/* ============================================================
   Inoyatullo Musayev — portfolio
   Light-first, with a dark counterpart driven entirely by tokens.
   ============================================================ */

/* --- tokens -------------------------------------------------- */
:root {
  --paper: #F1F2EE;
  --panel: #FBFCFA;
  --sunken: #E7E9E3;

  --ink: #0F1417;
  --ink-2: #3B4448;
  --muted: #6E7772;

  --line: #D6D9D1;
  --line-strong: #B7BCB4;

  --accent: #B23A22;
  --accent-wash: rgb(178 58 34 / 9%);

  --rim: rgb(255 255 255 / 95%);
  --shadow: rgb(15 20 23 / 9%);

  --band: #12171A;
  --band-ink: #F1F2EE;
  --band-muted: #8C9691;
  --specular: rgb(255 255 255 / 10%);

  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --page: 1180px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --nav-height: 78px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* The dark palette applies on an explicit choice, or on system dark
   unless the viewer has explicitly asked for light. */
:root:not([data-theme="light"]) {
  @media (prefers-color-scheme: dark) {
    --paper: #0F1112;
    --panel: #171A1B;
    --sunken: #1C201F;

    --ink: #E9EBE7;
    --ink-2: #C0C5C0;
    --muted: #8B928D;

    --line: #282D2D;
    --line-strong: #3D4342;

    --accent: #E4704F;
    --accent-wash: rgb(228 112 79 / 13%);

    --rim: rgb(255 255 255 / 7%);
    --shadow: rgb(0 0 0 / 50%);

    --band: #E7E9E3;
    --band-ink: #0F1417;
    --band-muted: #5D6662;
    --specular: rgb(15 20 23 / 7%);
  }
}

:root[data-theme="dark"] {
  --paper: #0F1112;
  --panel: #171A1B;
  --sunken: #1C201F;

  --ink: #E9EBE7;
  --ink-2: #C0C5C0;
  --muted: #8B928D;

  --line: #282D2D;
  --line-strong: #3D4342;

  --accent: #E4704F;
  --accent-wash: rgb(228 112 79 / 13%);

  --rim: rgb(255 255 255 / 7%);
  --shadow: rgb(0 0 0 / 50%);

  --band: #E7E9E3;
  --band-ink: #0F1417;
  --band-muted: #5D6662;
  --specular: rgb(15 20 23 / 7%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* A grain plate so the flat ground reads as a surface. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.45;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23g)' opacity='.045'/%3E%3C/svg%3E");
}

.nav,
main,
.footer { position: relative; z-index: 1; }

p, h1, h2, h3, h4 { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }

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

/* --- utilities ----------------------------------------------- */
.wrap {
  width: min(var(--page), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.label {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.skip {
  position: absolute;
  top: 0;
  left: -9999px;
  z-index: 100;
  padding: 0.7rem 1.1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }

.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 99;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.1s linear;
}

/* --- navigation ---------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--paper) 84%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}

.nav__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: var(--nav-height);
}

.nav__name {
  font-family: var(--display);
  font-size: clamp(1.15rem, 1.7vw, 1.46rem);
  font-weight: 800;
  font-stretch: 86%;
  letter-spacing: -0.032em;
  text-decoration: none;
  white-space: nowrap;
}

.nav__links { display: flex; gap: 2.1rem; }

.nav__links a {
  position: relative;
  padding-block: 0.5rem;
  font-family: var(--mono);
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-2);
  transition: color 0.3s var(--ease);
}

.nav__links a::after {
  content: "";
  position: absolute;
  inset: auto 0 0.2rem 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease);
}

.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after,
.nav__links a.is-current::after {
  transform: scaleX(1);
  transform-origin: left;
}
.nav__links a.is-current { color: var(--accent); }

.nav__mobile { display: none; }

/* --- hero ----------------------------------------------------- */
/* Sized so the marquee below always peeks into the first screen. */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--nav-height) - 3.4rem);
  padding-block: clamp(3rem, 7vh, 5rem);
}

.hero__eyebrow {
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
  opacity: 0;
  animation: fade-in 0.8s var(--ease) 0.1s forwards;
}

