/* ============================================================
   BitHub Ghana Limited — Main Stylesheet
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --color-bg: #060b18;
  --color-bg2: #0d1526;
  --color-surface: #111827;
  --color-surface2: #1a2440;
  --color-border: rgba(255,255,255,0.08);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-accent: #6366f1;
  --color-accent2: #8b5cf6;
  --color-cyan: #06b6d4;
  --color-green: #10b981;
  --color-amber: #f59e0b;
  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-secondary: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-text: linear-gradient(90deg, #6366f1, #06b6d4, #8b5cf6);
  --font-body: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
  --font-head: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.25);
  --transition: 0.3s ease;
  --nav-height: 72px;
  --max-width: 1280px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; font-synthesis: none; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}
select option { background: var(--color-surface); }
textarea { resize: vertical; }

/* ---------- Utility ---------- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; }
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header { text-align: center; margin-bottom: 4rem; }
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.3);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.section-desc { color: var(--color-text-muted); max-width: 540px; margin: 0 auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.6); }
.btn-outline {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  background: rgba(255,255,255,0.04);
}
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); background: rgba(99,102,241,0.08); }
.btn-full { width: 100%; justify-content: center; }

/* ---------- NAVBAR ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(6,11,24,0.85);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border);
}
.nav-container {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 0.6rem; }
.logo-img { width: 36px; height: 36px; }
.logo-text { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; color: #fff; }
.logo-text .accent { color: var(--color-accent); }
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(255,255,255,0.06); }
.nav-cta { font-weight: 600; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--transition); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
#particleCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content { position: relative; z-index: 1; max-width: 860px; }
.hero-badge {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  background: rgba(255,255,255,0.04);
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 620px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 4rem; }
.hero-stats { display: flex; align-items: center; justify-content: center; gap: 0; }
.stat { padding: 0 2.5rem; text-align: center; }
.stat-num {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat span { font-size: 1.8rem; font-weight: 700; color: var(--color-accent); }
.stat p { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 0.25rem; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-divider { width: 1px; height: 48px; background: var(--color-border); }
.hero-scroll { position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%); z-index: 1; }
.scroll-indicator {
  width: 24px; height: 40px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  position: relative;
}
.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollBounce 2s infinite;
}
@keyframes scrollBounce { 0%,100% { top: 6px; opacity: 1; } 50% { top: 16px; opacity: 0.4; } }

/* ---------- ABOUT ---------- */
.about { background: var(--color-bg2); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.about-text .lead { font-size: 1.15rem; font-weight: 500; margin-bottom: 1rem; }
.about-text p { color: var(--color-text-muted); margin-bottom: 2rem; }
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}
.about-card:hover { border-color: var(--color-accent); transform: translateY(-4px); }
.about-card-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.about-card h3 { font-family: var(--font-head); font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.about-card p { color: var(--color-text-muted); font-size: 0.88rem; margin: 0; }
.reasons-title { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; margin-bottom: 1.5rem; }
.reasons-list { display: flex; flex-direction: column; gap: 1.25rem; }
.reasons-list li { display: flex; gap: 1rem; align-items: flex-start; }
.check {
  flex-shrink: 0;
  width: 28px; height: 28px;
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.3);
  color: var(--color-green);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
  margin-top: 0.1rem;
}
.reasons-list strong { display: block; font-weight: 600; margin-bottom: 0.25rem; }
.reasons-list p { color: var(--color-text-muted); font-size: 0.88rem; margin: 0; }

/* ---------- SERVICES ---------- */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column;
}
.service-card:hover { border-color: var(--color-accent); transform: translateY(-6px); box-shadow: var(--shadow-glow); }
.service-card.featured {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, rgba(99,102,241,0.08) 0%, var(--color-surface) 100%);
  box-shadow: var(--shadow-glow);
}
.featured-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #fff; font-size: 0.72rem; font-weight: 700;
  padding: 0.3rem 1rem; border-radius: 999px;
  white-space: nowrap;
}
.service-icon-wrap { margin-bottom: 1.25rem; }
.service-svg { width: 52px; height: 52px; }
.service-card h3 { font-family: var(--font-head); font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; }
.service-card p { color: var(--color-text-muted); font-size: 0.9rem; flex: 1; margin-bottom: 1.25rem; }
.service-features { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.5rem; }
.service-features li { font-size: 0.82rem; color: var(--color-text-muted); padding-left: 1.1rem; position: relative; }
.service-features li::before { content: '•'; position: absolute; left: 0; color: var(--color-accent); }
.service-link { font-size: 0.88rem; font-weight: 600; color: var(--color-accent); transition: color var(--transition); }
.service-link:hover { color: var(--color-accent2); }

