/* ============================================================
   q4ai — Design System
   Contemporary dark-mode-first tech consulting website
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ============================================================
   1. Design Tokens
   ============================================================ */
:root {
  --c-base:        #050510;
  --c-surface:     #0d0d1f;
  --c-surface-2:   #131330;
  --c-card:        rgba(255, 255, 255, 0.04);
  --c-border:      rgba(255, 255, 255, 0.08);
  --c-border-act:  rgba(139, 92, 246, 0.45);

  --c-purple:  #8b5cf6;
  --c-cyan:    #06b6d4;
  --c-indigo:  #6366f1;

  --grad:      linear-gradient(135deg, #8b5cf6, #06b6d4);
  --grad-soft: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(6,182,212,0.15));

  --c-text:      #f1f0ff;
  --c-muted:     #94a3b8;
  --c-dim:       #56607a;

  --f-head: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --f-body: 'Inter', system-ui, -apple-system, sans-serif;

  --r-sm:   8px;
  --r-md:   16px;
  --r-lg:   24px;
  --r-full: 9999px;

  --shadow-glow:  0 4px 40px rgba(139, 92, 246, 0.22);
  --shadow-card:  0 4px 24px rgba(0,0,0,0.45);

  --ease:     cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --t:        0.3s var(--ease);

  --max-w: 1200px;
  --nav-h: 72px;
}

/* ============================================================
   2. Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--c-base);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }

::selection { background: rgba(139,92,246,0.3); color: var(--c-text); }

/* ============================================================
   3. Typography
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--f-head);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

h1 { font-size: clamp(2.75rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem,   4vw, 3.25rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.65rem); }
h4 { font-size: 1.125rem; letter-spacing: -0.01em; }

p { color: var(--c-muted); line-height: 1.8; }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #a78bfa;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-purple);
  flex-shrink: 0;
  animation: blink 2.2s ease-in-out infinite;
}
@keyframes blink {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:0.4; transform:scale(0.75); }
}

.label-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: rgba(139,92,246,0.1);
  border: 1px solid rgba(139,92,246,0.25);
  border-radius: var(--r-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #a78bfa;
}

/* ============================================================
   4. Layout
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

section { padding: 6rem 0; }
.section-alt { background: var(--c-surface); }
.section-alt2 { background: var(--c-surface-2); }

.section-header {
  max-width: 680px;
  margin: 0 auto 4rem;
  text-align: center;
}
.section-header .label-badge { margin-bottom: 1.25rem; }
.section-header p { margin-top: 1rem; font-size: 1.0625rem; }

/* Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }

/* ============================================================
   5. Header / Navigation
   ============================================================ */
.site-header {
  position: fixed; top:0; left:0; right:0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--t), border-color var(--t), backdrop-filter var(--t);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(5,5,16,0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom-color: var(--c-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

/* Logo */
.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo svg { height: 34px; width: auto; }

/* Desktop nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}
.nav-link {
  position: relative;
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--c-muted);
  border-radius: var(--r-sm);
  transition: color var(--t), background var(--t);
}
.nav-link:hover { color: var(--c-text); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--c-text); }
.nav-link.active::after {
  content:'';
  position: absolute; bottom: 4px; left:50%; transform: translateX(-50%);
  width: 16px; height: 2px;
  background: var(--grad);
  border-radius: var(--r-full);
}

/* Nav CTA button */
.btn-nav {
  flex-shrink: 0;
  padding: 0.5rem 1.25rem;
  background: var(--grad);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-full);
  transition: opacity var(--t), transform var(--t), box-shadow var(--t);
  white-space: nowrap;
}
.btn-nav:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: var(--shadow-glow); }

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  padding: 0;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transform-origin: center;
  transition: transform var(--t), opacity var(--t);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity:0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed; inset:0;
  background: rgba(5,5,16,0.97);
  backdrop-filter: blur(24px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity var(--t);
}
.nav-overlay.open { opacity: 1; }
.nav-overlay .nav-link {
  font-size: 2rem;
  font-family: var(--f-head);
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  color: var(--c-muted);
  border-radius: 0;
}
.nav-overlay .nav-link::after { display: none; }
.nav-overlay .nav-link:hover,
.nav-overlay .nav-link.active { color: var(--c-text); background: none; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top:1rem; z-index: 9999;
  background: var(--c-purple); color: white;
  padding: 0.5rem 1rem; border-radius: var(--r-sm); font-size: 0.875rem; font-weight:600;
}
.skip-link:focus { left:1rem; }

