/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-normal) var(--ease-out-expo);
  border: none;
}
.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.2);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}
.btn-primary--large {
  padding: 0.875rem 2rem;
  font-size: var(--text-body);
}
.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* CARDS */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-normal) var(--ease-out-expo),
              transform var(--duration-normal) var(--ease-out-expo),
              box-shadow var(--duration-normal) var(--ease-out-expo);
}
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.08);
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}
.card__title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.card__description {
  color: var(--text-secondary);
  font-size: var(--text-small);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-4);
}
.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.card__footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

/* TAGS */
.tag {
  display: inline-block;
  padding: 2px var(--space-2);
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--accent-primary);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* BADGE */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  color: var(--accent-primary);
}

/* NAVIGATION */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: all var(--duration-normal) var(--ease-out-expo);
}
.nav--scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  transition: opacity var(--duration-fast);
}
.nav__logo:hover { opacity: 0.7; }
.nav__logo-bold { font-weight: 700; color: var(--text-primary); transition: color var(--duration-normal); }
.nav__logo-light { font-weight: 400; color: var(--text-muted); margin-left: 1px; transition: color var(--duration-normal); }

/* On dark hero background, make logo white */
.nav:not(.nav--scrolled) .nav__logo-bold { color: #fff; }
.nav:not(.nav--scrolled) .nav__logo-light { color: rgba(255,255,255,0.6); }
.nav:not(.nav--scrolled) .nav__link { color: rgba(255,255,255,0.7); }
.nav:not(.nav--scrolled) .nav__link:hover,
.nav:not(.nav--scrolled) .nav__link--active { color: #fff; }
.nav:not(.nav--scrolled) .nav__toggle-bar { background: #fff; }
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--text-tertiary);
  position: relative;
  transition: color var(--duration-fast);
  font-weight: 500;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--accent-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}
.nav__link:hover, .nav__link--active { color: var(--text-primary); }
.nav__link:hover::after, .nav__link--active::after { transform: scaleX(1); }
.nav__link--cta {
  background: var(--accent-gradient);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.75rem;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
  transition: box-shadow var(--duration-normal), transform var(--duration-fast);
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover { box-shadow: var(--shadow-glow); transform: translateY(-1px); }

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: 1001;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-out-expo), opacity var(--duration-fast);
}
.nav__toggle--open .nav__toggle-bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__toggle--open .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle--open .nav__toggle-bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out-expo), visibility var(--duration-slow);
}
.mobile-menu--open { opacity: 1; visibility: visible; }
.mobile-menu__list { text-align: center; }
.mobile-menu__item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out-expo), transform var(--duration-slow) var(--ease-out-expo);
}
.mobile-menu--open .mobile-menu__item { opacity: 1; transform: translateY(0); }
.mobile-menu--open .mobile-menu__item:nth-child(1) { transition-delay: 80ms; }
.mobile-menu--open .mobile-menu__item:nth-child(2) { transition-delay: 140ms; }
.mobile-menu--open .mobile-menu__item:nth-child(3) { transition-delay: 200ms; }
.mobile-menu--open .mobile-menu__item:nth-child(4) { transition-delay: 260ms; }
.mobile-menu--open .mobile-menu__item:nth-child(5) { transition-delay: 320ms; }
.mobile-menu__link {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  padding: var(--space-3) 0;
  transition: color var(--duration-fast);
}
.mobile-menu__link:hover { color: var(--accent-primary); }

/* FOOTER - dark section */
.footer {
  background: var(--bg-dark);
  color: var(--text-on-dark-secondary);
  padding: var(--space-12) 0 var(--space-6);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-8);
}
.footer .nav__logo-bold { color: var(--text-on-dark); }
.footer .nav__logo-light { color: var(--text-on-dark-secondary); }
.footer__tagline {
  color: var(--text-on-dark-secondary);
  margin-top: var(--space-3);
  max-width: 260px;
  font-size: var(--text-small);
}
.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.footer__social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-on-dark-secondary);
  transition: all var(--duration-fast);
}
.footer__social-link svg { width: 16px; height: 16px; }
.footer__social-link:hover { color: #fff; border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.05); }
.footer__heading {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-on-dark-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-4);
}
.footer__list { display: flex; flex-direction: column; gap: var(--space-2); }
.footer__link { color: rgba(255,255,255,0.75); font-size: var(--text-small); transition: color var(--duration-fast); }
.footer__link:hover { color: #fff; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-6);
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}