/* ===================================================
   Robot Overlord LLC — Site Stylesheet
   Dark theme, premium consultancy aesthetic
   =================================================== */

:root {
  --bg:         #0a0a0c;
  --bg-subtle:  #111116;
  --bg-card:    #15151c;
  --border:     #1f1f2e;
  --accent:     #6c63ff;
  --accent-dim: #4c45b5;
  --accent-glow: rgba(108, 99, 255, 0.18);
  --text:       #e8e8f0;
  --text-muted: #7a7a96;
  --text-dim:   #50506a;
  --white:      #ffffff;
  --red:        #ff4060;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius:  12px;
  --radius-sm: 6px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ─── Typography ─────────────────────────────────── */
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
h1 { font-size: clamp(2.6rem, 7vw, 5.2rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: 1.15rem; font-weight: 600; }

.label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

/* ─── Layout ─────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 7rem 0; }

/* ─── Navigation ─────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: background var(--transition), backdrop-filter var(--transition);
}
nav.scrolled {
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.nav-logo {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-logo .dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px var(--accent);
}
.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--white); }
.nav-cta {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  transition: background var(--transition), color var(--transition);
}
.nav-cta:hover {
  background: var(--accent);
  color: var(--white);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ─── Hero ───────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.hero-eyebrow .pulse {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 8px var(--accent);
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}
.hero-title { color: var(--white); margin-bottom: 1.5rem; }
.hero-title .accent { color: var(--accent); }
.hero-tagline {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--text-muted);
  max-width: 580px;
  margin-bottom: 2.75rem;
  line-height: 1.65;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--accent);
  color: var(--white);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 30px rgba(108, 99, 255, 0.35);
}
.btn-primary:hover {
  background: #7c74ff;
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(108, 99, 255, 0.5);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}
.btn-secondary:hover { color: var(--white); }
.btn-secondary svg { transition: transform var(--transition); }
.btn-secondary:hover svg { transform: translateX(4px); }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stat-item {}
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ─── Section Header ─────────────────────────────── */
.section-header { margin-bottom: 3.5rem; }
.section-title { color: var(--white); margin-bottom: 1rem; }
.section-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.65;
}

/* ─── Services ───────────────────────────────────── */
#services { background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  cursor: default;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.service-card:hover {
  border-color: rgba(108, 99, 255, 0.4);
  transform: translateY(-3px);
}
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 44px; height: 44px;
  background: var(--accent-glow);
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.2rem;
}
.service-card h3 {
  color: var(--white);
  margin-bottom: 0.6rem;
}
.service-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.service-tag {
  display: inline-block;
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
}

/* ─── Why Us ─────────────────────────────────────── */
#why {
  position: relative;
}
.why-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.why-left {}
.why-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.why-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.why-check {
  width: 24px; height: 24px;
  min-width: 24px;
  background: var(--accent-glow);
  border: 1px solid rgba(108, 99, 255, 0.4);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}
.why-check svg { width: 13px; height: 13px; }
.why-item-text h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.3rem;
}
.why-item-text p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.why-right {}
.differentiator-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1rem;
}
.differentiator-card:last-child { margin-bottom: 0; }
.diff-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}
.diff-header h3 { color: var(--white); font-size: 1rem; }
.diff-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  white-space: nowrap;
}
.diff-badge.us { background: rgba(108, 99, 255, 0.2); color: var(--accent); border: 1px solid rgba(108, 99, 255, 0.3); }
.diff-badge.them { background: rgba(255, 64, 96, 0.1); color: var(--red); border: 1px solid rgba(255, 64, 96, 0.2); }
.diff-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; }

/* ─── CTA / Contact ──────────────────────────────── */
#contact {
  position: relative;
  overflow: hidden;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
}
.contact-glow {
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.contact-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 660px;
  margin: 0 auto;
}
.contact-inner h2 { color: var(--white); margin-bottom: 1rem; }
.contact-inner p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.65;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: left;
  margin-bottom: 2rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-group select option { background: var(--bg-card); }
.form-submit {
  padding: 0.9rem 2rem;
  background: var(--accent);
  color: var(--white);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 30px rgba(108, 99, 255, 0.3);
  width: 100%;
}
.form-submit:hover {
  background: #7c74ff;
  transform: translateY(-1px);
  box-shadow: 0 0 40px rgba(108, 99, 255, 0.45);
}
.contact-alt {
  font-size: 0.875rem;
  color: var(--text-dim);
}
.contact-alt a {
  color: var(--accent);
  transition: color var(--transition);
}
.contact-alt a:hover { color: #7c74ff; }

/* ─── Footer ─────────────────────────────────────── */
footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.footer-brand {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.footer-brand span { color: var(--accent); }
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ─── Scroll fade-in animations ─────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ─── Mobile Nav Overlay ─────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 12, 0.97);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.5rem;
  transition: color var(--transition);
}
.mobile-close:hover { color: var(--white); }

/* ─── Responsive ─────────────────────────────────── */
@media (max-width: 768px) {
  section { padding: 5rem 0; }

  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }

  .services-grid { grid-template-columns: 1fr; }

  .why-layout { grid-template-columns: 1fr; gap: 3rem; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}