/* ============================================================
   6. Buttons
   ============================================================ */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--grad);
  color: white; font-size: 1rem; font-weight: 600;
  border-radius: var(--r-sm);
  transition: transform var(--t), box-shadow var(--t), opacity var(--t);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: transparent;
  color: var(--c-text); font-size: 1rem; font-weight: 600;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  transition: border-color var(--t), background var(--t), transform var(--t);
}
.btn-outline:hover {
  border-color: rgba(139,92,246,0.5);
  background: rgba(139,92,246,0.07);
  transform: translateY(-2px);
}

/* ============================================================
   7. Cards
   ============================================================ */
.card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2rem;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  backdrop-filter: blur(12px);
}
.card:hover { border-color: var(--c-border-act); transform: translateY(-4px); box-shadow: var(--shadow-glow); }

a.card { display: block; color: inherit; }

.card-icon {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.25);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}
.card-icon svg { width: 24px; height: 24px; }

.card h3 { font-size: 1.2rem; margin-bottom: 0.625rem; }
.card p  { font-size: 0.9375rem; margin-bottom: 1.25rem; }

.card-arrow {
  display: inline-flex; align-items: center; gap: 0.375rem;
  font-size: 0.875rem; font-weight: 600;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ============================================================
   8. Hero — Landing Page
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none; overflow: hidden;
}

/* Soft gradient orbs */
.hero-bg::before {
  content:'';
  position: absolute; top:10%; left:50%; transform: translateX(-50%);
  width: 900px; height: 600px;
  background: radial-gradient(ellipse, rgba(139,92,246,0.1) 0%, transparent 65%);
}
.hero-bg::after {
  content:'';
  position: absolute; bottom:5%; right:-15%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(6,182,212,0.07) 0%, transparent 65%);
}

/* Perspective grid */
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 80%);
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 840px; margin: 0 auto;
  text-align: center;
  padding: 8rem 0 6rem;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.5rem 1.25rem;
  background: rgba(139,92,246,0.1);
  border: 1px solid rgba(139,92,246,0.22);
  border-radius: var(--r-full);
  margin-bottom: 2rem;
}

.hero h1 { margin-bottom: 1.5rem; }
.hero h1 .line2 { display: block; }

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-muted);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.hero-actions {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; flex-wrap: wrap;
}

/* Floating decorative shapes */
.shape {
  position: absolute;
  border-radius: 50%;
  background: var(--grad);
  pointer-events: none;
  animation: drift var(--dur, 20s) var(--del, 0s) ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translate(0,0) rotate(0deg); }
  to   { transform: translate(var(--tx,30px), var(--ty,-20px)) rotate(var(--rot,12deg)); }
}

/* ============================================================
   9. Capabilities bar
   ============================================================ */
.caps-bar {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 3rem 0;
}

.caps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2rem;
  text-align: center;
}

.cap-item { padding: 1rem; }
.cap-icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: var(--grad-soft);
  border: 1px solid rgba(139,92,246,0.2);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
}
.cap-icon svg { width: 22px; height: 22px; }
.cap-title {
  font-family: var(--f-head);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 0.25rem;
}
.cap-sub { font-size: 0.78rem; color: var(--c-dim); }

/* ============================================================
   10. Services cards (home page 2-col)
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.service-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: start;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2rem;
  text-decoration: none; color: inherit;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.service-card:hover { border-color: var(--c-border-act); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.service-card .card-icon { margin-bottom: 0; }
.service-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.service-card p  { font-size: 0.9rem; margin: 0; }

/* ============================================================
   11. About section
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-text .label-badge { margin-bottom: 1.5rem; }
.about-text h2 { margin-bottom: 1.25rem; }
.about-text > p { margin-bottom: 1.25rem; font-size: 1.0625rem; }