.hero__title {
  max-width: 24ch;
  font-family: var(--display);
  font-size: clamp(2.3rem, 6.4vw, 5.4rem);
  font-weight: 800;
  font-stretch: 84%;
  line-height: 0.96;
  letter-spacing: -0.042em;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.mask {
  display: block;
  overflow: hidden;
  padding-bottom: 0.08em;
}

.mask > span {
  display: block;
  transform: translateY(110%);
  animation: rise 1.1s var(--ease-out) forwards;
}
.mask:nth-child(2) > span { animation-delay: 0.1s; }

.hero__foot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.8rem;
  max-width: 56ch;
  margin-top: clamp(2.2rem, 5vw, 3.4rem);
  opacity: 0;
  animation: fade-up 1s var(--ease-out) 0.5s forwards;
}

.hero__foot p {
  max-width: 52ch;
  color: var(--ink-2);
  font-size: clamp(1rem, 1.5vw, 1.16rem);
  text-wrap: pretty;
}

.hero__cta { display: flex; flex-wrap: wrap; gap: 0.7rem; }

/* --- buttons --------------------------------------------------- */
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.3rem;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.4s var(--ease), border-color 0.4s var(--ease);
}

.button span { position: relative; z-index: 1; }

.button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform 0.45s var(--ease-out);
}

.button:hover {
  color: var(--paper);
  border-color: var(--ink);
}
.button:hover::before { transform: none; }

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

/* --- marquee --------------------------------------------------- */
.marquee {
  overflow: hidden;
  padding-block: 0.85rem;
  background: var(--sunken);
  border-block: 1px solid var(--line);
}

.marquee__track {
  display: flex;
  gap: 3rem;
  width: max-content;
  animation: slide 42s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

.marquee__track span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.marquee__track span::after {
  content: "·";
  margin-left: 3rem;
  color: var(--line-strong);
}

/* --- numbers band ---------------------------------------------- */
.band {
  position: relative;
  overflow: hidden;
  background: var(--band);
  color: var(--band-ink);
  padding: 0;
}

/* A light source that follows the pointer, positioned from JS. */
.band::before {
  content: "";
  position: absolute;
  top: var(--pointer-y, 50%);
  left: var(--pointer-x, 50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--specular), transparent 62%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease);
}
.band:hover::before { opacity: 1; }

.band__grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem 1.5rem;
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.stat__value {
  display: block;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  font-stretch: 84%;
  line-height: 1;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
}

.stat__label {
  display: block;
  margin-top: 0.8rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.5;
  color: var(--band-muted);
}

/* --- section furniture ------------------------------------------ */
.section { padding-block: clamp(4.5rem, 10vw, 8rem); }

.section__head { margin-bottom: clamp(2.2rem, 5vw, 3.6rem); }

.section__head h2 {
  margin-top: 0.7rem;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  font-stretch: 88%;
  line-height: 1;
  letter-spacing: -0.035em;
}

.section__rule {
  height: 1px;
  margin-top: 1.4rem;
  background: var(--line-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.1s var(--ease-out);
}
.section__head.is-visible .section__rule { transform: none; }

/* --- work cards -------------------------------------------------- */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2vw, 1.4rem);
}

.card {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  padding: clamp(1.6rem, 3.2vw, 2.4rem);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 1px 2px var(--shadow);
  transition:
    transform 0.55s var(--ease-out),
    box-shadow 0.55s var(--ease-out),
    border-color 0.55s var(--ease);
}

/* Rim light along the top edge. */
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rim) 20%, var(--rim) 80%, transparent);
  opacity: 0.5;
  transition: opacity 0.55s var(--ease);
}
.card:hover::before { opacity: 1; }

/* Only cards that link anywhere behave like something you can click. */
.card:has(.card__link) { cursor: pointer; }
.card:has(.card__link):hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 44px -18px var(--shadow);
  border-color: var(--line-strong);
}
.card:has(.card__link):hover .card__link { color: var(--accent); }

.card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.card__num {
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  color: var(--accent);
}

.card__title {
  margin-bottom: 0.3rem;
  font-family: var(--display);
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  font-weight: 700;
  font-stretch: 92%;
  line-height: 1.08;
  letter-spacing: -0.028em;
}

.card__role {
  margin-bottom: 1.1rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.card__body {
  flex: 1;
  max-width: 62ch;
  font-size: 0.99rem;
  color: var(--ink-2);
}

.tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.8rem;
  margin-top: 1.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.tech li:not(:last-child)::after {
  content: "·";
  margin-left: 0.8rem;
  color: var(--line-strong);
}

.card__link {
  align-self: flex-start;
  margin-top: 1.2rem;
  padding-bottom: 0.12rem;
  border-bottom: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent);
}

/* Stretches the link's hit area over the whole card. */
.card__link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
}

/* --- experience --------------------------------------------------- */
.role {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  padding-block: 2.2rem;
  border-bottom: 1px solid var(--line);
}

.role__when {
  padding-top: 0.45rem;
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  color: var(--ink-2);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.role__kind {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.role__title {
  margin-bottom: 0.25rem;
  font-family: var(--display);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  font-stretch: 92%;
  line-height: 1.12;
  letter-spacing: -0.026em;
}
.role__title b { color: var(--accent); }

.role__place {
  display: block;
  margin-bottom: 0.95rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent);
}

.role__points { display: flex; flex-direction: column; gap: 0.55rem; }

.role__points li {
  position: relative;
  max-width: 66ch;
  padding-left: 1.15rem;
  font-size: 1.04rem;
  line-height: 1.55;
  color: var(--ink-2);
}

.role__points li::before {
  content: "";
  position: absolute;
  top: 0.78em;
  left: 0;
  width: 7px;
  height: 1px;
  background: var(--line-strong);
}

/* --- stack -------------------------------------------------------- */
.stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stack__cell {
  padding: 1.4rem 1.3rem 1.6rem;
  background: var(--panel);
}

.stack__cell h4 {
  margin-bottom: 0.9rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}

.stack__cell ul { display: flex; flex-direction: column; gap: 0.32rem; }
.stack__cell li { font-size: 0.92rem; color: var(--ink-2); }

/* --- contact ------------------------------------------------------ */
.contact__title {
  font-family: var(--display);
  font-size: clamp(2.2rem, 7vw, 5rem);
  font-weight: 800;
  font-stretch: 84%;
  line-height: 0.95;
  letter-spacing: -0.045em;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: clamp(2rem, 5vw, 3.2rem);
}

.contact__note {
  max-width: 38ch;
  color: var(--ink-2);
}

.links { border-top: 1px solid var(--line-strong); }

.links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0.2rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition:
    padding-left 0.4s var(--ease),
    color 0.4s var(--ease),
    background 0.4s var(--ease);
}

.links em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.links a:hover {
  padding-left: 0.85rem;
  color: var(--accent);
  background: var(--accent-wash);
}
.links a:hover em { color: var(--accent); }

/* --- footer -------------------------------------------------------- */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* --- motion --------------------------------------------------------- */
@keyframes rise { to { transform: none; } }
@keyframes fade-in { to { opacity: 1; } }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
@keyframes slide { to { transform: translateX(-50%); } }

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.85s var(--ease-out),
    transform 0.85s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* --- layout breakpoints ---------------------------------------------- */
@media (min-width: 800px) {
  .role {
    grid-template-columns: 12.5rem 1fr;
    gap: clamp(1.5rem, 4vw, 3.5rem);
  }
}

@media (min-width: 860px) {
  .band__grid { grid-template-columns: repeat(4, 1fr); gap: 2rem; }
  .contact__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 4rem;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .card--wide { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .nav__links a { display: none; }
  .nav__links a.nav__mobile { display: block; color: var(--ink); }
  .hero { min-height: auto; padding-block: 4rem 3.5rem; }
}

/* Body copy steps down on phones; headings keep their clamps. */
@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .hero__foot p { font-size: 1rem; line-height: 1.55; }
  .card__body { font-size: 0.93rem; }
  .card__title { font-size: 1.24rem; }
  .role__points li { font-size: 0.94rem; line-height: 1.5; }
  .role__title { font-size: 1.18rem; }
  .stack__cell li { font-size: 0.88rem; }
  .links a { font-size: 0.92rem; }
  .contact__note { font-size: 1rem; }
  .stat__label { font-size: 0.6rem; letter-spacing: 0.14em; }
  .tech { font-size: 0.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .section__rule { opacity: 1; transform: none; transition: none; }
  .mask > span,
  .hero__eyebrow,
  .hero__foot { animation: none; opacity: 1; transform: none; }
  .marquee__track { animation: none; }
}