/* ============================================================
   yehor.dev — portfolio
   Palette: warm near-black + crimson/ember signature
   Type: Space Grotesk (display) / Inter (body) / JetBrains Mono (utility)
   ============================================================ */

:root {
  --ink:        #140607;   /* warm near-black base            */
  --ink-1:      #1c0a0c;   /* raised surface                  */
  --ink-2:      #260e11;   /* card surface                    */
  --line:       #3a1418;   /* hairline / borders              */
  --crimson:    #e6332a;   /* primary accent                  */
  --ember:      #ff6b4a;   /* warm secondary                  */
  --oxblood:    #7a1216;   /* deep red for depth              */
  --bone:       #f5eee6;   /* primary text                    */
  --ash:        #b8a39d;   /* secondary text                  */
  --ash-dim:    #7d6660;   /* tertiary / captions             */

  --grad: linear-gradient(105deg, var(--crimson), var(--ember));

  --display: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1200px;
  --r: 16px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--body);
  background: var(--ink);
  color: var(--bone);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* warm grain/red ambient backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 50% at 85% -5%, rgba(230,51,42,.18), transparent 60%),
    radial-gradient(50% 45% at -5% 30%, rgba(122,18,22,.22), transparent 60%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

::selection { background: var(--crimson); color: #fff; }

:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: .95rem;
  padding: .7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn--lg { padding: .95rem 1.6rem; font-size: 1.02rem; }

.btn--solid {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(230,51,42,.6);
}
.btn--solid:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -10px rgba(255,107,74,.7); }

.btn--ghost {
  background: rgba(245,238,230,.03);
  color: var(--bone);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--crimson); color: #fff; transform: translateY(-2px); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: rgba(20,6,7,.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__brand { display: flex; align-items: center; gap: .55rem; font-family: var(--mono); font-weight: 700; }
.nav__mark { color: var(--crimson); }
.nav__name { letter-spacing: -.02em; }
.nav__dot { color: var(--crimson); }

.nav__links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  font-size: .92rem;
  color: var(--ash);
}
.nav__links a { position: relative; padding: .25rem 0; transition: color .2s; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--grad); transition: width .25s var(--ease);
}
.nav__links a:hover { color: var(--bone); }
.nav__links a:hover::after { width: 100%; }

.nav__actions { display: flex; gap: .6rem; position: relative; z-index: 2; flex-shrink: 0; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.nav__burger span { width: 24px; height: 2px; background: var(--bone); transition: .3s var(--ease); }
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Layout helpers ---------- */
section { padding: clamp(4rem, 9vw, 8rem) clamp(1rem, 4vw, 3rem); }

.section-head { max-width: 720px; margin: 0 auto clamp(2.5rem, 5vw, 4rem); text-align: center; }
.section-head__label {
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--crimson);
  margin-bottom: .9rem;
}
.section-head__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  line-height: 1.12;
  letter-spacing: -.02em;
}
.section-head__sub { margin-top: 1rem; color: var(--ash); font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: clamp(3rem, 7vw, 6rem);
  position: relative;
}
.hero__glow {
  position: absolute;
  top: -10%; right: -5%;
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(230,51,42,.28), transparent 65%);
  filter: blur(30px);
  z-index: -1;
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--ash);
  padding: .35rem .8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  margin-bottom: 1.5rem;
}
.eyebrow__pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: #35d07f;
  box-shadow: 0 0 0 0 rgba(53,208,127,.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(53,208,127,.55); }
  70% { box-shadow: 0 0 0 8px rgba(53,208,127,0); }
  100% { box-shadow: 0 0 0 0 rgba(53,208,127,0); }
}

.hero__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -.03em;
}
.hero__title-accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  margin-top: 1.4rem;
  max-width: 30rem;
  font-size: 1.12rem;
  color: var(--ash);
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }

.hero__stats {
  display: flex;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  margin-top: 2.6rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__stats span { font-size: .82rem; color: var(--ash-dim); margin-top: .35rem; max-width: 9rem; }

