/* ============================================================
   MARX8 — premium industrial-tech corporate site
   ============================================================ */

:root {
  --bg: #070a12;
  --bg-soft: #0b0f1a;
  --surface: rgba(255, 255, 255, 0.028);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eaeef7;
  --text-dim: #97a3ba;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-3: #22d3ee;
  --grad: linear-gradient(120deg, #22d3ee 0%, #60a5fa 48%, #818cf8 100%);
  --glow: rgba(56, 189, 248, 0.40);
  --font-display: "Sora", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --container: 1200px;
  --radius: 18px;
}

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

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

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

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

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

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: #04121c; padding: 10px 16px; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { left: 16px; top: 16px; }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.eyebrow {
  font-family: var(--font-display);
  text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.74rem; font-weight: 600;
  color: var(--accent-3); margin-bottom: 18px;
}
.eyebrow .x, .x { color: var(--accent-2); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 14px 26px; border-radius: 999px; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}
.btn-sm { padding: 10px 18px; font-size: 0.88rem; }
.btn-primary {
  color: #04121c; background: var(--grad); background-size: 160% 160%;
  box-shadow: 0 10px 30px -10px var(--glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -10px var(--glow); background-position: 100% 0; }
.btn-ghost { color: var(--text); background: var(--surface); border-color: var(--border-strong); }
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--accent); background: var(--surface-2); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(7, 10, 18, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 800; font-size: 1.28rem; letter-spacing: -0.01em; }
.brand-mark { display: inline-flex; filter: drop-shadow(0 4px 12px var(--glow)); }
.brand-8 { color: var(--accent-3); }
.nav { display: flex; gap: 30px; margin-left: auto; }
.nav a { font-size: 0.94rem; color: var(--text-dim); font-weight: 500; position: relative; padding: 4px 0; transition: color 0.2s; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--grad); transition: width 0.28s ease; }
.nav a:hover { color: var(--text); }
.nav a:hover::after { width: 100%; }
.header-cta { margin-left: 4px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; margin-left: auto; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none; flex-direction: column; gap: 6px; padding: 14px 24px 24px;
  background: rgba(7, 10, 18, 0.96); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border);
}
.mobile-nav a { padding: 12px 4px; color: var(--text-dim); border-bottom: 1px solid var(--border); font-family: var(--font-display); }
.mobile-nav .btn { margin-top: 12px; justify-content: center; }
.mobile-nav.open { display: flex; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding: 130px 0 90px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.aurora { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.55; will-change: transform; }
.aurora-1 { width: 620px; height: 620px; top: -160px; left: -120px; background: radial-gradient(circle, #22d3ee, transparent 62%); animation: drift1 20s ease-in-out infinite; }
.aurora-2 { width: 560px; height: 560px; top: 40px; right: -140px; background: radial-gradient(circle, #6366f1, transparent 62%); animation: drift2 24s ease-in-out infinite; }
.aurora-3 { width: 480px; height: 480px; bottom: -220px; left: 38%; background: radial-gradient(circle, #0ea5e9, transparent 62%); opacity: 0.4; animation: drift3 28s ease-in-out infinite; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(ellipse 75% 60% at 50% 42%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 60% at 50% 42%, #000 30%, transparent 78%);
  opacity: 0.6;
}
@keyframes drift1 { 50% { transform: translate(60px, 50px) scale(1.1); } }
@keyframes drift2 { 50% { transform: translate(-50px, 40px) scale(1.08); } }
@keyframes drift3 { 50% { transform: translate(40px, -50px) scale(1.12); } }

.hero-inner { position: relative; z-index: 1; max-width: 900px; }
.hero-title { font-size: clamp(2.6rem, 6.2vw, 5rem); font-weight: 800; margin-bottom: 26px; }
.hero-sub { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--text-dim); max-width: 680px; margin-bottom: 30px; }
.hero-sub strong { color: var(--text); font-weight: 600; }

.hero-rotator { display: inline-flex; align-items: center; gap: 14px; padding: 10px 18px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); margin-bottom: 34px; }
.rotator-label { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.14em; }
.rotator-word { font-family: var(--font-display); font-weight: 600; color: var(--accent-3); min-width: 210px; transition: opacity 0.4s ease, transform 0.4s ease; }
.rotator-word.swap { opacity: 0; transform: translateY(-6px); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.scroll-cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); width: 24px; height: 38px; border: 2px solid var(--border-strong); border-radius: 14px; z-index: 1; }
.scroll-cue span { position: absolute; top: 7px; left: 50%; width: 4px; height: 7px; margin-left: -2px; background: var(--accent); border-radius: 2px; animation: cue 1.7s ease-in-out infinite; }
@keyframes cue { 0%,100% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 80% { opacity: 0; transform: translateY(12px); } }

/* ---------- Stats ---------- */
.stats-band { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-soft); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 46px 24px; }
.stat { text-align: center; }
.stat-num { display: block; font-family: var(--font-display); font-weight: 800; font-size: clamp(2.1rem, 4vw, 3.1rem); background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { color: var(--text-dim); font-size: 0.92rem; }

/* ---------- Sections ---------- */
.section { padding: 118px 0; position: relative; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 720px; margin-bottom: 62px; }
.section-head h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 18px; }
.section-lead { color: var(--text-dim); font-size: 1.08rem; }

