/* ISTOK Group — premium site styles */
@import url('https://fonts.googleapis.com/css2?family=Michroma&family=Outfit:wght@200;300;400;500;600;700&family=JetBrains+Mono:wght@300;400;500&display=swap');

:root {
  --bg-0: #05071a;
  --bg-1: #0a0926;
  --bg-2: #100e38;
  --bg-3: #181559;
  --ink-0: #ffffff;
  --ink-1: #d4def9;
  --ink-2: #8a93c2;
  --ink-3: #4a527a;
  --accent: #479efe;
  --accent-2: #4138c4;
  --accent-soft: #d4def9;
  --accent-glow: rgba(71, 158, 254, 0.55);
  --gradient-radial: radial-gradient(circle at center, #d4def9 0%, #479efe 29%, #4138c4 61%, #100e38 100%);
  --hairline: rgba(212, 222, 249, 0.12);
  --hairline-strong: rgba(212, 222, 249, 0.22);

  --font-display: 'Outfit', system-ui, sans-serif;
  --font-tech: 'Michroma', 'Outfit', sans-serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1440px;
  --pad-x: clamp(20px, 4vw, 80px);
}

/* LIGHT THEME — applied to every section after the hero/ticker */
.theme-light {
  --bg-0: #f4f5fb;
  --bg-1: #ebeef6;
  --bg-2: #e1e6f2;
  --bg-3: #d3daee;
  --ink-0: #05071a;
  --ink-1: #1a1e3d;
  --ink-2: #5a6088;
  --ink-3: #9aa0bf;
  --accent-soft: #4138c4;
  --hairline: rgba(10, 9, 38, 0.10);
  --hairline-strong: rgba(10, 9, 38, 0.20);
  background: var(--bg-0);
  color: var(--ink-1);
}
.theme-light strong, .theme-light b { color: var(--ink-0); }
.theme-light .tech-label-lg { color: var(--ink-0); }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg-0); color: var(--ink-1); font-family: var(--font-body); font-weight: 300; -webkit-font-smoothing: antialiased; }
body { overflow-x: hidden; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

::selection { background: var(--accent); color: var(--bg-0); }

/* Type system */
.tech-label { font-family: var(--font-tech); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-2); }
.tech-label-lg { font-family: var(--font-tech); font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-1); }
.mono { font-family: var(--font-mono); letter-spacing: 0; }

.display-1 { font-family: var(--font-display); font-weight: 200; font-size: clamp(56px, 9vw, 168px); line-height: 0.94; letter-spacing: -0.03em; color: var(--ink-0); }
.display-2 { font-family: var(--font-display); font-weight: 200; font-size: clamp(44px, 6vw, 96px); line-height: 0.98; letter-spacing: -0.025em; color: var(--ink-0); }
.display-3 { font-family: var(--font-display); font-weight: 200; font-size: clamp(36px, 4.5vw, 72px); line-height: 1.02; letter-spacing: -0.02em; color: var(--ink-0); }
.h-3 { font-family: var(--font-display); font-weight: 300; font-size: clamp(20px, 1.8vw, 28px); line-height: 1.2; letter-spacing: -0.01em; color: var(--ink-0); }
.body-lg { font-size: clamp(17px, 1.4vw, 22px); line-height: 1.45; color: var(--ink-1); font-weight: 300; }
.body-md { font-size: 16px; line-height: 1.55; color: var(--ink-1); font-weight: 300; }
.body-sm { font-size: 14px; line-height: 1.55; color: var(--ink-2); font-weight: 300; }

strong, b { font-weight: 500; color: var(--ink-0); }

/* Sections / Layout */
section { position: relative; padding: clamp(96px, 12vh, 160px) var(--pad-x); }
.section-inner { max-width: var(--maxw); margin: 0 auto; position: relative; z-index: 1; }
.section-header { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; padding-bottom: 56px; border-bottom: 1px solid var(--hairline); margin-bottom: 56px; flex-wrap: wrap; }
.section-num { font-family: var(--font-tech); font-size: 12px; color: var(--ink-2); letter-spacing: 0.16em; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px var(--pad-x);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  background: rgba(5, 7, 26, 0.65);
  border-bottom: 1px solid var(--hairline);
  transition: background 280ms ease, border-color 280ms ease;
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo svg, .nav-logo img { display: block; }
.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-family: var(--font-tech); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-1); transition: color 200ms ease; position: relative;
}
.nav-links a:hover { color: var(--accent-soft); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 280ms ease;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta {
  font-family: var(--font-tech); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  padding: 12px 22px; border: 1px solid var(--hairline-strong); border-radius: 999px;
  color: var(--ink-0); transition: all 260ms ease;
  background: linear-gradient(135deg, rgba(71,158,254,0.06), rgba(65,56,196,0.06));
}
.nav-cta:hover { border-color: var(--accent); background: linear-gradient(135deg, rgba(71,158,254,0.18), rgba(65,56,196,0.2)); box-shadow: 0 0 32px var(--accent-glow); }

