:root {
  --bg: #05070c;
  --bg-elevated: #0b0f1a;
  --card: rgba(255, 255, 255, 0.035);
  --card-border: rgba(255, 255, 255, 0.09);
  --text: #e7eaf3;
  --text-dim: #8b93a7;
  --text-dimmer: #5c6479;
  --accent: #22d3ee;
  --accent-2: #8b5cf6;
  --accent-3: #34d399;
  --accent-warn: #fbbf24;
  --gradient: linear-gradient(135deg, var(--accent), var(--accent-2));
  --radius: 16px;
  --max-w: 1160px;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-heading: "Plus Jakarta Sans", "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
}

/* ============ Base (mobile-first) ============ */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

img { max-width: 100%; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}
h1 { font-size: clamp(2.3rem, 8vw, 3.8rem); line-height: 1.15; }
h2 { font-size: clamp(1.85rem, 6vw, 2.7rem); line-height: 1.22; }
h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
p { color: var(--text-dim); margin: 0 0 16px; }

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

/* Background decoration */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 75%);
}
.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 700px;
  z-index: -1;
  background: radial-gradient(circle, rgba(34,211,238,0.16), rgba(139,92,246,0.10) 45%, transparent 70%);
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 15px 26px;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.96rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--gradient);
  color: #05070c;
  box-shadow: 0 8px 24px -8px rgba(34,211,238,0.45);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(34,211,238,0.55); }
.btn-ghost {
  background: rgba(255,255,255,0.03);
  border-color: var(--card-border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); background: rgba(34,211,238,0.06); }
.btn-sm { width: auto; padding: 9px 18px; font-size: 0.86rem; }
.btn-lg { padding: 17px 30px; font-size: 1.02rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(5,7,12,0.55);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--card-border);
  background: rgba(5,7,12,0.85);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.02rem;
}
.logo-mark {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 1.2rem;
}
.nav-desktop, .nav-cta { display: none; }

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px 20px 20px;
  border-top: 1px solid var(--card-border);
}
.nav-mobile a { padding: 13px 4px; color: var(--text-dim); font-weight: 500; border-bottom: 1px solid rgba(255,255,255,0.04); }
.nav-mobile .btn { margin-top: 12px; }

body.nav-open .nav-mobile { display: flex; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-top: 44px;
  padding-bottom: 56px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.25);
  padding: 7px 14px;
  border-radius: 999px;
  margin: 0 0 20px;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-3);
  flex-shrink: 0;
}
.dot-live { box-shadow: 0 0 0 0 rgba(52,211,153,0.6); animation: pulse 1.8s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52,211,153,0.55); }
  70% { box-shadow: 0 0 0 8px rgba(52,211,153,0); }
  100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); }
}
.hero-sub { font-size: 1.06rem; max-width: 54ch; }
.hero-actions { display: flex; flex-direction: column; gap: 12px; margin: 28px 0 16px; }
.hero-trust { font-size: 0.85rem; color: var(--text-dimmer); margin: 0; }

/* Hero visual: friendly chat mockup (not a code/terminal look) */
.hero-visual { display: flex; justify-content: center; }
.chat-mock {
  width: 100%;
  max-width: 420px;
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.02);
}
.chat-mock-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--card-border);
  background: rgba(255,255,255,0.02);
}
.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  flex-shrink: 0;
}
.chat-header-text { display: flex; flex-direction: column; gap: 3px; }
.chat-name { font-family: var(--font-heading); font-weight: 600; font-size: 0.92rem; color: var(--text); }
.chat-status { display: flex; align-items: center; gap: 6px; font-size: 0.76rem; color: var(--text-dimmer); }
.chat-mock-body { padding: 20px 18px; display: flex; flex-direction: column; gap: 10px; }
.chat-bubble { max-width: 84%; padding: 11px 15px; border-radius: 16px; font-size: 0.9rem; line-height: 1.42; }
.chat-bubble-in {
  align-self: flex-end;
  background: var(--gradient);
  color: #05070c;
  font-weight: 500;
  border-bottom-right-radius: 4px;
}
.chat-bubble-out {
  align-self: flex-start;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--card-border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.chat-mock-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--card-border);
  font-size: 0.78rem;
  color: var(--text-dimmer);
}

/* Sections generic */
section { padding: 64px 0; }
.section-eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.section-lead { max-width: 62ch; font-size: 1.03rem; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

/* Problem */
.problem { padding-top: 8px; padding-bottom: 8px; }
.problem h2 { text-align: center; margin-bottom: 30px; }
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.problem-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px 20px;
}
.problem-icon { font-size: 1.5rem; display: block; margin-bottom: 12px; }
.problem-card p { margin: 0; font-size: 0.96rem; color: var(--text-dim); }