/* ---------- TEAM ---------- */
.team { background: var(--color-bg2); }
.team-carousel-wrap { position: relative; display: flex; align-items: center; gap: 1rem; }
.team-track-container { overflow: hidden; flex: 1; }
.team-track { display: flex; gap: 1.5rem; transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.team-card {
  flex: 0 0 calc((100% - 4 * 1.5rem) / 5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
  min-width: 200px;
}
.team-card:hover { border-color: var(--color-accent); transform: translateY(-4px); }
.team-avatar { position: relative; margin-bottom: 1rem; display: inline-block; }
.avatar-placeholder {
  width: 80px; height: 80px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto;
}
.team-social {
  position: absolute; bottom: -8px; right: -8px;
  display: flex; gap: 4px;
  opacity: 0; transition: opacity var(--transition);
}
.team-card:hover .team-social { opacity: 1; }
.team-social a {
  width: 26px; height: 26px;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; font-weight: 700;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.team-social a:hover { background: var(--color-accent); color: #fff; }
.team-info h3 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
.team-role {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}
.team-info p { font-size: 0.82rem; color: var(--color-text-muted); }

/* ---------- CAROUSEL CONTROLS ---------- */
.carousel-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  z-index: 2;
}
.carousel-btn:hover { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.carousel-btn:disabled { opacity: 0.3; pointer-events: none; }
.team-dots, .news-dots { display: flex; justify-content: center; gap: 8px; margin-top: 2rem; }
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: background var(--transition), width var(--transition);
  border: none;
}
.dot.active { background: var(--color-accent); width: 24px; border-radius: 4px; }

/* ---------- PROJECTS ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.project-card:hover { border-color: var(--color-accent); transform: translateY(-6px); box-shadow: var(--shadow-glow); }
.project-img {
  height: 160px;
  display: flex; align-items: flex-end; padding: 1rem;
  position: relative;
}
.project-type {
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.project-body { padding: 1.5rem; }
.project-body h3 { font-family: var(--font-head); font-size: 1.05rem; font-weight: 700; margin-bottom: 0.6rem; }
.project-body p { color: var(--color-text-muted); font-size: 0.88rem; margin-bottom: 1rem; }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.project-tags span {
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
}
.project-link { font-size: 0.88rem; font-weight: 600; color: var(--color-accent); transition: color var(--transition); }
.project-link:hover { color: var(--color-cyan); }

/* ---------- NEWS ---------- */
.news { background: var(--color-bg2); }
.news-carousel-wrap { position: relative; display: flex; align-items: center; gap: 1rem; }
.news-track-container { overflow: hidden; flex: 1; }
.news-track { display: flex; gap: 1.5rem; transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.news-card {
  flex: 0 0 calc((100% - 2 * 1.5rem) / 3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  min-width: 260px;
}
.news-card:hover { border-color: var(--color-cyan); transform: translateY(-4px); }
.news-thumb { position: relative; height: 180px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.play-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.news-card:hover .play-overlay { background: rgba(99,102,241,0.4); }
.play-icon {
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  position: relative;
}
.play-icon::after {
  content: '';
  position: absolute;
  top: 50%; left: 53%;
  transform: translate(-50%, -50%);
  border: solid transparent;
  border-width: 9px 0 9px 16px;
  border-left-color: #6366f1;
}
.news-body { padding: 1.25rem; }
.news-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-cyan);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}
.news-body h4 { font-family: var(--font-head); font-size: 0.95rem; font-weight: 700; margin-bottom: 0.5rem; line-height: 1.4; }
.news-body p { font-size: 0.82rem; color: var(--color-text-muted); margin-bottom: 0.75rem; }
.news-link { font-size: 0.82rem; font-weight: 600; color: var(--color-cyan); transition: color var(--transition); }
.news-link:hover { color: var(--color-accent); }

