/* =============================================
   ZENTRIX AI – Main Stylesheet
   ============================================= */

:root {
  --bg-primary:    #060b1a;
  --bg-secondary:  #0a1128;
  --bg-card:       #0d1530;
  --bg-card-hover: #111d3d;
  --cyan:          #00d4ff;
  --cyan-dim:      rgba(0, 212, 255, 0.15);
  --purple:        #7c3aed;
  --purple-dim:    rgba(124, 58, 237, 0.15);
  --blue:          #2563eb;
  --text-primary:  #f0f4ff;
  --text-secondary:#94a3b8;
  --border:        rgba(0, 212, 255, 0.12);
  --gradient:      linear-gradient(135deg, #00d4ff, #7c3aed);
  --gradient-soft: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(124,58,237,0.1));
  --nav-height:    72px;
  --radius-sm:     8px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --transition:    0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─────────────────────────────────── */
*, *::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(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
input, textarea, button { font-family: inherit; }

/* ─── Utility ────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section { padding: 100px 0; }

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 56px;
  line-height: 1.7;
}

/* ─── Buttons ────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}

.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: var(--transition);
}

#navbar.scrolled {
  background: rgba(6, 11, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-z {
  width: 38px;
  height: 38px;
  background: var(--gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.logo-ai {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.btn-nav {
  background: var(--gradient) !important;
  color: #fff !important;
  padding: 9px 20px !important;
}

.btn-nav:hover { box-shadow: 0 4px 20px rgba(0,212,255,0.3); }

/* ─── Dropdown ───────────────────────────────── */
.nav-dropdown { position: relative; }

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.dropdown-arrow {
  width: 10px;
  height: 10px;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.nav-dropdown.open .dropdown-arrow { transform: rotate(180deg); }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 240px;
  background: rgba(10, 17, 40, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary) !important;
  transition: var(--transition);
  background: none !important;
}

.dropdown-item:hover {
  background: var(--cyan-dim) !important;
  color: var(--text-primary) !important;
}

.dropdown-item-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
}

.dropdown-item-icon svg { width: 18px; height: 18px; }

.dropdown-item-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dropdown-item-text strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.dropdown-item-text small {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ─── Hero ───────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.12), transparent 70%);
  top: -100px; right: -100px;
}

.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.15), transparent 70%);
  bottom: -50px; left: -100px;
}

.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(37,99,235,0.1), transparent 70%);
  top: 40%; left: 40%;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
  padding: 60px 24px 60px calc((100vw - 1200px) / 2 + 24px);
}

.hero-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.25);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease both;
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeInUp 0.7s 0.1s ease both;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 36px;
  animation: fadeInUp 0.7s 0.2s ease both;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInUp 0.7s 0.3s ease both;
}

.hero-motto {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  animation: fadeInUp 0.7s 0.4s ease both;
}

.hero-motto span:not(.dot) {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-motto .dot { color: var(--border); }

.hero-visual {
  position: absolute;
  right: calc((100vw - 1200px) / 2);
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 420px;
  height: 420px;
}

.z-logo-hero {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 10rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 3;
  animation: float 4s ease-in-out infinite;
}

.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  animation: spin linear infinite;
}

.ring-1 {
  width: 260px; height: 260px;
  border-color: rgba(0,212,255,0.2);
  animation-duration: 20s;
}

.ring-2 {
  width: 340px; height: 340px;
  border-color: rgba(124,58,237,0.15);
  animation-duration: 30s;
  animation-direction: reverse;
}

.ring-3 {
  width: 420px; height: 420px;
  border-color: rgba(0,212,255,0.08);
  animation-duration: 40s;
}

/* ─── About ──────────────────────────────────── */
.about { background: var(--bg-secondary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.about-visual {
  display: flex;
  justify-content: center;
}

.ai-card {
  width: 280px;
  height: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-soft);
  opacity: 0.5;
}

.ai-chip {
  position: relative;
  z-index: 1;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chip-inner {
  width: 64px;
  height: 64px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.chip-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.chip-lines span {
  position: absolute;
  background: var(--cyan);
  opacity: 0.4;
}

