/* ==========================================================================
   HANVEX ROBOTICS — Dedicated dark theme stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@500&display=swap');

:root {
  /* Core surfaces */
  --bg: #050B1A;
  --bg-alt: #0A1730;
  --panel: #0E1C3C;
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.18);

  /* Text */
  --ink: #F5F7FB;
  --muted: rgba(245,247,251,0.66);
  --muted-dim: rgba(245,247,251,0.42);

  /* Brand continuity + robotics accent */
  --navy: #1B2A4A;
  --gold: #B8874B;
  --gold-light: #D6AD78;
  --accent: #4C8DFF;
  --accent-light: #8AB4FF;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --max-width: 1180px;
  --header-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 32px; }
@media (max-width: 640px) { .container { padding: 0 20px; } }

/* ==========================================================================
   Progress bar
   ========================================================================== */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  z-index: 1200;
  transition: width 0.08s linear;
}

/* ==========================================================================
   Header — solid black
   ========================================================================== */
.back-strip {
  background: #000;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.back-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}
.back-strip a {
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}
.back-strip a:hover { color: var(--accent-light); }
.back-strip .division-tag {
  color: var(--gold-light);
  text-transform: uppercase;
}

.breadcrumb-nav {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--line);
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted-dim);
}
.breadcrumb-list li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--muted-dim);
}
.breadcrumb-list a { color: var(--muted); transition: color 0.2s ease; }
.breadcrumb-list a:hover { color: var(--accent-light); }
.breadcrumb-list li[aria-current="page"] { color: var(--ink); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #000000;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; }
.brand-logo { height: 32px; width: auto; display: block; }

.main-nav { display: flex; align-items: center; gap: 36px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--accent);
  color: #061027 !important;
  font-size: 0.86rem;
  font-weight: 700;
  border-radius: 2px;
  transition: background 0.2s ease, transform 0.2s ease;
}
.nav-cta:hover { background: var(--accent-light); transform: translateY(-1px); }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.menu-toggle span { width: 24px; height: 2px; background: var(--ink); display: block; transition: transform 0.25s ease, opacity 0.25s ease; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: calc(var(--header-h) + 34px);
    left: 0; right: 0;
    background: #000;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 24px;
    gap: 0;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.22s ease;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links { flex-direction: column; gap: 0; }
  .nav-links a {
    padding: 14px 4px 14px 14px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    border-left: 3px solid transparent;
  }
  .nav-links a.active::after { content: none; }
  .nav-links a.active { border-left-color: var(--accent); background: rgba(255,255,255,0.03); }
  .nav-cta { margin-top: 16px; justify-content: center; }
}

/* ==========================================================================
   Typography helpers
   ========================================================================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-light);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--accent-light); }
.eyebrow.gold { color: var(--gold-light); }
.eyebrow.gold::before { background: var(--gold-light); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.3rem, 4.8vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.28rem; }
p { color: var(--muted); }
.lede { font-size: 1.1rem; color: var(--muted); max-width: 620px; }

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
@media (max-width: 640px) { .section { padding: 64px 0; } }
.section-head { max-width: 640px; margin-bottom: 52px; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: 2px;
  transition: all 0.2s ease;
}
.btn-primary { background: var(--accent); color: #061027; }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); }
.btn-outline { border: 1px solid var(--line-strong); color: var(--ink); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-light); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  padding: 96px 0 88px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 12%, rgba(76,141,255,0.16) 0%, transparent 45%),
    radial-gradient(circle at 8% 90%, rgba(184,135,75,0.10) 0%, transparent 40%),
    var(--bg);
}
.hero-motif {
  position: absolute;
  top: 0; right: -8%;
  width: 58%;
  height: 100%;
  pointer-events: none;
  opacity: 0.9;
}
.hero-inner { position: relative; z-index: 2; max-width: 700px; }
.hero h1 { margin-bottom: 22px; }
.hero .lede { margin-bottom: 34px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }

.hero-stats { display: flex; gap: 0; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 32px; }
.hero-stat { flex: 1; min-width: 130px; padding-right: 24px; }
.hero-stat .num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-light);
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.hero-stat .label { font-size: 0.78rem; color: var(--muted-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }

/* ==========================================================================
   Grids & cards
   ========================================================================== */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.service-card {
  padding: 28px 26px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel) 0%, rgba(14,28,60,0.4) 100%);
  border-radius: 3px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  background: linear-gradient(160deg, #122A54 0%, rgba(18,32,68,0.6) 100%);
}
.service-card .tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--gold-light);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.service-card .tag.new { color: var(--accent-light); }
.service-card h3 { font-size: 1.04rem; font-family: var(--font-body); font-weight: 700; margin-bottom: 10px; }
.service-card p { font-size: 0.88rem; }