/* ---------- Services ---------- */
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.service-card {
  position: relative; padding: 34px 32px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
}
.service-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad); opacity: 0; transition: opacity 0.35s ease;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.service-card:hover { transform: translateY(-7px); background: var(--surface-2); box-shadow: 0 30px 60px -30px rgba(56, 189, 248, 0.35); }
.service-card:hover::before { opacity: 1; }
.service-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.service-icon { display: inline-flex; align-items: center; justify-content: center; width: 54px; height: 54px; border-radius: 14px; background: linear-gradient(140deg, rgba(34,211,238,0.16), rgba(129,140,248,0.16)); border: 1px solid var(--border-strong); color: var(--accent-3); }
.service-icon svg { width: 27px; height: 27px; }
.service-index { font-family: var(--font-display); font-weight: 800; font-size: 1.4rem; color: rgba(255,255,255,0.10); }
.service-card h3 { font-size: 1.45rem; margin-bottom: 12px; }
.service-card > p { color: var(--text-dim); margin-bottom: 20px; }
.service-list { list-style: none; display: grid; gap: 10px; }
.service-list li { position: relative; padding-left: 24px; font-size: 0.95rem; color: var(--text); }
.service-list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--grad); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step { padding: 30px 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: transform 0.3s, border-color 0.3s; }
.step:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.step-num { font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: block; margin-bottom: 14px; }
.step h3 { font-size: 1.25rem; margin-bottom: 10px; }
.step p { color: var(--text-dim); font-size: 0.95rem; }

/* ---------- Marquee ---------- */
.marquee { margin-top: 8px; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 46px; width: max-content; animation: marquee 34s linear infinite; }
.marquee-track span { font-family: var(--font-display); font-weight: 600; font-size: 1.35rem; color: var(--text-dim); white-space: nowrap; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.about-copy h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); margin-bottom: 22px; }
.about-copy > p { color: var(--text-dim); margin-bottom: 18px; }
.about-copy strong { color: var(--text); }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.about-point { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
.tick { color: var(--accent-3); }

.about-visual { display: flex; justify-content: center; }
.visual-card {
  width: 100%; max-width: 380px; padding: 26px; border-radius: 22px;
  background: linear-gradient(160deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--border-strong); box-shadow: 0 40px 80px -40px rgba(56,189,248,0.4);
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 50% { transform: translateY(-12px); } }
.visual-row { display: flex; align-items: center; gap: 9px; font-weight: 600; font-family: var(--font-display); margin-bottom: 20px; }
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot.green { background: #34d399; box-shadow: 0 0 12px #34d399; }
.visual-bar { position: relative; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; margin-bottom: 14px; padding-top: 18px; }
.visual-bar label { position: absolute; top: 0; left: 0; font-size: 0.78rem; color: var(--text-dim); }
.visual-bar b { font-family: var(--font-display); color: var(--accent-3); font-size: 0.9rem; }
.visual-bar i { grid-column: 1 / 2; height: 8px; border-radius: 6px; background: rgba(255,255,255,0.08); position: relative; overflow: hidden; }
.visual-bar i::after { content: ""; position: absolute; inset: 0; width: var(--w); background: var(--grad); border-radius: 6px; }
.visual-grid-mini { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin: 20px 0 16px; }
.mini { font-size: 0.66rem; text-align: center; padding: 7px 4px; border-radius: 7px; border: 1px solid var(--border); color: var(--text-dim); }
.mini.running { color: #34d399; border-color: rgba(52,211,153,0.35); background: rgba(52,211,153,0.08); }
.mini.idle { color: #fbbf24; border-color: rgba(251,191,36,0.35); background: rgba(251,191,36,0.08); }
.visual-foot { display: flex; align-items: center; gap: 9px; font-size: 0.8rem; color: var(--text-dim); padding-top: 16px; border-top: 1px solid var(--border); }
.pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--accent-3); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(34,211,238,0.5); } 50% { box-shadow: 0 0 0 7px rgba(34,211,238,0); } }

/* ---------- CTA ---------- */
.cta { padding: 120px 0; position: relative; overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse 60% 100% at 50% 100%, rgba(99,102,241,0.22), transparent 70%); }
.cta-inner { position: relative; text-align: center; max-width: 720px; }
.cta-inner h2 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); margin-bottom: 18px; }
.cta-inner p { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 32px; }
.cta-inner .hero-actions { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid var(--border); }
.footer-tag { color: var(--text-dim); font-size: 0.92rem; margin-top: 16px; max-width: 300px; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--text); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-dim); font-size: 0.92rem; padding: 5px 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent-3); }
.footer-muted { color: rgba(255,255,255,0.35); font-size: 0.86rem; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; font-size: 0.86rem; color: var(--text-dim); flex-wrap: wrap; gap: 10px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1); }
.reveal.in-view { opacity: 1; transform: none; }
.services-grid .reveal.in-view:nth-child(2) { transition-delay: 0.08s; }
.services-grid .reveal.in-view:nth-child(3) { transition-delay: 0.16s; }
.services-grid .reveal.in-view:nth-child(4) { transition-delay: 0.24s; }
.steps .reveal.in-view:nth-child(2) { transition-delay: 0.08s; }
.steps .reveal.in-view:nth-child(3) { transition-delay: 0.16s; }
.steps .reveal.in-view:nth-child(4) { transition-delay: 0.24s; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .services-grid, .about-grid { grid-template-columns: 1fr; gap: 22px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 16px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .about-visual { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .steps, .about-points, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
  .service-card { padding: 28px 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .rotator-word { min-width: 0; }
  .hero-rotator { flex-wrap: wrap; }
}

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