/* ═══════════════════════════════════════════════════════════════════
   css/nav.css — Navigation
═══════════════════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition:
    background var(--t-med) var(--ease-std),
    border-color var(--t-med) var(--ease-std),
    box-shadow var(--t-med) var(--ease-std);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(8, 10, 16, 0.8);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border-color: var(--border);
  box-shadow: 0 1px 48px rgba(0, 0, 0, 0.45);
}

/* ── Inner ────────────────────────────────────────────────────── */
.nav__inner {
  width: min(var(--container-w), 100%);
  margin-inline: auto;
  padding-inline: var(--container-px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ─────────────────────────────────────────────────────── */
.nav__logo {
  font-family: var(--ff-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-xl);
  text-decoration: none;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  flex-shrink: 0;
  position: relative;
  padding: 4px 8px;
}

.nav__logo::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: linear-gradient(var(--bg-1), var(--bg-1)) padding-box,
              linear-gradient(135deg, var(--cyan), var(--violet)) border-box;
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease-std);
}

.nav__logo:hover::before { opacity: 1; }

/* ── Desktop links ────────────────────────────────────────────── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  flex: 1;
  justify-content: center;
}

.nav__link {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition:
    color var(--t-fast) var(--ease-std),
    background var(--t-fast) var(--ease-std);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link[aria-current="true"] {
  color: var(--text-1);
  background: var(--surface);
}

/* ── CTA pill ─────────────────────────────────────────────────── */
.nav__cta {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--cyan);
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(79,216,255,0.45);
  border-radius: var(--radius-full);
  text-decoration: none;
  flex-shrink: 0;
  transition:
    background var(--t-fast) var(--ease-std),
    color var(--t-fast) var(--ease-std),
    box-shadow var(--t-fast) var(--ease-std),
    transform var(--t-fast) var(--ease-out);
}

.nav__cta:hover {
  background: var(--cyan);
  color: var(--bg);
  box-shadow: 0 0 24px var(--cyan-glow);
  transform: translateY(-1px);
}
/* ── Hamburger (mobile) ───────────────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  z-index: 110;
  flex-shrink: 0;
  transition: 
    background var(--t-fast) var(--ease-std),
    border-color var(--t-fast) var(--ease-std);
}

.nav__hamburger:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(79, 216, 255, 0.45);
}

.nav__hamburger-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-1);
  border-radius: 1px;
  transition:
    transform var(--t-med) var(--ease-out),
    opacity var(--t-med) var(--ease-out);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile Floating Dropdown ─────────────────────────────────── */
.nav__mobile {
  display: none;
  position: fixed;
  top: calc(var(--nav-h) + 12px);
  right: 20px;
  width: 250px;
  z-index: 105;
  background: rgba(13, 17, 28, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  flex-direction: column;
  padding: var(--space-4) var(--space-5);
  box-shadow: 
    0 16px 40px rgba(0, 0, 0, 0.6), 
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px) scale(0.95);
  transform-origin: top right;
  transition: 
    opacity var(--t-med) var(--ease-std),
    transform var(--t-med) var(--ease-std);
}

.nav__mobile.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0) scale(1);
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  width: 100%;
}

.nav__mobile-links li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav__mobile-links li:last-child {
  border-bottom: none;
}

.nav__mobile-link {
  font-family: var(--ff-body);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--text-2);
  text-decoration: none;
  display: block;
  padding: var(--space-3) 0;
  transition: 
    color var(--t-fast) var(--ease-std),
    padding-left var(--t-fast) var(--ease-std);
}

.nav__mobile-link:hover {
  color: var(--cyan);
  padding-left: var(--space-2);
}

.nav__mobile-cta {
  margin-top: var(--space-4);
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--cyan);
  text-align: center;
  padding: 0.75rem var(--space-4);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition:
    background var(--t-fast) var(--ease-std),
    color var(--t-fast) var(--ease-std),
    box-shadow var(--t-fast) var(--ease-std);
  width: 100%;
  box-sizing: border-box;
}

.nav__mobile-cta:hover {
  background: var(--cyan);
  color: var(--bg);
  box-shadow: 0 0 16px rgba(79, 216, 255, 0.35);
}

/* ── Mobile breakpoint ────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links,
  .nav__cta    { display: none; }
  .nav__hamburger { display: flex; }
  .nav__mobile    { display: flex; }
}