/* ── App shell ─────────────────────────────────────────── */
#app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ───────────────────────────────────────────── */
#sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform var(--transition);
  z-index: 100;
}

.sidebar-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

/* Vault selector */
.vault-selector {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.vault-selector-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
#vault-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
}
#vault-select:focus { border-color: var(--primary); }

.btn-new-vault {
  width: 100%;
  margin-top: 8px;
  padding: 7px;
  font-size: 0.8rem;
  border-radius: var(--radius);
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px dashed var(--primary-dim);
  transition: all var(--transition);
}
.btn-new-vault:hover { background: var(--primary); color: var(--primary-text); }

/* Nav links */
.nav-section {
  padding: 12px 0 4px;
}
.nav-section-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 20px;
  margin-bottom: 4px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  border-left: 2px solid transparent;
  user-select: none;
}
.nav-link svg { flex-shrink: 0; width: 16px; height: 16px; }
.nav-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-link.active {
  color: var(--primary);
  background: var(--primary-glow);
  border-left-color: var(--primary);
}

/* Sidebar footer */
.sidebar-footer {
  margin-top: auto;
  padding: 16px;
  border-top: 1px solid var(--border);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.sidebar-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--primary-glow);
  border: 1px solid var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.btn-logout {
  width: 100%;
  padding: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.btn-logout:hover { color: var(--danger); border-color: var(--danger); }


/* ── Main content ──────────────────────────────────────── */
#main-content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
}

.page-header {
  padding: 28px 32px 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}
.page-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.page-body {
  padding: 24px 32px 40px;
  flex: 1;
}

/* ── App footer ─────────────────────────────────────────── */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 14px 32px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
}
.app-footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.app-footer a:hover { color: var(--primary); }
.app-footer-sep { color: var(--border); }

/* ── Mobile overlay ────────────────────────────────────── */
#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}

/* ── Mobile topbar ─────────────────────────────────────── */
#topbar {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 56px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#topbar svg { color: var(--primary); }
#topbar-title { font-weight: 700; font-size: 1rem; }
#topbar-title em { color: var(--primary); font-style: normal; }
#btn-menu { background: none; border: none; color: var(--text-secondary); padding: 4px; margin-right: 4px; }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  #topbar { display: flex; }
  #app-shell { flex-direction: column; height: auto; min-height: 100vh; }
  #sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow);
  }
  #sidebar.open { transform: translateX(0); }
  #sidebar-overlay.open { display: block; }
  #main-content { overflow-y: auto; }
  .page-header { padding: 20px 16px 0; }
  .page-body   { padding: 16px 16px 32px; }
}