-size: clamp(1.05rem, .98rem + .45vw, 1.3rem);
  line-height: 1.55; max-width: 56ch; color: var(--ink-2); margin-bottom: 2rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: .65rem; }

/* stats */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  background: var(--line); border-block: 1px solid var(--line);
}
.stats > div { background: var(--paper); padding: 1.5rem 1.25rem 1.5rem 0; }
.stats dt {
  font-family: var(--display); font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800; letter-spacing: -.04em; line-height: 1;
}
.stats dd {
  margin: .5rem 0 0; font-size: .8rem; line-height: 1.4; color: var(--muted);
  max-width: 22ch;
}
@media (max-width: 760px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats > div { padding: 1.15rem 1rem 1.15rem 0; }
}

/* --- Sections ------------------------------------------------------------ */
.section { padding: clamp(3.5rem, 9vw, 7rem) 0; }
.section + .section { border-top: 1px solid var(--line-2); }
.section--pitch { background: var(--paper-lift); border-top: 1px solid var(--line); }

.sechead { max-width: 62ch; margin-bottom: clamp(2rem, 5vw, 3.25rem); }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 1rem;
}
.sw { width: 9px; height: 9px; border-radius: 1px; display: inline-block; flex: 0 0 auto; }
.sw--hse { background: var(--c-hse); }
.sw--road { background: var(--c-road); }
.sw--drone { background: var(--c-drone); }
.sw--llm { background: var(--c-llm); }
.sw--direct { background: var(--s-direct); }
.sw--adjacent { background: var(--s-adjacent); }
.sw--learning { background: var(--s-learning); }

.sechead__title {
  font-size: clamp(1.75rem, 4.2vw, 2.9rem); letter-spacing: -.03em;
  font-variation-settings: "wdth" 95;
}
.sechead__meta { margin: 1rem 0 0; color: var(--muted); font-size: 1rem; }

/* --- Pitch --------------------------------------------------------------- */
.pitch {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 4rem); align-items: start;
  margin-bottom: clamp(3rem, 7vw, 5rem);
}
.pitch__body p {
  font-size: clamp(1rem, .96rem + .3vw, 1.16rem);
  line-height: 1.62; color: var(--ink-2); margin-bottom: 1.15em;
}
.pitch__body p:first-child::first-letter {
  font-family: var(--display); font-weight: 800; font-size: 3.1em;
  float: left; line-height: .82; padding: .06em .12em 0 0; color: var(--ink);
}
.pitch__side { position: sticky; top: 6rem; }
@media (max-width: 900px) {
  .pitch { grid-template-columns: 1fr; }
  .pitch__side { position: static; }
}

.facts { border-top: 1px solid var(--line); margin-bottom: 1.25rem; }
.facts li { border-bottom: 1px solid var(--line); padding: .85rem 0; }
.facts dt, .facts .facts__k {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .11em;
  text-transform: uppercase; color: var(--muted); display: block; margin-bottom: .3rem;
}
.facts .facts__v { font-size: .95rem; font-weight: 500; }

/* --- Fit table ----------------------------------------------------------- */
.fit__head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 1rem; padding-bottom: 1rem; border-bottom: 2px solid var(--ink);
}
.fit__title { font-size: clamp(1.15rem, 2.2vw, 1.5rem); letter-spacing: -.02em; }
.legend { display: flex; flex-wrap: wrap; gap: 1rem; }
.legend li {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: var(--mono); font-size: .68rem; color: var(--muted); letter-spacing: .03em;
}

.fit__list { counter-reset: fit; }
.fit__row {
  display: grid; grid-template-columns: 2.5rem minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(1rem, 3vw, 2.25rem);
  padding: 1.4rem 0; border-bottom: 1px solid var(--line-2);
  align-items: start;
}
.fit__row:hover { background: color-mix(in srgb, var(--ink) 2.5%, transparent); }
.fit__num {
  counter-increment: fit; font-family: var(--mono); font-size: .7rem;
  color: var(--muted); padding-top: .28rem;
}
.fit__num::before { content: counter(fit, decimal-leading-zero); }
.fit__req { font-weight: 600; font-size: .97rem; line-height: 1.45; }
.fit__ev { color: var(--ink-2); font-size: .94rem; line-height: 1.6; }
.fit__tag {
  display: inline-flex; align-items: center; gap: .38rem;
  font-family: var(--mono); font-size: .62rem; letter-spacing: .09em;
  text-transform: uppercase; margin-top: .6rem;
  padding: .2rem .45rem; border-radius: 2px;
  border: 1px solid currentColor;
}
.fit__tag--direct { color: var(--s-direct); }
.fit__tag--adjacent { color: var(--s-adjacent); }
.fit__tag--learning { color: var(--s-learning); }

