/* ========================================
   LAYOUT & NAVIGATION
   ======================================== */

section {
  padding: 6rem 5rem;
  position: relative;
  z-index: 1;
}

/* ---- Navigation ---- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 5rem;
  background: rgba(8, 8, 15, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 0.5px solid var(--border);
  transition: transform 0.3s ease, background 0.3s ease;
}

.nav-hidden {
  transform: translateY(-100%);
}

.nav-scrolled {
  background: rgba(8, 8, 15, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-2);
  font-size: 0.9rem;
  font-weight: 400;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--pink));
  transition: width var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text);
}

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

.nav-cta {
  background: linear-gradient(135deg, var(--purple), var(--pink)) !important;
  -webkit-background-clip: unset !important;
  -webkit-text-fill-color: unset !important;
  background-clip: unset !important;
  color: #fff !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 100px;
  font-weight: 500 !important;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast) !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.nav-cta::after {
  display: none !important;
}

/* ---- Mobile Menu Button ---- */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 101;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Mobile Menu Overlay ---- */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 8, 15, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition-fast);
}

.mobile-menu a:hover {
  color: var(--purple);
}

/* ---- Footer ---- */
footer {
  padding: 2rem 5rem;
  border-top: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.footer-copy {
  color: var(--text-3);
  font-size: 0.875rem;
}

.footer-copy span {
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.footer-link {
  color: var(--text-3);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--purple);
}

.footer-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-3);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.footer-back:hover {
  color: var(--purple);
}

/* ---- Scroll Progress Bar ---- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--purple), var(--pink), var(--cyan));
  z-index: 9998;
  transition: width 0.1s linear;
  will-change: width;
}

/* ---- Loading Screen ---- */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-text {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  section {
    padding: 4rem 1.5rem;
  }

  footer {
    padding: 1.5rem;
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
}