.portal-shell{background:var(--color-page-bg);min-height:100vh;color:var(--color-text-primary);font-family:var(--font-family)}.portal-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);height:64px;box-shadow:none;padding:0 var(--space-6);z-index:var(--z-header);justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.portal-header-left{align-items:center;display:flex}.portal-logo{align-items:center;line-height:0;display:inline-flex}.portal-header-right{align-items:center;gap:var(--space-4);display:flex}.portal-theme-toggle{border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);width:36px;height:36px;color:var(--color-text-secondary);cursor:pointer;font-size:var(--text-lg);transition:background var(--transition-fast), color var(--transition-fast);justify-content:center;align-items:center;display:flex}.portal-theme-toggle:hover{background:var(--color-surface-hover);color:var(--color-text-primary)}.portal-help-btn{border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);width:36px;height:36px;color:var(--color-text-secondary);cursor:pointer;transition:background var(--transition-fast), color var(--transition-fast);justify-content:center;align-items:center;display:flex}.portal-help-btn:hover{background:var(--color-surface-hover);color:var(--color-text-primary)}.portal-help-btn:focus-visible{outline:2px solid var(--color-brand);outline-offset:2px}.portal-content{padding:var(--space-6);max-width:1200px;margin:0 auto}