/* ==========================================================================
   Tech stack marquee
   ========================================================================== */
.tech-marquee-wrap {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
  background: var(--bg-alt);
}
.tech-marquee-track {
  display: flex;
  gap: 56px;
  width: max-content;
  animation: marquee 32s linear infinite;
}
.tech-marquee-wrap:hover .tech-marquee-track { animation-play-state: paused; }
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.tech-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.tech-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }

/* ==========================================================================
   Metrics (count-up)
   ========================================================================== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 780px) { .metrics-grid { grid-template-columns: repeat(2, 1fr); } }
.metric-cell {
  background: var(--bg);
  padding: 40px 28px;
  text-align: left;
}
.metric-num {
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--ink);
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.metric-num .unit { font-size: 1.2rem; color: var(--accent-light); }
.metric-num .prefix { font-size: 1.6rem; color: var(--ink); }
.metric-label { font-size: 0.82rem; color: var(--muted-dim); margin-top: 8px; text-transform: uppercase; letter-spacing: 0.05em; }

/* ==========================================================================
   Case studies
   ========================================================================== */
.case-card {
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.case-thumb {
  height: 170px;
  position: relative;
  overflow: hidden;
}
.case-thumb svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.case-status {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--bg);
  background: var(--gold-light);
  padding: 5px 10px;
  border-radius: 20px;
}
.case-body { padding: 24px 22px 26px; flex: 1; display: flex; flex-direction: column; }
.case-body .sector {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.case-body h3 { font-size: 1.05rem; font-family: var(--font-body); font-weight: 700; margin-bottom: 10px; }
.case-body p { font-size: 0.88rem; flex: 1; }
.case-stats { display: flex; gap: 20px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.case-stats div { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.case-stats strong { display: block; color: var(--ink); font-size: 1rem; font-family: var(--font-display); }

/* ==========================================================================
   Hardware highlights
   ========================================================================== */
.hw-card {
  padding: 26px;
  border: 1px solid var(--line);
  background: transparent;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.hw-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: 2px;
  background: rgba(76,141,255,0.10);
  border: 1px solid rgba(76,141,255,0.25);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-light);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
}
.hw-card h3 { font-size: 0.98rem; margin-bottom: 6px; }
.hw-card p { font-size: 0.86rem; }

/* ==========================================================================
   Process steps
   ========================================================================== */
.process-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .process-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .process-row { grid-template-columns: 1fr; } }
.process-step { border-top: 2px solid var(--line-strong); padding-top: 20px; }
.process-step .step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-light);
  margin-bottom: 12px;
  display: block;
}
.process-step h3 { font-size: 1rem; margin-bottom: 8px; }
.process-step p { font-size: 0.86rem; }

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band {
  background: linear-gradient(120deg, #081228 0%, #0E1F44 100%);
  padding: 76px 0;
  text-align: center;
  border-top: 1px solid var(--line);
}
.cta-band h2 { margin-bottom: 16px; }
.cta-band p { max-width: 480px; margin: 0 auto 32px; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: #000; color: rgba(255,255,255,0.55); padding: 56px 0 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand { font-family: var(--font-display); font-size: 1.2rem; color: var(--ink); margin-bottom: 14px; }
.footer-grid p { color: rgba(255,255,255,0.42); font-size: 0.86rem; max-width: 280px; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.35);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.88rem; color: rgba(255,255,255,0.6); transition: color 0.2s ease; }
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}

/* ==========================================================================
   Floating buttons
   ========================================================================== */
.floating-buttons {
  position: fixed;
  right: 22px;
  bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1100;
}
.fab {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: 0 6px 22px rgba(0,0,0,0.5);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.fab-top {
  width: 44px; height: 44px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--accent-light);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.fab-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.fab-top:hover { border-color: var(--accent); transform: translateY(-2px); }
.fab-contact {
  width: auto; height: 48px; padding: 0 20px;
  border-radius: 24px;
  background: var(--accent);
  color: #061027;
  font-size: 0.86rem;
  font-weight: 700;
  gap: 8px;
}
.fab-contact:hover { background: var(--accent-light); transform: translateY(-2px); }
@media (max-width: 480px) {
  .floating-buttons { right: 14px; bottom: 14px; }
  .fab-contact span.fab-label { display: none; }
  .fab-contact { width: 48px; height: 48px; padding: 0; border-radius: 50%; }
}

.fade-in { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
::selection { background: var(--accent); color: #061027; }