/* ============================================
   TECH GUYS AI — style.css
   Dark theme, electric blue accents
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:           #0a0f1e;
  --bg-2:         #0e1529;
  --bg-card:      #111827;
  --bg-card-hover:#141f35;
  --accent:       #00d4ff;
  --accent-dim:   rgba(0, 212, 255, 0.12);
  --accent-glow:  rgba(0, 212, 255, 0.25);
  --accent-2:     #7c3aed;
  --text:         #e2e8f0;
  --text-muted:   #94a3b8;
  --text-faint:   #4a5568;
  --border:       rgba(255,255,255,0.07);
  --border-accent:rgba(0, 212, 255, 0.25);
  --radius:       12px;
  --radius-lg:    20px;
  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --shadow-card:  0 2px 16px rgba(0,0,0,0.3);
  --transition:   0.25s ease;
  --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* ─── UTILITIES ─────────────────────────────── */

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.accent {
  color: var(--accent);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--border-accent);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 16px;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ─── BUTTONS ────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover {
  background: #33ddff;
  box-shadow: 0 0 36px rgba(0, 212, 255, 0.55);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
  background: var(--accent);
  color: #000;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
}
.btn-sm:hover {
  background: #33ddff;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.5);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 1rem;
}

/* ─── NAV ────────────────────────────────────── */

.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav-bar.scrolled {
  background: rgba(10, 15, 30, 0.98);
  box-shadow: 0 2px 24px rgba(0,0,0,0.4);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 32px;
  flex: 1;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
  margin-left: auto;
  padding: 4px 8px;
}

/* ─── HERO ───────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(0, 212, 255, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
}

.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 7px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-accent);
  margin-bottom: 28px;
}

.hero-headline {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* ─── TESTIMONIALS ──────────────────────── */
.testimonials { background: var(--bg); }
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 24px; margin-top: 48px; }
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color 0.2s;
}
.testimonial-card:hover { border-color: var(--border-accent); }
.testimonial-text { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; flex: 1; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-avatar { font-size: 1.8rem; }
.testimonial-author strong { display: block; font-size: 0.9rem; color: var(--text); font-weight: 700; }
.testimonial-author span { font-size: 0.78rem; color: var(--text-faint); }

/* ─── PRODUCTS ──────────────────────────────── */
.products-section { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.products-grid { display: grid; grid-template-columns: 1fr 1.35fr 1fr; gap: 28px; margin-top: 48px; align-items: start; }
@media (max-width: 900px) { .products-grid { grid-template-columns: 1fr; } }
.product-card .card-link { position: absolute; inset: 0; z-index: 0; border-radius: inherit; }
.product-card .card-link ~ * { position: relative; z-index: 1; }
.product-card.featured-center { border-color: var(--border-accent); box-shadow: 0 0 60px rgba(0,212,255,0.12); transform: translateY(-8px); }
.product-card.featured-center:hover { transform: translateY(-12px); }
.product-card {
  position: relative;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s, transform 0.2s;
  aspect-ratio: 1 / 1;
  overflow-y: auto;
}
.product-card:hover { border-color: var(--border-accent); transform: translateY(-4px); }
.product-icon { font-size: 2.4rem; }
.product-badge {
  display: inline-block;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 4px 14px;
  border-radius: 100px;
  width: fit-content;
}
.product-badge-free { background: rgba(124,58,237,0.12); border-color: rgba(124,58,237,0.3); color: #a78bfa; }
.product-card h3 { font-size: 1.3rem; font-weight: 800; color: var(--text); }
.product-card > p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.65; }
.product-features { list-style: none; padding: 0; margin: 4px 0; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-features li { font-size: 0.88rem; color: var(--text-muted); }
.product-learn { font-size: 0.85rem; color: var(--accent); text-decoration: none; }
.product-learn:hover { text-decoration: underline; }

/* ─── SERVICES ───────────────────────────────── */

.services {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  display: block;
  color: inherit;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent-dim) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 212, 255, 0.1);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 20px;
  display: block;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ─── WHY US ─────────────────────────────────── */

.why-us {
  background: var(--bg);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: all var(--transition);
}

.why-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.08);
}

.why-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-dim);
  color: rgba(0, 212, 255, 0.2);
  line-height: 1;
  flex-shrink: 0;
  letter-spacing: -0.03em;
  min-width: 56px;
}

.why-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.why-body p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ─── CONTACT ────────────────────────────────── */

.contact {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  padding-top: 8px;
}

.contact-info h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  margin-top: 16px;
}

.contact-info > p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 36px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-icon {
  font-size: 1.1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 8px;
  flex-shrink: 0;
}

.contact-detail a,
.contact-detail span {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition);
}
.contact-detail a:hover {
  color: var(--accent);
}

/* Form */

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-faint);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-top: 14px;
}

/* ─── FOOTER ─────────────────────────────────── */

.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  color: var(--text-faint);
  font-size: 0.8rem;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ─── ANIMATIONS ─────────────────────────────── */

.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.services-grid .fade-up:nth-child(1) { transition-delay: 0.05s; }
.services-grid .fade-up:nth-child(2) { transition-delay: 0.12s; }
.services-grid .fade-up:nth-child(3) { transition-delay: 0.19s; }
.services-grid .fade-up:nth-child(4) { transition-delay: 0.26s; }
.services-grid .fade-up:nth-child(5) { transition-delay: 0.33s; }
.services-grid .fade-up:nth-child(6) { transition-delay: 0.40s; }

.why-grid .fade-up:nth-child(1) { transition-delay: 0.05s; }
.why-grid .fade-up:nth-child(2) { transition-delay: 0.12s; }
.why-grid .fade-up:nth-child(3) { transition-delay: 0.19s; }
.why-grid .fade-up:nth-child(4) { transition-delay: 0.26s; }

/* ─── RESPONSIVE ─────────────────────────────── */

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 72px 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.98);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 20px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .nav-inner .btn-sm {
    display: none;
  }

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

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .contact-form {
    padding: 28px 20px;
  }

  .why-card {
    flex-direction: column;
    gap: 12px;
    padding: 28px 24px;
  }

  .why-num {
    font-size: 1.8rem;
    min-width: auto;
  }
}