/* Base layout components */
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.flex-column { display: flex; flex-direction: column; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

@media (max-width: 992px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.25rem 0;
  transition: all 0.3s ease;
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 11, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 101;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-purple);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px var(--accent-purple);
}

@media (max-width: 576px) {
  .logo {
    font-size: 1.25rem;
  }
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
  width: 30px;
  height: 20px;
  position: relative;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  position: absolute;
  transition: all 0.3s ease;
}

.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 9px; }
.mobile-menu-btn span:nth-child(3) { top: 18px; }

.mobile-menu-btn.active span:nth-child(1) { top: 9px; transform: rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { top: 9px; transform: rotate(-45deg); }

@media (max-width: 992px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg-dark);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    opacity: 0;
    visibility: hidden;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links a {
    font-size: 1.5rem;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-cta {
    display: none;
  }
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 2.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.06), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--glass-highlight);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: 100px;
  font-weight: 600;
  font-family: var(--font-body);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  color: white;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
  position: relative;
  z-index: 1;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: inherit;
  z-index: -1;
  transition: opacity 0.3s ease;
  opacity: 0;
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--glass-highlight);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

/* Footer Element */
.site-footer {
  border-top: 1px solid var(--glass-border);
  background: rgba(10, 10, 11, 0.5);
  backdrop-filter: blur(20px);
  padding: 5rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 576px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

.footer-col h4 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.footer-col p {
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

@media (max-width: 576px) {
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}