@media (max-width: 880px) {
  .nav-links { display: none; }
}

/* HERO */
.hero {
  min-height: 100vh; min-height: 100svh;
  padding-top: 120px;
  display: flex; flex-direction: column; justify-content: flex-end;
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 110%, rgba(65,56,196,0.45) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 20%, rgba(71,158,254,0.18) 0%, transparent 70%),
    var(--bg-0);
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hero-content { position: relative; z-index: 2; padding-bottom: 80px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 16px; border: 1px solid var(--hairline-strong); border-radius: 999px;
  background: rgba(10, 9, 38, 0.5); backdrop-filter: blur(8px);
  margin-bottom: 32px;
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero-headline { max-width: 1280px; }
.hero-headline em { font-style: normal; background: linear-gradient(120deg, var(--accent-soft) 0%, var(--accent) 60%, var(--accent-2) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; font-weight: 300; }

.hero-sub { margin-top: 32px; max-width: 720px; }
.hero-meta {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  margin-top: 88px; padding-top: 32px; border-top: 1px solid var(--hairline);
}
.hero-meta-item .num { font-family: var(--font-tech); font-size: clamp(28px, 3.4vw, 48px); color: var(--ink-0); font-weight: 400; line-height: 1; letter-spacing: -0.01em; }
.hero-meta-item .lbl { font-family: var(--font-tech); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-2); margin-top: 12px; }

@media (max-width: 720px) {
  .hero-meta { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

/* Marquee ticker */
.ticker {
  border-block: 1px solid var(--hairline);
  background: rgba(10,9,38,0.6);
  overflow: hidden; padding: 18px 0;
  display: flex; gap: 48px; white-space: nowrap;
}
.ticker-track { display: flex; gap: 48px; animation: tickerSlide 40s linear infinite; flex-shrink: 0; }
.ticker-item { font-family: var(--font-tech); font-size: 12px; color: var(--ink-2); letter-spacing: 0.16em; text-transform: uppercase; display: inline-flex; align-items: center; gap: 48px; }
.ticker-item::after { content: '◆'; color: var(--accent); font-size: 8px; }
@keyframes tickerSlide { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* About section */
.about {
  background: var(--bg-0);
}
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 96px); align-items: start; }
@media (max-width: 880px) { .about-grid { grid-template-columns: 1fr; } }

.lead { font-size: clamp(22px, 2vw, 32px); font-weight: 200; line-height: 1.35; color: var(--ink-0); letter-spacing: -0.01em; }

.partner-card {
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 32px;
  background: linear-gradient(180deg, rgba(16,14,56,0.6), rgba(10,9,38,0.6));
  margin-top: 32px;
}
.theme-light .partner-card {
  background: linear-gradient(180deg, #ffffff, #f4f5fb);
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset, 0 18px 40px -24px rgba(16,14,56,0.18);
}
.partner-card .tech-label { color: var(--accent); }
.partner-card h4 { font-family: var(--font-display); font-weight: 300; font-size: 28px; margin: 12px 0 8px; color: var(--ink-0); letter-spacing: -0.01em; }

/* What we do — services grid */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); }
.service-tile {
  background: var(--bg-0); padding: 36px 28px;
  display: flex; flex-direction: column; gap: 18px;
  position: relative; overflow: hidden;
  transition: background 360ms ease, transform 360ms ease;
  min-height: 240px;
  cursor: default;
}
.service-tile:hover { background: var(--bg-1); }
.service-tile:hover .service-glow { opacity: 1; }
.service-glow {
  position: absolute; inset: -1px; pointer-events: none; opacity: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(71,158,254,0.18) 0%, transparent 50%);
  transition: opacity 360ms ease;
}
.service-tile .num { font-family: var(--font-tech); font-size: 11px; color: var(--ink-3); letter-spacing: 0.16em; }
.service-tile .title { font-family: var(--font-display); font-weight: 300; font-size: 20px; line-height: 1.18; letter-spacing: -0.01em; color: var(--ink-0); margin-top: auto; }
.service-tile .icon { width: 56px; height: 56px; }

@media (max-width: 980px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }

/* Numbers section */
.numbers {
  background: var(--bg-0);
  position: relative;
}
.numbers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
@media (max-width: 880px) { .numbers-grid { grid-template-columns: repeat(2, 1fr); } }