/* ---------- CONTACT ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 4rem; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-icon { font-size: 1.4rem; margin-top: 0.1rem; }
.contact-item h4 { font-family: var(--font-head); font-size: 0.9rem; font-weight: 700; margin-bottom: 0.25rem; }
.contact-item p { font-size: 0.88rem; color: var(--color-text-muted); }
.contact-item a { color: var(--color-text-muted); transition: color var(--transition); }
.contact-item a:hover { color: var(--color-accent); }
.social-links { display: flex; gap: 0.75rem; margin-top: 0.5rem; }
.social-btn {
  width: 42px; height: 42px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.social-btn svg { width: 18px; height: 18px; color: var(--color-text-muted); transition: color var(--transition); }
.social-btn:hover { background: var(--color-accent); border-color: var(--color-accent); }
.social-btn:hover svg { color: #fff; }
.contact-form { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.contact-form .form-group { margin-bottom: 1rem; }
.contact-form .form-row .form-group { margin-bottom: 0; }
label { font-size: 0.82rem; font-weight: 600; color: var(--color-text-muted); }
.form-notice { margin-top: 0.75rem; font-size: 0.85rem; text-align: center; min-height: 1.2em; }
.form-notice.success { color: var(--color-green); }
.form-notice.error { color: #ef4444; }

/* ---------- FOOTER ---------- */
.footer { background: #030710; border-top: 1px solid var(--color-border); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand p { color: var(--color-text-muted); font-size: 0.88rem; margin-top: 1rem; max-width: 240px; }
.footer-col h5 { font-family: var(--font-head); font-size: 0.88rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-muted); margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a { font-size: 0.88rem; color: var(--color-text-muted); transition: color var(--transition); }
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: 2rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.footer-bottom p { font-size: 0.82rem; color: var(--color-text-muted); }
.footer-bottom a { color: var(--color-accent); }

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 100px; right: 1.5rem;
  width: 46px; height: 46px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(99,102,241,0.5);
  opacity: 0; pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 900;
}
.back-to-top svg { width: 20px; height: 20px; }
.back-to-top.visible { opacity: 1; pointer-events: all; transform: translateY(0); }
.back-to-top:hover { box-shadow: 0 6px 24px rgba(99,102,241,0.7); transform: translateY(-2px); }

/* ============================================================
   CHAT WIDGET — fully class-driven (no [hidden] on window)
   ============================================================ */
.chat-widget {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  z-index: 950;
}

/* Toggle button */
.chat-toggle {
  width: 56px; height: 56px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(99,102,241,0.5);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.chat-toggle:hover { transform: scale(1.08); box-shadow: 0 8px 28px rgba(99,102,241,0.7); }
.chat-toggle svg { width: 24px; height: 24px; color: #fff; pointer-events: none; }
.chat-badge {
  position: absolute; top: -4px; right: -4px;
  background: var(--color-cyan);
  color: #fff;
  font-size: 0.6rem; font-weight: 800;
  padding: 2px 5px;
  border-radius: 999px;
  border: 2px solid var(--color-bg);
  line-height: 1;
  pointer-events: none;
}

/* Icon state — JS adds/removes .chat-open on .chat-widget */
.chat-icon-open  { display: block; }
.chat-icon-close { display: none;  }
.chat-widget.chat-open .chat-icon-open  { display: none;  }
.chat-widget.chat-open .chat-icon-close { display: block; }

/* Window — hidden by default, shown when .chat-open */
.chat-window {
  display: none;
  flex-direction: column;
  position: absolute;
  bottom: 68px; right: 0;
  width: min(360px, 90vw);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: chatSlideUp 0.25s ease;
}
.chat-widget.chat-open .chat-window { display: flex; }
@keyframes chatSlideUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Chat internals */
.chat-header {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.9rem 1.25rem;
  background: var(--color-bg2);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.chat-avatar { font-size: 1.6rem; }
.chat-header h4 { font-family: var(--font-head); font-size: 0.95rem; font-weight: 700; }
.chat-status { font-size: 0.72rem; color: var(--color-green); }
.chat-close-btn {
  margin-left: auto;
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; line-height: 1;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.chat-close-btn:hover { background: rgba(255,255,255,0.1); color: var(--color-text); }