@media (max-width: 780px) {
  .fit__row { grid-template-columns: 2rem minmax(0, 1fr); gap: .75rem 1rem; }
  .fit__ev { grid-column: 2; }
}

/* --- Domain cards -------------------------------------------------------- */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
}
.card {
  position: relative; background: var(--paper);
  padding: 1.6rem 1.5rem 1.5rem;
  transition: background .2s ease;
}
.card:hover { background: var(--paper-lift); }
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--card-c); transform: scaleX(0); transform-origin: left;
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.card:hover::before { transform: scaleX(1); }
.card__code {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .1em;
  color: #fff; background: var(--card-c);
  padding: .18rem .45rem; border-radius: 2px; display: inline-block; margin-bottom: .9rem;
}
.card__name { font-size: 1.22rem; letter-spacing: -.02em; margin-bottom: .6rem; }
.card__summary { font-size: .92rem; color: var(--ink-2); line-height: 1.58; margin-bottom: 1rem; }
.card__tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.card__tags li {
  font-family: var(--mono); font-size: .64rem; color: var(--muted);
  border: 1px solid var(--line); padding: .18rem .4rem; border-radius: 2px;
}

.geo { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-top: 1.75rem; }
.geo__label {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted);
}
.geo__list { display: flex; flex-wrap: wrap; gap: .4rem; }
.geo__list li {
  font-family: var(--mono); font-size: .72rem;
  border: 1px solid var(--ink); padding: .22rem .55rem; border-radius: 2px;
}

/* --- Timeline ------------------------------------------------------------ */
.timeline { border-top: 1px solid var(--line); }
.job {
  display: grid; grid-template-columns: 13rem minmax(0, 1fr);
  gap: clamp(1rem, 4vw, 3rem);
  padding: clamp(1.75rem, 4vw, 2.5rem) 0;
  border-bottom: 1px solid var(--line);
}
.job__when { position: relative; }
.job__period {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .02em;
  color: var(--muted); display: block;
}
.job__now {
  display: inline-flex; align-items: center; gap: .35rem;
  font-family: var(--mono); font-size: .62rem; text-transform: uppercase;
  letter-spacing: .1em; color: var(--c-hse); margin-top: .5rem;
}
.job__now i { width: 5px; height: 5px; border-radius: 50%; background: var(--c-hse); animation: pulse 2.6s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) { .job__now i { animation: none; } }
.job__loc { display: block; font-size: .78rem; color: var(--muted); margin-top: .5rem; }

.job__role { font-size: clamp(1.2rem, 2.4vw, 1.55rem); letter-spacing: -.02em; }
.job__org {
  font-family: var(--mono); font-size: .78rem; color: var(--muted);
  margin: .4rem 0 .9rem; display: block;
}
.job__summary { font-size: .97rem; color: var(--ink-2); margin-bottom: 1rem; }
.job__points li {
  position: relative; padding-left: 1.35rem; margin-bottom: .6rem;
  font-size: .93rem; line-height: 1.58; color: var(--ink-2);
}
.job__points li::before {
  content: ""; position: absolute; left: 0; top: .58em;
  width: 6px; height: 6px; border: 1.5px solid var(--muted);
}
@media (max-width: 720px) { .job { grid-template-columns: 1fr; gap: .9rem; } }

/* --- Publications -------------------------------------------------------- */
.pubs { border-top: 1px solid var(--line); margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.pub {
  display: grid; grid-template-columns: 2.75rem minmax(0, 1fr) auto;
  gap: 1rem; align-items: baseline;
  padding: 1.15rem 0; border-bottom: 1px solid var(--line);
}
.pub__n { font-family: var(--mono); font-size: .7rem; color: var(--muted); }
.pub__title { font-size: .99rem; font-weight: 500; line-height: 1.45; }
.pub__title a { text-decoration-color: var(--line); text-underline-offset: 3px; }
.pub__note {
  font-family: var(--mono); font-size: .66rem; color: var(--muted);
  letter-spacing: .04em; white-space: nowrap;
}
@media (max-width: 720px) {
  .pub { grid-template-columns: 2rem minmax(0, 1fr); }
  .pub__note { grid-column: 2; white-space: normal; }
}

