/* ── BACKGROUND ── */
#bg{position:fixed;inset:0;z-index:var(--z-base);pointer-events:none;background:var(--bg);}
#bg::after{display:none;}

/* ── PARTICLES ── */
.particle{position:fixed;border-radius:50%;pointer-events:none;z-index:var(--z-base);}
@keyframes drift{0%{transform:translateY(0) translateX(0);opacity:0.5}50%{opacity:1}100%{transform:translateY(-100px) translateX(30px);opacity:0}}

/* ── HEADER ── */
#header{position:fixed;top:0;left:0;right:0;z-index:var(--z-nav);padding:1rem 1.5rem 3rem;
  background:linear-gradient(to bottom,var(--bg) 40%,transparent);
  display:flex;flex-direction:column;align-items:flex-start;pointer-events:none;}
.title-wrap{pointer-events:none;}
.title-main{font-family:var(--font-head);font-size:clamp(1.2rem,2.5vw,1.8rem);font-weight:700;
  color:var(--text-primary);letter-spacing:-0.01em;line-height:1;}
.title-sub{font-size:clamp(0.6rem,1vw,0.7rem);color:var(--text-secondary);letter-spacing:0.15em;
  text-transform:uppercase;margin-top:0.35rem;opacity:0.9;}
[data-theme="light"] .title-main{color:var(--text-primary) !important;}
[data-theme="light"] .title-sub{color:var(--text-secondary) !important;}
/* ── SEARCH BAR ── */
#search-wrap{position:fixed;top:1rem;left:50%;transform:translateX(-50%);z-index:var(--z-search);
  display:flex;align-items:center;gap:8px;pointer-events:all;max-width:calc(100% - 10rem);}
#search-input{background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-full);padding:0.5rem 1rem 0.5rem 2.2rem;color:var(--text-primary);
  font-family:var(--font-sans);font-size:0.813rem;width:240px;outline:none;
  transition:all var(--transition-fast);backdrop-filter:var(--glass-blur);box-shadow:var(--shadow-1);}
#search-input::placeholder{color:var(--text-secondary);opacity:0.5;}
#search-input:focus{border-color:var(--accent);width:300px;box-shadow:0 0 0 3px var(--accent-dim),var(--shadow-2);}
#search-icon{position:absolute;left:1.35rem;color:var(--text-secondary);font-size:0.75rem;pointer-events:none;}
#search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
  overflow:hidden;display:none;max-height:220px;overflow-y:auto;
  box-shadow:var(--shadow-2);}
#search-results.show{display:block;}
.sr-item{padding:0.5rem 0.9rem;cursor:pointer;font-size:0.813rem;color:var(--text-secondary);
  border-bottom:1px solid var(--border);display:flex;align-items:center;gap:0.5rem;transition:background var(--transition-fast);}
.sr-item:hover{background:var(--accent-primary-dim);color:var(--text-primary);}
.sr-item:last-child{border-bottom:none;}
.sr-item .sri-icon{font-size:1rem;}
.sr-item .sri-name{font-weight:500;}
.sr-item .sri-sub{font-size:0.68rem;color:var(--text-secondary);margin-left:auto;}

/* ── SEARCH PILLS (extinct toggle, hominins tab) ── */
.search-pill{font-family:var(--font-sans);font-size:0.8rem;padding:0.3rem 0.75rem;
  border-radius:var(--radius-full);border:1px solid var(--border);background:var(--surface);
  cursor:pointer;color:var(--text-secondary);white-space:nowrap;flex-shrink:0;
  display:inline-flex;align-items:center;gap:6px;transition:all var(--transition-fast);}
.search-pill:hover{border-color:var(--accent-primary);color:var(--text-primary);background:var(--accent-primary-dim);}
.search-pill:active{transform:scale(0.97);}
[data-theme="light"] .search-pill{background:var(--surface);border-color:var(--border);color:var(--text-secondary);}
[data-theme="light"] .search-pill:hover{border-color:var(--accent-primary);color:var(--accent-primary);}

/* ── BREADCRUMB ── */
#breadcrumb{position:fixed;top:4.2rem;left:50%;transform:translateX(-50%);z-index:var(--z-nav);
  display:flex;align-items:center;gap:0;pointer-events:all;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-full);
  padding:0.3rem 0.8rem;
  max-width:min(600px,90vw);overflow:hidden;}
.bc-item{font-size:0.65rem;color:var(--text-secondary);cursor:pointer;white-space:nowrap;
  padding:0 0.1rem;transition:color var(--transition-fast);letter-spacing:0.04em;}
.bc-item:hover{color:var(--accent-primary);}
.bc-item.active{color:var(--text-primary);cursor:default;}
.bc-sep{font-size:0.55rem;color:var(--text-secondary);opacity:0.4;padding:0 0.3rem;}
#breadcrumb.hidden{display:none;}

/* ── NAV CONTROLS (Back / Home) ── */
#nav-ctrl{position:fixed;top:4.2rem;left:1.2rem;z-index:calc(var(--z-nav) + 50);display:flex;align-items:center;gap:0.35rem;
  pointer-events:all;opacity:0;transform:translateY(-6px);transition:opacity 0.25s ease,transform 0.25s ease;visibility:hidden;}
#nav-ctrl.visible{opacity:1;transform:translateY(0);visibility:visible;}
.nav-btn{padding:0.3rem 0.7rem;background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:8px;color:var(--accent);font-size:0.8rem;font-family:var(--font-body);
  cursor:pointer;display:inline-flex;align-items:center;gap:0.3rem;transition:all var(--transition-fast);
  backdrop-filter:var(--glass-blur);letter-spacing:0.03em;white-space:nowrap;box-shadow:var(--shadow-1);}
.nav-btn:hover{background:var(--accent-primary-dim);border-color:var(--accent);color:var(--parchment);box-shadow:var(--shadow-2);}
.nav-btn:active{transform:scale(0.97);}
.nav-btn:disabled{opacity:0.3;cursor:default;pointer-events:none;}
.nav-btn .nav-arrow{display:inline-block;font-size:0.75rem;line-height:1;}
[data-theme="light"] .nav-btn{background:var(--glass-bg);border-color:var(--glass-border);color:var(--text-secondary);}
[data-theme="light"] .nav-btn:hover{background:var(--accent-primary-dim);border-color:var(--accent-primary);color:var(--accent-primary);}
[dir="rtl"] #nav-ctrl{left:auto;right:1.2rem;flex-direction:row-reverse;}
[dir="rtl"] .nav-arrow{transform:scaleX(-1);}