.about-pillars {
  display: flex; flex-direction: column; gap: 1rem;
  margin-top: 2rem;
}
.pillar {
  display: flex; align-items: flex-start; gap: 1rem;
  padding: 1.25rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  transition: border-color var(--t);
}
.pillar:hover { border-color: var(--c-border-act); }
.pillar-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--grad); flex-shrink: 0; margin-top: 0.4rem;
}
.pillar h4 { margin-bottom: 0.25rem; font-size: 1rem; }
.pillar p  { font-size: 0.875rem; margin: 0; }

.about-visual {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}
.visual-stat {
  text-align: center; padding: 1.25rem 0;
  border-bottom: 1px solid var(--c-border);
}
.visual-stat:last-child { border-bottom: none; }
.visual-stat-num {
  font-family: var(--f-head);
  font-size: 2.5rem; font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 0.375rem;
}
.visual-stat-label { font-size: 0.875rem; color: var(--c-muted); }

/* ============================================================
   12. CTA strip
   ============================================================ */
.cta-strip {
  padding: 6rem 0;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-strip::before {
  content:'';
  position: absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width: 700px; height: 500px;
  background: radial-gradient(ellipse, rgba(139,92,246,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-strip h2 { margin-bottom: 1rem; }
.cta-strip > p { font-size: 1.0625rem; max-width: 500px; margin: 0 auto 2.5rem; }

/* ============================================================
   13. Footer
   ============================================================ */
.site-footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  margin: 1.25rem 0 0.75rem;
  font-size: 0.9375rem;
  max-width: 280px;
}
.footer-email {
  font-size: 0.875rem;
  color: #a78bfa;
  transition: color var(--t);
}
.footer-email:hover { color: var(--c-cyan); }

.footer-col h5 {
  font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--c-dim);
  margin-bottom: 1.25rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a { font-size: 0.9375rem; color: var(--c-muted); transition: color var(--t); }
.footer-col a:hover { color: var(--c-text); }

.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.8125rem; color: var(--c-dim);
}

/* ============================================================
   14. Page hero (service pages)
   ============================================================ */
.page-hero {
  padding: calc(var(--nav-h) + 5rem) 0 5rem;
  text-align: center;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content:'';
  position: absolute; top:0; left:50%; transform: translateX(-50%);
  width: 900px; height: 450px;
  background: radial-gradient(ellipse, rgba(139,92,246,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero .label-badge { margin-bottom: 1.5rem; }
.page-hero h1 { margin-bottom: 1.5rem; }
.page-hero > .container > p {
  font-size: 1.2rem;
  max-width: 660px;
  margin: 0 auto;
}

/* ============================================================
   15. Service detail sections
   ============================================================ */
.detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.detail-row + .detail-row { margin-top: 5rem; }
.detail-row.flip { direction: rtl; }
.detail-row.flip > * { direction: ltr; }

.detail-text .label-badge { margin-bottom: 1.25rem; }
.detail-text h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1.25rem; }
.detail-text > p { margin-bottom: 1.25rem; font-size: 1.0625rem; }

.feat-list {
  display: flex; flex-direction: column; gap: 0.625rem;
  margin-top: 1.5rem;
}
.feat-list li {
  display: flex; align-items: flex-start; gap: 0.875rem;
  font-size: 0.9375rem; color: var(--c-muted);
}
.feat-list li::before {
  content:'';
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-purple); flex-shrink: 0; margin-top: 0.52rem;
}

.detail-panel {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
  min-height: 300px;
  display: flex; flex-direction: column; gap: 1.5rem;
}

.panel-tag {
  font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--c-cyan);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  border-radius: var(--r-full);
  padding: 0.25rem 0.75rem;
  display: inline-block; margin-bottom: 0.5rem;
}
.panel-stat {
  font-family: var(--f-head);
  font-size: 3rem; font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 0.375rem;
}
.panel-label { font-size: 0.875rem; color: var(--c-muted); }
.panel-divider { height: 1px; background: var(--c-border); }

/* ============================================================
   16. Use cases grid
   ============================================================ */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.usecase-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 1.75rem;
  transition: border-color var(--t), transform var(--t);
}
.usecase-card:hover { border-color: var(--c-border-act); transform: translateY(-3px); }

