/* ===================================================================
   DESIGN SYSTEM — Shell applicatif (marque + bandeaux + slots nav)
   Style partagé des helpers platform/core/shell-brand.js & shell-nav.js.
   Consommé par tous les outils (tierlist, factcheck…) pour un en-tête
   et une navigation cohérents. Dépend des tokens de base.css. (ADR-0006)
   =================================================================== */

/* ─── Navigation intégrée aux bandeaux d'écran (slots, pas de barre orpheline) */
.screen-head-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(10px, 2vw, 16px);
  width: 100%;
}

.screen-head-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.screen-head-nav:not(.screen-head-nav--empty) {
  padding-right: clamp(10px, 1.4vw, 14px);
  margin-right: clamp(2px, 0.4vw, 4px);
  border-right: 1px solid var(--nav-slot-sep);
}

.screen-head-nav-stack {
  display: flex;
  align-items: center;
  gap: 4px;
}

.screen-head-nav--empty,
.screen-head-aside--empty {
  width: var(--nav-btn-size);
  flex-shrink: 0;
}

.screen-head-main {
  min-width: 0;
  text-align: center;
}

.screen-head-aside {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.screen-head-aside:not(.screen-head-aside--empty) {
  padding-left: clamp(10px, 1.4vw, 14px);
  margin-left: clamp(2px, 0.4vw, 4px);
  border-left: 1px solid var(--nav-slot-sep);
}

.screen-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--nav-btn-size);
  height: var(--nav-btn-size);
  padding: 0;
  margin: 0;
  color: var(--text-faint);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    color 0.22s,
    border-color 0.22s,
    background 0.22s;
}

.screen-nav-btn .lucide-icon {
  width: var(--nav-icon-size);
  height: var(--nav-icon-size);
}

.screen-nav-btn:hover {
  color: var(--text-dim);
  border-color: var(--border);
  background: var(--surface);
}

.screen-nav-btn:focus-visible {
  color: var(--text-dim);
  border-color: var(--border-strong);
  background: var(--surface-2);
}

/* Interludes : slot nav seul, sans bandeau paper supplémentaire */
.screen-chrome-head {
  flex: 0 0 auto;
  padding: clamp(8px, 1.2vh, 10px) clamp(14px, 3vw, 24px) 0;
  background: transparent;
}

.screen-chrome-head .screen-head-nav:not(.screen-head-nav--empty) {
  border-right: none;
  padding-right: 0;
  margin-right: 0;
}

/* ─── Gabarits shell — marque + en-têtes unifiés (user / admin) */
.shell-head {
  flex: 0 0 auto;
  background: var(--paper);
  padding: clamp(12px, 2vh, 18px) clamp(16px, 4vw, 32px) clamp(10px, 1.4vh, 14px);
  box-shadow: 0 4px 20px rgba(21, 17, 14, 0.05);
}

.shell-head--user .screen-head-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.shell-head--admin .screen-head-main {
  text-align: left;
}

.shell-head-lead {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 0;
  line-height: 1.45;
  max-width: 46ch;
}

.shell-brand {
  display: block;
  flex-shrink: 0;
  margin: 0;
  padding: 0;
  border: 1px solid rgba(21, 17, 14, 0.14);
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: #0a0a0a;
  line-height: 0;
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    border-color 0.22s,
    box-shadow 0.22s,
    transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.shell-brand:hover {
  border-color: rgba(21, 17, 14, 0.28);
  box-shadow: 0 4px 14px rgba(21, 17, 14, 0.12);
  transform: translateY(-1px);
}

.shell-brand:focus-visible {
  outline: 2px solid var(--seam);
  outline-offset: 2px;
}

.shell-brand-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.shell-brand--user { width: clamp(76px, 15vw, 104px); }
.shell-brand--admin { width: clamp(68px, 13vw, 92px); }
.shell-brand--compact { width: clamp(52px, 11vw, 68px); }

.screen-head-nav-stack .shell-brand + .screen-nav-btn,
.screen-head-nav-stack .screen-nav-btn + .shell-brand {
  margin-left: 2px;
}