/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: hsl(220,30%,6%);
  color: hsl(0,0%,95%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── Variables ── */
:root {
  --bg: hsl(220,30%,6%);
  --fg: hsl(0,0%,95%);
  --primary: #3b82f6;
  --primary-fg: hsl(0,0%,100%);
  --secondary: hsl(215,40%,16%);
  --muted: hsl(210,15%,80%);
  --border: hsl(215,25%,18%);
  --card: hsl(215,35%,10%);
}

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background 0.3s, box-shadow 0.3s;
}
.navbar.scrolled {
  background: hsla(220,30%,6%,0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  border-bottom: 1px solid hsla(217,91%,60%,0.3);
}
.navbar-inner {
  max-width: 72rem; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem;
}
.logo { font-size: 1.25rem; font-weight: 700; letter-spacing: 0.05em; }
.logo-accent { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-link { font-size: 0.875rem; font-weight: 700; color: var(--muted); transition: color 0.2s; }
.nav-link:hover { color: var(--fg); }
.nav-cta {
  background: var(--primary); color: var(--primary-fg);
  padding: 0.5rem 1.25rem; border-radius: 0.5rem;
  font-size: 0.875rem; font-weight: 600; transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.9; }
.menu-btn {
  display: none; background: none; border: none; color: var(--fg);
  cursor: pointer; font-size: 1.5rem;
}
.mobile-menu {
  display: none; flex-direction: column; gap: 1rem;
  padding: 0.5rem 1.5rem 1.5rem;
  background: hsla(220,30%,6%,0.95); backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1.125rem; color: var(--fg); transition: color 0.2s; }
.mobile-menu a:hover { color: var(--primary); }

@media (max-width: 767px) {
  .nav-links { display: none; }
  .menu-btn { display: block; }
}

/* ── Hero ── */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 5rem 1.25rem 4rem;
  background: linear-gradient(160deg, hsl(220,30%,6%) 0%, hsl(215,45%,10%) 40%, hsl(200,50%,12%) 70%, hsl(195,55%,14%) 100%);
  overflow: hidden;
}
.hero-glow1, .hero-glow2 {
  position: absolute; border-radius: 50%; pointer-events: none; filter: blur(80px);
}
.hero-glow1 { top: 25%; left: 25%; width: 24rem; height: 24rem; opacity: 0.1; background: radial-gradient(circle, #3b82f6, transparent); }
.hero-glow2 { bottom: 25%; right: 25%; width: 20rem; height: 20rem; opacity: 0.08; background: radial-gradient(circle, #06c8d8, transparent); }
.hero-grid {
  position: relative;
  max-width: 72rem; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.hero-grid-glow {
  position: absolute; top: 50%; left: 60%;
  transform: translate(-33%, -50%);
  width: 32rem; height: 32rem; border-radius: 50%;
  opacity: 0.4; filter: blur(100px); pointer-events: none;
  background: radial-gradient(circle, #06c8d8 0%, #3b82f6 50%, transparent 80%);
}
.hero h1 { font-size: 3.75rem; font-weight: 900; line-height: 1.05; margin-bottom: 1.5rem; }
.hero h1 .accent { color: var(--primary); display: block; }
.hero-text { margin-bottom: 2.5rem; }
.hero-text p { color: var(--muted); font-size: 1.125rem; line-height: 1.7; margin-bottom: 0.75rem; max-width: 36rem; }
.hero-cta {
  display: inline-block; background: var(--primary); color: var(--primary-fg);
  padding: 0.875rem 2rem; border-radius: 0.5rem; font-weight: 600; font-size: 1.125rem;
  transition: opacity 0.2s; margin-bottom: 3rem;
}
.hero-cta:hover { opacity: 0.9; }
.stats { display: flex; }
.stat { padding-right: 1.25rem; }
.stat + .stat { padding-left: 1.25rem; padding-right: 1.25rem; border-left: 1px solid hsla(210,15%,80%,0.2); }
.stat-num { font-size: 2rem; font-weight: 900; color: var(--primary); white-space: nowrap; }
.stat-label { font-size: 0.875rem; color: var(--muted); margin-top: 0.25rem; white-space: nowrap; }
.hero-photo { display: flex; justify-content: flex-end; }
.photo-wrap {
  position: relative; max-width: 28rem;
  border: 1px solid hsla(217,91%,60%,0.4); border-radius: 1rem;
}
.photo-wrap img { position: relative; border-radius: 1rem; width: 100%; max-width: 28rem; object-fit: cover; display: block; }

@media (max-width: 1023px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { justify-content: center; }
  .hero h1 { font-size: 2.75rem; }
}
@media (max-width: 767px) {
  .hero h1 { font-size: 2.25rem; }
  .stats { flex-wrap: wrap; gap: 1rem; }
  .stat { border: none !important; padding: 0 !important; }
}

/* ── Section common ── */
.section { padding: 6rem 1.25rem; }
.section-inner { max-width: 72rem; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header h2 { font-size: 2.75rem; font-weight: 900; margin-bottom: 1rem; }
.section-header p { color: var(--muted); font-size: 1.125rem; max-width: 40rem; margin: 0 auto; }

