/* =============================================
   AIGORYTHM — Design System
   ============================================= */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --navy: #0f1c2e;
  --navy-mid: #1a2b4a;
  --steel: #2d5f8a;
  --sky: #4a90c4;
  --sky-light: #7ab8dc;
  --white: #ffffff;
  --off-white: #f5f7fa;
  --muted: #6b7a8d;
  --border: #e2e8f0;
  --card-bg: rgba(255,255,255,0.04);
  --glass: rgba(255,255,255,0.06);
  --gradient: linear-gradient(135deg, var(--navy-mid), var(--steel));
  --gradient-accent: linear-gradient(135deg, var(--steel), var(--sky));
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--white);
  color: var(--navy);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- Typography ---- */
h1, h2, h3, h4 { font-family: 'Outfit', sans-serif; line-height: 1.2; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p  { color: var(--muted); line-height: 1.75; }

a { color: inherit; text-decoration: none; }

/* ---- Layout ---- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }

/* ---- Page switching ---- */
section:not(.page-active) { display: none; }
/* #home has an ID rule `display:flex` with higher specificity — override it explicitly */
#home:not(.page-active) { display: none; }
#home.page-active { display: flex; }
.page-active { animation: pageIn 0.32s ease both; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Section label ---- */
.section-label {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--sky);
  background: rgba(74,144,196,0.1);
  border: 1px solid rgba(74,144,196,0.25);
  border-radius: 50px;
  padding: 4px 14px;
  margin-bottom: 18px;
}

.section-heading { margin-bottom: 16px; color: var(--navy); }
.section-sub { max-width: 560px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.btn-primary {
  background: var(--gradient-accent);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(45,95,138,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(45,95,138,0.45); }
.btn-outline {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.3);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.6); }

/* ---- NAV ---- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(15, 28, 46, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 0;
  box-shadow: 0 2px 24px rgba(0,0,0,0.3);
}

/* ---- Nav on light-background pages (About, Services, Contact) ---- */
#navbar.light-page {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.07), 0 2px 16px rgba(0,0,0,0.05);
}
#navbar.light-page.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.09);
}
#navbar.light-page .nav-logo-img { filter: brightness(0); }
#navbar.light-page .nav-logo-text { color: var(--navy); }
#navbar.light-page .nav-links a { color: var(--muted); }
#navbar.light-page .nav-links a:hover,
#navbar.light-page .nav-links a.active { color: var(--navy); }
#navbar.light-page .nav-links a::after { background: var(--steel); }
#navbar.light-page .btn-outline {
  border-color: rgba(45,95,138,0.45);
  color: var(--navy);
}
#navbar.light-page .btn-outline:hover {
  background: rgba(45,95,138,0.07);
  border-color: var(--steel);
}
#navbar.light-page .hamburger span { background: var(--navy); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo img, .nav-logo-img { height: 38px; width: auto; object-fit: contain; }
.nav-logo-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--sky);
  transition: width var(--transition);
  border-radius: 2px;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta { margin-left: 8px; padding: 10px 24px !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0;
  background: rgba(15, 28, 46, 0.97);
  backdrop-filter: blur(20px);
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition);
}
.mobile-nav a:hover { color: var(--sky); }

/* ---- HERO ---- */
#home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--navy);
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(45,95,138,0.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(74,144,196,0.12) 0%, transparent 60%);
}
.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}
.hero-visual {
  width: 100%;
  border-radius: 20px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.93;
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0%,
    rgba(0,0,0,0.5) 12%,
    black 28%
  );
  mask-image: linear-gradient(
    to right,
    transparent 0%,
    rgba(0,0,0,0.5) 12%,
    black 28%
  );
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74,144,196,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,144,196,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content {
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(74,144,196,0.12);
  border: 1px solid rgba(74,144,196,0.3);
  border-radius: 50px;
  padding: 6px 18px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sky-light);
  margin-bottom: 28px;
}
.hero-badge span.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--sky);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-title { color: var(--white); margin-bottom: 24px; }
.hero-title .gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-motto {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 40px;
  border-left: 3px solid var(--sky);
  padding-left: 16px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
}
.hero-stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.05em;
}

/* ---- ABOUT ---- */
#about { background: var(--off-white); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text p { margin-top: 20px; font-size: 1.05rem; }
.about-quote {
  margin-top: 32px;
  padding: 20px 24px;
  border-left: 3px solid var(--sky);
  background: rgba(74,144,196,0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--steel);
  font-style: italic;
}
.about-cards { display: flex; flex-direction: column; gap: 16px; }
.about-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.about-card:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }
.about-card-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.about-card-title { font-family: 'Outfit', sans-serif; font-weight: 600; font-size: 1rem; color: var(--navy); }
.about-card-sub { font-size: 0.85rem; color: var(--muted); margin-top: 2px; }

/* ---- SERVICES ---- */
#services { background: var(--white); }
.services-header { text-align: center; margin-bottom: 60px; }
.services-header .section-sub { margin: 0 auto; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(74,144,196,0.2); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(45,95,138,0.1), rgba(74,144,196,0.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.service-card h3 { color: var(--navy); margin-bottom: 10px; }
.service-card p { font-size: 0.9rem; }