/* --- Education / awards / skills ----------------------------------------- */
.twocol {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: clamp(1.75rem, 5vw, 3.5rem);
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.block__title {
  font-family: var(--mono); font-size: .7rem; font-weight: 700;
  letter-spacing: .13em; text-transform: uppercase; color: var(--muted);
  padding-bottom: .65rem; border-bottom: 1px solid var(--ink); margin-bottom: 1rem;
}
.block__title--sub { margin-top: 2rem; }

.edu li { padding: .85rem 0; border-bottom: 1px solid var(--line-2); }
.edu__q { font-weight: 600; font-size: .96rem; line-height: 1.4; display: block; }
.edu__i { font-size: .87rem; color: var(--ink-2); display: block; margin-top: .2rem; }
.edu__p { font-family: var(--mono); font-size: .7rem; color: var(--muted); display: block; margin-top: .35rem; }
.edu__note {
  display: inline-block; margin-top: .4rem; font-size: .72rem;
  font-family: var(--mono); color: var(--c-drone);
  border: 1px solid currentColor; padding: .12rem .38rem; border-radius: 2px;
}
.plain li { padding: .6rem 0; border-bottom: 1px solid var(--line-2); font-size: .93rem; }

.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1.5rem; }
.skillgroup__title {
  font-family: var(--display); font-size: 1.05rem; font-weight: 750;
  margin-bottom: .8rem; letter-spacing: -.01em;
}
.skillgroup__items { display: flex; flex-wrap: wrap; gap: .35rem; }
.skillgroup__items li {
  font-family: var(--mono); font-size: .72rem;
  background: var(--paper-lift); border: 1px solid var(--line);
  padding: .28rem .5rem; border-radius: 2px;
}

/* --- Contact ------------------------------------------------------------- */
.section--contact { background: var(--ink); color: var(--paper); border-top: 0; }
.section--contact .frame::before,
.section--contact .frame::after { border-color: var(--paper); }
.frame__chip--invert { background: var(--paper); color: var(--ink); }
.frame__chip--invert .frame__dot { background: var(--c-hse); }
.contact__title {
  font-size: clamp(2.2rem, 6vw, 4rem); letter-spacing: -.035em;
  font-variation-settings: "wdth" 92; margin-bottom: 1rem;
}
.contact__body { max-width: 48ch; color: color-mix(in srgb, var(--paper) 78%, transparent); font-size: 1.08rem; }
.contact__links { display: flex; flex-wrap: wrap; gap: .65rem; margin: 1.75rem 0 2rem; }
.contact__meta {
  font-family: var(--mono); font-size: .76rem;
  color: color-mix(in srgb, var(--paper) 62%, transparent); margin: 0;
}

/* --- Footer -------------------------------------------------------------- */
.foot { background: var(--ink); color: color-mix(in srgb, var(--paper) 55%, transparent); }
.foot__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem;
  padding: 1.5rem 0; border-top: 1px solid rgba(237,240,242,.14);
  font-family: var(--mono); font-size: .7rem; letter-spacing: .03em;
}

/* --- Scroll reveal ------------------------------------------------------- */
/* Gated behind .has-reveal, which JS adds only when it will actually animate.
   Both rules carry the same prefix so specificity stays predictable. */
html.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
}
html.has-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity .55s ease, transform .55s cubic-bezier(.2,.8,.2,1);
}
@media (prefers-reduced-motion: reduce) {
  html.has-reveal [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* --- Print --------------------------------------------------------------- */
@media print {
  .topbar, .hero__actions, .contact__links, .skip-link, .pitch__side .btn { display: none !important; }
  body { background: #fff; font-size: 10.5pt; line-height: 1.42; }
  .section, .hero { padding: 1.2rem 0; break-inside: avoid; }
  .section--contact, .foot { background: #fff; color: #000; }
  .section--contact .frame::before, .section--contact .frame::after { border-color: #000; }
  .frame__chip { background: #000 !important; color: #fff !important; }
  .hero__title { font-size: 30pt; }
  .card, .job, .fit__row, .pub { break-inside: avoid; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 7pt; color: #555; }
}