/* ---------- Signature: bot console ---------- */
.console {
  background: linear-gradient(180deg, var(--ink-1), var(--ink));
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(230,51,42,.07) inset;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}
.console__bar {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1rem;
  background: rgba(0,0,0,.25);
  border-bottom: 1px solid var(--line);
}
.console__dot { width: 11px; height: 11px; border-radius: 50%; background: var(--line); }
.console__dot:nth-child(1) { background: #ff5f57; }
.console__dot:nth-child(2) { background: #febc2e; }
.console__dot:nth-child(3) { background: #28c840; }
.console__title {
  margin-left: .6rem;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--ash-dim);
}
.console__body {
  padding: 1.3rem;
  font-family: var(--mono);
  font-size: .86rem;
  display: flex;
  flex-direction: column;
  gap: .7rem;
  flex: 1;
}
.console__line { display: flex; gap: .5rem; }
.console__cmd { color: var(--ember); }
.console__cmd::before { content: "/"; color: var(--crimson); }
.console__reply {
  background: rgba(230,51,42,.08);
  border: 1px solid var(--line);
  border-left: 2px solid var(--crimson);
  border-radius: 0 10px 10px 10px;
  padding: .65rem .85rem;
  color: var(--bone);
  max-width: 92%;
  line-height: 1.5;
}
.console__reply b { color: var(--ember); font-weight: 700; }
.console__caret {
  display: inline-block;
  width: 9px; height: 1.05em;
  background: var(--crimson);
  vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Ticker ---------- */
.ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: rgba(0,0,0,.2);
  padding: .9rem 0;
}
.ticker__track {
  display: inline-flex;
  align-items: center;
  gap: 1.4rem;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: .92rem;
  color: var(--ash);
  animation: scroll 34s linear infinite;
}
.ticker__track i { color: var(--crimson); font-style: normal; }
.ticker__track span:hover { color: var(--bone); }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- Services ---------- */
.services { max-width: var(--maxw); margin: 0 auto; }
.services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}
.svc {
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.svc:hover {
  transform: translateY(-4px);
  border-color: rgba(230,51,42,.45);
  box-shadow: 0 24px 50px -28px rgba(230,51,42,.5);
}
.svc__icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(230,51,42,.12);
  color: var(--ember);
  margin-bottom: 1.2rem;
}
.svc__icon svg { width: 24px; height: 24px; }
.svc__title { font-family: var(--display); font-size: 1.4rem; font-weight: 600; }
.svc__desc { color: var(--ash); margin: .5rem 0 1.2rem; }
.svc__list { display: flex; flex-direction: column; gap: .6rem; }
.svc__list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--ash);
  font-size: .96rem;
}
.svc__list li::before {
  content: "▹";
  position: absolute; left: 0;
  color: var(--crimson);
}

/* ---------- Projects ---------- */
.projects { max-width: var(--maxw); margin: 0 auto; }
.projects__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}
.proj {
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.proj:hover {
  transform: translateY(-5px);
  border-color: rgba(230,51,42,.45);
  box-shadow: 0 30px 60px -30px rgba(230,51,42,.45);
}

.proj__screen {
  height: 190px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.proj__screen--crm  { background: radial-gradient(120% 100% at 30% 0%, #2a0e12, #160708); }
.proj__screen--kyiv { background: radial-gradient(120% 100% at 70% 0%, #2a1010, #140707); }
.proj__screen--neon { background: radial-gradient(120% 100% at 50% 0%, #2c0c14, #120608); }
.proj__screen--docs { background: #0c0405; }

.proj__chat { display: flex; flex-direction: column; gap: .5rem; padding: 1rem; width: 100%; max-width: 280px; }
.bubble {
  font-size: .8rem; padding: .45rem .75rem; border-radius: 12px; width: fit-content;
  font-family: var(--mono);
}
.bubble--bot  { background: var(--ink-2); border: 1px solid var(--line); border-bottom-left-radius: 3px; }
.bubble--user { background: var(--grad); color: #fff; align-self: flex-end; border-bottom-right-radius: 3px; }

.proj__modules {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; padding: 1rem; width: 100%; max-width: 320px;
}
.proj__modules span {
  font-family: var(--mono); font-size: .72rem; color: var(--ash);
  background: rgba(0,0,0,.3); border: 1px solid var(--line);
  border-radius: 8px; padding: .5rem; text-align: center;
}

.proj__glitch {
  font-family: var(--display); font-weight: 700; font-size: 2rem; letter-spacing: .1em;
  color: var(--ember); position: relative;
  text-shadow: 2px 0 var(--crimson), -2px 0 #00e5ff;
}

.proj__code {
  font-family: var(--mono); font-size: .78rem; line-height: 1.9; color: var(--ash); padding: 0 1.2rem;
}
.proj__code .ln { display: block; }
.proj__code b { color: var(--crimson); }
.proj__code .ok { color: #35d07f; }