.chat-messages {
  flex: 1;
  min-height: 200px;
  max-height: 300px;
  overflow-y: auto;
  padding: 1rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  scrollbar-width: thin; scrollbar-color: var(--color-border) transparent;
}
.chat-msg { display: flex; flex-direction: column; max-width: 85%; }
.chat-msg.bot { align-items: flex-start; }
.chat-msg.user { align-items: flex-end; align-self: flex-end; }
.msg-bubble {
  padding: 0.65rem 1rem;
  border-radius: 16px;
  font-size: 0.88rem;
  line-height: 1.5;
}
.chat-msg.bot .msg-bubble  { background: var(--color-surface2); border-bottom-left-radius: 4px; }
.chat-msg.user .msg-bubble { background: var(--gradient-primary); color: #fff; border-bottom-right-radius: 4px; }
.msg-time { font-size: 0.7rem; color: var(--color-text-muted); margin-top: 0.25rem; padding: 0 0.25rem; }

.chat-suggestions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.25rem; }
.suggestion-btn {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 0.78rem; font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  transition: all var(--transition);
}
.suggestion-btn:hover { background: var(--color-accent); color: #fff; }

.typing-indicator .msg-bubble { display: flex; gap: 4px; align-items: center; padding: 0.75rem 1rem; }
.typing-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-text-muted);
  animation: typingBounce 1.2s infinite ease-in-out;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce { 0%,60%,100% { transform: translateY(0); } 30% { transform: translateY(-6px); } }

.chat-input-area {
  display: flex; gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}
.chat-input-area input {
  flex: 1; border-radius: 999px;
  padding: 0.55rem 1rem; font-size: 0.88rem;
  background: var(--color-bg2); margin: 0;
}
.chat-send {
  width: 36px; height: 36px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition), box-shadow var(--transition);
}
.chat-send svg { width: 16px; height: 16px; color: #fff; }
.chat-send:hover { transform: scale(1.1); box-shadow: 0 4px 14px rgba(99,102,241,0.5); }

/* ---------- SCROLL ANIMATIONS ---------- */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1280px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .team-card { flex: 0 0 calc((100% - 3 * 1.5rem) / 4); }
}
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .team-card { flex: 0 0 calc((100% - 2 * 1.5rem) / 3); }
  .news-card { flex: 0 0 calc((100% - 1 * 1.5rem) / 2); }
}
@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  .section { padding: 4rem 0; }
  .section-title { font-size: clamp(1.7rem, 5vw, 2.2rem); }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; flex-direction: column; align-items: stretch;
    position: absolute; top: var(--nav-height); left: 0; right: 0;
    background: rgba(6,11,24,0.97);
    backdrop-filter: blur(16px);
    padding: 1rem 1.5rem 2rem;
    border-bottom: 1px solid var(--color-border);
    gap: 0.25rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { border-radius: var(--radius); padding: 0.75rem 1rem; }
  .nav-cta { text-align: center; border-radius: var(--radius) !important; }
  .hero-stats { gap: 0; }
  .stat { padding: 0 1.25rem; }
  .stat-num { font-size: 1.8rem; }
  .about-cards { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .team-card { flex: 0 0 calc((100% - 1 * 1.5rem) / 2); }
  .news-card { flex: 0 0 100%; }
}

/* Mobile chat — full-width panel above the button */
@media (max-width: 640px) {
  .back-to-top { bottom: 88px; right: 1rem; }
  .chat-widget { bottom: 1rem; right: 1rem; }
  .chat-window {
    position: fixed;
    bottom: 80px;
    right: 0.75rem;
    left: 0.75rem;
    width: auto;
    max-height: calc(100dvh - 100px);
    border-radius: var(--radius-lg);
  }
  .chat-messages { max-height: calc(100dvh - 300px); min-height: 160px; }
  .chat-close-btn { width: 40px; height: 40px; font-size: 1.15rem; }
}

@media (max-width: 480px) {
  .hero-title { font-size: clamp(2rem, 8vw, 2.8rem); }
  .hero-stats { flex-direction: column; gap: 1.5rem; }
  .stat-divider { width: 40px; height: 1px; }
  .team-card { flex: 0 0 100%; }
}

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