.chip-lines span:nth-child(1) { width: 12px; height: 1px; top: 20px; left: 0; }
.chip-lines span:nth-child(2) { width: 12px; height: 1px; top: 28px; left: 0; }
.chip-lines span:nth-child(3) { width: 12px; height: 1px; bottom: 20px; right: 0; }
.chip-lines span:nth-child(4) { width: 12px; height: 1px; bottom: 28px; right: 0; }
.chip-lines span:nth-child(5) { width: 1px; height: 12px; left: 20px; top: 0; }
.chip-lines span:nth-child(6) { width: 1px; height: 12px; left: 28px; top: 0; }
.chip-lines span:nth-child(7) { width: 1px; height: 12px; right: 20px; bottom: 0; }
.chip-lines span:nth-child(8) { width: 1px; height: 12px; right: 28px; bottom: 0; }

.ai-card-text {
  position: relative;
  z-index: 1;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ─── Services ───────────────────────────────── */
.services { background: var(--bg-primary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: var(--transition);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0,212,255,0.25);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 52px;
  height: 52px;
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--cyan);
  transition: var(--transition);
}

.service-icon svg { width: 24px; height: 24px; }

.service-card:hover .service-icon {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
}

.service-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ─── Why Us ─────────────────────────────────── */
.why-us { background: var(--bg-secondary); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.why-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
}

.why-card:hover {
  border-color: rgba(124,58,237,0.3);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.why-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--purple-dim);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a78bfa;
}

.why-icon svg { width: 22px; height: 22px; }

.why-content h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.why-content p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── Vision ─────────────────────────────────── */
.vision { background: var(--bg-primary); }

.vision-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.vision-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.vision-pillars {
  display: flex;
  gap: 16px;
}

.pillar {
  flex: 1;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.pillar span {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.vision-visual {
  display: flex;
  justify-content: center;
}

.globe-container {
  position: relative;
  width: 300px;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.globe {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.globe-inner { width: 100%; height: 100%; }
.globe-inner svg { width: 100%; height: 100%; }

.globe-ring {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.2);
  animation: spin 15s linear infinite;
}

.globe-ring.r2 {
  inset: -40px;
  border-color: rgba(124,58,237,0.15);
  animation-duration: 25s;
  animation-direction: reverse;
}

.glow-ring {
  position: absolute;
  inset: -60px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(0,212,255,0.06), transparent 70%);
}

/* ─── Contact ────────────────────────────────── */
.contact { background: var(--bg-secondary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--text-primary);
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 28px;
}

.contact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
}

.contact-icon svg { width: 20px; height: 20px; }

.contact-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-role {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 0.88rem;
  color: var(--cyan);
  transition: var(--transition);
}

.contact-value:hover { opacity: 0.8; }

/* ─── Form ───────────────────────────────────── */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition);
  resize: vertical;
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(148,163,184,0.4); }

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

.form-success {
  display: none;
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: var(--radius-sm);
  color: var(--cyan);
  font-size: 0.9rem;
  text-align: center;
}

.form-success.visible { display: block; }

/* ─── Footer ─────────────────────────────────── */
.footer { background: var(--bg-primary); border-top: 1px solid var(--border); }

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding: 64px 0 48px;
}

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; max-width: 260px; }

.footer-links h4,
.footer-contact h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links li,
.footer-contact p {
  margin-bottom: 10px;
  font-size: 0.87rem;
  color: var(--text-secondary);
}

.footer-links a,
.footer-contact a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-links a:hover,
.footer-contact a:hover { color: var(--cyan); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.footer-motto {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

/* ─── Animations ─────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-14px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 1100px) {
  .hero-visual { right: 20px; width: 340px; height: 340px; }
  .z-logo-hero { font-size: 8rem; }
  .ring-1 { width: 220px; height: 220px; }
  .ring-2 { width: 280px; height: 280px; }
  .ring-3 { width: 340px; height: 340px; }
}

@media (max-width: 900px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    background: rgba(6,11,26,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px 32px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }

  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--border);
    border-radius: 0;
    background: transparent;
    backdrop-filter: none;
    margin: 0 0 0 16px;
    padding: 4px 0;
    display: none;
  }

  .nav-dropdown.open .dropdown-menu { display: block; }
  .nav-dropdown.open .dropdown-menu { transform: none; }

  .hero-content { max-width: 100%; padding: 60px 24px; }
  .hero-visual { display: none; }

  .about-grid,
  .vision-inner { grid-template-columns: 1fr; gap: 40px; }

  .about-visual { display: none; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }

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

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

  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .services-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-secondary { width: 100%; justify-content: center; }
  .about-stats { flex-wrap: wrap; }
  .vision-pillars { flex-direction: column; }
}