/* ═══════════════════════════════════════════════════════════
   HEADER — numbered nav + avatar + accent color picker
   ═══════════════════════════════════════════════════════════ */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: var(--blur-nav);
  -webkit-backdrop-filter: var(--blur-nav);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding-block: 1rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  line-height: 1.15;
  white-space: nowrap;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand-photo {
  position: relative;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.nav-brand-photo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  display: block;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--dur-base) var(--ease-out-quart);
}

.nav-brand:hover .nav-brand-photo img,
.nav-brand:focus-visible .nav-brand-photo img {
  border-color: var(--accent);
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent),
    0 0 22px var(--accent-glow),
    0 0 40px var(--accent-glow);
  transform: scale(1.04);
}

.nav-brand:hover .nav-status,
.nav-brand:focus-visible .nav-status {
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent),
    0 0 16px var(--accent-glow);
}

.nav-status {
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface-0);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-name {
  font: var(--text-display-md);
  font-size: 1.05rem;
  color: var(--ink-900);
}

.nav-role {
  font-family: var(--f-mono);
  font-size: .62rem;
  color: var(--accent);
  letter-spacing: var(--tracking-wide);
  transition: color var(--transition);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .35rem 0 .55rem;
  color: var(--ink-900);
  text-decoration: none;
  white-space: nowrap;
  transition: opacity var(--dur-fast);
}

.nav-links a:hover {
  opacity: 1;
}

.nav-links a:hover .nav-label {
  color: var(--ink-900);
}

.nav-num {
  font-family: var(--f-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.nav-label {
  font-family: var(--f-body);
  font-size: .92rem;
  font-weight: 400;
  text-transform: lowercase;
  color: var(--ink-700);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  box-shadow: 0 0 12px var(--accent-glow);
  transition:
    transform var(--dur-base) var(--ease-out-quart),
    background var(--transition),
    box-shadow var(--transition);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-links a[aria-current="page"] {
  opacity: 1;
}

.nav-links a[aria-current="page"] .nav-label {
  color: var(--ink-900);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

.control-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--surface-0);
  color: var(--ink-700);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--dur-fast);
}

.control-btn:hover {
  background: var(--accent);
  color: var(--ink-900);
  border-color: var(--accent);
  box-shadow: 0 6px 18px var(--accent-glow);
  transform: translateY(-1px);
}

.control-btn svg {
  width: 18px;
  height: 18px;
}

.color-dropdown {
  position: relative;
}

.color-options {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: .75rem;
  display: none;
  gap: .5rem;
  box-shadow: var(--shadow-lg);
  z-index: 100;
}

.color-options.is-open {
  display: flex;
}

.color-option {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.color-option:hover {
  transform: scale(1.12);
}

.color-option.is-active {
  border-color: var(--ink-900);
  box-shadow: 0 0 14px currentColor;
}

.color-option[data-color="green"] { background: var(--color-green); color: var(--color-green); }
.color-option[data-color="cyan"] { background: var(--color-cyan); color: var(--color-cyan); }
.color-option[data-color="pink"] { background: var(--color-pink); color: var(--color-pink); }
.color-option[data-color="purple"] { background: var(--color-purple); color: var(--color-purple); }
.color-option[data-color="orange"] { background: var(--color-orange); color: var(--color-orange); }

.lang-toggle {
  display: flex;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
  background: var(--surface-0);
}

.lang-btn {
  font-family: var(--f-mono);
  font-size: .7rem;
  font-weight: 700;
  padding: .35rem .65rem;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--ink-500);
  transition: background var(--dur-fast), color var(--dur-fast);
}

.lang-btn:hover {
  color: var(--ink-900);
}

.lang-active {
  background: var(--ink-900);
  color: var(--surface-0);
}

/* ── Side neon scroll dots ─────────────────────────────── */
.side-dots {
  position: fixed;
  right: clamp(0.75rem, 2vw, 1.5rem);
  top: 50%;
  translate: 0 -50%;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  padding: 0.5rem 0;
  pointer-events: none;
}

.side-dots a {
  pointer-events: auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid color-mix(in srgb, var(--accent) 55%, transparent);
  background: transparent;
  box-shadow: 0 0 0 transparent;
  transition:
    background var(--dur-base) var(--ease-out-quart),
    border-color var(--dur-base) var(--ease-out-quart),
    box-shadow var(--dur-base) var(--ease-out-quart),
    transform var(--dur-base) var(--ease-out-quart);
}

.side-dots a:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.15);
}

.side-dots a.is-active,
.side-dots a[aria-current="page"] {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent),
    0 0 16px var(--accent-glow);
  animation: side-dot-pulse 2.4s ease-in-out infinite;
}

@keyframes side-dot-pulse {
  0%, 100% {
    box-shadow:
      0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent),
      0 0 14px var(--accent-glow);
  }
  50% {
    box-shadow:
      0 0 0 7px color-mix(in srgb, var(--accent) 8%, transparent),
      0 0 22px var(--accent-glow);
  }
}

@media (max-width: 900px) {
  .side-dots {
    display: none;
  }
}