.uc-tag {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--c-cyan);
  background: rgba(6,182,212,0.09);
  border: 1px solid rgba(6,182,212,0.2);
  border-radius: var(--r-full);
  padding: 0.2rem 0.65rem;
  margin-bottom: 0.875rem;
}
.usecase-card h4 { font-size: 1rem; margin-bottom: 0.5rem; }
.usecase-card p  { font-size: 0.875rem; }

/* ============================================================
   17. Scroll animations
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ============================================================
   18. Responsive
   ============================================================ */
@media (max-width: 1100px) {
  .caps-grid    { grid-template-columns: repeat(3,1fr); }
  .footer-grid  { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .about-grid,
  .detail-row   { grid-template-columns: 1fr; gap: 3rem; }
  .detail-row.flip { direction: ltr; }
  .grid-4       { grid-template-columns: repeat(2,1fr); }
  .usecase-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }

  .hamburger  { display: flex; }
  .nav-links  { display: none; }
  .btn-nav    { display: none; }
  .nav-overlay { display: flex; }

  section { padding: 4rem 0; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .caps-grid     { grid-template-columns: repeat(2,1fr); }
  .about-grid    { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid   { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
  .usecase-grid  { grid-template-columns: 1fr; }
  .detail-row    { grid-template-columns: 1fr; gap: 2.5rem; }
  .detail-row.flip { direction: ltr; }

  .hero-content { padding: 6rem 0 4rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .service-card { grid-template-columns: 1fr; }
  .service-card .card-icon { margin-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ── Marquee ticker ── */
.marquee-strip {
  overflow: hidden;
  background: rgba(139,92,246,.07);
  border-top: 1px solid rgba(139,92,246,.18);
  border-bottom: 1px solid rgba(139,92,246,.18);
  padding: .75rem 0;
  white-space: nowrap;
}
.marquee-inner {
  display: inline-flex;
  animation: marqueeScroll 32s linear infinite;
}
.marquee-inner:hover { animation-play-state: paused; }
.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: 0 2.25rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.marquee-item .m-dot { color: var(--c-cyan); font-size: .9rem; }
@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ── Service carousel ── */
.carousel-section {
  padding: 5rem 0 4rem;
}
.carousel-section .carousel-heading {
  text-align: center;
  margin-bottom: 2.5rem;
}
.carousel-section .label-badge { display: block; margin-bottom: .75rem; }
.carousel-section h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 0; }
.carousel-track-outer {
  overflow: hidden;
  border-radius: 1.25rem;
}
.carousel-track {
  display: flex;
  transition: transform .55s cubic-bezier(.4,0,.2,1);
}
.carousel-slide {
  min-width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: .25rem .25rem;
}
.c-panel {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 1.25rem;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(8px);
}
.c-panel-badge {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-cyan);
  border: 1px solid rgba(6,182,212,.3);
  border-radius: 2rem;
  padding: .25rem .75rem;
  margin-bottom: 1.25rem;
}
.c-panel h3 {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: .9rem;
}
.c-panel p {
  color: var(--c-muted);
  font-size: .93rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.c-panel-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--c-cyan);
  text-decoration: none;
  transition: gap .2s;
}
.c-panel-link:hover { gap: .65rem; }
.c-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.c-stat {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: .875rem;
  padding: 1.25rem 1rem;
  text-align: center;
}
.c-stat-val {
  font-size: 1.55rem;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.c-stat-lbl {
  font-size: .72rem;
  color: var(--c-muted);
  margin-top: .35rem;
  line-height: 1.4;
}
.carousel-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.75rem;
}
.carousel-btn {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--c-text);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .2s;
  font-size: 1.1rem;
  padding: 0;
  line-height: 1;
}
.carousel-btn:hover { background: rgba(139,92,246,.35); border-color: rgba(139,92,246,.5); }
.carousel-dots {
  display: flex;
  gap: .5rem;
  align-items: center;
}
.carousel-dot {
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: rgba(255,255,255,.2);
  border: none;
  cursor: pointer;
  transition: background .25s, transform .25s;
  padding: 0;
}
.carousel-dot.active {
  background: var(--c-purple);
  transform: scale(1.4);
}
@media (max-width: 768px) {
  .carousel-slide { grid-template-columns: 1fr; }
  .c-stat-grid { grid-template-columns: 1fr 1fr; }
  .c-panel { padding: 1.75rem 1.5rem; }
}