/* ---- TECHNOLOGIES ---- */
#technologies { background: var(--navy); position: relative; overflow: hidden; }
#technologies::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45,95,138,0.2) 0%, transparent 70%);
}
.tech-header { text-align: center; margin-bottom: 64px; }
.tech-header .section-label { background: rgba(74,144,196,0.15); }
.tech-header .section-heading { color: var(--white); }
.tech-header .section-sub { color: rgba(255,255,255,0.5); margin: 0 auto; }
.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}
.tech-left {
  position: sticky;
  top: 88px;
}
.tech-expertise-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 24px;
}
.tech-list { display: flex; flex-direction: column; gap: 12px; }
.tech-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: default;
}
.tech-item:hover { background: rgba(255,255,255,0.09); border-color: rgba(74,144,196,0.3); transform: translateX(4px); }
.tech-item-icon { font-size: 1.3rem; width: 32px; text-align: center; }
.tech-item-name { font-family: 'Outfit', sans-serif; font-weight: 600; color: var(--white); font-size: 0.95rem; }
.tech-item-desc { font-size: 0.8rem; color: rgba(255,255,255,0.4); margin-top: 2px; }
.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.badge {
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px solid rgba(74,144,196,0.3);
  color: var(--sky-light);
  background: rgba(74,144,196,0.08);
}

/* Tech infographic panels */
.tech-panels { display: flex; flex-direction: column; gap: 16px; }
.tech-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  height: 220px;
}
.tech-panel:hover { border-color: rgba(74,144,196,0.4); transform: translateY(-3px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.tech-panel img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: top;
}
.tech-panel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,28,46,0.8) 0%, transparent 50%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: var(--transition);
}
.tech-panel:hover .tech-panel-overlay { opacity: 1; }
.tech-panel-label {
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--white);
  font-size: 1.5rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ---- CONTACT ---- */
#contact { background: var(--off-white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 20px; margin-top: 36px; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.contact-info-item:hover { border-color: rgba(74,144,196,0.3); box-shadow: var(--shadow-sm); }
.contact-info-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-info-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 600; font-family: 'Outfit', sans-serif; }
.contact-info-value { font-size: 0.95rem; color: var(--navy); font-weight: 500; margin-top: 3px; }
.contact-info-value a { color: var(--steel); transition: color var(--transition); }
.contact-info-value a:hover { color: var(--sky); }

/* Contact form */
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.contact-form h3 { color: var(--navy); margin-bottom: 8px; }
.contact-form > p { font-size: 0.9rem; margin-bottom: 28px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--navy);
  background: var(--off-white);
  transition: var(--transition);
  outline: none;
  resize: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--sky);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(74,144,196,0.12);
}
.form-group textarea { height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.btn-full { width: 100%; justify-content: center; padding: 15px 32px; }

/* Form submission feedback */
.form-success {
  text-align: center;
  padding: 48px 24px;
}
.form-success-icon { font-size: 3rem; margin-bottom: 16px; }
.form-success h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.form-success p { font-size: 0.95rem; }
.form-error-msg {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(192,57,43,0.06);
  border: 1px solid rgba(192,57,43,0.2);
  color: #b03a2e;
  font-size: 0.85rem;
  text-align: center;
}
.btn-sending { opacity: 0.7; cursor: not-allowed; }

/* ---- FOOTER ---- */
footer {
  background: var(--navy);
  padding: 48px 0 28px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-logo { display: flex; align-items: center; gap: 12px; }
.footer-logo img, .footer-logo-img { height: 34px; width: auto; object-fit: contain; }
.footer-logo-text { font-family: 'Outfit', sans-serif; font-weight: 700; color: var(--white); font-size: 1.1rem; }
.footer-logo-sub { font-size: 0.75rem; color: rgba(255,255,255,0.35); letter-spacing: 0.05em; }
.footer-links { display: flex; gap: 32px; }
.footer-links a {
  font-family: 'Outfit', sans-serif;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--sky); }
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.6);
  font-size: 1rem;
  transition: var(--transition);
}
.footer-social a:hover { background: rgba(74,144,196,0.2); border-color: rgba(74,144,196,0.4); color: var(--sky); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.3); }
.footer-legal { font-size: 0.72rem !important; color: rgba(255,255,255,0.2) !important; line-height: 1.6; }
.footer-legal a { color: rgba(255,255,255,0.35); text-decoration: none; }
.footer-legal a:hover { color: rgba(255,255,255,0.6); }
.footer-tagline {
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255,255,255,0.3);
  font-style: italic;
}

/* ---- Scroll animations ---- */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }
.fade-up.delay-5 { transition-delay: 0.5s; }
.fade-up.delay-6 { transition-delay: 0.6s; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  section { padding: 72px 0; }
  .hero-container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-layout { grid-template-columns: 1fr; gap: 40px; }
  .tech-left { position: static; }
  .tech-panel { height: 200px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-stats { gap: 32px; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .services-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { display: none; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}