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 36px;
}
.service-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.service-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,0.35); }
.service-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--gradient);
  font-size: 1.35rem;
  margin-bottom: 18px;
}
.service-card p { font-size: 0.96rem; }
.service-tags { list-style: none; padding: 0; margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.service-tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--card-border);
  padding: 5px 10px;
  border-radius: 6px;
}

/* Sem ERP / mini case */
.no-erp { padding-top: 48px; padding-bottom: 48px; }
.no-erp-card {
  max-width: 640px;
  margin: 32px auto 0;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 24px;
}
.no-erp-icon { font-size: 1.6rem; display: block; margin-bottom: 14px; }
.no-erp-card p { font-size: 0.96rem; }
.no-erp-result {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--card-border);
  font-size: 0.9rem !important;
  color: var(--accent-3) !important;
  font-weight: 500;
}

/* Proof */
.proof { background: var(--bg-elevated); border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 40px;
}
.stat-card {
  text-align: center;
  padding: 26px 14px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
}
.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 7vw, 2.6rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { display: block; margin-top: 10px; font-size: 0.86rem; color: var(--text-dim); }

/* Process */
.process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 36px;
}
.process-step {
  padding: 24px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  background: var(--card);
  position: relative;
}
.process-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.process-step p { font-size: 0.93rem; margin: 0; }

/* Case */
.case { background: var(--bg-elevated); border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
.case-card {
  margin-top: 36px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 26px 22px;
}
.case-block { margin-bottom: 24px; }
.case-block:last-of-type { margin-bottom: 0; }
.case-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
  margin-bottom: 8px;
}
.case-block p { margin: 0; font-size: 0.98rem; }
.case-stats {
  display: flex;
  gap: 28px;
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid var(--card-border);
  flex-wrap: wrap;
}
.case-stats div { display: flex; flex-direction: column; gap: 4px; }
.case-stats strong { font-family: var(--font-heading); font-weight: 800; font-size: 1.4rem; color: var(--text); }
.case-stats span { font-size: 0.8rem; color: var(--text-dimmer); }

/* Stack */
.stack { text-align: center; }
.stack-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
}
.stack-badges span {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  background: var(--card);
}

/* Contact */
.contact-card {
  text-align: center;
  padding: 44px 24px;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(34,211,238,0.10), rgba(139,92,246,0.08));
  border: 1px solid rgba(139,92,246,0.25);
}
.contact-card h2 { margin-bottom: 12px; }
.contact-card p { max-width: 46ch; margin: 0 auto 28px; font-size: 1.02rem; }
.contact-actions { display: flex; flex-direction: column; justify-content: center; gap: 14px; }

/* Footer */
.site-footer { border-top: 1px solid var(--card-border); padding: 26px 0; }
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-dimmer);
  font-family: var(--font-mono);
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Hero entrance: pure CSS, never depends on JS/IntersectionObserver timing,
   since it's above the fold and must never render invisible. */
@keyframes hero-enter-kf {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-enter { animation: hero-enter-kf 0.7s ease both; }
.hero-enter-delay { animation-delay: 0.12s; }
@media (prefers-reduced-motion: reduce) {
  .hero-enter { animation: none; }
}

/* ============ Small tablet and up (≥560px) ============ */
@media (min-width: 560px) {
  .problem-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: row; flex-wrap: wrap; }
  .btn { width: auto; }
  .contact-actions { flex-direction: row; }
}

/* ============ Tablet and up (≥720px) ============ */
@media (min-width: 720px) {
  .nav-desktop { display: flex; gap: 30px; }
  .nav-desktop a { color: var(--text-dim); font-size: 0.94rem; font-weight: 500; transition: color 0.15s ease; }
  .nav-desktop a:hover { color: var(--text); }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }

  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .case-card { padding: 36px; }
  .contact-card { padding: 56px 40px; }
}

/* ============ Desktop (≥980px) ============ */
@media (min-width: 980px) {
  .hero {
    flex-direction: row;
    align-items: center;
    gap: 56px;
    padding-top: 76px;
    padding-bottom: 72px;
  }
  .hero-copy { flex: 1.1; }
  .hero-visual { flex: 0.9; }
  .chat-mock { transform: perspective(1200px) rotateY(-4deg) rotateX(2deg); }

  section { padding: 88px 0; }

  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .problem-grid { grid-template-columns: repeat(4, 1fr); }
  .process-grid { grid-template-columns: repeat(4, 1fr); }

  .footer-inner { flex-direction: row; justify-content: space-between; }
}