.proj__body { padding: clamp(1.4rem, 2.5vw, 1.9rem); display: flex; flex-direction: column; flex: 1; }
.proj__meta { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: .9rem; }
.tag {
  font-family: var(--mono); font-size: .72rem;
  padding: .25rem .6rem; border-radius: 6px;
  background: rgba(245,238,230,.04); border: 1px solid var(--line); color: var(--ash);
}
.tag--accent { background: rgba(230,51,42,.14); border-color: rgba(230,51,42,.4); color: var(--ember); }
.proj__title { font-family: var(--display); font-size: 1.45rem; font-weight: 600; }
.proj__desc { color: var(--ash); margin: .6rem 0 1rem; font-size: .98rem; }
.proj__desc strong { color: var(--bone); }
.proj__did { display: flex; flex-direction: column; gap: .45rem; margin-bottom: 1.3rem; }
.proj__did li { position: relative; padding-left: 1.4rem; font-size: .9rem; color: var(--ash); }
.proj__did li::before { content: "+"; position: absolute; left: 0; color: var(--crimson); font-family: var(--mono); }
.proj__links { margin-top: auto; display: flex; flex-direction: column; gap: .5rem; }
.proj__link { font-family: var(--display); font-weight: 600; color: var(--ember); width: fit-content; transition: color .2s, gap .2s; }
.proj__link:hover { color: #fff; }
.proj__stack { font-family: var(--mono); font-size: .74rem; color: var(--ash-dim); }

/* ---------- Stack ---------- */
.stack { max-width: var(--maxw); margin: 0 auto; }
.stack__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
.stack__col {
  background: var(--ink-1); border: 1px solid var(--line);
  border-radius: var(--r); padding: 1.6rem 1.8rem;
}
.stack__cat { font-family: var(--display); font-size: 1.1rem; color: var(--ember); margin-bottom: 1rem; }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chips li {
  font-family: var(--mono); font-size: .82rem;
  padding: .4rem .7rem; border-radius: 8px;
  background: rgba(0,0,0,.25); border: 1px solid var(--line); color: var(--ash);
  transition: border-color .2s, color .2s, transform .2s;
}
.chips li:hover { border-color: var(--crimson); color: var(--bone); transform: translateY(-2px); }

/* ---------- Process ---------- */
.process { max-width: var(--maxw); margin: 0 auto; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; counter-reset: step; }
.step {
  position: relative;
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1.8rem 1.5rem;
}
.step::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--grad);
  border-radius: var(--r) var(--r) 0 0;
  transform: scaleX(.25);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.step:hover::after { transform: scaleX(1); }
.step__num { font-family: var(--mono); font-size: 1.6rem; font-weight: 700; color: var(--oxblood); }
.step__title { font-family: var(--display); font-size: 1.18rem; font-weight: 600; margin: .5rem 0; }
.step__desc { color: var(--ash); font-size: .92rem; }

/* ---------- Why ---------- */
.why { max-width: var(--maxw); margin: 0 auto; }
.why__inner {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.why__head { position: sticky; top: 100px; }
.why__list { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem 2rem; }
.why__list li { border-top: 1px solid var(--line); padding-top: 1rem; }
.why__list span { font-family: var(--display); font-weight: 600; font-size: 1.1rem; color: var(--bone); display: block; margin-bottom: .3rem; }
.why__list p { color: var(--ash); font-size: .92rem; }

/* ---------- Contact ---------- */
.contact { position: relative; text-align: center; overflow: hidden; }
.contact__glow {
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(50% 70% at 50% 100%, rgba(230,51,42,.22), transparent 70%);
  pointer-events: none;
}
.contact__inner { max-width: 640px; margin: 0 auto; }
.contact__title { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: -.02em; margin-top: .6rem; }
.contact__sub { color: var(--ash); font-size: 1.08rem; margin: 1rem auto 2rem; max-width: 30rem; }
.contact__actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }
.contact__note { margin-top: 1.4rem; font-family: var(--mono); font-size: .8rem; color: var(--ash-dim); }

/* ---------- Footer ---------- */
.foot {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  font-size: .88rem; color: var(--ash-dim);
}
.foot__brand { font-family: var(--mono); color: var(--bone); }
.foot__up { transition: color .2s; }
.foot__up:hover { color: var(--ember); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav__links, .nav__actions { display: none; }
  .nav__burger { display: flex; }
  .nav.is-open { flex-wrap: wrap; }
  .nav.is-open .nav__links {
    display: flex; flex-direction: column; gap: 1.1rem;
    width: 100%; margin: 1rem 0 0; order: 3;
  }
  .nav.is-open .nav__actions {
    display: flex; gap: .6rem; width: 100%; order: 4; margin-top: .4rem;
  }
  .hero { grid-template-columns: 1fr; }
  .console { order: 2; min-height: 360px; }
  .hero__copy { order: 1; }
  .services__grid, .projects__grid, .stack__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .why__inner { grid-template-columns: 1fr; }
  .why__head { position: static; }
}
@media (max-width: 540px) {
  .steps { grid-template-columns: 1fr; }
  .why__list { grid-template-columns: 1fr; }
  .hero__stats { flex-wrap: wrap; }
}

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