/* ============================================================
   HUMANIBOT — FUTURISTIC ROBOTICS WEBSITE
   ============================================================ */

/* ---- RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep:      #0a0e14;
  --bg-card:      #111722;
  --bg-card-alt:  #141c2a;
  --border:       rgba(125,211,252,.12);
  --border-hover: rgba(125,211,252,.35);
  --text-primary: #e2e8f0;
  --text-muted:   #7a8a9e;
  --accent:       #7dd3fc;
  --accent-glow:  rgba(125,211,252,.25);
  --accent2:      #38bdf8;
  --accent3:      #0ea5e9;
  --font-display: 'Orbitron', sans-serif;
  --font-body:    'Rajdhani', sans-serif;
  --font-mono:    'Share Tech Mono', monospace;
  --transition:   .35s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  font-size: 17px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---- PARTICLE CANVAS ---- */
#particleCanvas {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
  width: 100%; height: 100%;
}

/* ---- UTILITY ---- */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.highlight { color: var(--accent); }
.section { padding: 110px 0; position: relative; z-index: 1; }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0;
  transition: background var(--transition), backdrop-filter var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(10,14,20,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon svg { display: block; }
.logo-text { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; letter-spacing: .04em; }
.logo-accent { color: var(--accent); }

.nav-links { display: flex; list-style: none; gap: 8px; }
.nav-link {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 6px;
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.nav-link::after {
  content:''; position:absolute; bottom:4px; left:50%; transform:translateX(-50%);
  width:0; height:2px; background:var(--accent); border-radius:2px;
  transition: width var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--accent); }
.nav-link:hover::after, .nav-link.active::after { width:60%; }

/* Mobile toggle */
.nav-toggle { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px; }
.nav-toggle span { display:block; width:26px; height:2px; background:var(--accent); border-radius:2px; transition: var(--transition); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 1;
  overflow: hidden;
  padding: 100px 24px 60px;
}
/* subtle perspective grid */
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(125,211,252,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,211,252,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 20%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  max-width: 1180px; width: 100%;
  display: flex; flex-direction: column; align-items: flex-start;
  position: relative; z-index: 2;
  gap: 24px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(125,211,252,.08); border: 1px solid var(--border);
  padding: 6px 16px; border-radius: 40px;
  font-family: var(--font-mono); font-size: .8rem; color: var(--accent);
  animation: fadeSlideUp .8s ease both;
}
.badge-dot { width:8px; height:8px; border-radius:50%; background:var(--accent); box-shadow: 0 0 8px var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  animation: fadeSlideUp .9s .15s ease both;
}
.hero-title-line { display:block; }
.hero-highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tagline {
  max-width: 580px;
  color: var(--text-muted);
  font-size: 1.15rem; font-weight: 500;
  animation: fadeSlideUp 1s .3s ease both;
}
.hero-buttons {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeSlideUp 1s .45s ease both;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  padding: 14px 34px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 700; font-size: 1rem;
  letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; border: none;
  transition: transform var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, #0c4a6e, #0369a1);
  color: #fff;
}
.btn-inner { position: relative; z-index: 1; }
.btn-glow {
  position: absolute; inset: -2px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent));
  background-size: 200% 200%; animation: shimmer 3s ease infinite;
  opacity: 0; transition: opacity .4s;
  z-index: 0;
}
.btn-primary:hover .btn-glow { opacity: .35; }
@keyframes shimmer { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-hover);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn-secondary:hover { background: var(--accent-glow); border-color: var(--accent); }

/* ---- Hero Robot Visual ---- */
.hero-robot-visual {
  position: absolute; right: 6%; top: 50%; transform: translateY(-50%);
  width: 380px; height: 380px;
  animation: fadeSlideUp .8s .6s ease both;
}
.robot-core {
  position: absolute; inset: 25%;
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
}
.robot-eye-svg { width: 100%; height: 100%; }
.robot-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid var(--border);
}
.ring-1 { inset: 15%; animation: spin 20s linear infinite; border-color: rgba(125,211,252,.25); }
.ring-2 { inset: 8%; animation: spin 30s linear infinite reverse; border-color: rgba(125,211,252,.15); }
.ring-3 { inset: 0;   animation: spin 40s linear infinite; border-color: rgba(125,211,252,.08); }
@keyframes spin { to { transform: rotate(360deg); } }

.robot-orbit-dot {
  position: absolute; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent-glow);
}
.dot-1 { top: 12%; left: 50%; transform: translateX(-50%); animation: orbitPulse 2s ease infinite; }
.dot-2 { bottom: 22%; right: 10%; animation: orbitPulse 2.4s .8s ease infinite; }
.dot-3 { bottom: 18%; left: 12%; animation: orbitPulse 2.8s .4s ease infinite; }
@keyframes orbitPulse { 0%,100%{transform:translateX(-50%) scale(1);opacity:1} 50%{transform:translateX(-50%) scale(1.3);opacity:.6} }

