/* ============================================================
   NAV + FOOTER — Innovation Earth Projects style shell
   Depends on: tokens.css, base.css
   ============================================================ */

/* ---------- Background orbs ---------- */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.bg-orbs .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  will-change: transform;
}
.orb--teal {
  width: 480px; height: 480px;
  background: radial-gradient(circle, var(--teal) 0%, transparent 70%);
  top: -120px; left: -120px;
  animation: float1 20s ease-in-out infinite;
}
.orb--cyan {
  width: 420px; height: 420px;
  background: radial-gradient(circle, var(--cyan) 0%, transparent 70%);
  top: 40%; right: -140px;
  animation: float2 24s ease-in-out infinite;
}
.orb--lime {
  width: 360px; height: 360px;
  background: radial-gradient(circle, var(--lime) 0%, transparent 70%);
  bottom: -100px; left: 30%;
  animation: float3 28s ease-in-out infinite;
}
@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(80px, 60px) scale(1.1); }
}
@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(-100px, 80px) scale(0.95); }
}
@keyframes float3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(60px, -80px) scale(1.05); }
}

main, .nav, .footer { position: relative; z-index: 1; }

/* ---------- Development ribbon (top of page) ---------- */
.dev-ribbon {
  background: linear-gradient(90deg, var(--warn), #E0A400);
  color: #2B1D00;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 8px var(--s-4);
  position: relative;
  z-index: 60;
}
.dev-ribbon a {
  text-decoration: underline;
  text-underline-offset: 2px;
  color: inherit;
  font-weight: 700;
}
.dev-ribbon i { margin-right: 6px; }

/* ---------- NAV ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  width: min(var(--container), 100% - 2rem);
  margin-inline: auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: var(--s-5);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--teal-deep);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.nav__mark { display: inline-flex; color: var(--teal); }
.nav__logo-img { display: block; width: auto; height: 32px; }
.nav__wordmark { white-space: nowrap; }
.nav__version {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--warn);
  background: var(--warn-bg);
  border: 1px solid rgba(198, 138, 0, 0.3);
  border-radius: var(--r-pill);
  padding: 2px 8px;
  vertical-align: middle;
}

.nav__links {
  display: flex;
  gap: var(--s-5);
  margin-left: auto;
}
.nav__links a {
  position: relative;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav__links a:hover { color: var(--teal); border-color: var(--cyan); }
.nav__links a.is-active { color: var(--teal-deep); border-color: var(--cyan); }

/* Underline draws in from the left on hover */
.nav__links a::before {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(.2, .7, .2, 1);
}
.nav__links a:hover::before,
.nav__links a.is-active::before { transform: scaleX(1); }

/* Brand logo gently floats */
@keyframes iepLogoBob {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-2px) rotate(-3deg); }
}
.nav__logo-img { animation: iepLogoBob 5s ease-in-out infinite; }

.nav__cta { margin-left: var(--s-2); }

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  width: 40px;
  height: 40px;
  color: var(--ink);
  align-items: center;
  justify-content: center;
}
.nav__toggle:hover { border-color: var(--cyan); }

/* ---------- FOOTER ---------- */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--s-8) 0 var(--s-5);
  margin-top: var(--s-9);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.8fr 0.9fr 0.9fr 1.1fr;
  gap: var(--s-6);
  margin-bottom: var(--s-7);
}
@media (max-width: 1080px) {
  .footer__inner { grid-template-columns: repeat(2, 1fr); }
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-weight: 700;
  color: var(--teal-deep);
  margin-bottom: var(--s-3);
}
.footer__tagline {
  color: var(--muted);
  font-size: var(--fs-sm);
  margin: 0;
  max-width: 34ch;
}

.footer__col h4 {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-3);
  font-weight: 600;
}
.footer__col ul { list-style: none; padding: 0; margin: 0; }
.footer__col li { margin-bottom: var(--s-2); }
.footer__col a {
  color: var(--ink-soft);
  font-size: var(--fs-sm);
  transition: color var(--dur) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer__col a:hover { color: var(--teal); }
.footer__col a i {
  width: 16px;
  text-align: center;
  color: var(--muted);
  transition: transform 0.35s cubic-bezier(.2,.7,.2,1), color var(--dur) var(--ease);
}
.footer__col a:hover i { color: var(--teal); transform: translateX(3px) rotate(-8deg); }

.footer__note {
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.5;
  margin: 0 0 var(--s-2);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-5);
  border-top: 1px solid var(--border-soft);
  color: var(--muted);
  font-size: var(--fs-sm);
  flex-wrap: wrap;
  gap: var(--s-3);
}
.footer__legal a {
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}
.footer__legal a:hover { color: var(--teal); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--s-4);
    gap: var(--s-3);
    box-shadow: var(--shadow-md);
  }
  .nav__links.is-open { display: flex; }
  .nav__cta { display: none; }
  .nav__toggle { display: inline-flex; margin-left: auto; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .nav__logo-img { animation: none !important; }
  .nav__links a::before { transition: none !important; }
  .footer__col a i { transition: none !important; }
  .footer__col a:hover i { transform: none; }
  .bg-orbs .orb { animation: none !important; }
}