.stat {
  border-top: 1px solid var(--hairline);
  padding-top: 28px;
  padding-bottom: 8px;
}
.stat .big { font-family: var(--font-tech); font-weight: 400; font-size: clamp(48px, 6vw, 96px); line-height: 0.95; letter-spacing: -0.015em; color: var(--ink-0); }
.stat .big .light { color: var(--accent-soft); }
.stat .lbl { font-family: var(--font-tech); font-size: 11px; color: var(--ink-2); letter-spacing: 0.18em; text-transform: uppercase; margin-top: 18px; }
.stat .desc { font-size: 14px; color: var(--ink-2); margin-top: 12px; max-width: 240px; line-height: 1.5; }

/* Expertise — vendor tags */
.vendor-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.vendor-chip {
  padding: 10px 18px; border: 1px solid var(--hairline-strong); border-radius: 999px;
  font-family: var(--font-tech); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-1);
  background: rgba(16,14,56,0.4); transition: all 220ms ease;
}
.vendor-chip:hover { border-color: var(--accent); color: var(--accent-soft); }
.theme-light .vendor-chip { background: #ffffff; }
.theme-light .vendor-chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Planning — process steps */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 56px; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.step { padding: 32px 24px; border-right: 1px solid var(--hairline); position: relative; }
.step:last-child { border-right: none; }
.step .num { font-family: var(--font-tech); font-size: 13px; color: var(--accent); letter-spacing: 0.14em; }
.step .title { font-family: var(--font-display); font-weight: 300; font-size: 19px; color: var(--ink-0); margin-top: 16px; line-height: 1.2; }
.step .desc { font-size: 13px; color: var(--ink-2); margin-top: 12px; line-height: 1.5; }
@media (max-width: 980px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step { border-bottom: 1px solid var(--hairline); }
  .step:nth-child(2n) { border-right: none; }
}

/* Work gallery */
.work { background: var(--bg-0); }
.work-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 120px;
  gap: 14px;
  margin-top: 32px;
}
.work-cell {
  position: relative; overflow: hidden; border-radius: 4px;
  border: 1px solid var(--hairline);
  cursor: pointer;
  transition: transform 480ms cubic-bezier(.2,.7,.2,1), border-color 280ms;
}
.work-cell img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: brightness(0.85) saturate(1.05); transition: filter 480ms ease, transform 800ms cubic-bezier(.2,.7,.2,1);
}
.work-cell:hover img { filter: brightness(1) saturate(1.15); transform: scale(1.04); }
.theme-light .work-cell img { filter: brightness(0.95) saturate(1.1); }
.theme-light .work-cell:hover img { filter: brightness(1) saturate(1.2); }
.work-cell .meta {
  position: absolute; left: 16px; bottom: 16px;
  font-family: var(--font-tech); font-size: 10px; color: var(--ink-0); letter-spacing: 0.16em; text-transform: uppercase;
  text-shadow: 0 1px 8px rgba(0,0,0,0.7);
  z-index: 1;
}
.work-cell::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 50%, rgba(5,7,26,0.7) 100%);
}

/* spans */
.s-4-2 { grid-column: span 4; grid-row: span 2; }
.s-3-2 { grid-column: span 3; grid-row: span 2; }
.s-5-3 { grid-column: span 5; grid-row: span 3; }
.s-4-3 { grid-column: span 4; grid-row: span 3; }
.s-3-3 { grid-column: span 3; grid-row: span 3; }
.s-6-2 { grid-column: span 6; grid-row: span 2; }
.s-3-1 { grid-column: span 3; grid-row: span 1; }

@media (max-width: 880px) {
  .work-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 220px; }
  .work-cell { grid-column: span 1 !important; grid-row: span 1 !important; }
}

/* Why us — radial */
.why { background: var(--bg-0); }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); margin-top: 56px; }
.why-cell {
  background: var(--bg-0); padding: 36px 24px;
  display: flex; flex-direction: column; gap: 14px;
  min-height: 180px;
}
.why-cell .icon-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--gradient-radial); }
.why-cell .ttl { font-family: var(--font-display); font-weight: 400; font-size: 18px; color: var(--ink-0); line-height: 1.2; }
.why-cell .desc { font-size: 13px; color: var(--ink-2); line-height: 1.55; margin-top: auto; }
@media (max-width: 980px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }

/* Contact / CTA */
.contact {
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(65,56,196,0.35) 0%, transparent 70%),
    var(--bg-0);
}
.theme-light .contact {
  background:
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(71,158,254,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 50% 0%, rgba(212,222,249,0.6) 0%, transparent 70%),
    var(--bg-0);
}
.contact-inner { text-align: center; max-width: 1100px; margin: 0 auto; }
.contact-canvas { position: absolute; inset: 0; pointer-events: none; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 80px; padding-top: 60px; border-top: 1px solid var(--hairline); text-align: left; }
@media (max-width: 720px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }
.contact-block .tech-label { color: var(--accent); }
.contact-block .val { font-family: var(--font-display); font-weight: 300; font-size: clamp(24px, 2.4vw, 36px); color: var(--ink-0); margin-top: 12px; letter-spacing: -0.01em; line-height: 1.2; display: block; }
.contact-block .val a { transition: color 220ms ease; }
.contact-block .val a:hover { color: var(--accent); }

.btn-primary {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 18px 32px; border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--accent) 40%, var(--accent-2) 100%);
  color: var(--bg-0); font-weight: 500; font-size: 15px; letter-spacing: 0.01em;
  transition: all 320ms ease; cursor: pointer;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.1) inset, 0 12px 32px rgba(71,158,254,0.35);
}
.theme-light .btn-primary { color: #ffffff; background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(255,255,255,0.16) inset, 0 18px 56px rgba(71,158,254,0.5); }
.btn-primary .arrow { transition: transform 280ms ease; }
.btn-primary:hover .arrow { transform: translateX(4px); }

/* Footer */
.footer {
  padding: 60px var(--pad-x) 40px;
  border-top: 1px solid var(--hairline);
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
}
.footer .tech-label { color: var(--ink-3); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 900ms cubic-bezier(.2,.7,.2,1), transform 900ms cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 80ms; }
.reveal.d2 { transition-delay: 160ms; }
.reveal.d3 { transition-delay: 240ms; }
.reveal.d4 { transition-delay: 320ms; }

/* Big background mark */
.big-mark {
  position: absolute; right: -8%; bottom: -20%;
  width: 60vw; max-width: 900px; height: auto;
  opacity: 0.05; pointer-events: none; user-select: none;
}

/* Counter cursor follower */
.counter-cell .live { display: inline-flex; align-items: center; gap: 8px; color: var(--accent); font-family: var(--font-tech); font-size: 11px; }
.counter-cell .live .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); animation: pulse 1.4s infinite; }

/* Logo lockup */
.logo-lockup { display: inline-flex; align-items: center; gap: 12px; }
.logo-lockup .mark { width: 36px; height: auto; }
.logo-lockup .text { height: 14px; width: auto; filter: brightness(0) invert(1); }

/* Hero rack image */
.hero-rack {
  position: absolute; right: 0; top: 0; bottom: 0; width: 45%;
  background-image: url('assets/rack-hero.jpg');
  background-size: cover; background-position: center;
  opacity: 0.35;
  mix-blend-mode: screen;
  mask-image: linear-gradient(270deg, black 30%, transparent 100%);
  -webkit-mask-image: linear-gradient(270deg, black 30%, transparent 100%);
  pointer-events: none;
}
@media (max-width: 880px) { .hero-rack { width: 100%; opacity: 0.18; mask-image: linear-gradient(180deg, transparent 0%, black 60%); -webkit-mask-image: linear-gradient(180deg, transparent 0%, black 60%); } }

/* Tweaks panel local tweaks */
.tweaks-mount { z-index: 9999; }

/* Subtle grid bg */
.grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(212,222,249,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,222,249,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at center, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at center, black 0%, transparent 80%);
  pointer-events: none;
}
.theme-light .grid-bg {
  background-image:
    linear-gradient(rgba(10,9,38,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,9,38,0.05) 1px, transparent 1px);
}

/* Service icon strokes */
.icon-stroke { stroke: var(--ink-0); stroke-width: 1.2; fill: none; }
.icon-accent { stroke: var(--accent); stroke-width: 1.6; fill: none; }
.icon-fill-accent { fill: var(--accent); }

/* Section divider mini */
.divider-with-num { display: flex; align-items: center; gap: 18px; font-family: var(--font-tech); font-size: 11px; color: var(--ink-2); letter-spacing: 0.18em; }
.divider-with-num::before, .divider-with-num::after { content: ''; flex: 1; height: 1px; background: var(--hairline); }

/* Glow ring around hero mark */
.hero-orb {
  position: absolute; left: 50%; top: 30%; transform: translate(-50%, -50%);
  width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(71,158,254,0.18) 0%, rgba(65,56,196,0.08) 30%, transparent 60%);
  filter: blur(40px); z-index: 0; pointer-events: none;
}