/* ── Services ── */
.services { background: linear-gradient(180deg, hsl(195,55%,14%) 0%, hsl(215,45%,10%) 100%); }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.service-card {
  background: hsla(215,40%,16%,0.3); backdrop-filter: blur(4px);
  border: 1px solid hsla(217,91%,60%,0.4); border-radius: 1rem; padding: 1.5rem;
  transition: background 0.3s;
}
.service-card:hover { background: hsla(215,40%,16%,0.5); }
.service-icon { color: var(--primary); margin-bottom: 1rem; width: 30px; height: 30px; }
.service-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; }
.service-card p { color: var(--muted); font-size: 0.875rem; line-height: 1.6; }
.services-note { text-align: center; color: var(--muted); margin-top: 3rem; font-size: 1rem; }
.services-note a { color: var(--primary); }
.services-note a:hover { text-decoration: underline; }

@media (max-width: 1023px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px) { .services-grid { grid-template-columns: 1fr; } }

/* ── About ── */
.about { background: linear-gradient(180deg, hsl(215,45%,10%) 0%, hsl(220,40%,8%) 100%); }
.about h2 { font-size: 2.75rem; font-weight: 900; margin-bottom: 3rem; text-align: center; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.about-text p { color: var(--muted); line-height: 1.7; margin-bottom: 1rem; }
.about-text strong { color: var(--fg); font-weight: 600; }
.about-text .guarantee { font-weight: 600; color: var(--fg); }
.certs h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.cert-item { display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 0.75rem; }
.cert-icon { color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.cert-item span { color: var(--muted); }

@media (max-width: 1023px) { .about-grid { grid-template-columns: 1fr; } }

/* ── References ── */
.references { background: linear-gradient(180deg, hsl(220,40%,8%) 0%, hsl(215,45%,10%) 100%); }
.ref-card {
  position: relative;
  background: hsla(215,40%,16%,0.2); backdrop-filter: blur(4px);
  border: 1px solid hsla(215,25%,18%,0.5); border-radius: 1rem;
  padding: 2rem 3rem; height: 320px; overflow-y: auto;
  display: flex; flex-direction: column; justify-content: space-between;
  max-width: 56rem; margin: 0 auto;
}
.ref-quote-icon { color: hsla(195,90%,50%,0.25); margin-bottom: 1rem; }
.ref-text { color: hsla(0,0%,95%,0.9); font-size: 1.125rem; line-height: 1.7; margin-bottom: 2rem; }
.ref-author { font-size: 0.875rem; color: var(--muted); }
.ref-author strong { color: var(--fg); font-weight: 600; }
.ref-author a { color: var(--primary); }
.ref-author a:hover { text-decoration: underline; }
.ref-nav {
  position: absolute; top: 0; bottom: 0; width: 3rem;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; color: var(--muted); cursor: pointer;
  transition: color 0.2s;
}
.ref-nav:hover { color: var(--fg); }
.ref-prev { left: 0; }
.ref-next { right: 0; }
.ref-dots { display: flex; justify-content: center; gap: 0.5rem; margin-top: 2rem; flex-wrap: wrap; }
.ref-dot {
  width: 10px; height: 10px; border-radius: 50%; border: none; cursor: pointer;
  background: hsla(210,15%,80%,0.25); transition: background 0.2s;
}
.ref-dot.active { background: var(--primary); }

/* ── Activities ── */
.activities { background: linear-gradient(180deg, hsl(215,45%,10%) 0%, hsl(220,35%,8%) 100%); }
.activities h2 { font-size: 2rem; font-weight: 900; margin-bottom: 1rem; text-align: center; }
.activities .subtitle { color: var(--muted); margin-bottom: 2rem; text-align: center; }
.activity-item { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; color: var(--muted); }
.activity-item a { color: var(--primary); }
.activity-item a:hover { text-decoration: underline; }

/* ── Contact ── */
.contact { background: linear-gradient(180deg, hsl(220,35%,8%) 0%, hsl(220,30%,6%) 100%); }
.contact-inner { max-width: 48rem; margin: 0 auto; text-align: center; }
.contact h2 { font-size: 2.75rem; font-weight: 900; margin-bottom: 2.5rem; }
.contact-info { margin-bottom: 2.5rem; }
.contact-row { display: flex; align-items: center; justify-content: center; gap: 0.75rem; color: var(--muted); font-size: 1.125rem; margin-bottom: 0.75rem; }
.contact-row svg { color: var(--primary); }
.contact-row a { transition: color 0.2s; }
.contact-row a:hover { color: var(--fg); }
.contact-ico { color: var(--muted); font-size: 1rem; }
.contact-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: var(--primary); color: var(--primary-fg);
  padding: 0.875rem 2rem; border-radius: 0.5rem; font-weight: 600; font-size: 1.125rem;
  transition: opacity 0.2s; border: none; cursor: pointer;
}
.btn-primary:hover { opacity: 0.9; }
.btn-secondary {
  background: var(--secondary); color: var(--fg);
  padding: 0.875rem 2rem; border-radius: 0.5rem; font-weight: 600; font-size: 1.125rem;
  border: 1px solid var(--primary); transition: background 0.2s; cursor: pointer;
}
.btn-secondary:hover { background: hsla(215,40%,16%,0.8); }

/* ── Footer ── */
.footer {
  padding: 2rem 1.25rem; text-align: center; font-size: 0.875rem;
  color: var(--muted); border-top: 1px solid hsla(215,25%,18%,0.3);
  background: hsl(220,30%,5%);
}