/* ════════════════════════════════════════════════════════
   nav.css — Navegació principal de Karel
   Funciona amb style.css (index / edit-mapa) i curs.css
════════════════════════════════════════════════════════ */

/* ── Nav inline (desktop) ──────────────────────────────── */
.karel-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-family: var(--mono, 'Space Mono', monospace);
  font-size: 0.68rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.karel-nav-link {
  color: var(--muted);
  text-decoration: none;
  padding: 3px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.karel-nav-link:hover {
  color: var(--text);
  text-decoration: none;
  border-bottom-color: var(--muted);
}

.karel-nav-link.active {
  color: var(--text);
  font-weight: 700;
  border-bottom-color: transparent;
}

/* ── Separador vertical entre logo i nav ─────────────── */
.karel-nav-sep {
  width: 1px;
  height: 16px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── Botó hamburger (mòbil, topbar pages) ────────────── */
.karel-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  padding: 5px 9px;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.karel-nav-toggle:hover {
  color: var(--text);
  border-color: var(--text);
}

/* ── Gaveta mòbil (dropdown) ─────────────────────────── */
.karel-nav-drawer {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  z-index: 500;
  flex-direction: column;
  padding: 0.5rem 0;
  /* top s'aplica per JS o via --topbar-h */
  top: var(--topbar-h, 46px);
}

.karel-nav-drawer.is-open {
  display: flex;
}

.karel-nav-drawer .karel-nav-link {
  display: block;
  padding: 0.85rem 1.5rem;
  font-size: 0.72rem;
  color: var(--muted);
  border-bottom: none;
}

.karel-nav-drawer .karel-nav-link:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--border) 40%, transparent);
}

.karel-nav-drawer .karel-nav-link.active {
  color: var(--text);
  font-weight: 700;
}

/* ── Mobile breakpoint ───────────────────────────────── */
@media (max-width: 640px) {

  /* Amaga nav inline */
  .karel-nav,
  .karel-nav-sep {
    display: none;
  }

  /* Mostra toggle a topbar i a curs/index (sense sidebar) */
  .topbar .karel-nav-toggle,
  .curs-header .karel-nav-toggle {
    display: inline-flex;
    align-items: center;
  }
}

/* ── Botó "Netejar històric" ─────────────────────────── */
.karel-clear-btn {
  font-family: var(--mono, 'Space Mono', monospace);
  font-size: 0.65rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--muted);
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 3px 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.karel-clear-btn:hover {
  color: var(--error, #dc2626);
  border-color: var(--error, #dc2626);
}

/* En pantalles estretes, el botó "Netejar històric" desborda la topbar
   (té white-space:nowrap + flex-shrink:0). El compactem a una icona. */
@media (max-width: 480px) {
  .karel-clear-btn {
    font-size: 0;           /* amaga el text */
    padding: 3px 6px;
    line-height: 1;
  }
  .karel-clear-btn::before {
    content: "✕";
    font-size: 0.9rem;
    letter-spacing: 0;
  }
}