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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: #081118;
  overflow-x: hidden;
}

::selection {
  background: rgba(125, 211, 192, 0.2);
  color: #f0fdfa;
}

/* ── Hero Gradient ── */
.hero-gradient {
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(30, 58, 95, 0.8) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 30% 60%, rgba(79, 184, 164, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 70% 30%, rgba(125, 211, 192, 0.08) 0%, transparent 60%),
    linear-gradient(180deg, #050a10 0%, #0d1b2a 50%, #081118 100%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.orb-1 {
  background: radial-gradient(circle, rgba(125, 211, 192, 0.5) 0%, transparent 70%);
}

.orb-2 {
  background: radial-gradient(circle, rgba(30, 58, 95, 0.8) 0%, transparent 70%);
}

/* ── Nav ── */
#nav {
  background: transparent;
  backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background 0.5s ease, backdrop-filter 0.5s ease, border-color 0.5s ease;
}

#nav.scrolled {
  background: rgba(8, 17, 24, 0.85);
  backdrop-filter: blur(20px);
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #7dd3c0;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link:hover {
  color: #7dd3c0 !important;
}

/* ── Mobile Menu ── */
#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

#mobile-menu.open .mobile-link {
  animation: fadeUp 0.4s ease forwards;
  opacity: 0;
}

#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.menu-line {
  display: block;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#menu-toggle.active .menu-line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

#menu-toggle.active .menu-line:nth-child(2) {
  transform: translateY(-5px) rotate(-45deg);
  opacity: 0;
}

/* ── Hero Animations ── */
.hero-label { animation: fadeInUp 0.8s ease 0.2s forwards; }
.hero-headline { animation: fadeInUp 0.8s ease 0.4s forwards; }
.hero-subtitle { animation: fadeInUp 0.8s ease 0.6s forwards; }
.hero-ctas { animation: fadeInUp 0.8s ease 0.8s forwards; }
.hero-scroll { animation: fadeIn 1s ease 1.2s forwards; }

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── Reveal Animations ── */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left {
  transform: translateX(-30px);
}

.reveal-right {
  transform: translateX(30px);
}

.reveal-up.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* ── Form ── */
#contact-form input:focus,
#contact-form textarea:focus {
  border-color: rgba(125, 211, 192, 0.6) !important;
}

#contact-form input::placeholder,
#contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.15);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #081118;
}

::-webkit-scrollbar-thumb {
  background: rgba(125, 211, 192, 0.2);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(125, 211, 192, 0.4);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero-gradient {
    background:
      radial-gradient(ellipse 100% 80% at 50% 30%, rgba(30, 58, 95, 0.9) 0%, transparent 70%),
      radial-gradient(ellipse 60% 40% at 20% 70%, rgba(79, 184, 164, 0.1) 0%, transparent 60%),
      linear-gradient(180deg, #050a10 0%, #0d1b2a 60%, #081118 100%);
  }

  .orb-1 {
    width: 300px !important;
    height: 300px !important;
    -webkit-mask: none;
    mask: none;
  }

  .orb-2 {
    width: 200px !important;
    height: 200px !important;
    -webkit-mask: none;
    mask: none;
  }
}