/* ==========================================================================
   Artem Demchenko — portfolio  |  dark / modern theme
   ========================================================================== */

:root {
  --bg: #07080d;
  --bg-2: #0c0e16;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f5fa;
  --text-dim: #a7adbe;
  --text-faint: #6c7283;
  --accent: #6366f1;   /* indigo */
  --accent-2: #22d3ee; /* cyan   */
  --accent-3: #f472b6; /* pink   */
  --grad: linear-gradient(120deg, #818cf8 0%, #22d3ee 55%, #34d399 100%);
  --grad-text: linear-gradient(100deg, #c7d2fe 0%, #a5f3fc 50%, #f5d0fe 100%);
  --radius: 20px;
  --radius-sm: 14px;
  --maxw: 1180px;
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ambient background glows */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60rem 60rem at 15% -10%, rgba(99, 102, 241, 0.18), transparent 60%),
    radial-gradient(50rem 50rem at 95% 0%, rgba(34, 211, 238, 0.13), transparent 55%),
    radial-gradient(45rem 45rem at 60% 110%, rgba(244, 114, 182, 0.10), transparent 55%),
    var(--bg);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: radial-gradient(70% 70% at 50% 30%, #000 40%, transparent 100%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- top nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 8, 13, 0.6);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand .dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.8);
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text) !important;
  background: var(--surface);
  transition: border-color 0.2s, transform 0.2s;
}
.nav-cta:hover { border-color: var(--accent-2); transform: translateY(-1px); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.2s;
}
.btn-primary {
  color: #07080d;
  background: var(--grad);
  box-shadow: 0 10px 30px -10px rgba(34, 211, 238, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(34, 211, 238, 0.7); }
.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent-2); transform: translateY(-2px); }

/* ---------- hero ---------- */
.hero { padding: 86px 0 54px; position: relative; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 26px;
}
.eyebrow .live {
  width: 8px; height: 8px; border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}
.hero h1 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  margin: 0 0 22px;
}
.hero h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead {
  max-width: 620px;
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: var(--text-dim);
  margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 52px;
  max-width: 640px;
}
.stat { }
.stat .num {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  letter-spacing: -0.02em;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .lbl { font-size: 0.85rem; color: var(--text-faint); margin-top: 2px; }

/* tech marquee / chips */
.tech {
  margin-top: 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.tech .tech-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  margin-right: 6px;
}
.chip {
  font-size: 0.85rem;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); transform: translateY(-1px); }

/* ---------- section heading ---------- */
.section { padding: 60px 0; }
.section-head { margin-bottom: 36px; }
.section-head .kicker {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-2);
  font-weight: 600;
}
.section-head h2 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  margin: 10px 0 0;
}
.section-head p { color: var(--text-dim); max-width: 620px; margin: 12px 0 0; }

/* ---------- project grid (masonry via columns) ---------- */
.grid {
  column-count: 3;
  column-gap: 22px;
}
@media (max-width: 900px) { .grid { column-count: 2; } }
@media (max-width: 600px) { .grid { column-count: 1; } }

.card {
  break-inside: avoid;
  margin-bottom: 22px;
  display: block;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transition: transform 0.35s cubic-bezier(.2,.8,.2,1), border-color 0.3s, box-shadow 0.35s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: 0 30px 70px -28px rgba(0,0,0,0.85);
}
.card img {
  width: 100%;
  display: block;
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transition: transform 0.6s cubic-bezier(.2,.8,.2,1);
}
.card:hover img { transform: scale(1.04) translateZ(0); }
.card-body {
  position: absolute;
  inset: auto 0 0 0;
  padding: 20px;
  background: linear-gradient(to top, rgba(5,6,11,0.92) 8%, rgba(5,6,11,0.55) 55%, transparent 100%);
}
.card-cat {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-2);
  font-weight: 600;
}
.card-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 4px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title .arrow {
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s, transform 0.3s;
  color: var(--accent-2);
}
.card:hover .card-title .arrow { opacity: 1; transform: translateX(0); }
.card-desc { font-size: 0.9rem; color: var(--text-dim); margin: 6px 0 0; }

/* featured (Breeze Booth) gradient card */
.card.featured {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px;
  background:
    radial-gradient(120% 80% at 0% 0%, rgba(99,102,241,0.55), transparent 60%),
    radial-gradient(120% 90% at 100% 20%, rgba(34,211,238,0.42), transparent 55%),
    radial-gradient(120% 90% at 80% 110%, rgba(244,114,182,0.40), transparent 55%),
    #0d1020;
  border-color: var(--border-strong);
}
.card.featured .badge {
  position: absolute;
  top: 18px; left: 18px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(7,8,13,0.5);
  border: 1px solid rgba(255,255,255,0.22);
  backdrop-filter: blur(6px);
}
.card.featured .f-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 1.7rem;
  background: rgba(7,8,13,0.4);
  border: 1px solid rgba(255,255,255,0.22);
  backdrop-filter: blur(6px);
  margin-bottom: 16px;
}
.card.featured .card-cat { color: #d7fbff; }
.card.featured .card-title { font-size: 1.7rem; color: #fff; }
.card.featured .card-desc { color: rgba(255,255,255,0.82); font-size: 0.95rem; max-width: 30ch; }