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: fadeSlideUp 1s .9s ease both;
  z-index: 2;
}
.scroll-line { width: 1px; height: 36px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scrollPulse 2s ease infinite; }
.scroll-text { font-family: var(--font-mono); font-size: .7rem; color: var(--text-muted); letter-spacing: .2em; text-transform: uppercase; }
@keyframes scrollPulse { 0%,100%{opacity:1;transform:scaleY(1)} 50%{opacity:.4;transform:scaleY(.7)} }

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag { font-family: var(--font-mono); font-size: .8rem; color: var(--accent); letter-spacing: .15em; display: block; margin-bottom: 12px; }
.section-title { font-family: var(--font-display); font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 700; margin-bottom: 16px; line-height: 1.2; }
.section-sub { color: var(--text-muted); max-width: 580px; margin: 0 auto; font-size: 1.05rem; }

/* ============================================================
   FEATURES
   ============================================================ */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 30px 36px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  opacity: 0; transform: translateY(40px);
  animation-fill-mode: both;
}
.feature-card.visible { animation: cardReveal .7s ease forwards; }
@keyframes cardReveal { to { opacity:1; transform:translateY(0); } }
.feature-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.feature-card:hover .card-glow { opacity: 1; }

.card-glow {
  position: absolute; top: -60px; left: 50%; transform: translateX(-50%);
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  opacity: 0; transition: opacity .6s; pointer-events: none;
}
.card-number { position: absolute; top: 20px; right: 24px; font-family: var(--font-mono); font-size: .75rem; color: rgba(125,211,252,.25); }
.card-icon { width: 64px; height: 64px; margin-bottom: 24px; }
.card-icon svg { width: 100%; height: 100%; }
.card-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; margin-bottom: 14px; }
.card-desc { color: var(--text-muted); font-size: .96rem; line-height: 1.7; margin-bottom: 24px; }
.card-link { font-family: var(--font-body); font-weight: 600; color: var(--accent); font-size: .92rem; letter-spacing: .04em; }
.link-arrow { display: inline-block; transition: transform var(--transition); }
.card-link:hover .link-arrow { transform: translateX(6px); }

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: linear-gradient(180deg, var(--bg-deep), #0d1219 50%, var(--bg-deep)); }
.about-bg-accent {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(14,165,233,.06), transparent 70%);
  pointer-events: none;
}
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: center; }
.about-frame { position: relative; padding: 40px; }
.about-circuit {
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10 10 L40 10 L40 40 L70 40 L70 70 L90 70' stroke='%237dd3fc' stroke-width='0.5' fill='none' opacity='0.08'/%3E%3Ccircle cx='40' cy='10' r='2' fill='%237dd3fc' opacity='0.15'/%3E%3Ccircle cx='40' cy='40' r='2' fill='%237dd3fc' opacity='0.15'/%3E%3Ccircle cx='70' cy='40' r='2' fill='%237dd3fc' opacity='0.15'/%3E%3Ccircle cx='70' cy='70' r='2' fill='%237dd3fc' opacity='0.15'/%3E%3C/svg%3E") repeat;
  pointer-events: none; opacity: .7;
}
.about-stat-block { display: flex; flex-direction: column; gap: 28px; position: relative; z-index: 1; }
.stat {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px;
  padding: 24px 28px;
  display: flex; align-items: center; gap: 18px;
  transition: border-color var(--transition);
}
.stat:hover { border-color: var(--border-hover); }
.stat-num {
  font-family: var(--font-display); font-size: 1.9rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-label { color: var(--text-muted); font-size: .92rem; font-weight: 500; }

.about-content { position: relative; z-index: 1; }
.about-content .section-tag { text-align: left; }
.about-content .section-title { text-align: left; }
.about-text { color: var(--text-muted); font-size: 1rem; margin-bottom: 18px; line-height: 1.8; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 32px; }
.tag {
  background: rgba(125,211,252,.07); border: 1px solid var(--border);
  color: var(--accent); font-family: var(--font-mono); font-size: .75rem;
  padding: 6px 14px; border-radius: 20px; letter-spacing: .06em;
  transition: background var(--transition), border-color var(--transition);
}
.tag:hover { background: var(--accent-glow); border-color: var(--border-hover); }

