/* ============================================================
   Maksims Burčenko — web CV
   Stils: noir + Motion-Driven. Mobile-first.
   ============================================================ */

:root {
  /* fons / virsmas */
  --bg:        #0A0E14;
  --bg-2:      #0C111A;
  --surface:   #121823;
  --surface-2: #161E2B;

  /* teksts */
  --text:      #E8E0D0;   /* silts krēms */
  --text-dim:  #9AA6B8;   /* vēss blāvs */
  --text-mute: #768097;

  /* akcents */
  --accent:    #4DA3FF;   /* zils */
  --accent-2:  #22D3EE;   /* ciāns */
  --accent-ink:#06121F;

  /* līnijas */
  --line:      rgba(232, 224, 208, 0.10);
  --line-2:    rgba(232, 224, 208, 0.16);

  /* tipogrāfija */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body:    "Space Grotesk", system-ui, -apple-system, Segoe UI, sans-serif;

  /* mērogi */
  --container: 1120px;
  --radius:    16px;
  --radius-sm: 10px;

  /* atstarpes (8pt ritms) */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px;
  --s-5: 24px; --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;

  --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.7);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0.005em;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--accent-ink); }

/* ---------- background canvas + vignette ---------- */
#network {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}
.vignette {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(77,163,255,0.10), transparent 60%),
    radial-gradient(100% 60% at 50% 110%, rgba(34,211,238,0.06), transparent 55%),
    linear-gradient(180deg, transparent 0%, rgba(10,14,20,0.35) 70%, rgba(10,14,20,0.7) 100%);
}

/* ---------- helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--s-5);
}
.ic { width: 1.15em; height: 1.15em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.skip-link {
  position: absolute;
  left: -999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: var(--s-2) var(--s-4); border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100; font-weight: 600;
}
.skip-link:focus { left: 0; }

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

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: linear-gradient(180deg, rgba(10,14,20,0.85), rgba(10,14,20,0.5));
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--line); background: rgba(10,14,20,0.9); }
.nav__inner {
  display: flex; align-items: center; gap: var(--s-4);
  height: 64px;
}
.nav__brand { display: flex; align-items: center; gap: var(--s-3); margin-right: auto; }
.nav__monogram {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border: 1px solid var(--line-2); border-radius: 10px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  color: var(--accent);
  background: linear-gradient(160deg, rgba(77,163,255,0.12), transparent);
}
.nav__name { display: none; font-weight: 500; letter-spacing: 0.01em; font-size: 0.95rem; }
.nav__links { display: none; gap: var(--s-5); }
.nav__links a {
  font-size: 0.92rem; color: var(--text-dim);
  position: relative; padding: var(--s-2) 0;
  transition: color 0.25s var(--ease);
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1.5px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform 0.3s var(--ease);
}
.nav__links a:hover, .nav__links a.active { color: var(--text); }
.nav__links a.active::after, .nav__links a:hover::after { transform: scaleX(1); }
.nav__cv { padding: var(--s-2) var(--s-4); }
.nav__cv .nav__cv-txt { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-body); font-weight: 500; font-size: 0.95rem;
  padding: var(--s-3) var(--s-5);
  border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; white-space: nowrap;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), color 0.25s var(--ease);
}
.btn .ic { width: 1.05em; height: 1.05em; }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink); font-weight: 600;
  box-shadow: 0 10px 30px -12px rgba(77,163,255,0.6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(77,163,255,0.75); }
.btn--ghost {
  background: rgba(232,224,208,0.03);
  border-color: var(--line-2); color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex; align-items: center;
  padding: var(--s-9) 0 var(--s-8);
}
.hero__inner { max-width: 880px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line); border-radius: 999px;
  padding: var(--s-2) var(--s-4);
  margin-bottom: var(--s-5);
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 0 rgba(34,211,238,0.6);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34,211,238,0.55); }
  70% { box-shadow: 0 0 0 9px rgba(34,211,238,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); }
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.7rem, 11vw, 6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-optical-sizing: auto;
  margin-bottom: var(--s-4);
  background: linear-gradient(180deg, var(--text) 60%, rgba(232,224,208,0.55));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__role {
  font-size: clamp(1.05rem, 4.5vw, 1.5rem);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--s-5);
}
.hero__role .sep { color: var(--text-mute); margin: 0 0.4em; }
.hero__tagline {
  font-size: clamp(1.05rem, 3.4vw, 1.35rem);
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 40ch;
  margin-bottom: var(--s-6);
}
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-bottom: var(--s-7); }
.hero__stats {
  display: flex; flex-wrap: wrap; gap: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line);
}
.hero__stats dt {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.6rem, 6vw, 2.2rem); color: var(--text);
  line-height: 1;
}
.hero__stats dd { color: var(--text-mute); font-size: 0.85rem; margin-top: var(--s-1); }