/* ---------- project detail header ---------- */
.detail-head { padding: 56px 0 30px; }
.back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 28px;
  transition: color 0.2s, gap 0.2s;
}
.back:hover { color: var(--text); gap: 12px; }
.detail-head h1 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 0 0 8px;
  line-height: 1.05;
}
.detail-head .sub { color: var(--accent-2); font-weight: 600; letter-spacing: 0.02em; }
.detail-head .desc { color: var(--text-dim); max-width: 680px; margin: 18px 0 0; font-size: 1.05rem; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.meta-pill {
  font-size: 0.82rem;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
}

/* gallery */
.gallery {
  column-count: 3;
  column-gap: 20px;
  padding-bottom: 30px;
}
@media (max-width: 900px) { .gallery { column-count: 2; } }
@media (max-width: 560px) { .gallery { column-count: 2; } }
.shot {
  break-inside: avoid;
  margin-bottom: 20px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: zoom-in;
  position: relative;
  transition: transform 0.3s, border-color 0.3s;
}
.shot:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.shot img { width: 100%; }

/* feature list (breeze page) */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  padding-bottom: 20px;
}
.feature {
  padding: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.3s, border-color 0.3s;
}
.feature:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.feature .ico { font-size: 1.5rem; margin-bottom: 12px; }
.feature h3 { font-family: var(--font-head); font-size: 1.05rem; margin: 0 0 6px; font-weight: 600; }
.feature p { color: var(--text-dim); font-size: 0.92rem; margin: 0; }

/* ---------- about page ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; gap: 32px; } }
.prose p { color: var(--text-dim); font-size: 1.08rem; margin: 0 0 18px; }
.prose p strong { color: var(--text); font-weight: 600; }
.panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 22px;
}
.panel h3 {
  font-family: var(--font-head);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-faint);
  margin: 0 0 16px;
  font-weight: 600;
}
.skill-row { display: flex; flex-wrap: wrap; gap: 9px; }
.skill-group { margin-bottom: 16px; }
.skill-group:last-child { margin-bottom: 0; }
.skill-group .glabel {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--text-faint);
  margin-bottom: 9px;
}
.tl { list-style: none; margin: 0; padding: 0; }
.tl li { position: relative; padding: 0 0 22px 24px; }
.tl li::before {
  content: ""; position: absolute; left: 3px; top: 7px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--grad);
}
.tl li::after {
  content: ""; position: absolute; left: 7px; top: 18px; bottom: 0;
  width: 1px; background: var(--border);
}
.tl li:last-child { padding-bottom: 0; }
.tl li:last-child::after { display: none; }
.tl .role { font-weight: 600; color: var(--text); }
.tl .where { color: var(--accent-2); font-size: 0.92rem; }
.tl .when { color: var(--text-faint); font-size: 0.82rem; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 44px 0 56px;
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; }
.footer .copyright { color: var(--text-faint); font-size: 0.88rem; }
.socials { display: flex; gap: 10px; }
.socials a {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  transition: transform 0.2s, border-color 0.2s, color 0.2s, background 0.2s;
}
.socials a:hover { transform: translateY(-3px); border-color: var(--accent-2); color: var(--text); background: var(--surface-2); }
.socials svg { width: 19px; height: 19px; }

/* ---------- lightbox ---------- */
.lb {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(4, 5, 9, 0.92);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center; justify-content: center;
  padding: 4vh 4vw;
}
.lb.open { display: flex; }
.lb img { max-width: 92vw; max-height: 90vh; border-radius: 14px; box-shadow: 0 30px 80px -20px rgba(0,0,0,0.9); }
.lb-close, .lb-nav {
  position: absolute;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  width: 48px; height: 48px;
  border-radius: 50%;
  font-size: 1.3rem;
  cursor: pointer;
  display: grid; place-items: center;
  transition: background 0.2s, transform 0.2s;
}
.lb-close:hover, .lb-nav:hover { background: rgba(255,255,255,0.16); transform: scale(1.05); }
.lb-close { top: 22px; right: 22px; }
.lb-nav.prev { left: 18px; top: 50%; transform: translateY(-50%); }
.lb-nav.next { right: 18px; top: 50%; transform: translateY(-50%); }
.lb-nav.prev:hover, .lb-nav.next:hover { transform: translateY(-50%) scale(1.05); }
@media (max-width: 600px) { .lb-nav { width: 42px; height: 42px; } }

/* ---------- scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* small screens nav */
@media (max-width: 620px) {
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
}