/* ============================================================
   GALLERY
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 220px 220px;
  gap: 18px;
}
.gallery-item { position: relative; border-radius: 14px; overflow: hidden; cursor: pointer; }
.gallery-item.gallery-large { grid-row: span 2; }
.gallery-img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform .6s ease;
}
.gallery-item:hover .gallery-img { transform: scale(1.08); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,14,20,.85) 0%, transparent 50%);
  display: flex; align-items: flex-end; padding: 24px;
  opacity: 0; transition: opacity .4s;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-label { font-family: var(--font-display); font-size: .82rem; font-weight: 600; letter-spacing: .08em; color: var(--accent); }
/* placeholder gradient if image fails */
.gallery-item:nth-child(1) .gallery-img { background-color: #1a2535; }
.gallery-item:nth-child(2) .gallery-img { background-color: #162030; }
.gallery-item:nth-child(3) .gallery-img { background-color: #1c2838; }
.gallery-item:nth-child(4) .gallery-img { background-color: #151f2c; }
.gallery-item:nth-child(5) .gallery-img { background-color: #182535; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-bg-lines {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
  background: repeating-linear-gradient(90deg, transparent, transparent 119px, rgba(125,211,252,.03) 119px, rgba(125,211,252,.03) 120px);
}
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px;
  padding: 28px 26px;
  transition: border-color var(--transition);
}
.contact-card:hover { border-color: var(--border-hover); }
.contact-icon { width: 44px; height: 44px; margin-bottom: 16px; }
.contact-icon svg { width: 100%; height: 100%; }
.contact-card h4 { font-family: var(--font-display); font-size: .82rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; color: var(--text-primary); }
.contact-detail { color: var(--text-muted); font-size: .95rem; transition: color var(--transition); display: block; }
a.contact-detail:hover { color: var(--accent); }

/* ---- Contact Form ---- */
.contact-form-wrap {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 18px;
  padding: 44px 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 24px; position: relative; }
.form-group label {
  display: block;
  font-family: var(--font-mono); font-size: .75rem; color: var(--text-muted);
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px;
}
.form-group input, .form-group textarea {
  width: 100%; background: var(--bg-deep);
  border: none; border-bottom: 1px solid var(--border);
  color: var(--text-primary); font-family: var(--font-body); font-size: 1rem;
  padding: 12px 4px;
  outline: none; transition: border-color var(--transition);
  border-radius: 0;
}
.form-group textarea { resize: vertical; }
.form-group input:focus, .form-group textarea:focus { border-bottom-color: var(--accent); }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(122,138,158,.5); }
.input-line {
  position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .4s;
}
.form-group:focus-within .input-line { width: 100%; }

.form-btn { width: 100%; margin-top: 8px; }
.form-success {
  display: flex; align-items: center; gap: 12px;
  margin-top: 20px; padding: 14px 18px;
  background: rgba(125,211,252,.08); border: 1px solid rgba(125,211,252,.25);
  border-radius: 10px;
  color: var(--accent); font-family: var(--font-body); font-weight: 600;
  opacity: 0; transform: translateY(10px);
  transition: opacity .4s, transform .4s;
  pointer-events: none;
}
.form-success.show { opacity: 1; transform: translateY(0); }
.form-success svg { width: 22px; height: 22px; flex-shrink: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { padding: 72px 0 36px; position: relative; z-index: 1; }
.footer-top-line { height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); margin-bottom: 56px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; }
.footer-logo { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; display: block; margin-bottom: 14px; }
.footer-brand p { color: var(--text-muted); font-size: .94rem; max-width: 280px; line-height: 1.7; }
.footer-col h5 { font-family: var(--font-display); font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-muted); font-size: .94rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }

.social-links { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.social-link {
  width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition), transform var(--transition), background var(--transition);
}
.social-link svg { width: 18px; height: 18px; }
.social-link:hover { border-color: var(--border-hover); color: var(--accent); background: var(--accent-glow); transform: translateY(-2px); }

.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); text-align: center; }
.footer-bottom p { color: var(--text-muted); font-size: .82rem; font-family: var(--font-mono); }

/* ============================================================
   SCROLL-REVEAL (generic)
   ============================================================ */
.reveal {
  opacity: 0; transform: translateY(36px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   ANIMATIONS KEYFRAMES
   ============================================================ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ---- Tablet ---- */
@media (max-width: 960px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { order: -1; }
  .about-stat-block { flex-direction: row; flex-wrap: wrap; }
  .gallery-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .gallery-item.gallery-large { grid-row: span 1; }
  .gallery-item { height: 210px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-robot-visual { width: 260px; height: 260px; right: 2%; }
}

/* ---- Mobile ---- */
@media (max-width: 680px) {
  body { font-size: 16px; }
  .section { padding: 72px 0; }

  /* Nav */
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(10,14,20,.95); backdrop-filter: blur(16px);
    padding: 16px 0;
    max-height: 0; overflow: hidden;
    transition: max-height .4s ease, padding .4s;
  }
  .nav-links.open { max-height: 300px; padding: 16px 0; }
  .nav-links li { padding: 0 24px; }
  .nav-link { display: block; padding: 12px 0; border-radius: 0; }
  .nav-link::after { left: 0; transform: none; }
  .nav-link:hover::after, .nav-link.active::after { width: 40px; }

  /* Hero */
  .hero { padding: 100px 24px 100px; align-items: flex-start; }
  .hero-content { align-items: center; text-align: center; }
  .hero-tagline { text-align: center; }
  .hero-buttons { justify-content: center; }
  .hero-robot-visual { position: relative; right: auto; top: auto; transform: none; width: 200px; height: 200px; margin: 12px auto 0; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; }

  /* About */
  .about-stat-block { flex-direction: column; }

  /* Gallery */
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .gallery-item, .gallery-item.gallery-large { height: 200px; }

  /* Contact */
  .contact-form-wrap { padding: 28px 20px; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}