.hero__scroll {
  position: absolute; left: 50%; bottom: var(--s-5);
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid var(--line-2); border-radius: 14px;
  display: grid; place-items: start center; padding-top: 7px;
}
.hero__scroll span {
  width: 4px; height: 8px; border-radius: 4px; background: var(--accent);
  animation: scrollDot 1.8s var(--ease) infinite;
}
@keyframes scrollDot {
  0% { opacity: 0; transform: translateY(-2px); }
  40% { opacity: 1; }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ---------- sections ---------- */
.section { padding: var(--s-9) 0; position: relative; }
.section::before {
  /* lai teksts paliek lasāms virs canvas */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(10,14,20,0.0), rgba(10,14,20,0.82) 18%, rgba(10,14,20,0.82) 82%, rgba(10,14,20,0.0));
  pointer-events: none;
}
.section__head { max-width: 720px; margin-bottom: var(--s-7); }
.section__eyebrow {
  font-size: 0.8rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin-bottom: var(--s-3); font-weight: 500;
}
.section__title {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.9rem, 6.5vw, 3rem); line-height: 1.08;
  letter-spacing: -0.015em;
}
.section__lead { margin-top: var(--s-4); color: var(--text-dim); font-size: 1.05rem; max-width: 52ch; }

/* ---------- grids ---------- */
.grid { display: grid; gap: var(--s-4); }
.grid--cards { grid-template-columns: 1fr; }
.grid--skills { grid-template-columns: 1fr; }
.grid--two { grid-template-columns: 1fr; gap: var(--s-6); }

/* ---------- card ---------- */
.card {
  position: relative;
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--s-6) var(--s-5) var(--s-5);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 80% at 100% 0%, rgba(77,163,255,0.10), transparent 55%);
  opacity: 0; transition: opacity 0.4s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow); }
.card:hover::after { opacity: 1; }
.card__index {
  font-family: var(--font-display); font-size: 0.95rem; color: var(--accent);
  letter-spacing: 0.1em;
}
.card__title {
  font-family: var(--font-display); font-weight: 500;
  font-size: 1.25rem; margin: var(--s-3) 0 var(--s-2); line-height: 1.2;
}
.card p { color: var(--text-dim); font-size: 0.97rem; }

/* ---------- profile ---------- */
.section--profile .profile { max-width: 800px; }
.profile__text {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  font-weight: 300; line-height: 1.55; color: var(--text);
  margin-top: var(--s-5);
}

/* ---------- timeline / experience ---------- */
.timeline { display: grid; gap: var(--s-4); }
.exp {
  display: grid; gap: var(--s-3);
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--s-5);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}
.exp:hover { border-color: var(--line-2); transform: translateY(-3px); }
.exp__meta { display: flex; flex-direction: column; gap: 2px; }
.exp__years {
  font-family: var(--font-body); font-weight: 600; font-variant-numeric: tabular-nums;
  color: var(--accent); font-size: 0.95rem; letter-spacing: 0.02em;
}
.exp__org { color: var(--text-mute); font-size: 0.9rem; }
.exp__role { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; line-height: 1.2; }
.exp__list { display: grid; gap: var(--s-3); margin-top: var(--s-1); }
.exp__list li {
  position: relative; padding-left: var(--s-5); color: var(--text-dim); font-size: 0.97rem;
}
.exp__list li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); opacity: 0.7;
}

