/* ═══════════ NAVIGATION ═══════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--duration-normal);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}
.nav-logo-mark {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}
.nav-logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.nav-logo-text {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.nav-logo-text strong {
  font-weight: 800;
  color: var(--primary-600);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  align-items: center;
}
.nav-link {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--duration-fast);
  position: relative;
  padding: var(--space-2) 0;
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-600);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-normal);
}
.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-6) var(--container-pad);
  box-shadow: var(--shadow-lg);
  z-index: 999;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu .nav-link {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  border-bottom: 1px solid var(--gray-100);
}
.mobile-menu .nav-link:last-child {
  border-bottom: none;
}
.mobile-menu .btn {
  width: 100%;
  justify-content: center;
  margin-top: var(--space-4);
}

/* ═══════════ BUTTONS ═══════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}
.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--primary-600);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-700);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-600);
  border: 1.5px solid var(--primary-200);
}
.btn-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  color: var(--primary-700);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  background: var(--gray-100);
  color: var(--text-primary);
}

.btn-accent {
  background: var(--accent-500);
  color: var(--gray-900);
  font-weight: 700;
}
.btn-accent:hover {
  background: var(--accent-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-white {
  background: var(--white);
  color: var(--primary-700);
}
.btn-white:hover {
  background: var(--gray-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 16px 36px;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}
.btn-sm {
  padding: 8px 18px;
  font-size: var(--text-xs);
}

/* ═══════════ CARDS ═══════════ */
.card {
  background: var(--surface-card);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--gray-300);
}
.card-img {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow);
}
.card:hover .card-img img {
  transform: scale(1.05);
}
.card-body {
  padding: var(--space-6);
}
.card-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.card-badge.live {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}
.card-badge.dev {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary-500);
}

/* ═══════════ TAG / PILL ═══════════ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--gray-100);
  color: var(--text-secondary);
}

/* ═══════════ ICON BOX ═══════════ */
.icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.icon-box svg {
  width: 24px;
  height: 24px;
}
.icon-box.primary {
  background: var(--primary-50);
  color: var(--primary-600);
}
.icon-box.accent {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-600);
}

/* ═══════════ FOOTER ═══════════ */
.site-footer {
  background: var(--surface-darker);
  color: var(--gray-400);
  padding: var(--space-16) 0 var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
}
.footer-brand .nav-logo-text {
  color: var(--white);
}
.footer-brand p {
  color: var(--gray-400);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  max-width: 280px;
  margin-top: var(--space-4);
}
.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-sm);
  color: var(--gray-400);
  transition: all var(--duration-fast);
}
.footer-social a:hover {
  border-color: var(--primary-400);
  color: var(--primary-400);
  background: rgba(99, 102, 241, 0.1);
}
.footer-social a svg {
  width: 16px;
  height: 16px;
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--white);
  margin-bottom: var(--space-5);
}
.footer-col ul li {
  margin-bottom: var(--space-2);
}
.footer-col a {
  color: var(--gray-400);
  font-size: var(--text-sm);
  transition: color var(--duration-fast);
}
.footer-col a:hover {
  color: var(--primary-300);
}

.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--gray-500);
}

/* ═══════════ SCROLL TO TOP ═══════════ */
.scroll-top-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--primary-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  transform: translateY(16px);
  transition: all var(--duration-normal);
  box-shadow: var(--shadow-lg);
}
.scroll-top-btn.visible {
  opacity: 1;
  transform: none;
}
.scroll-top-btn:hover {
  background: var(--primary-700);
  transform: translateY(-2px);
}
.scroll-top-btn svg {
  width: 20px;
  height: 20px;
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .btn { display: none; }
  .mobile-toggle { display: flex; }
}
@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}