/* ---------- skills ---------- */
.skill {
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--s-5);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}
.skill:hover { border-color: var(--line-2); transform: translateY(-3px); }
.skill__title {
  font-family: var(--font-display); font-weight: 500; font-size: 1.15rem;
  margin-bottom: var(--s-4); color: var(--text);
}
.tags { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.tags li {
  font-size: 0.85rem; color: var(--text-dim);
  background: rgba(232,224,208,0.04);
  border: 1px solid var(--line);
  padding: var(--s-2) var(--s-3); border-radius: 999px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.skill:hover .tags li { border-color: var(--line-2); }

/* ---------- education ---------- */
.eduCol__head {
  font-family: var(--font-display); font-weight: 500; font-size: 1.3rem;
  margin-bottom: var(--s-5); display: flex; align-items: center; gap: var(--s-3);
}
.eduCol__badge {
  font-family: var(--font-body); font-size: 0.72rem; letter-spacing: 0.1em;
  color: var(--accent); border: 1px solid var(--line-2);
  padding: 2px var(--s-2); border-radius: 999px;
}
.edu { display: grid; gap: var(--s-5); }
.edu li { display: grid; gap: 2px; padding-left: var(--s-4); border-left: 2px solid var(--line); }
.edu__year { font-weight: 600; color: var(--accent); font-size: 0.88rem; font-variant-numeric: tabular-nums; }
.edu__main { font-weight: 500; color: var(--text); }
.edu__sub { color: var(--text-dim); font-size: 0.92rem; }
.cpd { display: grid; gap: var(--s-3); }
.cpd li {
  position: relative; padding-left: var(--s-5); color: var(--text-dim); font-size: 0.95rem;
}
.cpd li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2);
}

/* ---------- contact ---------- */
.section--contact { padding-bottom: var(--s-8); }
.contact { max-width: 820px; }
.contact__title {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(2rem, 7vw, 3.2rem); line-height: 1.05; margin: var(--s-2) 0 var(--s-3);
}
.contact__lead { color: var(--text-dim); font-size: 1.05rem; margin-bottom: var(--s-6); max-width: 46ch; }
.contact__grid { display: grid; grid-template-columns: 1fr; gap: var(--s-3); }
.contact__item {
  display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto;
  column-gap: var(--s-4); row-gap: 0; align-items: center;
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: var(--s-4) var(--s-5);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}
.contact__item .ic { grid-row: 1 / 3; width: 1.5em; height: 1.5em; color: var(--accent); }
.contact__label { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-mute); min-width: 0; }
.contact__val { font-weight: 500; color: var(--text); font-size: 0.95rem; line-height: 1.3; min-width: 0; overflow-wrap: anywhere; }
a.contact__item:hover { transform: translateY(-2px); border-color: var(--accent); }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: var(--s-6) 0; color: var(--text-mute); }
.footer__inner { display: flex; justify-content: space-between; align-items: center; font-size: 0.88rem; }
.footer__top:hover { color: var(--accent); }

/* ---------- reveal animation ---------- */
[data-reveal] {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE (mobile-first -> up)
   ============================================================ */
@media (min-width: 600px) {
  .grid--cards { grid-template-columns: repeat(2, 1fr); }
  .grid--skills { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: repeat(2, 1fr); }
  .exp { grid-template-columns: 220px 1fr; align-items: start; gap: var(--s-5); }
  .nav__name { display: inline; }
}

@media (min-width: 900px) {
  .container { padding-inline: var(--s-6); }
  .nav__links { display: flex; }
  .grid--two { grid-template-columns: 1fr 1fr; gap: var(--s-7); }
  .section { padding: 120px 0; }
}

@media (min-width: 1100px) {
  .grid--cards { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__scroll span, .eyebrow .dot { animation: none; }
}